Oilstone chuck for grinding bearing

Abstract

An oilstone chuck for bearing grinding comprises a clamping body and a pressing block, a clamping hole extending up and down is formed in the front end of the clamping body, a screw hole is formed in the side face of the clamping hole, a fastening bolt is connected into the screw hole in a threaded mode and can abut against the pressing block, and a long and narrow hole penetrating up and down and extending to the clamping hole is formed in the length direction of the clamping body. The oilstone clamp is located in the clamping hole, a mounting channel which extends up and down and is used for allowing an oilstone to be inserted is formed in the oilstone clamp, notches which correspond to the long and narrow holes and are formed from top to bottom are formed in the opposite side walls of the oilstone clamp, and a positioning groove communicated with the mounting channel is formed in the side face, facing the screw hole, of the oilstone clamp; the pressing block is inserted into the positioning groove and can be in contact with the oilstone in the mounting channel; a fastener is further arranged between the two side walls of the long and narrow hole, and the fastener enables the two side walls of the long hole to be close to each other so as to clamp the two elastic walls of the oilstone clamp located in the clamping hole. By adopting the oilstone chuck, the oilstone can be prevented from being broken, so that the service life of the oilstone is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of grinding device, specifically points to a kind of oilstone chuck for grinding the inner and outer rings of bearing. BACKGROUND

[0002] Oilstone is fine and tough, usually made into bar body after installation on machine tool to grind surface to be processed. In order to realize superfinishing of surface to be processed, the oilstone is often clamped in oilstone chuck, i.e. installed in superfinishing machine and other machine tools through oilstone chuck, such as the structure disclosed in the document with authorized publication number CN213561703U, the oilstone chuck includes clamping body for placing oilstone and pressing plate component for pressing oilstone, the front end of clamping body is provided with clamping hole, the rear end of clamping body is provided with stop block, oilstone is placed in clamping hole, pressing plate component is L-shaped, sliding groove is provided on pressing plate component, sliding groove can cooperate with fastening screw, when pressing plate component cooperates with clamping body through fastening screw, pressing plate component also cooperates with oilstone and stop block respectively. The oilstone chuck can ensure the stability of contact between oilstone and surface to be processed.

[0003] The oilstone installed in oilstone chuck needs to be applied with a pre-tightening pressure towards surface to be processed during grinding processing, to ensure that oilstone and surface to be processed have appropriate friction. However, the application of this pressure will cause continuous wear of oilstone, which needs to be compensated by feeding along the length direction of oilstone from time to time, and also easily cause breaking phenomenon of oilstone, especially when grinding raceway of inner and outer rings of micro bearing or thin-walled bearing, since the oilstone applied to the bearing is relatively slender, the breaking phenomenon of oilstone is more likely to occur.

[0004] Therefore, the existing oilstone chuck needs to be further improved. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problem in view of the present situation of prior art, provides an oilstone chuck for bearing grinding, which can prevent oilstone from breaking to prolong its service life.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an oilstone chuck for bearing grinding, comprising a clamping body and a pressure block for pressing the oilstone, wherein the front end of the clamping body has a clamping hole extending vertically, and a screw hole is formed on the side of the clamping hole, and a fastening bolt is threaded into the screw hole and can abut against the pressure block; the characteristic feature is that: the clamping body also has a narrow, elongated hole extending vertically through to the clamping hole in the length direction, and also includes an oilstone clamp located in the clamping hole, the oilstone clamp having a vertically extending opening for inserting the oilstone. The installation channel has a notch on its opposite sidewalls that corresponds to the aforementioned elongated hole and extends from top to bottom, forming two elastic walls on the local sidewalls of the installation channel that can be brought closer together under external force. The oilstone clamp also has a positioning groove on its side facing the screw hole that communicates with the installation channel. The pressure block is inserted into the positioning groove and can contact the oilstone in the installation channel. Fasteners are also provided between the two sidewalls of the aforementioned elongated hole, which can bring the two sidewalls of the elongated hole closer together and clamp the two elastic walls of the oilstone clamp located in the clamping hole.

[0007] After the notch is made, in order to ensure the rigidity of the whetstone clamp as much as possible, the bottom surface of the notch is designed as a slope. The slope gradually decreases from the whetstone clamp towards the narrow hole side. The slope design can improve the connection strength between the two elastic walls at the bottom of the whetstone clamp. On the other hand, after the whetstone wears down, it provides enough downward space for the pressure bar (which holds the upper end of the whetstone and is connected to the drive source such as the cylinder so that it can move up and down) to press down the whetstone, so as to make full use of the whetstone.

[0008] In the above scheme, in order to prevent the oilstone clamp from moving down when the oilstone moves down, a further improvement is that the upper outer sides of the two elastic walls also extend outwards with limiting protrusions, and the lower bottom surface of each limiting protrusion can abut against the upper end surface of the clamping hole.

[0009] In all the above solutions, an elastic pad is provided between the fastening bolt and the pressure block to prevent the fastening bolt from damaging the surface of the pressure block.

[0010] To avoid interference with other components, the outer periphery of both the upper and lower ends of the oilstone clamp is chamfered.

[0011] For ease of adjustment and manufacturing, it is preferable that the fastener is an adjusting bolt, and that the two side walls of the elongated hole have corresponding through holes and adjusting screw holes, and that the adjusting bolt passes through the through hole and is threaded into the adjusting screw hole.

[0012] In the above solution, a further improvement is that a long groove is formed on the top surface of the clamping body, which runs through the front and rear ends of the clamping body, and the narrow hole is located on the bottom surface of the long groove, which makes the side wall of the clamping body more elastic.

[0013] Further, the width of the long groove and the notch is allowed to pass the press bar for driving the oil stone downward, avoiding the interference when the press bar is downward, and ensuring the maximum downward amount of the press bar.

[0014] Compared with the prior art, the utility model discloses a long hole is designed on the clamping body, so that the sidewall of the clamping body is elastic, and the oil stone holder with two elastic walls in the upper part is additionally arranged, so that when the oil stone is installed, the oil stone is inserted into the installation channel of the oil stone holder and contacts the press block in the positioning groove, and then is placed in the clamping hole of the clamping body, the two sidewalls of the long hole are relatively close to each other by the fastener, and the two elastic walls on the clamping body are pushed to clamp the upper part of the oil stone, so that the contact area between the oil stone and the oil stone holder and between the oil stone holder and the clamping body is large, and the clamping force can be improved, the lower part of the oil stone is further clamped by rotating the fastening bolt to push the press block, the oil stone is clamped under the double clamping, the oil stone is more stable, and the stress is uniform, the oil stone is not easy to break in the grinding process, and the service life of the oil stone is prolonged, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic view of the utility model embodiment;

[0016] Figure 2 It is a three-dimensional exploded schematic view of the utility model; Figure 1

[0017] Figure 3 It is a three-dimensional sectional schematic view of the utility model (remove the oil stone); Figure 1

[0018] Figure 4 It is a three-dimensional schematic view of the clamping body in the utility model; Figure 1

[0019] Figure 5 It is a three-dimensional schematic view of the oil stone holder in the utility model; Figure 1

[0020] Figure 6 It is a three-dimensional schematic view of the utility model after the press bar is added. Figure 1 DETAILED DESCRIPTION The utility model is further described in detail below in combination with the embodiment of the drawings.

[0021] The utility model is further described in detail below in combination with the embodiment of the drawings.

[0022] ​​​​In the following description of the embodiments, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "axial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation 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 device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0023] like Figures 1 to 6 As shown, the oilstone chuck can hold a relatively long oilstone 10 and is mainly used for grinding bearings. It includes a clamping body 1, an oilstone clamp 2, and a pressure block 3 for pressing the oilstone 10. The clamping body 1 is designed as a long strip. The front end of the clamping body 1 has a clamping hole 11 extending vertically. The rear end of the clamping body 1 is a mounting part with a mounting hole 12. The clamping body 1 can be fixed to the corresponding part of the ultra-precision machine (not shown in the figure) by mounting bolts passing through the mounting hole 12. The clamping body 1 also has a long and narrow hole 13 that extends vertically through the clamping hole 11. In the figure, the long and narrow hole 13 extends from the middle of the clamping body 1 to the front end. In order to have better elasticity, a long groove 14 that runs through the front and rear ends of the clamping body 1 is first opened on the top surface of the clamping body 1. The long and narrow hole 13 is located on the bottom surface of the long groove 14, that is, it extends from the middle of the long groove 14 to the front end. Due to the presence of the elongated hole 13, the sidewalls of the clamping body 1 located on both sides of the elongated hole 13 and the clamping hole 11 are elastic, allowing them to move closer together under external force and clamp the oilstone clamp 2 described below. Specifically, a fastener, an adjusting bolt 4, is provided between the two sidewalls of the elongated hole 13. The two sidewalls of the elongated hole 13 have corresponding through holes 15 and adjusting screw holes 16, respectively. The adjusting bolt 4 passes through the through hole 15 and is threaded into the adjusting screw hole 16. Thus, rotating the adjusting bolt 4 allows the two sidewalls of the elongated hole 13 to move closer together and clamp the oilstone clamp 2 located in the clamping hole 11.

[0024] Meanwhile, a screw hole 17 is also opened on the side of the corresponding clamping hole 11, and a fastening bolt 5 is threaded into the screw hole 17 and can abut against the aforementioned pressure block 3.

[0025] The oil stone holder 2 is located in the holding hole 11, and has an installation channel 21 extending upward and downward for inserting the oil stone. The opposite side walls of the upper part of the oil stone holder 2 have notches 22 corresponding to the long hole 13, so that the side walls of the installation channel 21 (the middle and upper parts) form two elastic walls which can be relatively close to each other under the action of external force. The oil stone holder 2 has a positioning groove 23 on the side surface facing the screw hole 17, and the pressing block 3 is inserted into the positioning groove 23 and can contact the oil stone 10 in the installation channel 21. Thus, the fastening bolt 5 is rotated to press the pressing block 3, and then the oil stone 10 is pressed. In this process, the elastic pad 6 is arranged between the fastening bolt 5 and the pressing block 3 to prevent the surface of the oil stone 10 from being pressed.

[0026] In order to avoid interference with other components during operation, the outer periphery of the upper and lower ends of the oil stone holder 2 has a chamfer 24, please see Figure 5 .

[0027] Since the oil stone 10 will be worn and shortened during grinding, in order to make full use of the oil stone, a pressing strip 7 is arranged on the upper end of the oil stone on the superfinishing machine, please see Figure 6 . The pressing strip 7 is connected with the piston rod of the air cylinder (not shown in the figure), and when needed, the piston rod of the air cylinder is lowered to drive the pressing strip 7 to move downward, and then the oil stone 10 is pushed to move downward as needed. In order to obtain the maximum downward movement of the pressing strip 7, in this embodiment, the bottom surface of the notch 22 is designed as a slope 221 which gradually decreases from the oil stone holder 2 to the long hole side. In this way, the connection strength between the two elastic walls on the middle and upper parts of the oil stone holder can be improved, the rigidity of the oil stone holder is improved, and when the pressing strip 7 moves downward, the downward movement of the pressing strip 7 can be improved as much as possible to improve the utilization rate of the oil stone. At this time, the length of the groove 14 and the width of the notch 22 are both allowed to pass through the pressing strip 7, that is, the length of the groove 14 on the top surface of the holding body 1 becomes a avoiding groove for the pressing strip 7 to move up and down.

[0028] In order to prevent the oil stone holder 2 from moving downward with the oil stone 10, the outer side of the upper end of each elastic wall further extends a limiting protrusion 25, and the lower bottom surface of each limiting protrusion 25 can abut against the upper end surface of the holding hole 11 to prevent the downward movement of the oil stone holder 10.

[0029] Obviously, by using the fastening member to relatively close the two side walls of the long hole, and by pushing the two side walls on the holding body to clamp the upper part of the oil stone through the two elastic walls of the oil stone holder, and by further pushing the pressing block by rotating the fastening bolt, the lower part of the oil stone is clamped, the oil stone is clamped more stably under the double clamping, the force is uniformly distributed, the oil stone is not easy to break during grinding, and the long service life and low use cost are finally achieved.

Claims

1. A holder for a sharpening stone for bearings, comprising a holder body (1) and a pressure block (3) for pressing the sharpening stone, a clamping hole (11) extending upwardly and downwardly is formed in the front end portion of the holder body (1), a screw hole (17) is formed in the side surface of the clamping hole (11), a fastening bolt (5) is threadedly connected in the screw hole and can abut against the pressure block, characterized in that: The clamping body (1) is further provided with a long hole (13) extending through the clamping body (1) from top to bottom and reaching the clamping hole (11), and further comprises a whetstone holder (2) arranged in the clamping hole (11), the whetstone holder (2) is provided with an installation channel (21) extending from top to bottom and used for inserting a whetstone, the opposite side walls of the whetstone holder (2) are provided with notches (22) extending from top to bottom and corresponding to the long hole (13), so that the partial side walls of the installation channel (21) form two elastic walls capable of being relatively close to each other under the action of an external force, the whetstone holder (2) is further provided with a positioning groove (23) penetrating the installation channel (21) on the side facing the screw hole, the pressing block (3) is arranged in the positioning groove (23) and capable of being in contact with the whetstone in the installation channel (21), and the long hole (13) is further provided with a fastener between the two side walls, the fastener can relatively close the two side walls of the long hole (13) to clamp the two elastic walls of the whetstone holder (2) in the clamping hole (11). ​ 2. The oil stone holder for bearing grinding according to claim 1, characterized in that: The bottom surface of the notch (22) is designed as an inclined surface (221) gradually decreasing from the whetstone holder (2) to the long hole.

3. The oilstone holder for bearing grinding according to claim 1 or 2, characterized in that: The outer side of the upper end of each of the two elastic walls further extends outwardly to form a limiting protrusion (25), and the lower bottom surface of each limiting protrusion (25) is capable of abutting against the upper end surface of the clamping hole (11).

4. The oilstone holder for bearing grinding according to claim 1 or 2, characterized in that: An elastic pad (6) is arranged between the fastening bolt (5) and the pressing block (3).

5. The oilstone holder for bearing grinding according to claim 1 or 2, characterized in that: The outer periphery of each of the upper end and the lower end of the whetstone holder (2) is provided with a chamfer (24).

6. The oilstone holder for bearing grinding according to claim 1 or 2, characterized in that: The fastener is an adjusting bolt (4), the two side walls of the long hole (13) are respectively provided with corresponding through holes (15) and adjusting screw holes (16), and the adjusting bolt (4) is threadedly connected in the adjusting screw hole (16) after penetrating the through hole (15).

7. The oilstone holder for bearing grinding according to claim 1 or 2, characterized in that: The top surface of the clamping body (1) is provided with a long groove (14) penetrating the front end and the rear end of the clamping body (1), and the long hole (13) is arranged on the bottom surface of the long groove (14).

8. The oil stone holder for bearing grinding according to claim 7, wherein: The widths of the long groove (14) and the notch (22) are both allowed to pass the pressing strip (7) used for driving the whetstone (10) to move downward.

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