A grinding device for electrically driving a main shaft to precisely grind a blade

Abstract

The application discloses a grinding device for electric drive spindle fine turning blade, which comprises a support, a crank cam rotatably arranged on the support through a central rotating shaft, a tool holder table slidably arranged on the support, a tool holder rotatably arranged on the tool holder table, a blade mounted on the tool holder, a sliding block arranged on the support and capable of sliding along the length direction of the support, a lever slidably connected with the sliding block, a lever driving assembly arranged on the sliding block to drive the lever to move in the width direction of the sliding block along with the sliding of the sliding block along the length direction of the support, and a sand strip arranged along the length direction of the support, wherein an elastic element is arranged between the sand strip and the support to enable the sand strip to float in the height direction relative to the support. When the crank cam of the grinding device rotates, the tool holder can be driven to move the blade in the linear direction, and the tool holder can be driven to rotate to swing the blade, so that the grinding of the electric drive spindle fine turning blade with a circular arc shape is realized.

Description

Technical Field

[0001] This invention relates to a sharpening device, and more particularly to a sharpening device for cutting blades. Background Technology

[0002] Electric drive spindles are key components in the powertrain of new energy vehicles, and the machining efficiency and surface quality of the precision turning inserts for electric drive spindles are of great significance to their production. The larger the tip radius of the inserts used for machining electric drive spindles, the smaller the surface roughness, the faster the feed rate, and the higher the efficiency. Therefore, electric drive spindles generally use large-radius precision machining inserts, making the sharpening of the cutting edge radius of these inserts crucial to their manufacturing process.

[0003] Currently, five-axis CNC tool grinders are generally used for tool regrinding. However, this method is costly and requires highly skilled workers. Furthermore, the circular arc cutting edge demands high precision from the five-axis CNC tool grinder, necessitating rigorous maintenance and frequent calibration of the grinder's accuracy. This makes operation complex and maintenance costs high. Summary of the Invention

[0004] The purpose of this invention is to provide a regrinding device for precision turning inserts of electric drive spindles, which can regrind arc-shaped precision turning inserts of electric drive spindles. It has a simple structure, low manufacturing and maintenance costs, good reliability, and is easy to operate, thereby improving production efficiency.

[0005] To achieve the above objectives, the present invention provides a regrinding device for precision turning cutting tools of an electric spindle, comprising:

[0006] support;

[0007] A crank cam, which is rotatably mounted on the bracket via its central axis; the crank cam has a cam portion and a crank arm;

[0008] A tool holder includes a vertical arm and a horizontal arm, wherein the vertical arm has a vertically extending groove, and the crank is correspondingly disposed in the groove and can slide along the groove;

[0009] A tool holder has a tool holder pivot at one end, which is installed by passing through a tool holder pivot mounting hole at the head end of the transverse arm. The tool holder pivot has an outwardly extending swing rod, and the other end of the tool holder has a blade.

[0010] A slider is mounted on the support and can slide along the length of the support. The slider is connected to the first end of the transverse arm via a slider pivot.

[0011] A lever is slidably connected to the slider, and the lever is provided with a swing rod groove for accommodating the swing rod, the swing rod groove extending along the length direction of the bracket;

[0012] A lever drive assembly, which is disposed on the slider, drives the lever to move in the width direction of the slider as the slider slides along the length direction of the bracket;

[0013] A sanding strip is provided along the length of the support and below the cam. An elastic element is provided between the sanding strip and the support so that the sanding strip can float relative to the support in the height direction.

[0014] When the crank cam rotates around its central axis, the crankshaft drives the tool holder and slider to reciprocate along the support in a linear direction. When the tool holder and slider move in the first linear direction, the blade moves in the first linear direction, and the cam presses the sanding strip down relative to the support so that the blade does not contact the sanding strip. When the crank cam continues to rotate around its central axis, the tool holder and slider move along the support in a second linear direction opposite to the first linear direction, driving the blade to move in the second linear direction. The sanding strip is raised relative to the support so that the blade contacts the sanding strip.

[0015] The slider reciprocates along the support in a linear direction, causing the tool holder to rotate around the axis of the tool holder's rotation shaft.

[0016] Furthermore, the grinding device for precision turning inserts of an electrically driven spindle described in this invention also includes a motor, which is connected to the central shaft of the crank cam via a coupling.

[0017] Furthermore, in the regrinding device for precision turning inserts of an electric spindle described in this invention, a guide rail is provided on the transverse arm, and a guide groove adapted to the guide rail is provided on the bracket along its length direction.

[0018] Furthermore, in the regrinding device for precision turning inserts of an electrically driven spindle described in this invention, the elastic element includes a helical spring.

[0019] Furthermore, in the grinding device for precision turning inserts of an electric spindle described in this invention, the slider is provided with a sliding groove hole, and the slider is slidably connected to the bracket through the sliding groove hole.

[0020] Furthermore, in the regrinding device for precision turning inserts of an electric spindle described in this invention, the tool holder shaft is axially limited by a snap ring sleeved on it.

[0021] Furthermore, in the grinding device for precision turning inserts of an electric spindle described in this invention, the abrasive strip includes a main body and a secondary body arranged parallel to the main body. The secondary body is located below the cam portion, and the main body is located below the insert.

[0022] Furthermore, in the grinding device for precision turning inserts of an electric spindle described in this invention, a guide rail pair is provided between the slider and the lever.

[0023] Furthermore, in the regrinding device for precision turning inserts of an electric spindle described in this invention, the insert is connected to the tool holder by bolts.

[0024] Furthermore, in the regrinding device for precision turning inserts of an electrically driven spindle according to the present invention, the lever drive assembly includes:

[0025] A rack support, on which a rack is provided along the length of the support;

[0026] A gear that meshes with the rack; the gear is rotatably mounted on the slider, and the gear is provided with a gear crank;

[0027] A gear crank rotating rod is connected to the gear crank, and the gear crank rotating rod is disposed in the drive groove of the lever, the drive groove extending along the length direction of the bracket.

[0028] The grinding device for precision turning inserts of electric drive spindles described in this invention can grind arc-shaped precision turning inserts of electric drive spindles. It has a simple structure, low manufacturing and maintenance costs, good reliability, and is easy to operate, thereby improving production efficiency. Attached Figure Description

[0029] Figure 1 A schematic front view of an electrically driven spindle precision turning tool is shown.

[0030] Figure 2 A schematic side view of an electrically driven spindle precision turning tool is shown.

[0031] Figure 3 The diagram shows the overall structure of the grinding device for precision turning inserts of an electric spindle according to one embodiment of the present invention.

[0032] Figure 4 This diagram shows the overall structure of the grinding device for precision turning inserts of an electric spindle according to one embodiment of the present invention from another perspective.

[0033] Figure 5 The diagram shows a structural schematic of the support of the grinding device for precision turning inserts of an electric spindle according to one embodiment of the present invention.

[0034] Figure 6 The diagram shows a crank cam structure of one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0035] Figure 7 The diagram shows a schematic of the tool holder in one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0036] Figure 8 The diagram shows a schematic of the tool holder mounted on a tool holder table in one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0037] Figure 9 Showing Figure 3 A magnified view of a section at point I.

[0038] Figure 10 The diagram shows a structural schematic of the removal bracket of the grinding device for precision turning inserts of an electric spindle according to the present invention in one embodiment.

[0039] Figure 11 The image shows a front view of the abrasive strip in one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0040] Figure 12 The image shows a top view of the grinding strip in one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0041] Figure 13 The image shows a front view of one embodiment of the grinding apparatus for precision turning inserts of an electrically driven spindle according to the present invention.

[0042] Figure 14 for Figure 13 Sectional view at point AA.

[0043] Figure 15 The image shows a side view of one embodiment of the grinding apparatus for precision turning inserts of an electrically driven spindle according to the present invention.

[0044] Figure 16 The diagram shows the state when the crank arm moves to position M.

[0045] Figure 17 The diagram shows the state when the crank arm moves to the N position.

[0046] Figure 18 The diagram shows the state when the crank arm moves to position P.

[0047] Figure 19 The diagram shows the state when the crank arm moves to position Q.

[0048] Figure 20 for Figure 15 Sectional view at point CC. Detailed Implementation

[0049] The grinding device for precision turning cutting tools of an electric spindle according to the present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. However, this explanation and description do not constitute an improper limitation on the technical solution of the present invention.

[0050] Figure 1 A schematic front view of an electrically driven spindle precision turning tool is shown.

[0051] Figure 2 A schematic side view of an electrically driven spindle precision turning tool is shown.

[0052] Figure 1 and Figure 2 The image shows a cutting tool D for precision turning of an electric drive spindle, with an arc-shaped cutting edge. The regrinding device for precision turning cutting tools of an electric drive spindle described in this invention can regrind the aforementioned cutting tool D with an arc-shaped cutting edge.

[0053] Figure 3 The diagram shows the overall structure of the grinding device for precision turning inserts of an electric spindle according to one embodiment of the present invention.

[0054] Figure 4 This diagram shows the overall structure of the grinding device for precision turning inserts of an electric spindle according to one embodiment of the present invention from another perspective.

[0055] like Figure 3 and Figure 4 As shown, in some embodiments, the regrinding device for precision turning inserts of an electric spindle may include:

[0056] A bracket 1; a crank cam 2 rotatably mounted on the bracket 1 via its central axis; a tool holder 3 slidably mounted on the bracket 1; a tool holder 4 rotatably mounted on the tool holder 3, with the cutting blade D mounted on the tool holder 4; a slider 5 mounted on the bracket 1 and capable of sliding along the length of the bracket 1; a lever 6 slidably connected to the slider 5; a lever drive assembly 9 mounted on the slider 5 to drive the lever 6 to move in the width direction of the slider 5 as the slider 5 slides along the length of the bracket 1; and a sanding strip 7 arranged along the length of the bracket 1, with an elastic element 8 between the sanding strip 7 and the bracket 1 to allow the sanding strip 7 to float relative to the bracket 1 in the height direction.

[0057] like Figure 4As shown, in some specific embodiments, the regrinding device for the precision turning blades of the electric spindle may also include a motor 10, which is connected to the central shaft of the crank cam 2 via a coupling 101.

[0058] Figure 5 The diagram shows a structural schematic of the support of the grinding device for precision turning inserts of an electric spindle according to one embodiment of the present invention.

[0059] like Figure 5 As shown, in some specific embodiments, a guide groove 11 may be provided on the bracket 1 so that the tool holder 3 can be slidably mounted on the bracket 1. In addition, a crank cam mounting hole 12 may be provided on the bracket 1, through which the crank cam 2 can be rotatably mounted on the bracket 1.

[0060] Figure 6 The diagram shows a crank cam structure of one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0061] like Figure 6 As shown, in some specific embodiments, the crank cam 2 may be provided with a cam portion 21 and a crank rod 22.

[0062] Figure 7 The diagram shows a schematic of the tool holder in one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0063] like Figure 7 As shown, in some specific embodiments, the tool holder 3 may include a vertical arm 31 and a horizontal arm 32. The vertical arm 31 may be provided with a vertically extending groove 33, so that the crank rod 22 of the crank cam 2 can be correspondingly disposed in the groove 33 and slide along the groove 33. The horizontal arm 32 may be provided with a guide rail 34 adapted to the guide groove 11 on the bracket 1, so that the tool holder 3 can slide along the length direction of the bracket 1. In addition, the tool holder 3 may also be provided with a tool holder shaft mounting hole 35 for mounting the tool holder 4.

[0064] Figure 8 The diagram shows a schematic of the tool holder mounted on a tool holder table in one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0065] like Figure 8 As shown, in some specific embodiments, one end of the tool holder 4 may be provided with a tool holder shaft 41. The tool holder shaft 41 is installed through the tool holder shaft mounting hole 35 at the head end of the transverse arm 32, and the axial positioning of the tool holder shaft 41 is achieved by a retaining ring 43 sleeved thereon. In addition, the tool holder shaft 41 may also be provided with an outwardly extending swing rod 42.

[0066] Figure 9 Showing Figure 3 A magnified view of a section at point I.

[0067] like Figure 9 As shown, in some more specific embodiments, the blade D can be connected to the blade holder 4 by bolt 44.

[0068] Figure 10 The diagram shows a structural schematic of the removal bracket of the grinding device for precision turning inserts of an electric spindle according to the present invention in one embodiment.

[0069] like Figure 10 As shown, in some specific embodiments, the slider 5 can be connected to the first end of the transverse arm 32 of the tool holder 3 via the slider pivot 51. The slider 5 may also be provided with a sliding groove 52 so that the slider 5 can be slidably connected to the bracket 1 through the sliding groove 52.

[0070] Furthermore, in some specific embodiments, the lever drive assembly 9 may include:

[0071] A rack support 91 is provided with a rack 92 arranged along the length direction of the support 1; a gear 93 is meshed with the rack 92 and is rotatably provided on the slider 5, and a gear crank 94 is provided on the gear 93; a gear crank rotating rod 95 is connected to the gear crank 94 and is used to drive the lever 6.

[0072] Figure 11 The image shows a front view of the abrasive strip in one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0073] Figure 12 The image shows a top view of the grinding strip in one embodiment of the grinding device for precision turning inserts of an electric spindle according to the present invention.

[0074] See also Figure 10 ,like Figure 10 , Figure 11 and Figure 12 As shown, the sanding strip 7 may include a sanding strip body 71 and a sanding strip sub-body 72 arranged parallel to the sanding strip body 71. The sanding strip sub-body 72 is located below the cam portion 21, and the sanding strip body 71 is located below the blade D.

[0075] In some more specific embodiments, the elastic element 8 between the sanding strip 7 and the support 1 may include a helical spring.

[0076] Figure 13 The image shows a front view of one embodiment of the grinding apparatus for precision turning inserts of an electrically driven spindle according to the present invention.

[0077] Figure 14 for Figure 13 Sectional view at point AA.

[0078] like Figure 13 and Figure 14 As shown, in some specific embodiments, the lever 6 may be provided with a swing rod groove 61 for accommodating the swing rod 42, and the swing rod groove 61 extends along the length direction of the bracket 1. The lever 6 may also be provided with a drive groove 62, and the gear crank rotating rod 95 is disposed in the drive groove 62 of the lever 6, and the drive groove 62 extends along the length direction of the bracket 1.

[0079] In some more specific embodiments, a guide rail pair (not shown in the figure) may be provided between the slider 5 and the lever 6 to enable the lever 6 to move in the width direction of the slider 5.

[0080] In this manner, in a specific embodiment, when the blade D is regrinded, the blade D undergoes a combined linear and rotational motion along with the tool holder:

[0081] in, Figure 16 , Figure 17 , Figure 18 and Figure 19 The linear motion process of blade D is shown:

[0082] Figure 16 The diagram shows the state when the crank arm moves to position M.

[0083] Figure 17 The diagram shows the state when the crank arm moves to the N position.

[0084] Figure 18 The diagram shows the state when the crank arm moves to position P.

[0085] Figure 19 The diagram shows the state when the crank arm moves to position Q.

[0086] like Figures 15 to 19As shown, when the crank cam 2 rotates around its central axis, the crank rod 22 drives the tool holder 3 and the slider 5 to reciprocate along the support 1 in a linear direction. During the process of the crank rod 22 moving from position M to position N and then to position P, the tool holder 3 and the slider 5 move in the first linear direction. At this time, the blade D also moves in the first linear direction, and the cam part 21 presses down the abrasive strip 7 relative to the support 1 so that the blade D does not contact the abrasive strip 7. During the process of the crank cam 2 continuing to rotate, the crank rod 22 moving from position P to position Q and then to position M, the tool holder 3 and the slider 5 move in a second linear direction opposite to the first linear direction. At this time, the blade D also moves in the second linear direction, and the cam part 21 does not press down the abrasive strip 7, so that the blade D contacts the abrasive strip, thereby achieving the grinding of the blade D.

[0087] Regarding the rotation of blade D, as Figure 14 and Figure 20 As shown, as the slider 5 reciprocates along the support 1, during the meshing of gear 93 and rack 92, gear 93 rotates, thereby driving gear crank rotating rod 95 to rotate around the axis of gear 93. Gear crank rotating rod 95 drives lever 6 to reciprocate linearly along the width direction of slider 5. The swing rod groove 61 of lever 6 drives tool holder 4 to rotate back and forth around the axis E of tool holder rotation shaft 41 through the swing rod 42 of tool holder 4, thereby realizing the swing of blade D, and thus realizing the grinding of arc-shaped blade D.

[0088] It should be noted that the prior art portion of the protection scope of this invention is not limited to the embodiments given in this application. All prior art that does not contradict the solution of this invention, including but not limited to prior patent documents, prior publications, prior public uses, etc., can be included in the protection scope of this invention.

[0089] Furthermore, the combination of the technical features in this case is not limited to the combination methods described in the claims of this case or the combination methods described in the specific embodiments. All technical features described in this case can be freely combined or combined in any way, unless they contradict each other.

[0090] It should also be noted that the embodiments listed above are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and similar changes or modifications made thereto are those that can be directly derived or easily conceived by those skilled in the art from the content disclosed in the present invention, and should all fall within the protection scope of the present invention.

Claims

1. A regrinding device for precision turning cutting tools of an electric spindle, characterized in that, include: support; A crank cam, which is rotatably mounted on the bracket via its central axis; the crank cam has a cam portion and a crank arm; A tool holder includes a vertical arm and a horizontal arm, wherein the vertical arm has a vertically extending groove, and the crank is correspondingly disposed in the groove and can slide along the groove; A tool holder has a tool holder pivot at one end, which is installed by passing through the tool holder pivot mounting hole at the head end of the transverse arm. The tool holder pivot has an outwardly extending swing rod, and the other end of the tool holder has a blade. A slider is mounted on the support and can slide along the length of the support. The slider is connected to the first end of the transverse arm via a slider pivot. A lever is slidably connected to the slider, and the lever is provided with a swing rod groove for accommodating the swing rod, the swing rod groove extending along the length direction of the bracket; A lever drive assembly, which is disposed on the slider, drives the lever to move in the width direction of the slider as the slider slides along the length direction of the bracket; A sanding strip is provided along the length of the support and below the cam. An elastic element is provided between the sanding strip and the support so that the sanding strip can float relative to the support in the height direction. When the crank cam rotates around its central axis, the crankshaft drives the tool holder and slider to reciprocate along the support in a linear direction. When the tool holder and slider move in the first linear direction, the blade moves in the first linear direction, and the cam presses the sanding strip down relative to the support so that the blade does not contact the sanding strip. When the crank cam continues to rotate around its central axis, the tool holder and slider move along the support in a second linear direction opposite to the first linear direction, driving the blade to move in the second linear direction. The sanding strip is raised relative to the support so that the blade contacts the sanding strip. The slider reciprocates along the support in a linear direction, causing the tool holder to rotate around the axis of the tool holder's rotation shaft. The lever drive assembly includes: A rack support, on which a rack is provided along the length of the support; A gear that meshes with the rack; the gear is rotatably mounted on the slider, and the gear is provided with a gear crank; A gear crank rotating rod is connected to the gear crank, and the gear crank rotating rod is disposed in the drive groove of the lever, the drive groove extending along the length direction of the bracket.

2. The grinding device as described in claim 1, characterized in that, It also includes a motor, which is connected to the central shaft of the crank cam via a coupling.

3. The grinding device as described in claim 1, characterized in that, The transverse arm is provided with a guide rail, and the bracket is provided with a guide groove that is adapted to the guide rail and is arranged along its length.

4. The grinding device as described in claim 1, characterized in that, The elastic element includes a helical spring.

5. The grinding device as described in claim 1, characterized in that, The slider is provided with a sliding groove hole, and the slider is slidably connected to the bracket through the sliding groove hole.

6. The grinding device as described in claim 1, characterized in that, The axial positioning of the tool holder shaft is achieved by a retaining ring sleeved on it.

7. The grinding device as described in claim 1, characterized in that, The abrasive strip includes a main body and a secondary body arranged parallel to the main body. The secondary body is located below the cam portion, and the main body is located below the blade.

8. The grinding device as described in claim 1, characterized in that, A guide rail pair is provided between the slider and the lever.

9. The grinding device as described in claim 1, characterized in that, The blade is connected to the blade holder by bolts.

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