Arc surface forming cutting device for hard and brittle material

Abstract

The application discloses a hard and brittle material camber forming cutting device, relates to the technical field of hard and brittle material processing, and aims to solve the problem that the existing cutting device is difficult to flexibly realize the convex and concave camber forming of hard and brittle materials with different thicknesses or different cutting positions, curvature adjustment is difficult, and the degree of automation is low. The cutting device comprises a clamp unit, a cutting unit and a lifting unit. The clamp unit comprises a clamp head, a horizontal moving table and a first rotating table, and the horizontal moving table is arranged on the first rotating table. The cutting unit comprises a second rotating table and an electric cutting machine, and the second rotating table is arranged on the top of the lifting unit. The lifting unit is connected between the device mounting platform and the cutting unit. The application can realize the forming of the convex and concave camber of the hard and brittle material, continuous adjustment of the curvature, and improvement of the degree of automation of the device.

Description

Technical Field

[0001] This invention relates to the field of hard and brittle material processing technology, and in particular to a cutting device for arc-shaped forming of hard and brittle materials. Background Technology

[0002] Hard and brittle materials (such as jade and ceramics) are widely used in the manufacture of handicrafts, optical components, and precision parts due to their high hardness and brittleness. However, these materials are difficult to process, especially in the process of cutting curved surfaces. Traditional processing methods usually rely on manual operation or general cutting equipment, which has problems such as low cutting accuracy, unstable surface quality, difficulty in flexibly controlling the direction of the curved surface (convex or concave), and inability to achieve different curvature adjustments.

[0003] Furthermore, existing cutting equipment is mostly designed for flat or regular shapes, lacking specialized devices for forming curved surfaces of hard and brittle materials, making it difficult to meet diverse and high-precision processing needs. In particular, when processing surfaces with different curvature directions (such as convex or concave curved surfaces), multiple clamping or tooling changes are often required, which is not only inefficient but also makes it difficult to ensure consistency.

[0004] Therefore, there is an urgent need for a specialized cutting device that can flexibly achieve the convex and concave arc forming of hard and brittle materials and has adjustable curvature, in order to improve processing accuracy and production efficiency. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a cutting device for arc-shaped forming of hard and brittle materials, in order to solve one of the problems of existing cutting devices that are difficult to flexibly realize the arc-shaped forming of convex and concave surfaces of hard and brittle materials of different thicknesses or different cutting positions, the difficulty in curvature adjustment, and the low degree of automation.

[0006] The objective of this invention is mainly achieved through the following technical solutions: A cutting device for forming arc surfaces of hard and brittle materials includes a clamping unit, a cutting unit, and a lifting unit. The clamping unit includes a chuck, a horizontal moving table, and a first rotating table. The chuck is disposed on the horizontal moving table and is used to clamp the hard and brittle material. The horizontal moving table is disposed on the first rotating table. The first rotating table can drive the horizontal moving table and the chuck to rotate as a whole. The cutting unit is used to cut the hard and brittle material workpiece. The lifting unit is connected between the device mounting platform and the cutting unit and is used to adjust the relative height between the device mounting platform and the cutting unit.

[0007] Furthermore, the cutting unit includes a sliding seat and an electric cutter.

[0008] Furthermore, the horizontal moving stage includes a moving stage body, a support platform, and a drive rotating head.

[0009] Furthermore, the support platform is disposed on the mobile platform; the drive rotating head is connected to the mobile platform.

[0010] Furthermore, the first rotary table includes a first rotary base, a first rotary disk, and a first rotary connecting table.

[0011] Furthermore, the first rotating disk is rotatably mounted on the first rotating base, and the first rotating connecting platform is connected to the first rotating disk.

[0012] Furthermore, the lifting unit includes a first lifting connecting platform and a second lifting connecting platform, the second lifting connecting platform being connected to the cutting unit.

[0013] Furthermore, the lifting unit also includes a hand crank and a lead screw; the hand crank is located on the side of the lifting unit, and the lead screw is connected to the hand crank.

[0014] Furthermore, the cutting unit also includes a cutting drive motor and a cooling water injection pipe.

[0015] Furthermore, it also includes a drive unit, which is disposed on the mounting platform of the device and is used to provide rotational power.

[0016] Furthermore, the cutting unit includes an electric cutting machine and a second rotating table, the second rotating table being disposed on the top of the lifting unit; the electric cutting machine is used to perform cutting actions; the second rotating table includes a second rotating base and a second rotating disk; the second rotating base is fixed to the top of the lifting unit; the second rotating disk is rotatably disposed on the second rotating base.

[0017] Furthermore, when the first rotary table is fixed and the second rotary table is rotated, the electric cutting machine cuts the hard and brittle material into an outwardly convex arc surface; when the second rotary table is fixed and the first rotary table is rotated, the electric cutting machine cuts the hard and brittle material into an inwardly concave arc surface.

[0018] Furthermore, the cutting unit can control the curvature of the cut arc surface by adjusting the horizontal moving stage and the sliding seat. The horizontal moving stage can drive the moving stage body to move horizontally relative to the support stage by operating the drive rotating head, thereby adjusting the position of the hard material workpiece. The sliding seat is slidably disposed on the second rotating stage for mounting the electric cutting machine. By adjusting the horizontal moving stage and the sliding seat respectively, the relative horizontal distance between the hard material workpiece and the electric cutting machine can be changed, thereby realizing the control of the curvature of the convex or concave arc surface.

[0019] Furthermore, the lifting unit also includes a first scissor lever assembly and a second scissor lever assembly.

[0020] Furthermore, it also includes a first control unit and a second control unit; the first control unit is connected between the drive unit and the clamping unit; the second control unit is connected between the drive unit and the cutting unit; the drive unit can selectively drive the first control unit or the second control unit.

[0021] Furthermore, the first control unit includes a first drive rod, a first drive wheel, and a first rotating shaft; the first drive wheel is connected to the drive unit; one end of the first drive rod is connected to the eccentric position of the first drive wheel, and the other end is connected to the first rotary table of the clamping unit.

[0022] Furthermore, the second control unit includes a second drive rod, a second drive wheel, and a second rotating shaft; the second drive wheel is connected to the drive unit; one end of the second drive rod is connected to the eccentric position of the second drive wheel, and the other end is connected to the second rotary table of the cutting unit.

[0023] The technical solution of this invention can achieve at least one of the following effects: (1) This invention achieves selective control of the relative rotation direction between the hard and brittle material workpiece and the cutting tool by setting a first rotary table of the fixture unit and a second rotary table of the cutting unit: when the first rotary table is fixed and the second rotary table is rotated, an outwardly convex arc surface can be cut; when the second rotary table is fixed and the first rotary table is rotated, an inwardly concave arc surface can be cut. This structural design solves the problem that existing equipment is difficult to flexibly switch between convex and concave arc surface processing modes on the same device, and improves the adaptability of arc surface forming processing.

[0024] (2) By setting up a horizontal moving stage and a sliding seat, the relative position between the hard and brittle material workpiece and the electric cutting machine can be adjusted respectively, thereby controlling the curvature of the cut arc surface. This structure solves the problem that traditional equipment cannot adjust the curvature of the arc surface according to process requirements, realizes the continuous adjustability of the curvature of the convex and concave surfaces, and meets the processing accuracy requirements of various products with different specifications.

[0025] (3) By setting up a lifting unit consisting of a first lifting connecting platform, a second lifting connecting platform, a scissor lever assembly, and a lead screw, the present invention achieves precise height adjustment of the cutting unit relative to the clamping unit. This structure solves the problem that existing devices are difficult to adapt to hard and brittle materials of different thicknesses or different cutting positions, and improves the versatility of the device and the flexibility of cutting positioning.

[0026] (4) By setting up a drive unit, a first control unit, and a second control unit, this invention realizes automated reciprocating rotation control of the fixture unit and the cutting unit, solving the problems of low efficiency and accuracy affected by human factors in manual operation. The introduction of the eccentric wheel mechanism transforms the rotational motion into reciprocating oscillation, providing a stable and controllable cutting trajectory for arc surface forming, further improving processing efficiency and surface quality.

[0027] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0028] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0029] Figure 1 This is a schematic diagram of the overall structure of the arc-shaped cutting device for hard and brittle materials according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the chuck, second rotary table, and lifting unit of the hard and brittle material arc surface forming and cutting device according to Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the horizontal moving stage and the first rotating stage of the hard and brittle material arc surface forming and cutting device according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the assembly structure of the cutting unit and the lifting unit of the hard and brittle material arc surface forming and cutting device according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of the arc-shaped cutting device for hard and brittle materials according to Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the second control unit of the hard and brittle material arc surface forming and cutting device according to Embodiment 2 of the present invention.

[0030] Figure label: 1-Clamping unit; 11-Chuck; 111-Adjusting bolt; 112-First clamping member; 113-Second clamping member; 12-Horizontal moving stage; 121-Moving stage body; 122-Bearing platform; 123-Drive rotating head; 13-First rotating stage; 131-First rotating base; 132-First rotating disk; 133-First rotating connecting platform; 134-First rotating fixing member; 14-Second support platform; 2-Cutting unit; 21-Second rotary table; 211-Second rotating base; 212-Second rotating disk; 213-Second rotating connecting table; 214-First scale indicator table; 22-Sliding seat; 23-Electric cutting machine; 24-Cutting drive motor; 25-Cooling water pipe; 3-Lifting unit; 31-First lifting connecting platform; 32-Second lifting connecting platform; 33-Hand crank; 34-Lead screw; 35-First scissor lift assembly; 351-First scissor arm; 352-Second scissor arm; 36-Second scissor lift assembly; 361-Third scissor arm; 362-Fourth scissor arm; 37-Second scale indicator; 4-First control unit; 41-First drive rod; 42-First drive wheel; 43-First rotating shaft; 5-Second control unit; 51-Second drive rod; 52-Second drive wheel; 53-Second rotating shaft; 54-Driven compensation wheel; 6-Drive unit; 61-Third rotary table; 611-Rotating fixed part; 62-Drive motor; 63-Drive gear; 100 - Device installation platform. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0032] Example 1 This embodiment aims to provide a cutting device for forming curved surfaces of hard and brittle materials, to solve the problem in the prior art of flexibly cutting convex and concave surfaces with different curvature directions on hard and brittle materials. For example... Figure 1 As shown, the hard and brittle material arc surface forming and cutting device includes a clamping unit 1, a cutting unit 2, and a lifting unit 3. The clamping unit 1 is used to clamp and fix the hard and brittle material to be cut. The cutting unit 2 is used to perform the cutting action. The lifting unit 3 is connected between the equipment mounting platform 100 of the hard and brittle material arc surface forming and cutting device and the cutting unit 2. The lifting unit 3 is used to adjust the relative height between the equipment mounting platform 100 and the cutting unit 2 to accommodate hard and brittle materials of different thicknesses or different cutting positions.

[0033] Specifically, the clamping unit 1 includes a chuck 11, a horizontal moving stage 12, a first rotary table 13, and a second support table 14. The chuck 11 is mounted on the horizontal moving stage 12 and is used to clamp a workpiece made of hard material. The horizontal moving stage 12 is mounted on the first rotary table 13 and is used to realize the horizontal movement of the chuck 11 and the workpiece made of hard material. The first rotary table 13 is mounted on the second support table 14, and the second support table 14 provides support for the first rotary table 13. The first rotary table 13 can drive the horizontal moving stage 12 and the chuck 11 to rotate as a whole.

[0034] Furthermore, the chuck 11 includes an adjusting bolt 111, a first clamping member 112, and a second clamping member 113. The first clamping member 112 and the second clamping member 113 are arranged opposite to each other. The adjusting bolt 111 is connected to the first clamping member 112 and the second clamping member 113 respectively. By turning the adjusting bolt 111, the distance between the first clamping member 112 and the second clamping member 113 can be adjusted to achieve clamping and releasing of hard material workpieces of different sizes. The horizontal moving stage 12 includes a moving stage body 121, a support platform 122, and a drive rotating head 123. The support platform 122 is disposed on the moving stage body 121 and is used to mount the chuck 11. The drive rotating head 123 is connected to the moving stage body 121. By operating the drive rotating head 123, the moving stage body 121 can be driven to move horizontally relative to the support platform 122, thereby fine-tuning the position of the hard material workpiece.

[0035] To address the limitations of existing cutting devices in flexibly achieving concave arc forming and the difficulty in adjusting the cutting position, the first rotary table 13 further includes a first rotary base 131, a first rotary disk 132, a first rotary connecting platform 133, and a first rotary fixing member 134. The first rotary base 131 is fixed to the second support platform 14. The first rotary disk 132 is rotatably mounted on the first rotary base 131. The first rotary connecting platform 133 is fixedly connected between the first rotary disk 132 and the bottom of the horizontal moving platform 12. The first rotary fixing member 134 is used to lock the first rotary disk 132 after it has been rotated into position, preventing accidental rotation. By rotating the first rotary disk 132, the horizontal moving platform 12 and the rigid material fixed by the chuck 11 on the horizontal moving platform 12 can be rotated around the vertical axis of the first rotary table 13. The first rotary table 13 enables reciprocating rotation of the workpiece in concave cutting mode, or precise fixing of the workpiece at the required angle in convex cutting mode, significantly improving the flexibility and positioning accuracy of arc forming processing.

[0036] like Figure 1 and Figure 2As shown, the cutting unit 2 includes a second rotary table 21, a sliding seat 22, and an electric cutting machine 23. The second rotary table 21 is disposed on the top of the lifting unit 3. The sliding seat 22 is slidably disposed on the second rotary table 21. The electric cutting machine 23 is fixedly mounted on the sliding seat 22 and is used to cut hard material workpieces.

[0037] Furthermore, the second rotary table 21 includes a second rotary base 211, a second rotary disk 212, a second rotary connecting platform 213, and a first scale indicator 214. The second rotary base 211 is fixed to the top of the lifting unit 3. The second rotary disk 212 is rotatably mounted on the second rotary base 211. The second rotary connecting platform 213 is fixedly connected between the second rotary disk 212 and the bottom of the sliding seat 22. The first scale indicator 214 is mounted on the second rotary base 211 and is used to indicate the rotation angle of the second rotary disk 212. By rotating the second rotary disk 212, the sliding seat 22 and the electric cutting machine 23 on it can be driven to rotate around the vertical axis. The second rotary table 21 is also provided with a rotating fixing component (not shown in the figure) for fixing the second rotary disk 212.

[0038] Furthermore, the cutting unit 2 also includes a cutting drive motor 24 and a cooling water pipe 25. The cutting drive motor 24 is connected to the electric cutting machine 23 to provide power for cutting. The outlet of the cooling water pipe 25 faces the cutting blade of the electric cutting machine 23 and is used for water spraying for cooling and dust removal during the cutting process.

[0039] To address the problem that existing devices are unable to adapt to hard and brittle materials of varying thicknesses or different cutting positions, such as... Figure 2 and Figure 3 As shown, the lifting unit 3 includes a first lifting connecting platform 31, a second lifting connecting platform 32, a hand crank 33, and a lead screw 34. The first lifting connecting platform 31 is fixedly connected to the device mounting platform 100. The second lifting connecting platform 32 is fixedly connected to the second rotating base 211 of the cutting unit 2. The hand crank 33 is located on the side of the lifting unit 3. The lead screw 34 is connected to the hand crank 33. The lifting unit 3 can drive the cutting unit 2 to cut hard and brittle material workpieces at different positions.

[0040] Furthermore, the lifting unit 3 also includes a first scissor lever assembly 35 and a second scissor lever assembly 36. For example... Figure 4As shown, the first scissor lift assembly 35 includes a first scissor lift arm 351 and a second scissor lift arm 352; a first connecting arm is connected to the end of the first scissor lift arm 351 and the end of the second scissor lift arm 352 near the first lifting connecting platform 31, and the first connecting arm is connected to the lead screw 34. The second scissor lift assembly 36 includes a third scissor lift arm 361 and a fourth scissor lift arm 362; a second connecting arm is connected to the end of the third scissor lift arm 361 and the end of the fourth scissor lift arm 362 near the first lifting connecting platform 31, and the second connecting arm is connected to the first lifting connecting platform 31. The first scissor lift arm 351 and the third scissor lift arm 361 are cross-connected, and the second scissor lift arm 352 and the fourth scissor lift arm 36 are cross-connected. The two ends of the first scissor lift assembly 35 and the second scissor lift assembly 36 are respectively connected to the first lifting connecting platform 31 and slidably connected to the second lifting connecting platform 32.

[0041] Specifically, by cranking the hand crank 33, the lead screw 34 is driven to rotate. The lead screw 34 causes a change in the angle between the first scissor lift assembly 35 and the first lifting connecting platform 31, thereby driving the second scissor lift assembly 36 to move synchronously. This adjusts the distance between the first lifting connecting platform 31 and the second lifting connecting platform 32, thus achieving the lifting and lowering of the cutting unit 2 relative to the clamping unit 1. Preferably, the lifting unit 3 further includes a second scale indicator 37 for indicating the current lifting height.

[0042] In this embodiment, a hard material workpiece is clamped by a clamping unit 1, and the cutting height is adjusted by a lifting unit 3. When the first rotary table 13 of the clamping unit 1 is fixed and only the second rotary table 21 of the cutting unit 2 is rotated, an outwardly convex arc surface can be cut; conversely, when the second rotary table 21 of the cutting unit 2 is fixed and only the first rotary table 13 of the clamping unit 1 is rotated, an inwardly concave arc surface can be cut. Adjusting the horizontal moving table 12 and the sliding seat 22 can adjust the distance between the hard material workpiece and the electric cutting machine 23, thereby controlling the curvature of the cut outwardly convex and inwardly concave arc surfaces. This structural design provides cutting modes for both outwardly convex and inwardly concave arc surfaces, improving the processing flexibility of the device.

[0043] Example 2 To address the issues of low efficiency in manual operation, cutting accuracy being affected by operator experience, and low automation of the device, this embodiment improves upon embodiment 1 by adding a first control unit 4, a second control unit 5, and a drive unit 6. These components enable automated control of the cutting process and facilitate reciprocating cutting motion to produce curved surfaces with different curvatures.

[0044] Specifically, such as Figure 5As shown, the drive unit 6 includes a third rotary table 61, a drive motor 62, and a drive gear 63. The third rotary table 61 is fixed on the device mounting platform 100; the drive motor 62 is mounted on the third rotary table 61. The drive gear 63 is connected to the output shaft of the drive motor 62 and is driven to rotate by the drive motor 62. The third rotary table 61 can adjust the orientation of the drive motor 62 and the drive gear 63.

[0045] Specifically, such as Figure 6 As shown, the first control unit 4 is used to control the rotation of the clamping unit 1. The first control unit 4 includes a first drive rod 41, a first drive wheel 42, and a first rotating shaft 43. The first drive wheel 42 rotates around the first rotating shaft 43, which is located at the center of the first drive wheel 42. The first drive wheel 42 meshes with the drive gear 63 of the drive unit 6. One end of the first drive rod 41 is connected to the eccentric position shaft of the first drive wheel 42, and the other end of the first drive rod 41 is connected to the first rotating table 13 of the clamping unit 1.

[0046] Furthermore, when the drive gear 63 meshes with the first drive wheel 42 and drives the first drive wheel 42 to rotate, since the first drive rod 41 is connected to the eccentric position of the first drive wheel 42, the rotational motion of the first drive wheel 42 is converted into the reciprocating swing of the first drive rod 41, thereby driving the first rotary table 13 to reciprocate, thus realizing the reciprocating rotation of the hard material workpiece within a certain angle range. Combined with the position of the cutting unit 2, a concave surface can be processed.

[0047] Specifically, the second control unit 5 is used to control the rotation of the cutting unit 2. The second control unit 5 includes a second drive rod 51, a second drive wheel 52, a second rotating shaft 53, and a driven compensation wheel 54. The second drive wheel 52 rotates around the second rotating shaft 53, which is located at the center of the second drive wheel 52. The second drive wheel 52 meshes with the drive gear 63 of the drive unit 6.

[0048] Furthermore, the driven compensating wheel 54 is arranged adjacent to and meshes with the second driving wheel 52 to ensure smooth transmission and increase the meshing arc length. One end of the second driving rod 51 is connected to the eccentric position of the second driving wheel 52, and the other end of the second driving rod 51 is connected to the second rotary table 21 of the cutting unit 2. When the driving gear 63 meshes with the driven compensating wheel 54 and drives the second driving wheel 52 to rotate, since the second driving rod 51 is connected to the eccentric position of the second driving wheel 52, the rotational motion of the second driving wheel 52 is converted into the reciprocating oscillation of the second driving rod 51, which in turn drives the second rotary table 21 to reciprocate, thereby realizing the reciprocating rotation of the electric cutting machine 23 within a certain angle range. With the help of a fixed hard material workpiece, a convex surface can be processed.

[0049] In this embodiment, the drive unit 6 selectively drives either the first control unit 4 or the second control unit 5, enabling automated concave or convex surface cutting. An eccentric wheel mechanism converts continuous rotational motion into oscillating motion, providing a reciprocating cutting trajectory for curved surface forming.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for forming and cutting arc surfaces of hard and brittle materials, characterized in that, It includes a clamping unit (1), a cutting unit (2), and a lifting unit (3); The clamping unit (1) includes a chuck (11), a horizontal moving stage (12), and a first rotating stage (13); the chuck (11) is disposed on the horizontal moving stage (12) and is used to clamp hard and brittle materials; the horizontal moving stage (12) is disposed on the first rotating stage (13); the first rotating stage (13) can drive the horizontal moving stage (12) and the chuck (11) to rotate as a whole; The cutting unit (2) is used to cut hard and brittle material workpieces; The lifting unit (3) is connected between the device mounting platform (100) and the cutting unit (2) and is used to adjust the relative height between the device mounting platform (100) and the cutting unit (2).

2. The arc-shaped cutting device for hard and brittle materials according to claim 1, characterized in that, The cutting unit (2) includes a sliding seat (22) and an electric cutter (23).

3. The arc-shaped cutting device for hard and brittle materials according to claim 1, characterized in that, The horizontal moving stage (12) includes a moving stage body (121), a support platform (122), and a drive rotating head (123).

4. The arc-shaped cutting device for hard and brittle materials according to claim 3, characterized in that, The support platform (122) is disposed on the mobile platform (121); the drive rotating head (123) is connected to the mobile platform (121).

5. The arc-shaped cutting device for hard and brittle materials according to claim 1, characterized in that, The first rotary table (13) includes a first rotary base (131), a first rotary disk (132) and a first rotary connecting table (133).

6. The arc-shaped cutting device for hard and brittle materials according to claim 5, characterized in that, The first rotating disk (132) is rotatably mounted on the first rotating base (131), and the first rotating connecting platform (133) is connected to the first rotating disk (132).

7. The arc-shaped cutting device for hard and brittle materials according to claim 1, characterized in that, The lifting unit (3) includes a first lifting connecting platform (31) and a second lifting connecting platform (32), and the second lifting connecting platform (32) is connected to the cutting unit (2).

8. The arc-shaped cutting device for hard and brittle materials according to claim 1, characterized in that, The lifting unit (3) also includes a hand crank (33) and a lead screw (34); the hand crank (33) is located on the side of the lifting unit (3), and the lead screw (34) is connected to the hand crank (33).

9. The arc-shaped cutting device for hard and brittle materials according to claim 1, characterized in that, The cutting unit (2) also includes a cutting drive motor (24) and a cooling water injection pipe (25).

10. The arc-shaped cutting device for hard and brittle materials according to claim 1, characterized in that, It also includes a drive unit (6), which is disposed on the device mounting platform (100) and is used to provide rotational power.

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