A polishing apparatus for surface processing of mechanical parts

Abstract

The application discloses a kind of polishing equipment of mechanical component surface processing, and the application relates to component processing technical field, including base, the outer surface of base is fixedly connected with first support rod, the end of first support rod away from base is fixedly connected with first fixed block, the outer surface of first fixed block is fixedly connected with shell, the upper surface of shell is fixedly connected with limit rod, the setting of limit rod can limit polishing device, so that polishing device can be connected together with shell;Rotary device, by setting rotary device, the effect of rotation can be generated, and then the mechanical parts that need to be polished can be rotated at high speed, and then cooperate with polishing device, so as to complete the polishing work of mechanical parts, the rotary device includes servo motor, the servo motor is fixedly connected in the inner cavity of base, to the effect of clamping and polishing of different sizes of components.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of part processing, in particular to a polishing equipment for surface processing of mechanical parts. BACKGROUND

[0002] Polishing refers to the use of mechanical, chemical or electrochemical effects to reduce the roughness of the workpiece surface to obtain a smooth, flat surface. Polishing is a modification process using polishing tools and abrasive particles or other polishing media on the surface of the workpiece. Polishing cannot improve the size accuracy or geometric shape accuracy of the workpiece, but is intended to obtain a smooth surface or mirror finish. Sometimes it is also used to eliminate gloss (matte). Usually, the polishing wheel is used as the polishing tool. The polishing wheel is generally made of multiple layers of canvas, felt or leather, and is clamped on both sides with metal plates. The rim is coated with a polishing agent made by uniformly mixing fine abrasive and oil. During polishing, the high-speed rotating polishing wheel (with a peripheral speed of more than 20 meters per second) is pressed against the workpiece, causing the abrasive to roll and cut the workpiece surface slightly, thereby obtaining a shiny processed surface with a surface roughness of Ra0.63~0.01 microns. When using non-oil matte polishing agent, the shiny surface can be matte to improve appearance. When producing large quantities of bearing steel balls, the drum polishing method is often used.

[0003] When polishing parts, the parts need to be clamped and the outer surface of the parts needs to be polished. The polishing device on the market can only clamp the parts and then polish the parts by hand when polishing due to the inconsistent size of the parts. SUMMARY

[0004] To achieve the above purpose, the present application is implemented by the following technical scheme: a polishing equipment for surface processing of mechanical parts, comprising a base, a first support rod is fixedly connected to the outer surface of the base, a first fixed block is fixedly connected to the end of the first support rod away from the base, an outer shell is fixedly connected to the outer surface of the first fixed block, a limiting rod is fixedly connected to the upper surface of the outer shell. The limiting rod can limit the polishing device, so that the polishing device can be connected with the outer shell.

[0005] A rotating device is provided, which can produce a rotating effect, so that the mechanical parts that need to be polished can rotate at high speed, and then cooperate with the polishing device to complete the polishing work of the mechanical parts. The rotating device comprises a servo motor, the servo motor is fixedly connected in the inner cavity of the base, and the output end of the servo motor is fixedly connected with a rotating column. The servo motor can produce a rotating effect, so that the rotating column starts to rotate.

[0006] The polishing device can polish the mechanical parts after clamping, and the tightness of polishing can be adjusted, so that the polishing and grinding work of mechanical parts of different sizes can be completed. The polishing device comprises a limiting plate, a circular hole is formed in the lower surface of the limiting plate, the circular hole is frictionally matched with a limiting rod, and the upper surface of the limiting plate is fixedly connected with a blocking cover. The limiting plate and the circular hole can cooperate with the limiting rod, so that the polishing device is fixed in position.

[0007] Preferably, the outer surface of the rotating column is fixedly connected with a second support rod, the end of the second support rod is fixedly connected with a second fixed block, the inner wall of the shell is fixedly connected with a third support rod, and the end of the third support rod is fixedly connected with a circular ring. The circular ring can limit the limiting sleeve, so that the limiting sleeve can rotate on the outer surface of the circular ring.

[0008] Preferably, the outer surface of the circular ring is rotatably connected with a limiting sleeve, the outer surface of the limiting sleeve is fixedly connected with a fourth support rod, and the limiting sleeve and the fourth support rod are arranged. The placing device can rotate on the outer surface of the circular ring, so that the mechanical parts to be polished can rotate. The end of the fourth support rod is fixedly connected with a placing device, the placing device comprises a placing box, the placing box is fixedly connected to the end of the fourth support rod, and the lower surface of the placing box is fixedly connected to the end of the second fixed block.

[0009] Preferably, the inner cavity of the placing box is fixedly connected with a first threaded frame, the inner ring of the first threaded frame is threadedly connected with a first threaded rod, and the bottom end of the first threaded rod is fixedly connected with a first rotating handle. The first rotating handle can rotate the first threaded rod in the inner cavity of the first threaded frame, thereby adjusting the position of the placing plate.

[0010] Preferably, the top end of the first threaded rod is fixedly connected with a placing plate, the upper surface of the placing plate is fixedly connected with a first soft pad, the lower surface of the placing plate is fixedly connected with a third fixed block, the bottom surface of the inner cavity of the placing box is fixedly connected with a fixed ring, the upper surface of the fixed ring is fixedly connected with a first spring, and the top end of the first spring is fixedly connected to the lower surface of the third fixed block. The first spring can press the placing plate, and the material of the placing plate is a material with certain elasticity and softness, so that the first soft pad can wrap the bottom of the mechanical parts to be polished when it is pressed.

[0011] Preferably, the upper surface of the placement box is fixedly connected with a part clamping device, the part clamping device comprises a fixed frame, the fixed frame is fixedly connected to the upper surface of the placement box, and the upper surface of the fixed frame is provided with a clamping groove.

[0012] Preferably, the inner cavity of the fixed frame is movably connected with a moving rod, the upper surface of the moving rod is fixedly connected with a fifth supporting rod, the end of the fifth supporting rod is fixedly connected with an elastic rod, the bottom end of the elastic rod is fixedly connected with a limiting block, the limiting block is in extrusion fit with the clamping groove, and the limiting block is arranged to keep the moving rod and the fixed frame relatively stationary, so that the clamping plate is kept fixed.

[0013] Preferably, the end of the moving rod is fixedly connected with a clamping plate, the outer surface of the clamping plate is fixedly connected with a second soft pad, the number of the second soft pad is several, the upper surface of the clamping plate is fixedly connected with a fourth fixed block, and the upper surface of the fourth fixed block is fixedly connected with an anti-skid pad.

[0014] Preferably, the bottom surface of the inner cavity of the barrier cover is fixedly connected with a fixed rod, the bottom end of the fixed rod is fixedly connected with a top cover, the lower surface of the top cover is fixedly connected with a third soft pad, the outer surface of the third soft pad is fixedly connected with a first polishing plate, the axial center of the lower surface of the top cover is fixedly connected with a second polishing plate, and the top cover, the first polishing plate and the second polishing plate are arranged to polish the upper surface of the part.

[0015] Preferably, the inner wall of the barrier cover is fixedly connected with a side polishing device, the side polishing device is arranged to polish and polish the side surface of the part, the side polishing device comprises a second threaded frame, the second threaded frame is fixedly connected to the inner wall of the barrier cover, the inner cavity of the second threaded frame is threadedly connected with a second threaded rod, one end of the second threaded rod away from the inner cavity of the barrier cover is fixedly connected with a second rotating handle, the second threaded rod and the second threaded frame are arranged to change the position of the arc-shaped plate, the other end of the second threaded rod away from the second rotating handle is fixedly connected with a fixed plate, the outer surface of the fixed plate is fixedly connected with an arc-shaped plate, the outer surface of the arc-shaped plate is fixedly connected with a fourth soft pad, the outer surface of the fourth soft pad is fixedly connected with a third polishing plate, and the end of the arc-shaped plate is fixedly connected with a brush strip.

[0016] The application provides a polishing equipment for surface processing of mechanical parts.

[0017] I. The polishing equipment for surface processing of mechanical parts can produce rotating effect through the rotating device, and then the mechanical parts to be polished can produce high-speed rotation, and then cooperate with the polishing device to complete the polishing work of the mechanical parts.

[0018] II. The polishing equipment for surface processing of mechanical parts can polish the mechanical parts after clamping, and can adjust the tightness of polishing, so as to complete the polishing and grinding work of mechanical parts of different sizes. The limiting plate and the circular hole can cooperate with the limiting rod to fix the position of the polishing device.

[0019] III. The polishing equipment for surface processing of mechanical parts can extrude the placing plate through the first spring. The material of the placing plate is a material with certain elasticity and softness, so that the first soft pad can wrap the bottom of the mechanical part to be polished when extruding.

[0020] IV. The polishing equipment for surface processing of mechanical parts can clamp the parts after placing, so as to prevent the parts from deviating when polishing the parts. The limiting block can keep the moving rod and the fixed frame relatively stationary, so as to keep the clamping plate fixed.

[0021] V. The polishing equipment for surface processing of mechanical parts can polish and grind the side surface of the part through the side grinding device. The second threaded rod and the second threaded frame can change the position of the arc-shaped plate. The third polishing plate can polish the outer surface of the metal part. The brush strip can brush the slag generated by polishing. DETAILED DESCRIPTION

[0022] Figure 1 It is an external structure diagram of the polishing equipment for surface processing of mechanical parts.

[0023] Figure 2 It is a disassembled structure diagram of the application.

[0024] Figure 3 It is a rotating device structure diagram of the application.

[0025] Figure 4 It is a placing device structure diagram of the application.

[0026] Figure 5 It is a part clamping device structure diagram of the application.

[0027] Figure 6 It is the schematic view of partial structure of part clamping device of the present application;

[0028] Figure 7 It is the schematic view of structure of polishing device of the present application;

[0029] Figure 8 It is the schematic view of structure of side polishing device of the present application.

[0030] In the figure: 1, base; 2, first support rod; 3, first fixed block; 4, shell; 5, rotating device; 6, part clamping device; 7, limiting rod; 8, polishing device; 51, servo motor; 52, rotating column; 53, second support rod; 54, second fixed block; 55, placing device; 56, third support rod; 57, circular ring; 58, limiting sleeve; 59, fourth support rod; 551, placing box; 552, first threaded frame; 553, first threaded rod; 554, first rotating handle; 555, placing plate; 556, first soft pad; 557, third fixed block; 558, fixed ring; 559, first spring; 61, fixed frame; 62, moving rod; 63, fifth support rod; 64, elastic rod; 65, limiting block; 66, clamping groove; 67, clamping plate; 68, second soft pad; 69, fourth fixed block; 610, non-slip pad; 81, limiting plate; 82, circular hole; 83, blocking cover; 84, fixed rod; 85, top cover; 86, third soft pad; 87, first polishing plate; 88, second polishing plate; 89, side polishing device; 891, second threaded frame; 892, second threaded rod; 893, second rotating handle; 894, fixed plate; 895, arc plate; 896, fourth soft pad; 897, third polishing plate; 898, brush strip. DETAILED DESCRIPTION

[0031] The application will be further described below in conjunction with the drawings and specific embodiments. The embodiments of the present application are given for illustration and description only, and are not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

[0032] The first embodiment, as Figures 1-4As shown, the present application provides a technical scheme: a kind of polishing equipment for mechanical parts surface processing, including base 1, the outer surface of the base 1 is fixedly connected with first support rod 2, the end of the first support rod 2 away from base 1 is fixedly connected with first fixed block 3, the outer surface of the first fixed block 3 is fixedly connected with shell 4, the upper surface of the shell 4 is fixedly connected with limiting rod 7, limiting rod 7 can be positioned, so that polishing device 8 can be connected together with shell 4;

[0033] Rotary device 5, by setting rotary device 5, can produce the effect of rotation, in turn make the mechanical parts that need to be polished can produce high-speed rotation, in turn cooperate with polishing device 8, thereby completing the polishing work of mechanical parts, the rotary device 5 includes servo motor 51, the servo motor 51 is fixedly connected in the inner cavity of base 1, the output end of the servo motor 51 is fixedly connected with rotating column 52, servo motor 51 can produce the effect of rotation, so that rotating column 52 starts to rotate;

[0034] Polishing device 8, by setting polishing device 8, can polish the mechanical parts after clamping and can adjust the tightness of polishing, so as to complete the polishing and grinding work of different size mechanical parts, the polishing device 8 includes limiting plate 81, the lower surface of the limiting plate 81 is provided with circular hole 82, the circular hole 82 is frictionally fitted with limiting rod 7, the upper surface of the limiting plate 81 is fixedly connected with barrier cover 83, limiting plate 81 and circular hole 82 can be cooperated with limiting rod 7, so that polishing device 8 is fixed in position.

[0035] The outer surface of the rotating column 52 is fixedly connected with a second support rod 53, the end of the second support rod 53 is fixedly connected with a second fixed block 54, the inner wall of the shell 4 is fixedly connected with a third support rod 56, the end of the third support rod 56 is fixedly connected with a circular ring 57, the setting of the circular ring 57 can limit the limiting sleeve 58, so that the limiting sleeve 58 can rotate on the outer surface of the circular ring 57, the outer surface of the circular ring 57 is rotatably connected with the limiting sleeve 58, the outer surface of the limiting sleeve 58 is fixedly connected with a fourth support rod 59, the setting of the limiting sleeve 58 and the fourth support rod 59 can make the placing device 55 rotate on the outer surface of the circular ring 57, so that the mechanical parts that need to be polished can rotate, the end of the fourth support rod 59 is fixedly connected with the placing device 55, the placing device 55 comprises a placing box 551, the placing box 551 is fixedly connected to the end of the fourth support rod 59, the lower surface of the placing box 551 is fixedly connected to the end of the second fixed block 54, in use, after the mechanical parts that need to be polished are clamped, the servo motor 51 is connected to the power supply and the switch of the servo motor 51 is turned on, the servo motor 51 starts to work, thereby driving the rotating column 52 to rotate, and further making the placing device 55 rotate on the outer surface of the circular ring 57 under the action of the limiting sleeve 58.

[0036] The inner cavity of the placing box 551 is fixedly connected with a first threaded frame 552, the inner ring of the first threaded frame 552 is threadedly connected with a first threaded rod 553, the bottom end of the first threaded rod 553 is fixedly connected with a first rotating handle 554, the setting of the first rotating handle 554 can make the first threaded rod 553 rotate in the inner cavity of the first threaded frame 552, thereby adjusting the position of the placing plate 555, the top end of the first threaded rod 553 is fixedly connected with the placing plate 555, the upper surface of the placing plate 555 is fixedly connected with a first soft pad 556, the lower surface of the placing plate 555 is fixedly connected with a third fixed block 557, the bottom surface of the inner cavity of the placing box 551 is fixedly connected with a fixed ring 558, the upper surface of the fixed ring 558 is fixedly connected with a first spring 559, the top end of the first spring 559 is fixedly connected to the lower surface of the third fixed block 557, the setting of the first spring 559 can extrude the placing plate 555, the material of the placing plate 555 is a material with certain elasticity and softness, so that the first soft pad 556 can wrap the bottom of the mechanical parts that need to be polished when extruding, in use, the operator places the mechanical parts that need to be polished directly above the placing plate 555, and rotates the first rotating handle 554, so that the first threaded rod 553 rotates in the inner cavity of the first threaded frame 552, thereby making the placing plate 555 move downward, in the process of moving, the first spring 559 extrudes the placing plate 555, thereby wrapping the bottom end of the mechanical parts that need to be polished.

[0037] The second embodiment, as shown in Figures 5-6 The upper surface of the placing box 551 is fixedly connected with a part clamping device 6. The part clamping device 6 comprises a fixed frame 61 fixedly connected to the upper surface of the placing box 551. The upper surface of the fixed frame 61 is provided with a clamping groove 66. The part clamping device 6 can clamp the placed parts, so as to prevent the parts from deviating when polishing the parts. A moving rod 62 is movably connected in the inner cavity of the fixed frame 61. The upper surface of the moving rod 62 is fixedly connected with a fifth supporting rod 63. The end of the fifth supporting rod 63 is fixedly connected with an elastic rod 64. The bottom end of the elastic rod 64 is fixedly connected with a limiting block 65. The limiting block 65 is in abutting fit with the clamping groove 66. The limiting block 65 can keep the moving rod 62 and the fixed frame 61 relatively stationary, so as to keep the clamping plate 67 fixed. The end of the moving rod 62 is fixedly connected with a clamping plate 67. The outer surface of the clamping plate 67 is fixedly connected with a second soft pad 68. The number of the second soft pad 68 is several. The upper surface of the clamping plate 67 is fixedly connected with a fourth fixed block 69. The upper surface of the fourth fixed block 69 is fixedly connected with an anti-skid pad 610. The second soft pad 68 and the anti-skid pad 610 can increase the friction force on the outer surface of the parts when clamping the outer surface of the metal parts. In use, after the parts are placed, the operator moves the moving rod 62 in the inner cavity of the fixed frame 61, and clamps the outer surface of the metal parts by the clamping plate 67, the second soft pad 68 and the anti-skid pad 610. After clamping, the limiting block 65 is clamped in the inner cavity of the clamping groove 66, so as to keep the clamping plate 67 stationary.

[0038] The third embodiment, as shown in Figures 7-8As shown, the bottom surface of the inner cavity of the barrier cover 83 is fixedly connected with a fixed rod 84, the bottom end of the fixed rod 84 is fixedly connected with a top cover 85, the lower surface of the top cover 85 is fixedly connected with a third soft pad 86, the outer surface of the third soft pad 86 is fixedly connected with a first polishing plate 87, the axial center of the lower surface of the top cover 85 is fixedly connected with a second polishing plate 88, the setting of the top cover 85, the first polishing plate 87 and the second polishing plate 88 can polish the upper surface of the part, the inner wall of the barrier cover 83 is fixedly connected with a side polishing device 89, through the setting of the side polishing device 89, the side surface of the part can be polished and polished, the side polishing device 89 includes a second threaded frame 891, the second threaded frame 891 is fixedly connected at the inner wall of the barrier cover 83, the inner cavity of the second threaded frame 891 is threadedly connected with a second threaded rod 892, the end, away from the inner cavity of the barrier cover 83, of the second threaded rod 892 is fixedly connected with a second rotating handle 893, the setting of the second threaded rod 892 and the second threaded frame 891 can change the position of the arc-shaped plate 895, the end, away from the second rotating handle 893, of the second threaded rod 892 is fixedly connected with a fixed plate 894, the outer surface of the fixed plate 894 is fixedly connected with an arc-shaped plate 895, the outer surface of the arc-shaped plate 895 is fixedly connected with a fourth soft pad 896, the outer surface of the fourth soft pad 896 is fixedly connected with a third polishing plate 897, the end of the arc-shaped plate 895 is fixedly connected with a brush strip 898, the setting of the third polishing plate 897 can polish the outer surface of the metal part, the setting of the brush strip 898 can brush the slag generated by polishing, in use, the operator aligns the circular hole 82 with the limiting rod 7, presses the device, after the device is installed, rotates the second threaded rod 892, moves the arc-shaped plate 895 to the outer surface of the metal part, and when the third polishing plate 897 contacts the outer surface of the part.

[0039] Obviously, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art and related fields without creative work shall belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if not specially described and limited, are implemented according to the conventional means in the art.

Claims

1. A polishing device for mechanical component surface processing, comprising a base (1), the outer surface of the base (1) is fixedly connected with a first supporting rod (2), the end of the first supporting rod (2) away from the base (1) is fixedly connected with a first fixed block (3), the outer surface of the first fixed block (3) is fixedly connected with a shell (4), the upper surface of the shell (4) is fixedly connected with a limiting rod (7), characterized in that: The polishing device for mechanical component surface processing further comprises: a rotating device (5), the rotating device (5) comprises a servo motor (51), the servo motor (51) is fixedly connected in the inner cavity of the base (1), the output end of the servo motor (51) is fixedly connected with a rotating column (52); a polishing device (8), the polishing device (8) comprises a limiting plate (81), the lower surface of the limiting plate (81) is provided with a circular hole (82), the circular hole (82) is frictionally matched with the limiting rod (7), the upper surface of the limiting plate (81) is fixedly connected with a barrier cover (83); the outer surface of the rotating column (52) is fixedly connected with a second supporting rod (53), the end of the second supporting rod (53) is fixedly connected with a second fixed block (54), the inner wall of the shell (4) is fixedly connected with a third supporting rod (56), the end of the third supporting rod (56) is fixedly connected with a circular ring (57); the bottom surface of the inner cavity of the barrier cover (83) is fixedly connected with a fixed rod (84), the bottom end of the fixed rod (84) is fixedly connected with a top cover (85), the lower surface of the top cover (85) is fixedly connected with a third soft pad (86), the outer surface of the third soft pad (86) is fixedly connected with a first polishing plate (87), the shaft center of the lower surface of the top cover (85) is fixedly connected with a second polishing plate (88); the inner wall of the barrier cover (83) is fixedly connected with a side polishing device (89), the side polishing device (89) comprises a second threaded frame (891), the second threaded frame (891) is fixedly connected at the inner wall of the barrier cover (83), the inner cavity of the second threaded frame (891) is threadedly connected with a second threaded rod (892), the end of the second threaded rod (892) away from the inner cavity of the barrier cover (83) is fixedly connected with a second rotating handle (893), the end of the second threaded rod (892) away from the second rotating handle (893) is fixedly connected with a fixed plate (894), the outer surface of the fixed plate (894) is fixedly connected with an arc-shaped plate (895); the outer surface of the arc-shaped plate (895) is fixedly connected with a fourth soft pad (896), the outer surface of the fourth soft pad (896) is fixedly connected with a third polishing plate (897), the end of the arc-shaped plate (895) is fixedly connected with a brush strip (898).

2. A polishing apparatus for surface finishing of mechanical parts as claimed in claim 1 wherein: The outer surface of the circular ring (57) is rotatably connected with a limiting sleeve (58), the outer surface of the limiting sleeve (58) is fixedly connected with a fourth supporting rod (59), the end of the fourth supporting rod (59) is fixedly connected with a placing device (55), the placing device (55) comprises a placing box (551), the placing box (551) is fixedly connected at the end of the fourth supporting rod (59), and the lower surface of the placing box (551) is fixedly connected at the end of the second fixed block (54).

3. A polishing apparatus for surface finishing of mechanical parts as claimed in claim 2 wherein: The inner cavity of the placing box (551) is fixedly connected with a first threaded frame (552), the inner circle of the first threaded frame (552) is threadedly connected with a first threaded rod (553), and the bottom end of the first threaded rod (553) is fixedly connected with a first rotating handle (554).

4. The polishing apparatus for surface processing of mechanical parts according to claim 3, wherein: The top end of the first threaded rod (553) is fixedly connected with a placing plate (555), the upper surface of the placing plate (555) is fixedly connected with a first soft pad (556), the lower surface of the placing plate (555) is fixedly connected with a third fixed block (557), the bottom surface of the inner cavity of the placing box (551) is fixedly connected with a fixed ring (558), the upper surface of the fixed ring (558) is fixedly connected with a first spring (559), and the top end of the first spring (559) is fixedly connected to the lower surface of the third fixed block (557).

5. A polishing apparatus for surface finishing of mechanical parts as claimed in claim 4 wherein: The upper surface of the placing box (551) is fixedly connected with a part clamping device (6), the part clamping device (6) comprises a fixed frame (61), the fixed frame (61) is fixedly connected to the upper surface of the placing box (551), and the upper surface of the fixed frame (61) is provided with a clamping groove (66).

6. A polishing apparatus for surface finishing of mechanical parts as claimed in claim 5 wherein: The inner cavity of the fixed frame (61) is movably connected with a moving rod (62), the upper surface of the moving rod (62) is fixedly connected with a fifth supporting rod (63), the end of the fifth supporting rod (63) is fixedly connected with an elastic rod (64), the bottom end of the elastic rod (64) is fixedly connected with a limiting block (65), and the limiting block (65) is in extrusion fit with the clamping groove (66).

7. A polishing apparatus for surface finishing of mechanical parts as claimed in claim 6 wherein: The end of the moving rod (62) is fixedly connected with a clamping plate (67), the outer surface of the clamping plate (67) is fixedly connected with a second soft pad (68), the number of the second soft pad (68) is several, the upper surface of the clamping plate (67) is fixedly connected with a fourth fixed block (69), and the upper surface of the fourth fixed block (69) is fixedly connected with an anti-skid pad (610).

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