Turnover device for optical lens glass sample plate hand repair machine

Abstract

The utility model discloses a turn-over device for an optical lens glass sample plate hand repair machine in the technical field of hand repair machines, which comprises a bottom plate, a vertical plate is fixedly connected to the rear side of the top of the bottom plate, stretching grooves are formed in the upper sides of the left side and the right side of the front side wall of the vertical plate, and stretching rods are inserted into inner cavities of the stretching grooves. The outer side walls of the stretching rods are sleeved with reset springs, the tail ends of the two stretching rods extend to the outer sides of the stretching grooves to be fixedly connected with a transverse plate, sliding grooves are formed in the left side and the right side of the bottom of the transverse plate, blocking blocks are slidably connected to inner cavities of the sliding grooves, and gaskets are arranged at the tops of the blocking blocks. The turnover device for the optical lens glass sample plate hand repair machine is reasonable in structural design, the situation that the optical lens glass sample plate is damaged due to excessive clamping when the optical lens glass sample plate is clamped and fixed can be avoided, and the optical lens glass sample plate can be turned over.

Description

Technical Field

[0001] The utility model relates to the technical field of hand-held repair machines, in particular to a turning device for an optical lens glass sample hand-held repair machine. Background Art

[0002] Optical lenses are essential components in machine vision systems, which directly affect the quality of imaging and the implementation and effect of algorithms. Optical lenses can be divided into short-focus lenses, medium-focus lenses, and long-focus lenses based on focal length; wide-angle, standard, and telephoto lenses based on field of view; and fixed-aperture fixed-focus lenses, manual-aperture fixed-focus lenses, automatic-aperture fixed-focus lenses, manual-zoom lenses, automatic-zoom lenses, automatic-aperture electric-zoom lenses, and electric three-variable lenses based on structure.

[0003] When the optical lens glass sample becomes blurred or scratched, it is usually polished and repaired with a hand repair machine and abrasives. In order to avoid slipping during polishing, the optical lens is usually fixed by clamping. Sometimes, excessive clamping may damage the optical lens glass sample, and after polishing one side, it needs to be removed and manually turned over and fixed, which is very troublesome to use. For this reason, we propose a flipping device for a hand repair machine for optical lens glass samples. Utility Model Content

[0004] The purpose of the utility model is to provide a flipping device for an optical lens glass sample hand repair machine, so as to solve the problem proposed in the above background technology that in order to avoid sliding during polishing of the optical lens, it is usually fixed by clamping, and sometimes excessive clamping may damage the optical lens glass sample during clamping, and after completing the grinding of one side, it needs to be removed and manually flipped over and fixed, which is very troublesome to use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flipping device for an optical lens glass sample hand repair machine, comprising a bottom plate, a vertical plate fixedly connected to the top rear side of the bottom plate, stretching grooves are opened on the upper sides of the left and right sides of the front side walls of the vertical plate, a stretching rod is inserted into the inner cavity of the stretching groove, a return spring is sleeved on the outer wall of the stretching rod, the ends of the two stretching rods extend to the outside of the stretching groove and are fixedly connected to a horizontal plate, sliding grooves are opened on the left and right sides of the bottom of the horizontal plate, a blocking block is slidably connected to the inner cavity of the sliding groove, a gasket is provided on the top of the blocking block, the bottom of the blocking block extends to the outside of the horizontal plate, and the rear side wall of the blocking block is slidably connected to the front side wall of the vertical plate.

[0006] As a further description of the above technical solution:

[0007] A clamping groove is opened on the upper side of the front side wall of the vertical plate, and the clamping groove is located below the horizontal plate. Positioning holes are opened on the upper sides of the left and right sides of the front side wall of the vertical plate, and the positioning holes are evenly distributed from the outside to the inside. The positioning holes are arranged in two rows, and the two rows of positioning holes are respectively located on the upper and lower sides of the clamping groove. Positioning columns are inserted into the inner cavities of the positioning holes on the upper and lower sides of the left and right sides, and the ends of the positioning columns on the upper and lower sides of the left and right sides are respectively fixedly connected to the upper and lower sides of the rear side walls of the left and right blocking blocks.

[0008] As a further description of the above technical solution:

[0009] A servo motor is fixedly connected to the upper side of the right side wall of the vertical plate by bolts, and a bidirectional screw rod is rotatably connected to the left side wall of the clamping groove by a bearing, and the end of the bidirectional screw rod is fixedly connected to the output shaft of the servo motor, and clamping plates are screwed on the left and right sides of the outer wall of the bidirectional screw rod, and the clamping plate is located on the outer side of the blocking block, and a hollow support block is fixedly connected to the lower side of the front side wall of the clamping plate, and a rotating rod is rotatably connected to the front sides of the left and right side walls of the inner cavity of the hollow support block by bearings, and a gear is fixedly connected to the outer side wall of the rotating rod, and the end of the rotating rod extends to the inner side of the hollow support block and is fixedly connected to the clamping block, and the inner wall of the clamping block is provided with an anti-slip gasket.

[0010] As a further description of the above technical solution:

[0011] : A toothed plate is meshed on the top of the gear, a sliding rod is inserted on the top of the toothed plate, the front end and the end of the sliding rod are respectively fixedly connected to the front and rear side walls of the inner cavity of the hollow support block, the rear side wall of the toothed plate is fixedly connected to the first electric telescopic rod, and the end of the first electric telescopic rod is fixedly connected to the rear side wall of the inner cavity of the hollow support block.

[0012] As a further description of the above technical solution:

[0013] A moving wheel is fixedly connected to the front side of the bottom of the hollow support block, and the bottom of the moving wheel is slidably connected to the top of the bottom plate.

[0014] As a further description of the above technical solution:

[0015] A mounting groove is provided in the middle of the top front side of the base plate, a second electric telescopic rod is fixedly connected to the bottom of the inner cavity of the mounting groove, a tip of the second electric telescopic rod extends to the outside of the mounting groove and is fixedly connected to a grinding table, a gasket is provided on the top of the grinding table, an L-shaped plate is slidably connected to the rear side wall of the grinding table, and the bottom of the L-shaped plate is fixedly connected to the top of the base plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The optical lens glass sample hand repair machine uses a flipping device, which pulls the horizontal plate, and the movement of the horizontal plate drives the stretching rod and the blocking block to move. The movement of the stretching rod drives the resetting spring to contract, and the movement of the blocking block drives the positioning column to disengage from the positioning hole. The blocking blocks on both sides are moved to the positions that need to be adjusted. The horizontal plate is released, and the resetting spring rebounds to drive the stretching rod to reset and then drive the horizontal plate to reset. When the horizontal plate is reset, it drives the blocking block to move and then drives the positioning column to insert into the corresponding positioning hole. This can avoid the situation where the optical lens glass sample is damaged by excessive clamping when it is clamped and fixed.

[0018] 2. The flipping device for the optical lens glass sample hand repair machine starts the servo motor, the second electric telescopic rod and the first electric telescopic rod respectively through an external controller, the output shaft of the servo motor rotates to drive the bidirectional screw to rotate, the bidirectional screw rotates to drive the clamping plate to move in opposite directions, the clamping plate drives the hollow support block and the moving wheel to move, the hollow support block then drives the clamping block to clamp and fix the optical lens glass sample through the rotating rod, the second electric telescopic rod contracts to drive the polishing table to descend, the first electric telescopic rod extends to move the toothed plate, the toothed plate drives the gear to rotate, the gear drives the rotating rod to rotate and then drives the clamping block to rotate, after the rotation is completed, the second electric telescopic rod is started again, the second electric telescopic rod drives the polishing table to return to its original position, and the optical lens glass sample can be flipped over. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural stereoscopic schematic diagram of a flipping device for an optical lens glass sample hand repair machine proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the front and cross-sectional view of the structure of a turning device for an optical lens glass sample hand repair machine proposed by the utility model;

[0021] Figure 3 This is a top view and cross-sectional schematic diagram of a structural hollow support block of a flip device for an optical lens glass sample hand repair machine proposed by the utility model;

[0022] Figure 4 This is a left-side sectional schematic diagram of the structure of the right hollow support block of a turning device for an optical lens glass sample hand repair machine proposed by the utility model.

[0023] In the figure: 100, bottom plate; 110, vertical plate; 111, stretching groove; 112, stretching rod; 113, return spring; 114, horizontal plate; 115, sliding groove; 116, blocking block; 120, clamping groove; 121, positioning hole; 122, positioning column; 130, servo motor; 131, two-way screw rod; 132, clamping plate; 133, hollow support block; 134, rotating rod; 135, gear; 136, clamping block; 140, tooth plate; 141, sliding rod; 142, first electric telescopic rod; 150, moving wheel; 160, mounting groove; 161, second electric telescopic rod; 162, grinding table; 163, L-shaped plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The utility model provides a flipping device for an optical lens glass sample hand repair machine, which can avoid the situation where the optical lens glass sample is damaged by excessive clamping when the optical lens glass sample is clamped and fixed, and can flip the optical lens glass sample. Figure 1-4 , comprising a base plate 100;

[0028] Please refer again Figure 1-4The top rear side of the bottom plate 100 is fixedly connected with a vertical plate 110, and the vertical plate 110 is used to install the clamping plate 132 and the servo motor 130. The upper sides of the left and right sides of the front side walls of the vertical plate 110 are provided with stretching grooves 111, and the stretching grooves 111 are used to install and limit the stretching rod 112. The inner cavity of the stretching groove 111 is plugged with a stretching rod 112, and the stretching rod 112 is used to install a horizontal plate 114 and a reset spring 113. The outer wall of the stretching rod 112 is sleeved with a reset spring 113, and the reset spring 113 is used to reset the stretching rod 112. The ends of the two stretching rods 112 extend to the outside of the stretching groove 111 and are fixedly connected with a horizontal plate 114, and the horizontal plate 114 is used to pass through the horizontal plate 1 14 pulls the stretching rod 112 to move, and sliding grooves 115 are opened on the left and right sides of the bottom of the horizontal plate 114. The sliding grooves 115 are used to install and limit the blocking block 116. The inner cavity of the sliding groove 115 is slidably connected with the blocking block 116. The blocking block 116 is used to limit the clamping plate 132. A gasket is provided on the top of the blocking block 116. The gasket is used to increase the resistance of the blocking block 116 and the sliding groove 115. When adjusting one blocking block 116, the other blocking block 116 will not move. The bottom of the blocking block 116 extends to the outside of the horizontal plate 114, and the rear side wall of the blocking block 116 is slidably connected to the front side wall of the vertical plate 110. The upper side of the front side wall of the vertical plate 110 is opened There is a clamping groove 120, the clamping groove 120 is used to install the bidirectional screw rod 131 and limit the clamping plate 132, the clamping groove 120 is located below the horizontal plate 114, and the upper left and right sides of the front side wall of the vertical plate 110 are provided with positioning holes 121, the positioning holes 121 are used to install positioning columns 122, the positioning holes 121 are evenly distributed from the outside to the inside, and the positioning holes 121 are provided with two rows, and the two rows of positioning holes 121 are respectively located on the upper and lower sides of the clamping groove 120, and the inner cavities of the upper and lower positioning holes 121 on the left and right sides are plugged with positioning columns 122, and the positioning columns 122 are used to cooperate with the positioning holes 121 to fix the blocking block 116, and the upper and lower positioning columns 122 on the left and right sides are arranged on the upper and lower sides. The ends are fixedly connected to the upper and lower sides of the rear side walls of the left and right blocking blocks 116, respectively. By pulling the cross plate 114, the cross plate 114 moves to drive the stretching rod 112 and the blocking block 116 to move. The stretching rod 112 moves to drive the return spring 113 to contract. The blocking block 116 moves to drive the positioning column 122 to disengage from the positioning hole 121. The blocking blocks 116 on both sides are moved to the positions that need to be adjusted. The cross plate 114 is released. The return spring 113 rebounds to drive the stretching rod 112 to reset and then drive the cross plate 114 to reset. When the cross plate 114 is reset, it drives the blocking block 116 to move and then drives the positioning column 122 to insert into the corresponding positioning hole 121.

[0029] In summary, it is possible to avoid the situation where the optical lens glass sample is damaged by excessive clamping when the optical lens glass sample is clamped and fixed.

[0030] Please refer again Figure 1-4The upper side of the right side wall of the vertical plate 110 is fixedly connected with a servo motor 130 by bolts. The servo motor 130 is used to drive the bidirectional screw rod 131 to rotate. The left side wall of the clamping groove 120 is rotatably connected with the bidirectional screw rod 131 through a bearing. The bidirectional screw rod 131 is used to drive the clamping plate 132 to move in opposite directions. The end of the bidirectional screw rod 131 is fixedly connected to the output shaft of the servo motor 130. The left and right sides of the outer wall of the bidirectional screw rod 131 are screwed with clamping plates 132. The clamping plate 132 is used to drive the hollow support block 133 to move. The clamping plate 132 is located on the outer side of the blocking block 116. The lower side of the front side wall of the clamping plate 132 is fixedly connected with a hollow support block 133. The hollow support block 133 is used to drive the rotating rod 134 and then drive the clamping block 136 to move towards the light. The optical lens glass sample is clamped and fixed, and the elbow can be placed on it when polishing the optical lens glass sample with the cushion block on the top. The front sides of the left and right side walls of the inner cavity of the hollow support block 133 are rotatably connected with a rotating rod 134 through a bearing. The rotating rod 134 is used to install and drive the clamping block 136 to rotate. The outer wall of the rotating rod 134 is fixedly connected with a gear 135. The gear 135 is used to cooperate with the toothed plate 140 to drive the rotating rod 134 to rotate. The end of the rotating rod 134 extends to the inner side of the hollow support block 133 and is fixedly connected with a clamping block 136. The clamping block 136 is used to clamp and fix the optical lens glass sample. The inner wall of the clamping block 136 is provided with an anti-slip gasket, which is used to lift the clamping block 136 and the optical lens glass sample The friction between the plates improves the clamping and fixing effect. The top of the gear 135 is meshed with a toothed plate 140, and the toothed plate 140 is used to drive the gear 135 to rotate. The top of the toothed plate 140 is plugged with a slide bar 141, and the slide bar 141 is used to limit the toothed plate 140. The front end and the end of the slide bar 141 are respectively fixedly connected to the front and rear side walls of the inner cavity of the hollow support block 133. The rear side wall of the toothed plate 140 is fixedly connected to a first electric telescopic rod 142, and the first electric telescopic rod 142 is used to drive the toothed plate 140 to move. The end of the first electric telescopic rod 142 is fixedly connected to the rear side wall of the inner cavity of the hollow support block 133. The bottom front side of the hollow support block 133 is fixedly connected with a moving wheel 150, and the moving wheel 150 is used to move the hollow support block 133. Auxiliary support, the bottom of the moving wheel 150 is slidably connected to the top of the base plate 100, and a mounting groove 160 is opened in the middle of the top front side of the base plate 100. The mounting groove 160 is used to install the second electric telescopic rod 161. The bottom of the inner cavity of the mounting groove 160 is fixedly connected with the second electric telescopic rod 161. The second electric telescopic rod 161 is used to install and drive the grinding table 162 to move. The end of the second electric telescopic rod 161 extends to the outside of the mounting groove 160 and is fixedly connected with the grinding table 162. The grinding table 162 is used to support the bottom of the optical lens glass sample. A gasket is provided on the top of the grinding table 162. The gasket is used to prevent the optical lens glass sample from hard contact with the grinding table 162. The rear side wall of the grinding table 162 is slidably connected with an L-shaped plate 163.The L-shaped plate 163 is used to limit the grinding table 162. The bottom of the L-shaped plate 163 is fixedly connected to the top of the bottom plate 100. The servo motor 130, the second electric telescopic rod 161 and the first electric telescopic rod 142 are respectively started by an external controller. The output shaft of the servo motor 130 rotates to drive the bidirectional screw rod 131 to rotate. The bidirectional screw rod 131 rotates to drive the clamping plate 132 to move in opposite directions. The clamping plate 132 drives the hollow support block 133 and the moving wheel 150 to move. The hollow support block 133 Then, the rotating rod 134 drives the clamping block 136 to clamp and fix the optical lens glass sample, the second electric telescopic rod 161 contracts to drive the polishing table 162 to descend, the first electric telescopic rod 142 extends to move the toothed plate 140, the toothed plate 140 drives the gear 135 to rotate, the gear 135 drives the rotating rod 134 to rotate and then drives the clamping block 136 to rotate, after the rotation is completed, the second electric telescopic rod 161 is started again, and the second electric telescopic rod 161 drives the polishing table 162 to return to its original position;

[0031] In summary, the optical lens glass sample can be turned over.

[0032] During specific use, personnel in this technical field place the optical lens glass sample on the polishing table 162, adjust the position of the blocking block 116 according to the diameter of the optical lens glass sample, pull the horizontal plate 114, the horizontal plate 114 moves to drive the stretching rod 112 and the blocking block 116 to move, the stretching rod 112 moves to drive the reset spring 113 to contract, the blocking block 116 moves to drive the positioning column 122 to disengage from the positioning hole 121, and move the blocking blocks 116 on both sides to the position to be adjusted, release the horizontal plate 114, the reset spring 113 rebounds to drive the stretching rod 112 to reset and then drive the horizontal plate 114 to reset, and while the horizontal plate 114 is reset, it drives the blocking block 116 to move and then drives the positioning column 122 to insert into the corresponding positioning hole 121, and starts the servo motor 130, the second electric telescopic rod 161 and the first electric telescopic rod 142 respectively through the external controller, and the output shaft of the servo motor 130 rotates to drive the double The screw rod 131 rotates, and the bidirectional screw rod 131 rotates to drive the clamping plate 132 to move in the opposite direction, and the clamping plate 132 drives the hollow support block 133 and the moving wheel 150 to move, and the hollow support block 133 then drives the clamping block 136 to clamp and fix the optical lens glass sample through the rotating rod 134. Under the action of the blocking block 116, the clamping block 136 will not excessively clamp the optical lens glass sample. When polishing, the elbow can be placed on the pad on the hollow support block 133. When it is necessary to turn it over, the second electric telescopic rod 161 contracts to drive the polishing table 162 to descend, and the first electric telescopic rod 142 extends to move the toothed plate 140, and the toothed plate 140 drives the gear 135 to rotate, and the gear 135 drives the rotating rod 134 to rotate and then drives the clamping block 136 to rotate. After the rotation is completed, the second electric telescopic rod 161 is started again, and the second electric telescopic rod 161 drives the polishing table 162 to return to its original position.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A turning device for an optical lens glass sample hand repair machine, characterized in that: The invention comprises a bottom plate (100), a vertical plate (110) being fixedly connected to the top rear side of the bottom plate (100), a stretching groove (111) being opened on the upper sides of the left and right sides of the front side wall of the vertical plate (110), a stretching rod (112) being inserted into the inner cavity of the stretching groove (111), a return spring (113) being sleeved on the outer side wall of the stretching rod (112), and the ends of the two stretching rods (112) extending to the ends of the stretching groove (111). A horizontal plate (114) is fixedly connected to the outside, and sliding grooves (115) are provided on the left and right sides of the bottom of the horizontal plate (114). A blocking block (116) is slidably connected to the inner cavity of the sliding groove (115). A gasket is provided on the top of the blocking block (116). The bottom of the blocking block (116) extends to the outside of the horizontal plate (114), and the rear side wall of the blocking block (116) is slidably connected to the front side wall of the vertical plate (110).

2. The turning device for an optical lens glass sample hand repair machine according to claim 1, characterized in that: A clamping groove (120) is opened on the upper side of the front side wall of the vertical plate (110), and the clamping groove (120) is located below the horizontal plate (114). Positioning holes (121) are opened on the upper sides of the left and right sides of the front side wall of the vertical plate (110), and the positioning holes (121) are evenly distributed from the outside to the inside. The positioning holes (121) are arranged in two rows, and the two rows of positioning holes (121) are respectively located on the upper and lower sides of the clamping groove (120). Positioning columns (122) are inserted into the inner cavities of the positioning holes (121) on the upper and lower sides of the left and right sides, and the ends of the positioning columns (122) on the upper and lower sides of the left and right sides are respectively fixedly connected to the upper and lower sides of the rear side walls of the left blocking block (116) and the right blocking block (116).

3. The turning device for an optical lens glass sample hand repair machine according to claim 2, characterized in that: The upper side of the right side wall of the vertical plate (110) is fixedly connected to a servo motor (130) by bolts, and the left side wall of the clamping groove (120) is rotatably connected to a bidirectional screw rod (131) by a bearing, and the end of the bidirectional screw rod (131) is fixedly connected to the output shaft of the servo motor (130), and the left and right sides of the outer side wall of the bidirectional screw rod (131) are screwed with clamping plates (132), and the clamping plates (132) are located on the outside of the blocking block (116). A hollow support block (133) is fixedly connected to the lower side of the front side wall of the holding plate (132); a rotating rod (134) is rotatably connected to the front sides of the left and right side walls of the inner cavity of the hollow support block (133) via bearings; a gear (135) is fixedly connected to the outer side wall of the rotating rod (134); the end of the rotating rod (134) extends to the inner side of the hollow support block (133) and is fixedly connected to a clamping block (136); and an anti-slip pad is provided on the inner side wall of the clamping block (136).

4. The turning device for an optical lens glass sample hand repair machine according to claim 3, characterized in that: The top of the gear (135) is meshed with a toothed plate (140), the top of the toothed plate (140) is plugged with a slide rod (141), the front end and the end of the slide rod (141) are respectively fixedly connected to the front and rear side walls of the inner cavity of the hollow support block (133), the rear side wall of the toothed plate (140) is fixedly connected to a first electric telescopic rod (142), the end of the first electric telescopic rod (142) is fixedly connected to the rear side wall of the inner cavity of the hollow support block (133).

5. The turning device for an optical lens glass sample hand repair machine according to claim 3, characterized in that: A moving wheel (150) is fixedly connected to the front side of the bottom of the hollow support block (133), and the bottom of the moving wheel (150) is slidably connected to the top of the bottom plate (100).

6. The turning device for an optical lens glass sample hand-repairing machine according to claim 1, characterized in that: A mounting groove (160) is provided in the middle of the front side of the top of the base plate (100); a second electric telescopic rod (161) is fixedly connected to the bottom of the inner cavity of the mounting groove (160); a distal end of the second electric telescopic rod (161) extends to the outside of the mounting groove (160) and is fixedly connected to a grinding table (162); a gasket is provided on the top of the grinding table (162); an L-shaped plate (163) is slidably connected to the rear side wall of the grinding table (162); and the bottom of the L-shaped plate (163) is fixedly connected to the top of the base plate (100).

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