CN117086744A - Intelligent numerical control grinding machine based on Internet - Google Patents

Abstract

The invention discloses an intelligent CNC grinder based on the Internet, which includes a box. A controller is installed above one side of the box. A shell is fixedly connected to the top of the other side of the box. The bottom of the box An inclined tube is fixedly connected, and a shell is fixedly connected to the bottom of the box. This intelligent CNC grinder based on the Internet uses the box, shell, collection box, inclined cylinder, shell, rodless cylinder, straight cylinder, vertical block, threaded rod, motor two, motor three, vertical plate, rotating plate, motor four, The cooperation of the cylinder, rack 2, tooth plate, splint, square plate 2, electric push rod 1, grinding wheel, controller and adjustment structure allows the device to drive the gear to rotate through the motor 1, and the gear drives the two Once the rack moves inward, the rack drives the vertical plate to move inward, thereby moving the position of the splint, allowing the staff to adjust the position of the splint, thereby facilitating the grinding of workpieces of different sizes.

Description

An Internet-based intelligent CNC grinder

Technical field

The invention relates to the technical field of grinders, specifically an Internet-based intelligent CNC grinder.

Background technique

A grinder is a machine tool that uses abrasive tools to grind the surface of a workpiece. Most grinders use high-speed rotating grinding wheels for grinding, and a few use other abrasive tools and free abrasives such as whetstones and abrasive belts, such as honing machines, super-finishing machine tools, abrasive belt grinders, grinders and polishing machines. Machine etc.

When currently producing workpieces, it is often necessary to polish the surface of the workpiece, and then a grinder is used to fix the workpiece on the fixture of the grinder. The grinding wheel contacts the surface of the workpiece and at the same time makes the grinding process smooth. The wheel moves left and right, and then the workpiece is polished. Due to different production needs, workpieces of different sizes are often produced, making it inconvenient for workers to adjust the position of the splint, and thus it is inconvenient to polish workpieces of different sizes. At the same time, When the workpiece is polished, waste is often produced. At this time, part of the polished waste can easily adhere to the surface of the workpiece, making it difficult to blow off the attached waste and thus inconvenient to collect the waste. , when collecting waste chips, the waste chips fall into the collection box through the guide of the inclined cylinder, which is inconvenient to vibrate the inclined cylinder, and waste chips are prone to remain, resulting in incomplete collection of waste chips, and when the workpiece is processed When grinding, it is often necessary to grind both the front and back sides of the workpiece, which makes it inconvenient to automatically turn the workpiece over. The workpiece needs to be disassembled and flipped before installation, which is cumbersome to operate.

Contents of the invention

The purpose of the present invention is to provide an intelligent CNC grinder based on the Internet to solve the problem in the above background technology that it is inconvenient for workers to adjust the position of the splint, which is inconvenient to grind workpieces of different sizes, and it is inconvenient to remove attached waste chips. Blow down, which makes it inconvenient to collect waste chips and vibrate the inclined cylinder. It is easy for waste chips to remain, resulting in incomplete collection of waste chips. It is not convenient to automatically turn over the workpiece. The workpiece needs to be disassembled and turned over. The installation and operation are more troublesome.

In order to achieve the above object, the present invention provides the following technical solution: an intelligent CNC grinder based on the Internet, including a box, a controller is installed on one side of the box, and a controller is fixedly connected on the other side of the box. Shell, the bottom of the box is fixedly connected with an inclined cylinder, the bottom of the box is fixedly connected with a housing, the top side of the inner wall of the box is fixedly connected with a rodless cylinder, and the slider of the rodless cylinder A straight cylinder is fixedly connected. The inner wall of one end of the straight cylinder is connected to a threaded rod through a bearing. One end of the threaded rod is fixedly connected to the output end of the second motor. One end of the second motor is fixedly connected to one end of the straight cylinder. The thread The outer wall of the rod is threadedly connected with a vertical block. The lower part of the outer wall of the vertical block is clearance-fitted with the bottom slot of the straight tube. The bottom of the vertical block is fixedly connected with an electric push rod. The telescopic rod of the electric push rod is fixedly connected. There is a motor three. The output end of the motor three is fixedly connected with a grinding wheel. There is a vertical plate on the inside of the box. The upper inner wall of the vertical plate is connected to a rotating plate through a bearing. One end of the rotating plate is connected to the rotating plate. The output end of motor four is fixedly connected, one end of motor four is fixedly connected to the upper side of one side of the vertical plate, the bottom of the inner wall of the housing is fitted with a collection box, and one side of the box is provided with an adjustment structure, so One side of the housing is provided with a blow-down structure, and one side of the housing is provided with a knocking structure.

Preferably, the adjustment structure includes a motor one, the rear end of the motor one is fixedly connected to the bottom of the rear end of the inner wall of the box, the output end of the motor one is fixedly connected to a gear, and the upper and lower ends of the gear are meshed. A rack is connected, one end of the rack is fixedly connected to one side of the vertical plate, a straight bar is provided on one side of the rack, and one end of the straight bar is connected to the bottom of one side of the inner wall of the box. Fixed connection, the outer wall of the straight rod is slidingly engaged with the lower inner wall of the vertical plate.

Preferably, a cylinder is fixedly connected to the inner wall of one end of the rotating plate.

Preferably, the telescopic rod of the cylinder is fixedly connected with a second rack, and the upper and lower sides of the second rack are meshed and connected with toothed plates.

Preferably, a second square plate is rotatably connected to one side of the front end surface of the toothed plate through a pin, and one end of the second square plate is fixedly connected to the outside of one end of the rotating plate.

Preferably, one end of the tooth plate is fixedly connected with a splint.

Preferably, the blow-off structure includes a fan, one end of the fan is fixedly connected to one end of the inner wall of the casing, a filter is provided on one side of the fan, and one inner wall of the filter is connected to one end of the inner wall of the casing through bolts. Network connection, the other side of the fan is provided with a cylinder, one end of the cylinder is connected to a hose, one side of the outer wall of the hose is fixedly connected to a square plate, and there is a slot above the square plate It is slidingly connected with the outer wall of the round block. The rear end of the round block is fixedly connected to the telescopic rod of the electric push rod 2. One end of the electric push rod 2 is fixedly connected to the upper side of the inner wall of the box. The square plate The bottom of the rear end of one is rotatably connected to the top of the rear end of the inner wall of the box through a pin.

Preferably, the knocking structure includes a cross bar, one side of the outer wall of the cross bar is clearance-fitted with the lower inner wall of one side of the housing, and one side of the front end surface of the cross bar is connected to a diagonal bar through a pin rotation, so The upper end of the rear end of the inclined rod is connected to a rod body through a pin rotation. The outer wall of the rod body is clearance matched with the inner wall of one side of the short plate. One end of the short plate is fixedly connected to the upper side of the inner wall of the casing. The horizontal A spring is fitted with a gap on one side of the outer wall of the rod, and the left and right ends of the spring are fixedly connected to the lower side of the inner wall of the housing and to the outer wall side of the crossbar respectively.

Compared with the existing technology, the beneficial effects of the present invention are: the Internet-based intelligent CNC grinder uses a box, a housing, a collection box, an inclined cylinder, an outer shell, a rodless cylinder, a straight cylinder, a vertical block, a threaded rod, and a motor. 2. Motor 3. Vertical plate, rotating plate, motor 4. Cylinder, rack 2. Tooth plate, splint, square plate 2. Electric push rod 1. Grinding wheel, controller and adjustment structure The cooperation makes the device in use At this time, the motor can drive the gear to rotate, the gear drives the two racks to move inward, and the rack drives the vertical plate to move inward, thereby realizing the movement of the position of the splint, making it easier for the staff to adjust the position of the splint. Grinding workpieces of different sizes;

Through the box, shell, collection box, inclined cylinder, shell, rodless cylinder, straight cylinder, vertical block, threaded rod, motor two, motor three, vertical plate, rotating plate, motor four, cylinder, rack two, tooth plate , plywood, square plate 2, electric push rod 1, grinding wheel, controller and blow-off structure, the cooperation allows the device to start working through the fan when in use, thereby allowing the wind to be discharged from the hose, while the electric push rod 2 The round block is driven to move left and right, the round block drives the square plate 1 to swing, and the square plate 1 drives the hose to swing, thereby making it easier to blow off the attached waste and collect the waste;

Through the box, shell, collection box, inclined cylinder, shell, rodless cylinder, straight cylinder, vertical block, threaded rod, motor two, motor three, vertical plate, rotating plate, motor four, cylinder, rack two, tooth plate , plywood, square plate 2, electric push rod 1, grinding wheel, controller and percussion structure, the cooperation allows the device to be used by pulling the cross bar outward, and the cross bar compresses the spring, and at the same time the cross bar drives The inclined rod moves, and the inclined rod drives the rod body to move downward. Release the cross bar, and the spring rebounds, thereby moving the rod body upward. The rod body impacts the inclined cylinder, which facilitates the vibration of the inclined cylinder and avoids the residue of waste chips. Make waste collection more thorough;

Through the box, shell, collection box, inclined cylinder, shell, rodless cylinder, straight cylinder, vertical block, threaded rod, motor two, motor three, vertical plate, rotating plate, motor four, cylinder, rack two, tooth plate , plywood, square plate 2, electric push rod 1, grinding wheel and controller cooperate, so that when the device is in use, the motor 4 can drive the rotating plate to rotate, and the rotating plate drives the square plate 2 and the cylinder to rotate, thereby realizing the workpiece The flipping function facilitates the automatic flipping of the workpiece. There is no need to disassemble the workpiece and then flip it for installation. The operation is simple.

Description of the drawings

Figure 1 is a schematic diagram of the connection relationship of the present invention;

Figure 2 is a schematic structural diagram of the box, shell and collection box in Figure 1;

Figure 3 is a schematic structural diagram of the box, shell and filter in Figure 1;

Figure 4 is a schematic structural diagram of the electric push rod 2, the square plate 1 and the round block in Figure 1;

Figure 5 is a schematic structural diagram of the cylinder, rack 2 and tooth plate in Figure 1;

Figure 6 is a schematic structural diagram of motor three, electric push rod one and grinding wheel in Figure 1;

Figure 7 is a schematic structural diagram of the motor 1, gear and rack 1 in Figure 1.

In the picture: 1. Box, 2. Adjustment structure, 201. Motor one, 202. Gear, 203. Straight rod, 204. Rack one, 3. Blowing down structure, 301. Fan, 302. Filter, 303. Cylinder, 304, hose, 305, electric push rod two, 306, square plate one, 307, round block, 4, percussion structure, 401, short plate, 402, rod body, 403, inclined rod, 404, spring, 405. Cross bar, 5. Shell, 6. Collection box, 7. Inclined cylinder, 8. Shell, 9. Rodless cylinder, 10. Straight cylinder, 11. Vertical block, 12. Threaded rod, 13. Motor two, 14 , Motor three, 15, vertical plate, 16, rotating plate, 17, motor four, 18, cylinder, 19, rack two, 20, tooth plate, 21, splint, 22, square plate two, 23, electric push rod one , 24. Grinding wheel, 25. Controller.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1-7. The present invention provides a technical solution: an intelligent CNC grinder based on the Internet, including a box 1. A controller 25 is installed on one side of the box 1, and the staff controls the external terminal. Then the signal is transmitted to the driving structure through the controller, thereby realizing the control of the device. A shell 8 is fixedly connected to the top of the other side of the box 1, and an inclined tube 7 is fixedly connected to the bottom of the box 1. The bottom is fixedly connected with the housing 5, and the top side of the inner wall of the box 1 is fixedly connected with the rodless cylinder 9. The model of the rodless cylinder 9 is determined according to the actual use situation. The slider of the rodless cylinder 9 is fixedly connected with the straight tube 10. The inner wall of one end of the straight barrel 10 is connected to a threaded rod 12 through bearing rotation. When the bearing causes the threaded rod 12 to be stressed, it can rotate on the inner wall of one end of the straight barrel 10. One end of the threaded rod 12 is fixedly connected to the output end of the second motor 13, and the second end of the second motor 13 is fixedly connected. The model is determined according to the actual use situation. One end of the motor 13 is fixedly connected to one end of the straight tube 10. The outer wall of the threaded rod 12 is threadedly connected with a vertical block 11. The lower part of the outer wall of the vertical block 11 fits with the bottom slot of the straight tube 10. The bottom of block 11 is fixedly connected with electric push rod 23, and the telescopic rod of electric push rod 23 is fixedly connected with motor three 14. The model of motor three 14 is determined according to the actual use situation. The output end of motor three 14 is fixedly connected with a polished Wheel 24, the inner side of the box 1 is provided with a vertical plate 15, the upper inner wall of the vertical plate 15 is connected to a rotating plate 16 through bearing rotation, one end of the rotating plate 16 is fixedly connected to the output end of the motor 17, the model of the motor 17 is according to It depends on the actual use situation. One end of the motor 17 is fixedly connected to the top of one side of the vertical plate 15. The bottom of the inner wall of the housing 5 is fitted with a collection box 6. The inner wall of one end of the rotating plate 16 is fixedly connected to the cylinder 18. The cylinder 18 The model is determined according to the actual use situation. The telescopic rod of the cylinder 18 is fixedly connected with a rack 19. The upper and lower sides of the rack 19 are meshed and connected with a tooth plate 20. One side of the front end surface of the tooth plate 20 is connected through a pin rotation. There is a second square plate 22. The toothed plate 20 can rotate on the rear end side of the second square plate 22 when the pin shaft is stressed. One end of the second square plate 22 is fixedly connected to the outside of one end of the rotating plate 16, and one end of the toothed plate 20 is fixed. A splint 21 is connected, an adjustment structure 2 is provided on one side of the box 1, a blow-down structure 3 is provided on one side of the housing 8, and a knocking structure 4 is provided on one side of the housing 5.

The adjustment structure 2 includes a motor 201. The rear end of the motor 201 is fixedly connected to the bottom of the rear end of the inner wall of the box 1. The model of the motor 201 is determined according to the actual use situation. The output end of the motor 201 is fixedly connected with a gear 202. The upper and lower ends of the gear 202 are meshed and connected with a rack 204. One end of the rack 204 is fixedly connected to the bottom of one side of the vertical plate 15. A straight bar 203 is provided on one side of the rack 204. One end of the straight bar 203 Fixedly connected to the lower side of the inner wall of the box 1, the outer wall of the straight rod 203 is slidingly engaged with the lower inner wall of the vertical plate 15. The straight rod 203 plays a limiting role when the vertical plate 15 moves left and right under force.

The blow down structure 3 includes a fan 301. One end of the fan 301 is fixedly connected to one end of the inner wall of the housing 8. The model of the fan 301 is determined according to the actual usage. One side of the fan 301 is provided with a filter 302, and one side of the filter 302 is provided with an inner wall. The inner wall of one end of the casing 8 is connected by bolts. The other side of the fan 301 is provided with a cylinder 303. One end of the cylinder 303 is connected with a hose 304. A square plate 306 is fixedly connected to one side of the outer wall of the hose 304. The upper slot of plate one 306 is slidingly connected with the outer wall of round block 307. The rear end of round block 307 is fixedly connected with the telescopic rod of electric push rod two 305. The model of electric push rod two 305 is determined according to the actual use situation. One end of the push rod 305 is fixedly connected to the top of one side of the inner wall of the box 1, and the bottom of the rear end of the square plate 1 306 is rotatably connected to the top of the rear end of the inner wall of the box 1 through a pin. When the pin is used, the square plate 306 is stressed. It can rotate above the rear end of the inner wall of the box 1.

The percussion structure 4 includes a cross bar 405. One side of the outer wall of the cross bar 405 is in clearance fit with the inner wall below one side of the housing 5. The front end surface of the cross bar 405 is connected to an oblique bar 403 through a pin rotation. The oblique bar 403 has A rod 402 is connected to the top of the rear end by a pin rotation. The outer wall of the rod 402 is clearance matched with the inner wall of one side of the short plate 401. One end of the short plate 401 is fixedly connected to the upper side of the inner wall of the housing 5. The outer wall of the cross bar 405 is A spring 404 is fitted in the side gap, and the spring 404 gives the cross bar 405 an inward force. The left and right ends of the spring 404 are fixedly connected to the lower side of the inner wall of the housing 5 and the outer wall side of the cross bar 405 respectively.

When using the Internet-based intelligent CNC grinder, first connect motor one 201, motor two 13, motor three 14, motor four 17, electric push rod one 23, electric push rod two 305 and fan 301 to the external power supply. The terminal is controlled, and then the signal is transmitted to the driving structure through the controller. The motor 201 starts to work, and the motor drives the gear to rotate. The gear drives the two racks to move inward, and the rack drives the vertical plate to move inward, thereby realizing the alignment. The movement of the position of the splint controls the external control module, so that the cylinder 18 drives the rack 2 19 to move outward, the rack 2 19 drives the tooth plate 20 to rotate, the tooth plate 20 drives the splint 21 to rotate, thereby fixing the workpiece, and the electric push rod One 23 starts to work, the electric push rod one 23 drives the motor three 14 to move downward, and then the grinding wheel 24 fits the surface of the workpiece, the motor three 14 starts to work, the motor three 14 drives the grinding wheel 24 to rotate, and the motor two 13 starts to work , the second motor 13 drives the threaded rod 12 to rotate, the threaded rod 12 drives the vertical block 11 to move left and right, and then the grinding wheel 24 moves left and right, and controls the external control module to make the rodless cylinder 9 drive the straight tube 10 to move forward and backward, thereby realizing the grinding wheel 24 movement. 24 moves forward and backward to realize the grinding work of the workpiece. At the same time, the fan 301 and the electric push rod 305 start to work, and the wind is discharged from the hose 304. At the same time, the electric push rod 305 drives the round block 307 to move left and right, and the round block 307 drives the square block 307. The first plate 306 swings, and the square plate 306 drives the hose 304 to swing, thereby making it easier to blow off the attached waste chips. When the back side of the workpiece needs to be polished, the fourth motor 17 starts to work, and the fourth motor 17 drives the rotating plate 16 to rotate. , thereby realizing the flipping of the workpiece to facilitate grinding the reverse side of the workpiece. The polished waste material falls into the inside of the collection box 6 through the inclined cylinder 7, and the cross bar 405 is pulled outward. The cross bar 405 compresses the spring 404, and at the same time the cross bar 405 drives the inclined rod 403 to move, the inclined rod 403 drives the rod body 402 to move downward, loosen the cross bar 405, the spring 404 rebounds, and then moves the rod body 402 upward, and the rod body 402 impacts the inclined cylinder 7, thereby facilitating the inclined cylinder 7 Vibrates to collect waste more thoroughly.

In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top" ", "inner", "front", "center", "both ends", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore is not to be construed as a limitation of the invention.

In the present invention, unless otherwise expressly stipulated and limited, the terms "installation", "setting", "connection", "fixing", "rotating" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. It can be detachably connected or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements. , unless otherwise explicitly limited, those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. An intelligent CNC grinder based on the Internet, including a box (1), characterized in that: a controller (25) is installed on one side of the box (1), and the other side of the box (1) A shell (8) is fixedly connected to the top of one side, an inclined tube (7) is fixedly connected to the bottom of the box (1), and a casing (5) is fixedly connected to the bottom of the box (1). A rodless cylinder (9) is fixedly connected to one side of the top of the inner wall of the body (1). The slider of the rodless cylinder (9) is fixedly connected to a straight tube (10). The inner wall of one end of the straight tube (10) rotates through a bearing. A threaded rod (12) is connected, one end of the threaded rod (12) is fixedly connected to the output end of the second motor (13), and one end of the second motor (13) is fixedly connected to one end of the straight tube (10). The outer wall of the threaded rod (12) is threadedly connected with a vertical block (11). The lower part of the outer wall of the vertical block (11) is in clearance fit with the bottom slot of the straight tube (10). The bottom of the vertical block (11) is fixedly connected with Electric push rod one (23), the telescopic rod of electric push rod one (23) is fixedly connected with motor three (14), and the output end of said motor three (14) is fixedly connected with a grinding wheel (24). There is a vertical plate (15) on the inside of the box (1). The upper inner wall of the vertical plate (15) is connected to a rotating plate (16) through a bearing. One end of the rotating plate (16) is connected to the motor four (17). ) is fixedly connected to the output end, one end of the motor four (17) is fixedly connected to the top of one side of the vertical plate (15), the bottom of the inner wall of the housing (5) is fitted with a collection box (6), the One side of the box (1) is provided with an adjustment structure (2), one side of the housing (8) is provided with a blow-down structure (3), and one side of the housing (5) is provided with a knocking structure ( 4). 2. An Internet-based intelligent CNC grinder according to claim 1, characterized in that: the adjustment structure (2) includes a motor (201), the rear end of the motor (201) and the box (201) 1) is fixedly connected below the rear end of the inner wall, the output end of the motor one (201) is fixedly connected with a gear (202), and the upper and lower ends of the gear (202) are meshed and connected with a rack one (204), so One end of the rack one (204) is fixedly connected to the lower side of one side of the vertical plate (15). A straight rod (203) is provided on one side of the rack one (204). One end of the straight rod (203) It is fixedly connected to the lower side of the inner wall of the box (1), and the outer wall of the straight rod (203) is slidingly connected with the lower inner wall of the vertical plate (15). 3. An Internet-based intelligent CNC grinder according to claim 1, characterized in that: a cylinder (18) is fixedly connected to the inner wall of one end of the rotating plate (16). 4. An Internet-based intelligent CNC grinder according to claim 3, characterized in that: the telescopic rod of the cylinder (18) is fixedly connected with a second rack (19), and the second rack (19) The upper and lower sides are meshed and connected with tooth plates (20). 5. An Internet-based intelligent CNC grinder according to claim 4, characterized in that: one side of the front end surface of the tooth plate (20) is connected to two square plates (22) through a pin rotation, and the square plate (22) is connected to the front end surface of the tooth plate (20). One end of the second plate (22) is fixedly connected to the outside of one end of the rotating plate (16). 6. An Internet-based intelligent CNC grinder according to claim 4, characterized in that: a splint (21) is fixedly connected to one end of the tooth plate (20). 7. An Internet-based intelligent CNC grinder according to claim 1, characterized in that: the blow-off structure (3) includes a fan (301), and one end of the fan (301) is connected to the outer casing (8). One end of the inner wall is fixedly connected, and one side of the fan (301) is provided with a filter screen (302). The inner wall of one side of the filter screen (302) is connected to the inner wall of one end of the housing (8) through bolts. The fan (301) There is a barrel (303) on the other side of the barrel (301). One end of the barrel (303) is connected with a hose (304). One side of the outer wall of the hose (304) is fixedly connected with a square plate (306). ), the upper slot of the square plate one (306) is slidingly connected with the outer wall of the round block (307), and the rear end of the round block (307) is fixedly connected with the telescopic rod of the electric push rod two (305). One end of the electric push rod two (305) is fixedly connected to the upper side of the inner wall of the box (1), and the lower end of the rear end of the square plate one (306) is connected to the rear end of the inner wall of the box (1) through a pin. Rotate the connection above. 8. An Internet-based intelligent CNC grinder according to claim 1, characterized in that: the knocking structure (4) includes a cross bar (405), and one side of the outer wall of the cross bar (405) is in contact with the shell. The lower inner wall of one side of the body (5) has a clearance fit. The front end surface of the cross bar (405) is connected to an oblique rod (403) through a pin, and the upper rear end of the oblique rod (403) is connected through a pin. A rod (402) is rotatably connected. The outer wall of the rod (402) is in clearance fit with the inner wall of one side of the short plate (401). One end of the short plate (401) is fixed above one side of the inner wall of the housing (5). connection, a spring (404) is fitted with a gap on one side of the outer wall of the cross bar (405), and the left and right ends of the spring (404) are respectively connected to the bottom of one side of the inner wall of the housing (5) and to the side of the cross bar (405). Fixed connection on one side of the outer wall.