Single-chip microcomputer surface coating device

Abstract

The utility model belongs to the technical field of single-chip microcomputer production, and discloses a single-chip microcomputer surface coating device which comprises a U-shaped base, clamping grooves are formed in the inner walls of the left side and the right side of the U-shaped base, a clamping mechanism for positioning the coating position of a single-chip microcomputer is arranged in the U-shaped base, and a cleaning mechanism and a coating mechanism are arranged on the upper surface of the U-shaped base. The cleaning mechanism is arranged at the front end of the coating mechanism, the clamping mechanism is located at the lower end of the cleaning mechanism and the lower end of the coating mechanism, and the single-chip microcomputer is clamped and positioned by starting the clamping mechanism, so that the follow-up single-chip microcomputer is prevented from moving in the cleaning and coating process as much as possible; the cleaning mechanism is started to absorb dust in the dust cleaning process of the single-chip microcomputer, so that the situation that follow-up floating dust floats and accumulates on the upper surface of the single-chip microcomputer again in the follow-up sedimentation process is avoided as much as possible, and the cleaning efficiency of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to singlechip production technical field, concretely relates to a singlechip surface coating device. BACKGROUND

[0002] Singlechip is a kind of integrated circuit chip, is using super large scale integrated circuit technology to be integrated to the silicon chip with the central processing unit CPU of data processing ability, random access memory RAM, read-only memory ROM, multiple I / O and interrupt system, timer / counter etc. Function constitutes a small and perfect microcomputer system, and is widely used in industrial control field, from the 80's of last century, by the 4-bit, 8-bit singlechip, development to the 300M high-speed singlechip of present.

[0003] In the implementation of the present application, it is found that the existing singlechip surface coating device has the following problems: the cleaning mechanism cannot limit the dust accumulated on the surface of the singlechip during use, so that the dust continues to accumulate on the surface of the singlechip after subsequent precipitation, thus reducing the practicability of the device.

[0004] Therefore, a singlechip surface coating device is proposed. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at: for solving the problem that the existing singlechip surface coating device cannot limit the dust accumulated on the surface of the singlechip during use, so that the dust continues to accumulate on the surface of the singlechip after subsequent precipitation, the utility model provides a singlechip surface coating device.

[0006] The utility model in order to realize above-mentioned purpose specifically adopts the following technical scheme:

[0007] A singlechip surface coating device, comprising a U-shaped base, the left and right two side inner walls of the U-shaped base are provided with clamping grooves, the inside of the U-shaped base is provided with a clamping mechanism for positioning the coating position of singlechip, the upper surface of the U-shaped base is provided with a cleaning mechanism and a coating mechanism, the position of the cleaning mechanism is set at the front end of the coating mechanism, and the position of the clamping mechanism is located at the lower end of the cleaning mechanism and the coating mechanism.

[0008] Further, the clamping mechanism comprises a fixed block one, a fixed block two and a top plate, the top plate is slidably connected inside the two groups of clamping grooves of the U-shaped base, the fixed block two is installed at the bottom of the inner wall of the U-shaped base, the fixed block one is installed on the lower surface of the top plate, the front surface of the fixed block two is provided with an electric telescopic rod, the output end of the electric telescopic rod is installed on the back surface of the fixed block one, the upper surface of the top plate is provided with a clamping groove, the left and right two side walls of the top plate clamping groove are both provided with a through hole, the two groups of through holes of the top plate are both rotatably connected with a bidirectional screw rod, the outer thread of the bidirectional screw rod is connected with two groups of side plates, the lower surface of the top plate is provided with an L-shaped connecting block, the inner wall bottom of the L-shaped connecting block is installed with a motor one, the output shaft of the motor one is installed with a bevel gear two, the outer teeth of the bevel gear two are meshedly connected with a bevel gear one, and the bevel gear one is installed on the outer surface of the side plate.

[0009] Further, the cleaning mechanism comprises a U-shaped fixed plate, the U-shaped fixed plate is installed on the upper surface of the U-shaped base, the right inner side wall of the U-shaped fixed plate is provided with a clamping groove, the inner wall top of the U-shaped fixed plate clamping groove is installed with a hydraulic cylinder one, the output end of the hydraulic cylinder one is installed with a sliding block, the sliding block is slidably connected inside the clamping groove of the U-shaped fixed plate, the side, away from the U-shaped fixed plate, of the sliding block is provided with a motor two, the inner part of the sliding block is provided with a groove, the output shaft of the motor two penetrates through the inner groove of the sliding block and is installed with a fixed rod, the outer surface of the fixed rod is provided with a plurality of cleaning brushes, the upper surface of the U-shaped fixed plate is installed with a dust collector, the front and back of the U-shaped fixed plate is both installed with an air suction pipe, the air suction end of the dust collector is installed with a dust suction pipe, the front and back of the dust suction pipe are both provided with an air suction hole, the inner part of the two groups of air suction holes of the dust suction pipe are both inserted with a connecting pipe, and the air suction ends of the two groups of connecting pipes are respectively installed inside the air exhaust holes of the two groups of air suction pipes.

[0010] Further, the coating mechanism comprises an L-shaped fixed plate, the L-shaped fixed plate is installed on the upper surface of the U-shaped base, the inner side wall of the L-shaped fixed plate is provided with a clamping groove, the inner wall top of the L-shaped fixed plate clamping groove is provided with a hydraulic cylinder two, the output end of the hydraulic cylinder two is installed with a sliding plate, the upper surface of the sliding plate is provided with a clamping groove, the clamping groove inside the sliding plate is clamped with a spray head, the upper surface of the L-shaped fixed plate is provided with a storage box, the material guide end of the storage box is installed with a material guide pipe, and the material guide end of the material guide pipe is installed inside the material inlet of the spray head.

[0011] Further, the adjacent side of the two groups of bidirectional screw rods is provided with a groove, the groove inside the two groups of bidirectional screw rods is provided with a strip-shaped pressure sensor, the position of the lower surface of the two groups of strip-shaped pressure sensors is parallel to the position of the upper surface of the top plate, and the control end of the two groups of strip-shaped pressure sensors and the motor one is electrically connected.

[0012] Further, the front surface of the fixed block one is provided with two groups of through holes, the two groups of through holes are slidably connected with limiting rods, and the back surfaces of the two groups of limiting rods are installed on the front surface of the fixed block two.

[0013] The utility model discloses the beneficial effects are as follows:

[0014] 1. The utility model discloses a cone gear two and cone gear one are triggered to the inside of top plate of side plate and make the side plate in the process of rotation drive two groups of bidirectional screw rod in the clamping groove of top plate and slide, and then make the subsequent two groups of bidirectional screw rod in the process of moving clamp and connect the left and right sides of singlechip, and then move the fixed block one by starting electric telescopic link and drive top plate, and adjust the upper end singlechip of top plate and move to the just lower end of coating mechanism, so that the subsequent singlechip is produced in the process of cleaning and coating as far as possible to move, thereby improve the stability of the device in the process of processing singlechip.

[0015] 2. The utility model discloses a hydraulic cylinder one is pushed to the position of multiple cleaning brushes and is adjusted to move and abuts to the upper surface of singlechip by starting, and then drive fixed link and multiple cleaning brushes and rotate by starting motor two, so that the subsequent multiple cleaning brushes clean the dust accumulated on the upper surface of singlechip in the process of rotation, and the dust floating in the process of singlechip cleaning is sucked into the inside of two groups of air suction ducts by starting dust collector, so that the subsequent floating dust is accumulated on the upper surface of singlechip again in the process of subsequent precipitation as far as possible, and therefore improve the cleaning efficiency of the device. ACCURACY OF DRAWINGS

[0016] Figure 1 It is the top surface structure schematic drawing of the utility model;

[0017] Figure 2 It is the front surface structure schematic drawing of the utility model;

[0018] Figure 3 It is the back surface structure schematic drawing of the cleaning mechanism of the utility model;

[0019] Figure 4 It is the utility model Figure 2 The enlarged view of A in the utility model.

[0020] Mark No. : 1, U-shaped base; 2, clamping mechanism; 201, fixed block one; 202, fixed block two; 203, electric telescopic rod; 204, top plate; 205, side plate; 206, bidirectional screw; 207, bevel gear one; 208, L-shaped connecting block; 209, motor one; 210, bevel gear two; 3, cleaning mechanism; 301, motor two; 302, air suction pipe; 303, dust collector; 304, fixed rod; 305, cleaning brush; 306, dust suction pipe; 307, connecting pipe; 308, hydraulic cylinder one; 309, sliding block; 310, U-shaped fixed plate; 4, limiting rod; 5, coating mechanism; 501, L-shaped fixed plate; 502, hydraulic cylinder two; 503, storage box; 504, material guide pipe; 505, sliding plate; 506, spray head; 6, strip-shaped pressure sensor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0023] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or position relationships shown in the drawings, or the directions or position relationships in which the product of the present application is usually placed, which are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular direction, be constructed and operated in a particular direction, therefore, cannot be understood as limiting the present application.

[0025] As Figures 1 to 4As shown in the figure, a single-chip surface coating device, including a U-shaped base 1, the left and right two sides of the inner wall of the U-shaped base 1 are provided with clamping grooves, the inside of the U-shaped base 1 is provided with a clamping mechanism 2 for positioning the single-chip coating position, the upper surface of the U-shaped base 1 is provided with a cleaning mechanism 3 and a coating mechanism 5, the position of the cleaning mechanism 3 is set in front of the coating mechanism 5, the position of the clamping mechanism 2 is located below the cleaning mechanism 3 and the coating mechanism 5; Specifically, by starting the clamping mechanism 2 to clamp and position the single-chip, so as to avoid the subsequent movement of the single-chip in the cleaning and coating process as much as possible, thereby improving the stability of the device in the subsequent single-chip processing process; By starting the cleaning mechanism 3 to clean the dust in the process of the single-chip, the dust is absorbed, so as to avoid the subsequent floating dust from floating and accumulating on the upper surface of the single-chip in the subsequent sedimentation process, thereby improving the cleaning efficiency of the device.

[0026] As shown in Figure 1 , Figure 2 and Figure 4 , the clamping mechanism 2 includes a fixed block one 201, a fixed block two 202 and a top plate 204, the top plate 204 is slidably connected inside the two clamping grooves of the U-shaped base 1, the fixed block two 202 is installed on the inner wall bottom of the U-shaped base 1, the fixed block one 201 is installed on the lower surface of the top plate 204, the front of the fixed block two 202 is provided with an electric telescopic rod 203, the output end of the electric telescopic rod 203 is installed on the back of the fixed block one 201, the upper surface of the top plate 204 is provided with a clamping groove, the left and right two sides of the top plate 204 clamping groove are provided with through holes, the two groups of through holes inside the top plate 204 are rotatably connected with a pair of bidirectional screws 206, the outside of the bidirectional screws 206 is threadedly connected with two groups of side plates 205, the lower surface of the top plate 204 is provided with an L-shaped connecting block 208, the inner wall bottom of the L-shaped connecting block 208 is installed with a motor one 209, the output shaft of the motor one 209 is installed with a conical gear two 210, the outside teeth of the conical gear two 210 are meshingly connected with a conical gear one 207, the conical gear one 207 is installed on the outer surface of the side plate 205;

[0027] Specifically, by starting the motor one 209 to drive the conical gear two 210 and the conical gear one 207 to trigger the side plate 205 to rotate inside the top plate 204, so that the side plate 205 drives the two groups of bidirectional screws 206 to slide inside the clamping groove of the top plate 204 in the process of rotating, and then the two groups of bidirectional screws 206 are clamped and connected on the left and right sides of the single-chip in the process of moving, and then the fixed block one 201 is pulled by the electric telescopic rod 203 to drive the top plate 204 to move, the single-chip on the upper end of the top plate 204 is adjusted and moved to the lower end of the coating mechanism 5, so as to avoid the subsequent movement of the single-chip in the cleaning and coating process as much as possible, thereby improving the stability of the device in the subsequent single-chip processing process.

[0028] AsFigures 1 to 3 As shown, the cleaning mechanism 3 comprises a U-shaped fixed plate 310 installed on the upper surface of the U-shaped base 1, a clamping groove is formed in the right inner side wall of the U-shaped fixed plate 310, a hydraulic cylinder one 308 is installed on the inner wall top of the clamping groove of the U-shaped fixed plate 310, a sliding block 309 is slidingly connected inside the clamping groove of the U-shaped fixed plate 310, a motor two 301 is arranged on the side of the sliding block 309 away from the U-shaped fixed plate 310, a recess is formed in the inside of the sliding block 309, a fixed rod 304 is installed on the output shaft of the motor two 301 penetrating through the inside recess of the sliding block 309, a plurality of cleaning brushes 305 are arranged on the outer surface of the fixed rod 304, a dust collector 303 is installed on the upper surface of the U-shaped fixed plate 310, air suction pipes 302 are installed on the front and rear sides of the U-shaped fixed plate 310, a dust suction pipe 306 is installed on the air suction end of the dust collector 303, air suction holes are formed on the front and rear sides of the dust suction pipe 306, connecting pipes 307 are inserted into the two groups of air suction holes of the dust suction pipe 306, and the air suction ends of the two groups of connecting pipes 307 are installed in the air exhaust holes of the two groups of air suction pipes 302.

[0029] Specifically, the position of the plurality of cleaning brushes 305 is quickly adjusted and moved to abut against the upper surface of the single-chip microcomputer by starting the hydraulic cylinder one 308 to push the sliding block 309, and then the fixed rod 304 and the plurality of cleaning brushes 305 are driven to rotate by starting the motor two 301, so that the subsequent plurality of cleaning brushes 305 clean the dust accumulated on the upper surface of the single-chip microcomputer in the process of rotation, and the dust floating in the cleaning process of the single-chip microcomputer is sucked into the inside of the two groups of air suction pipes 302 by starting the dust collector 303, so as to avoid the subsequent floating dust from being accumulated again on the upper surface of the single-chip microcomputer in the subsequent sedimentation process, thereby improving the cleaning efficiency of the device.

[0030] As Figure 1As shown, the coating mechanism 5 includes an L-shaped fixed plate 501 mounted on the upper surface of the U-shaped base 1, the inner side wall of the L-shaped fixed plate 501 is provided with a clamping groove, the inner wall of the clamping groove of the L-shaped fixed plate 501 is provided with a hydraulic cylinder two 502, the output end of the hydraulic cylinder two 502 is provided with a sliding plate 505, the upper surface of the sliding plate 505 is provided with a clamping groove, the clamping groove of the sliding plate 505 is clamped with a spray head 506, the upper surface of the L-shaped fixed plate 501 is provided with a storage box 503, the storage box 503 is provided with a material guide pipe 504, and the material guide pipe 504 is arranged in the material inlet of the spray head 506. Specifically, the hydraulic cylinder two 502 is started to drive the sliding plate 505 to move up and down to drive the spray head 506, the position of the spray head 506 is adjusted and moved to the single-chip microcomputer spraying range on the upper end of the top plate 204, so that the coating sprayed by the subsequent spray head 506 is quickly sprayed to the surface of the single-chip microcomputer, thereby avoiding the coating sprayed by the subsequent spray head 506 from being blown by the air flow to cause resource waste, thereby improving the practicability of the device.

[0031] As shown in Figure 1 The recesses are arranged on one side of each of the two groups of bidirectional screws 206, and the recesses are provided with a strip-shaped pressure sensor 6. The lower surfaces of the two groups of strip-shaped pressure sensors 6 are parallel to the upper surface of the top plate 204, and the two groups of strip-shaped pressure sensors 6 are electrically connected to the control end of the motor one 209. Specifically, the two groups of strip-shaped pressure sensors 6 are arranged on the left and right sides of the single-chip microcomputer placed on the upper end of the top plate 204, so that when the adjacent sides of the two groups of top plates 204 abut to the left and right sides of the single-chip microcomputer, the two groups of strip-shaped pressure sensors 6 are triggered to close the motor one 209, thereby avoiding excessive adjustment of the position of the two groups of top plates 204 by the subsequent worker to cause damage to the single-chip microcomputer.

[0032] As shown in Figure 1 and Figure 2 The front surface of the fixed block one 201 is provided with two groups of through holes, and the two groups of through holes are slidably connected with a limiting rod 4. The back surfaces of the two groups of limiting rods 4 are mounted on the front surface of the fixed block two 202. Specifically, the two groups of limiting rods 4 are slidably connected in the two groups of through holes of the fixed block one 201, so that the subsequent two groups of limiting rods 4 limit the movement path of the fixed block one 201, thereby avoiding the up and down movement of the position of the top plate 204 to cause the bending of the electric telescopic rod 203, and thereby improving the service life of the electric telescopic rod 203.

[0033] In summary: by starting the hydraulic cylinder 308 to push the slider 309, the position of the multiple sets of cleaning brushes 305 is quickly adjusted and moved to abut the upper surface of the single-chip microcomputer, and then by starting the motor 301 to drive the fixed rod 304 and the multiple sets of cleaning brushes 305 to rotate, so that the subsequent multiple sets of cleaning brushes 305 clean the dust accumulated on the upper surface of the single-chip microcomputer in the process of rotation, and the dust floating in the cleaning process of the single-chip microcomputer is sucked into the inside of the two sets of air suction pipes 302 by starting the dust collector 303, so as to avoid the subsequent floating dust from accumulating on the upper surface of the single-chip microcomputer again in the subsequent sedimentation process, thereby improving the cleaning efficiency of the device; by starting the hydraulic cylinder 502 to push the sliding plate 505 to drive the nozzle 506 to move up and down, the position of the nozzle 506 is adjusted and moved to the spraying range of the single-chip microcomputer on the upper end of the top plate 204, so that the paint sprayed by the subsequent nozzle 506 is quickly sprayed to the surface of the single-chip microcomputer, thereby avoiding the waste of resources caused by the paint sprayed by the subsequent nozzle 506 being blown by the air flow.

[0034] At the same time, by starting the motor 209 to drive the bevel gear 210 and the bevel gear 207 to trigger the side plate 205 to rotate inside the top plate 204, the side plate 205 drives the two sets of bidirectional screws 206 to slide inside the clamping groove of the top plate 204 in the process of rotation, so that the subsequent two sets of bidirectional screws 206 are clamped and connected to the left and right sides of the single-chip microcomputer in the process of movement, and then by starting the electric telescopic rod 203 to pull the fixed block 201 to drive the top plate 204 to move, the single-chip microcomputer on the upper end of the top plate 204 is adjusted and moved to the lower end of the coating mechanism 5, thereby avoiding the movement of the subsequent single-chip microcomputer in the process of cleaning and coating. The above shows and describes the basic principle, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A single-chip surface coating device comprising a U-shaped base (1), characterized in that: The left and right inner walls of the U-shaped base (1) are provided with clamping grooves, the inside of the U-shaped base (1) is provided with a clamping mechanism (2) for positioning the single-chip microcomputer coating position, the upper surface of the U-shaped base (1) is provided with a cleaning mechanism (3) and a coating mechanism (5), the position of the cleaning mechanism (3) is located at the front end of the coating mechanism (5), and the position of the clamping mechanism (2) is located at the lower end of the cleaning mechanism (3) and the coating mechanism (5).

2. A single-chip microcomputer surface coating device according to claim 1, characterized by: The clamping mechanism (2) comprises a fixed block one (201), a fixed block two (202) and a top plate (204), the top plate (204) is slidably connected inside the two groups of clamping grooves of the U-shaped base (1), the fixed block two (202) is installed at the bottom of the inner wall of the U-shaped base (1), the fixed block one (201) is installed on the lower surface of the top plate (204), the front surface of the fixed block two (202) is provided with an electric telescopic rod (203), the output end of the electric telescopic rod (203) is installed on the back surface of the fixed block one (201), the upper surface of the top plate (204) is provided with a clamping groove, the left and right inner walls of the clamping groove of the top plate (204) are provided with through holes, two groups of bidirectional screws (206) are rotatably connected inside the two groups of through holes of the top plate (204), the outer threads of the bidirectional screws (206) are connected with two groups of side plates (205), the lower surface of the top plate (204) is provided with an L-shaped connecting block (208), the inner wall bottom of the L-shaped connecting block (208) is installed with a motor one (209), the output shaft of the motor one (209) is installed with a conical gear two (210), the outer teeth of the conical gear two (210) are meshingly connected with a conical gear one (207), and the conical gear one (207) is installed on the outer surface of the side plate (205).

3. A single-chip microcomputer surface coating device according to claim 1, characterized in that: The cleaning mechanism (3) comprises a U-shaped fixed plate (310) installed on the upper surface of the U-shaped base (1), a clamping groove is formed in the right inner side wall of the U-shaped fixed plate (310), a hydraulic cylinder (308) is installed on the inner wall top of the clamping groove of the U-shaped fixed plate (310), a sliding block (309) is installed on the output end of the hydraulic cylinder (308), the sliding block (309) is slidingly connected in the clamping groove of the U-shaped fixed plate (310), a motor (301) is arranged on the side of the sliding block (309) away from the U-shaped fixed plate (310), a recess is formed in the inner part of the sliding block (309), a fixed rod (304) is installed on the output shaft of the motor (301) penetrating through the inner recess of the sliding block (309), a plurality of cleaning brushes (305) are arranged on the outer surface of the fixed rod (304), a dust collector (303) is installed on the upper surface of the U-shaped fixed plate (310), air suction pipes (302) are installed on the front and rear sides of the U-shaped fixed plate (310), a dust suction pipe (306) is installed on the air suction end of the dust collector (303), air suction holes are formed on the front and rear sides of the dust suction pipe (306), and connecting pipes (307) are inserted into the inner parts of the two groups of air suction holes of the dust suction pipe (306), and the air suction ends of the two groups of connecting pipes (307) are installed in the air exhaust holes of the two groups of air suction pipes (302).

4. A single-chip microcomputer surface coating device according to claim 1, characterized by: The coating mechanism (5) comprises an L-shaped fixed plate (501) installed on the upper surface of the U-shaped base (1), a clamping groove is formed in the inner side wall of the L-shaped fixed plate (501), a hydraulic cylinder (502) is arranged on the inner wall top of the clamping groove of the L-shaped fixed plate (501), a sliding plate (505) is installed on the output end of the hydraulic cylinder (502), a clamping groove is formed in the upper surface of the sliding plate (505), a spray head (506) is clamped in the clamping groove of the sliding plate (505), a storage box (503) is arranged on the upper surface of the L-shaped fixed plate (501), a material guide pipe (504) is installed on the material guide end of the storage box (503), and the material guide end of the material guide pipe (504) is installed in the material inlet of the spray head (506).

5. A single-chip microcomputer surface coating device according to claim 2, characterized by: The recesses are formed on the adjacent sides of the two groups of bidirectional screws (206), the strip-shaped pressure sensors (6) are arranged in the recesses of the two groups of bidirectional screws (206), the positions of the lower surfaces of the two groups of strip-shaped pressure sensors (6) are parallel to the position of the upper surface of the top plate (204), and the control ends of the two groups of strip-shaped pressure sensors (6) and the motor (209) are electrically connected.

6. A single-chip surface coating device according to claim 2, wherein: The front surface of the fixed block one (201) is provided with two groups of through holes, the two groups of through holes of the fixed block one (201) are slidingly connected with limiting rods (4), and the back surfaces of the two groups of limiting rods (4) are installed on the front surface of the fixed block two (202).

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