CN211160860U

CN211160860U - Precision part pouring mold

Info

Publication number: CN211160860U
Application number: CN201921726207.1U
Authority: CN
Inventors: 李计兵
Original assignee: Shenzhen Chuangyijing Technology Co ltd
Current assignee: Shenzhen Chuangyijing Technology Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-08-04
Anticipated expiration: 2029-10-15

Abstract

The utility model relates to the technical field of machining accessories, in particular to a precision part pouring mold; the working modes are various, the placing groove can be cleaned regularly, and the influence of particle impurities attached to the inner side of the groove on the working effect of the device can be prevented; the automatic feeding device comprises a placing rack, a first reciprocating screw rod, a second reciprocating screw rod and two groups of push plates, wherein a placing groove is formed in the top end of the placing rack, two groups of movable rods are respectively arranged at the output ends of the two groups of reciprocating screw rods, and the two groups of push plates are respectively and fixedly arranged on the two groups of movable rods; the cleaning roller is characterized by further comprising a supporting rod, a top plate, a connecting frame, a driving plate, a connecting plate, a servo motor, a mounting plate, a movable motor, a movable frame, a fan and a cleaning roller, wherein the outer side wall of the supporting rod is connected with the inner side wall of the ball bearing, the output end of the servo motor is provided with the connecting roller, a transmission gear is arranged on the connecting roller, the output end of the movable motor is provided with a transmission shaft, the driving plate is fixedly mounted on the transmission shaft, and a plurality of groups.

Description

Precision part pouring mold

Technical Field

The utility model relates to a technical field of machining auxiliary device especially relates to a precision part pouring die.

Background

As is well known, a precision part casting mold is a device for placing and molding a hot-melt raw material for machining precision mechanical parts so that the surface shape and size of the cooled raw material meet the production and machining requirements, and is widely used in the field of machining; the existing precision part pouring mold comprises a placing frame, a first reciprocating screw rod, a second reciprocating screw rod and two groups of push plates, wherein a placing groove is formed in the top end of the placing frame, the first reciprocating screw rod and the second reciprocating screw rod are fixedly installed on the left side and the right side of the top end of the placing frame respectively, two groups of movable rods are arranged at the output ends of the two groups of reciprocating screw rods respectively, the two groups of push plates are fixedly installed on the two groups of movable rods respectively, two groups of recovery grooves are formed in the left side and the right side of the top end of the placing frame respectively, two groups of discharge pipes are communicated with the two groups of recovery grooves respectively, and a discharge; when the existing precision part pouring mold is used, a user places hot melting raw materials required by work in a placing groove, a first reciprocating screw rod and a second reciprocating screw rod are opened to respectively drive two groups of movable rods to move and drive two groups of push plates to move, a movable plate moves above a placing rack to clean redundant waste materials into a recovery groove, the hot melting raw materials in the placing groove are naturally dried and cooled in the placing groove, and the hot melting raw materials are cooled and formed in the placing groove; however, the existing casting mold for precision parts is found in use, the working mode is single, the placing groove is inconvenient to be cleaned regularly, and the influence on the working effect of the device caused by the particle impurities attached to the inner side of the placing groove is easy to cause, so that the use reliability is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a mode is comparatively various, conveniently carries out periodic cleanness to the standing groove in, can prevent that the inslot side from adhering to particle impurity and causing the influence to the working effect of device to improve its precision part of using the reliability and pour the mould.

The utility model discloses an accurate part pouring mould, including rack, first reciprocal lead screw, second reciprocal lead screw and two sets of push pedals, the top of rack is provided with the standing groove, first reciprocal lead screw and second reciprocal lead screw fixed mounting are respectively on the left side and the right side of rack top, and the output of two sets of reciprocal lead screws is provided with two sets of movable rods respectively, two sets of push pedals are respectively fixed mounting on two sets of movable rods, left side and right side at the rack top are provided with two sets of accumulator tanks respectively, and communicate respectively on two sets of accumulator tanks and be provided with two sets of row material pipes, and all be provided with the relief valve on every group row material pipe; the cleaning device also comprises a support rod, a top plate, a connecting frame, a driving plate, a connecting plate, a servo motor, a mounting plate, a movable motor, a movable frame, a fan, a cleaning roller and a movable plate, wherein the top end of the placing frame is fixedly provided with a ball bearing, the outer side wall of the support rod is connected with the inner side wall of the ball bearing, the bottom end of the support rod is connected with the top plate, the connecting frame is fixedly arranged at the bottom end of the top plate, the bottom end of the connecting frame is provided with a connecting groove, the servo motor is fixedly arranged on the side wall of the connecting groove, the output end of the servo motor is provided with the connecting roller, the connecting roller is provided with a transmission gear, the side wall of the connecting plate is fixedly provided with a fixed plate, the fixed plate is provided with a plurality of groups of, the movable plate is fixedly installed on the transmission shaft, a movable hole is formed in the movable plate, the movable frame is clamped in the movable hole, the fan is fixedly installed on the movable frame, the clamping plate is arranged at the bottom end of the transmission shaft, the cleaning roller is installed at the bottom end of the clamping plate, and multiple groups of bristles are arranged on the cleaning roller.

The utility model discloses an accurate part pouring die utensil still includes that slide rail and activity are detained, and slide rail fixed mounting is in the bottom of mounting panel, the bottom of slide rail is provided with the spout, and the activity is detained the fixed mounting on the top of adjustable shelf, the activity is detained the card and is adorned in the spout, and the activity is detained the top and is provided with the pulley, pulley and spout top contact.

The utility model discloses an accurate part pouring die still includes two sets of spacing framves and two sets of cushions, and two sets of spacing framves are left side and right side fixed mounting in the spread groove respectively, and are two sets of spacing frame's bottom is provided with two sets of spacing grooves respectively, and the top of connecting plate and driving plate is fixed respectively and is provided with two sets of gag lever posts, and two sets of gag lever posts top inserts respectively to two sets of gag lever posts, and two sets of cushions are installed respectively in two sets of spacing frame bottoms to the inside wall of two sets of cushions contacts with the lateral wall of two sets of gag lever posts respectively.

The utility model discloses an accurate part pouring die utensil still includes two sets of pull rods, two sets of drive frame and four fixed knots of group, the front side and the rear side of rack left end and right-hand member are fixed respectively and are provided with two sets of fore-stocks and two sets of after-poppet, the rear end of two sets of fore-stocks and the front end of two sets of after-poppet are provided with four movable grooves of group respectively, four fixed knots of group are fixed mounting respectively at the front end and the rear end of two sets of drive frames, four fixed knots of group insert respectively to four movable grooves of group, two sets of pull rods are fixed mounting respectively on the top of two sets of drive frames.

The utility model discloses an accurate part pouring die still includes four group's landing legs, four group's landing legs respectively fixed mounting in left front side, right front side, left rear side and right rear side of rack bottom, four groups the landing leg bottom all is provided with the base, and the bottom of every group base all is provided with multiunit antiskid line.

The utility model discloses a mould is pour to precision part still includes rack and reposition of redundant personnel motor, and rack fixed mounting is at the output of fan, and reposition of redundant personnel motor fixed mounting is on the top of rack, the top output of reposition of redundant personnel motor is provided with the movable roller to be provided with the multiunit flow distribution plate on the lateral wall of movable roller.

The utility model discloses a mould is pour to precision part still includes two sets of electric heating rods and two sets of guide plates, and two sets of guide plates are fixed mounting respectively in the bottom of two sets of accumulator tanks, two sets of electric heating rods are fixed mounting respectively on the lateral wall of two sets of accumulator tanks.

The utility model discloses an accurate part pouring die, still including pressing from both sides cover, nylon pad and nylon hook area, press from both sides cover fixed mounting on the lateral wall of rack, the top that presss from both sides the cover is provided with accomodates the groove, nylon pad and nylon hook area fixed mounting respectively are on the left side wall and the right side wall of accomodating the groove.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a device, including ball bearing, connecting plate, movable motor, fan work, bracing piece, servo motor work accessible connecting roller, mounting panel and movable motor, the connecting plate is connected to the fixed plate, the connecting plate is connected to the servo motor work accessible connecting roller, and the mounting panel is moved to suitable high position with movable motor simultaneously through the fixed plate removal, movable motor work can drive the fly leaf and rotate and drive connecting frame and fan through the fly leaf and remove, fan work can clear up in the standing groove, the transmission shaft rotates the rotatory clean roller that drives simultaneously of accessible cardboard and rotates, clean roller rotates and can drive the multiunit brush hair and remove, the mode is comparatively various, conveniently carry out periodic cleaning to the standing groove, can prevent that the inboard attached particle impurity.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a structural schematic view of the mounting plate from below;

FIG. 3 is a schematic view of the structure of the connecting frame and the mounting plate and the bristles;

FIG. 4 is a schematic view of a ball bearing;

in the drawings, the reference numbers: 1. placing a rack; 2. a first reciprocating screw; 3. a second reciprocating screw; 4. pushing the plate; 5. a discharge valve; 6. a support bar; 7. a top plate; 8. a connecting frame; 9. a connecting plate; 10. a servo motor; 11. mounting a plate; 12. a movable motor; 13. a movable frame; 14. a fan; 15. a fixing plate; 16. a transmission gear; 17. a movable plate; 18. clamping a plate; 19. brushing; 20. a slide rail; 21. a movable buckle; 22. a limiting frame; 23. a limiting rod; 24. a pull rod; 25. driving the frame; 26. a front bracket; 27. a support leg; 28. a base; 29. a net frame; 30. a movable roller; 31. a flow distribution plate; 32. an electrical heating rod; 33. a baffle; 34. a jacket; 35. a nylon pad; 36. ball bearings.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the utility model discloses a precision part pouring mold, including rack 1, first reciprocating screw 2, second reciprocating screw 3 and two sets of push pedal 4, the top of rack 1 is provided with the standing groove, first reciprocating screw 2 and second reciprocating screw 3 are respectively fixedly mounted on the left side and the right side of the top of rack 1, and the output end of two sets of reciprocating screws is respectively provided with two sets of movable rods, two sets of push pedal 4 are respectively fixedly mounted on two sets of movable rods, two sets of recovery grooves are respectively provided on the left side and the right side of the top of rack 1, and two sets of discharge pipes are respectively provided on two sets of recovery grooves in a communicating manner, and a discharge valve 5 is provided on each set of discharge pipes; the cleaning and cleaning device also comprises a supporting rod 6, a top plate 7, a connecting frame 8, a driving plate, a connecting plate 9, a servo motor 10, a mounting plate 11, a movable motor 12, a movable frame 13, a fan 14, a cleaning roller and a movable plate 17, wherein a ball bearing 36 is fixedly arranged at the top end of the placing frame 1, the outer side wall of the supporting rod 6 is connected with the inner side wall of the ball bearing 36, the bottom end of the supporting rod 6 is connected with the top plate 7, the connecting frame 8 is fixedly arranged at the bottom end of the top plate 7, a connecting groove is arranged at the bottom end of the connecting frame 8, the servo motor 10 is fixedly arranged on the side wall of the connecting groove, the output end of the servo motor 10 is provided with the connecting roller, a transmission gear 16 is arranged on the connecting roller, a fixing plate 15 is fixedly arranged on the side wall of, the movable motor 12 is arranged in the mounting groove, the output end of the movable motor 12 is provided with a transmission shaft, the movable plate 17 is fixedly arranged on the transmission shaft, the movable plate 17 is provided with a movable hole, the movable frame 13 is clamped in the movable hole, the fan 14 is fixedly arranged on the movable frame 13, the bottom end of the transmission shaft is provided with a clamping plate 18, the cleaning roller is arranged at the bottom end of the clamping plate 18, and the cleaning roller is provided with a plurality of groups of bristles 19; the utility model discloses a device, including ball bearing, connecting plate, movable motor, fan work, bracing piece, servo motor work accessible connecting roller, mounting panel and movable motor, the connecting plate is connected to the fixed plate, the connecting plate is connected to the servo motor work accessible connecting roller, and the mounting panel is moved to suitable high position with movable motor simultaneously through the fixed plate removal, movable motor work can drive the fly leaf and rotate and drive connecting frame and fan through the fly leaf and remove, fan work can clear up in the standing groove, the transmission shaft rotates the rotatory clean roller that drives simultaneously of accessible cardboard and rotates, clean roller rotates and can drive the multiunit brush hair and remove, the mode is comparatively various, conveniently carry out periodic cleaning to the standing groove, can prevent that the inboard attached particle impurity.

The utility model discloses a precision part pouring mould, still include slide rail 20 and activity are detained 21, slide rail 20 is fixed to be installed in the bottom of mounting panel 11, the bottom of slide rail 20 is provided with the spout, activity is detained 21 and is fixed to be installed in the top of movable frame 13, activity is detained 21 and is clamped in the spout, activity is detained 21 the top and is provided with the pulley, the pulley contacts with spout top; the slide rail can be injectd the moving direction of activity knot and link, can ensure the moving direction of fan in the mounting panel top, can improve the practicality of device.

The utility model discloses a precision part pouring mold, still include two sets of spacing frame 22 and two sets of cushions, two sets of spacing frame 22 are fixed mounting respectively on the left side and the right side in the spread groove, two sets of spacing grooves are provided with respectively to the bottom of two sets of spacing frame 22, connecting plate 9 and the top of driving the board are fixed being provided with two sets of gag lever posts 23 respectively, two sets of gag lever posts 23 top are inserted respectively to two sets of gag lever posts in, two sets of cushions are installed respectively in two sets of spacing frame 22 bottoms, and the inside wall of two sets of cushions contacts with the lateral wall of two sets of gag lever posts 23 respectively; the limiting frame can limit the limiting rod, so that the moving stability of the connecting plate and the driving plate can be improved, and the use reliability of the device is improved.

The utility model discloses a precision parts pouring mould, still include two sets of pull rods 24, two sets of drive racks 25 and four groups of fixed buckles, rack 1 left end and right-hand member's front side and rear side are fixed respectively and are provided with two sets of front truck 26 and two sets of after-poppet, two sets of front truck 26's rear end and two sets of after-poppet's front end are provided with four groups of movable grooves respectively, four groups of fixed buckles are fixed respectively in two sets of drive racks 25's front end and rear end, four groups of fixed buckles insert respectively into four groups of movable grooves, two groups of pull rods 24 are fixed respectively in two sets of drive racks 25's top; the user removes the adjustable activity of drive frame and detains the angle of inserting to the activity inslot portion, and the user removes the pull rod and can drive the drive frame and remove and drive the rack through fore-stock and after-poppet and remove to conveniently remove the device whole to suitable operating position.

The utility model discloses a precision part pouring mould, still include four groups of landing legs 27, four groups of landing legs 27 are fixedly installed respectively in the left front side, right front side, left rear side and right rear side of rack 1 bottom, and four groups of landing legs 27 bottom all is provided with base 28, and the bottom of each group of base 28 all is provided with multiunit anti-skidding line; the base and the supporting legs can support the placing frame to improve stability of the placing frame when the placing frame is placed, and therefore working accuracy of the device is improved.

The utility model discloses a precision parts pouring mould, still include rack 29 and reposition of redundant personnel motor, rack 29 fixed mounting is at the output of fan 14, and reposition of redundant personnel motor fixed mounting is on the top of rack 29, and the top output of reposition of redundant personnel motor is provided with movable roller 30 to be provided with multicomponent flow board 31 on the lateral wall of movable roller 30; the work of the shunt motor can drive the movable roller to rotate and drive the shunt plate to move, and the shunt plate can disperse the output wind power of the fan.

The utility model discloses a precision part pouring mould, which also comprises two groups of electric heating rods 32 and two groups of guide plates 33, wherein the two groups of guide plates 33 are respectively and fixedly arranged at the bottom ends of the two groups of recovery tanks, and the two groups of electric heating rods 32 are respectively and fixedly arranged on the side walls of the two groups of recovery tanks; the electric heating rod can heat the hot melt waste materials recovered in the recovery tank, so that the hot melt waste materials are prevented from being rapidly condensed and blocked in the recovery tank.

The utility model discloses a precision part pouring mold, still include jacket 34, nylon cushion 35 and nylon hook belt, jacket 34 is fixed to be installed on the lateral wall of rack 1, the top of jacket 34 is provided with the groove of accomodating, nylon cushion 35 and nylon hook belt are fixed to be installed respectively on the left lateral wall and the right lateral wall of accomodating the groove; the user can place the label paper of recorder work information in accommodating the groove to the user looks over the work information of device when needing, brings the facility for the user.

The utility model relates to a precision part pouring mould, when in operation, a user firstly moves a driving frame to adjust the angle of a movable buckle inserted into a movable groove, the user moves a pull rod to drive the driving frame to move and drive a placing frame to move through a front support and a rear support so as to conveniently move the whole device to a proper working position, a base and a support leg can support the placing frame so as to improve the stability when placing the placing frame, a rotary support rod on a ball bearing can move a connecting frame to a proper position, a servo motor can drive a transmission gear to rotate through a connecting roller so as to drive the connecting plate to move through a fixed plate and simultaneously move the mounting plate and a movable motor to a proper height position, the movable motor can drive a movable plate to rotate and drive the connecting frame and a fan to move through the movable plate, and the fan can clean the placing groove, the transmission shaft can rotate through the clamping plate and simultaneously drive the cleaning roller to rotate, the cleaning roller can drive a plurality of groups of bristles to move through rotation, the working modes are various, regular cleaning in the placing groove is convenient, a user places hot melting raw materials required by working in the placing groove, the first reciprocating screw rod and the second reciprocating screw rod are opened to respectively drive two groups of movable rods to move and simultaneously drive two groups of push plates to move, the movable plates move above the placing frame to clean redundant waste materials into the recovery groove, the hot melting raw materials in the placing groove are naturally air-dried and cooled in the placing groove, the hot melting raw materials are cooled and formed in the placing groove, the limiting frame can limit the limiting rods, the moving stability of the connecting plate and the driving plate can be improved, the use reliability of the device is improved, the shunting motor can drive the movable rollers to rotate and simultaneously drive the shunting plates to move, the flow distribution plate moves to disperse the output wind power of the fan, the electric heating rod can heat the hot melting waste materials recovered in the recovery tank, the hot melting waste materials are prevented from being rapidly condensed and blocked in the recovery tank, and a user can place the label paper of the working information of the recording device in the storage tank, so that the user can check the working information of the device when needed, and convenience is brought to the user.

In the casting mold for precision parts of the present invention, in the case where no description is given to the contrary, "upper, lower, left, right, front, rear, inner, outer, vertical, horizontal" and the like are included in the term, the term only represents the orientation of the term in the normal use state, or be a trivial term understood by those skilled in the art, and should not be considered as limiting the term, at the same time, the terms "first," "second," and "()" do not denote any particular quantity or order, but rather are used to distinguish one name from another, furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A precision part pouring mold comprises a placing frame (1), a first reciprocating lead screw (2), a second reciprocating lead screw (3) and two groups of push plates (4), wherein a placing groove is formed in the top end of the placing frame (1), the first reciprocating lead screw (2) and the second reciprocating lead screw (3) are respectively and fixedly installed on the left side and the right side of the top end of the placing frame (1), two groups of movable rods are respectively arranged at the output ends of the two groups of reciprocating lead screws, the two groups of push plates (4) are respectively and fixedly installed on the two groups of movable rods, two groups of recovery grooves are respectively formed in the left side and the right side of the top end of the placing frame (1), two groups of discharge pipes are respectively communicated with the two groups of recovery grooves, and a discharge valve (5); the cleaning device is characterized by further comprising a supporting rod (6), a top plate (7), a connecting frame (8), a driving plate, a connecting plate (9), a servo motor (10), a mounting plate (11), a movable motor (12), a movable frame (13), a fan (14), a cleaning roller and a movable plate (17), wherein a ball bearing (36) is fixedly arranged at the top end of the placing frame (1), the outer side wall of the supporting rod (6) is connected with the inner side wall of the ball bearing (36), the bottom end of the supporting rod (6) is connected with the top plate (7), the connecting frame (8) is fixedly arranged at the bottom end of the top plate (7), a connecting groove is formed in the bottom end of the connecting frame (8), the servo motor (10) is fixedly arranged on the side wall of the connecting groove, the output end of the servo motor (10) is provided with the connecting roller, a transmission gear (16) is, be provided with the multiunit on fixed plate (15) and drive the groove, connecting plate (9) bottom is connected with the drive board, and mounting panel (11) fixed mounting is provided with the mounting groove in drive board bottom, mounting panel (11), and activity motor (12) are installed in the mounting groove, the output of activity motor (12) is provided with the transmission shaft, and fly leaf (17) fixed mounting is provided with the activity hole on fly leaf (17), and activity frame (13) clamp in the activity hole, fan (14) fixed mounting is on activity frame (13), and the transmission shaft bottom is provided with cardboard (18), and the bottom at cardboard (18) is installed to the cleaning roller, be provided with multiunit brush hair (19) on the cleaning roller.

2. The casting mold for the precision parts according to claim 1, further comprising a sliding rail (20) and a movable buckle (21), wherein the sliding rail (20) is fixedly installed at the bottom end of the mounting plate (11), the bottom end of the sliding rail (20) is provided with a sliding groove, the movable buckle (21) is fixedly installed at the top end of the movable frame (13), the movable buckle (21) is clamped in the sliding groove, and the top end of the movable buckle (21) is provided with a pulley which is in contact with the top end of the sliding groove.

3. The precision part casting mold according to claim 2, further comprising two sets of position limiting frames (22) and two sets of rubber pads, wherein the two sets of position limiting frames (22) are respectively and fixedly installed on the left side and the right side in the connecting groove, the two sets of position limiting grooves are respectively formed in the bottom ends of the two sets of position limiting frames (22), the two sets of position limiting rods (23) are respectively and fixedly installed on the top ends of the connecting plate (9) and the driving plate, the top ends of the two sets of position limiting rods (23) are respectively inserted into the two sets of position limiting grooves, the two sets of rubber pads are respectively installed at the bottom ends of the two sets of position limiting frames (22), and the inner side walls of the two sets of rubber pads are.

4. The precision part casting mold according to claim 3, further comprising two sets of pull rods (24), two sets of driving frames (25) and four sets of fixing buckles, wherein the front side and the rear side of the left end and the right end of the placing frame (1) are respectively and fixedly provided with two sets of front supports (26) and two sets of rear supports, the rear ends of the two sets of front supports (26) and the front ends of the two sets of rear supports are respectively provided with four sets of movable grooves, the four sets of fixing buckles are respectively and fixedly installed at the front ends and the rear ends of the two sets of driving frames (25), the four sets of fixing buckles are respectively inserted into the four sets of movable grooves, and the two sets of pull rods (24) are respectively and fixedly installed at the top ends of the two sets of driving frames (25).

5. The casting mold for the precision parts as claimed in claim 4, further comprising four sets of legs (27), wherein the four sets of legs (27) are respectively and fixedly installed at the left front side, the right front side, the left rear side and the right rear side of the bottom end of the placing rack (1), the bottom ends of the four sets of legs (27) are provided with bases (28), and the bottom end of each set of bases (28) is provided with multiple sets of anti-skid patterns.

6. The casting mold for the precision parts as claimed in claim 5, further comprising a net rack (29) and a shunt motor, wherein the net rack (29) is fixedly installed at the output end of the fan (14), the shunt motor is fixedly installed at the top end of the net rack (29), the output end of the top of the shunt motor is provided with a movable roller (30), and the outer side wall of the movable roller (30) is provided with a multi-component flow plate (31).

7. The casting mold for precision parts according to claim 6, further comprising two groups of electric heating rods (32) and two groups of guide plates (33), wherein the two groups of guide plates (33) are respectively and fixedly installed at the bottom ends of the two groups of recovery grooves, and the two groups of electric heating rods (32) are respectively and fixedly installed on the side walls of the two groups of recovery grooves.

8. The casting mold for the precision parts as claimed in claim 7, further comprising a jacket (34), a nylon pad (35) and a nylon hook tape, wherein the jacket (34) is fixedly installed on the side wall of the placing rack (1), the top end of the jacket (34) is provided with a receiving groove, and the nylon pad (35) and the nylon hook tape are respectively and fixedly installed on the left side wall and the right side wall of the receiving groove.