CN211276398U

CN211276398U - Automatic barbell rod forging press

Info

Publication number: CN211276398U
Application number: CN201921914309.6U
Authority: CN
Inventors: 洪维钧
Original assignee: Rudong Fengli Machinery Factory Co ltd
Current assignee: Rudong Fengli Machinery Factory Co ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-08-18
Anticipated expiration: 2029-11-07

Abstract

The utility model relates to an automatic barbell bar forging press, use in the metalworking field, it includes the base station, the central authorities of base station are equipped with pulls feed mechanism, it is equipped with clamping mechanism along base station length direction's both ends symmetry to pull feed mechanism, it all is equipped with the guide rail on the direction that two clamping mechanism kept away from each other on the base station, be equipped with respectively on the guide rail and remove the frame, be equipped with forging and pressing device on removing the frame, it is equipped with the heating ring towards one side of feeding direction to remove the frame to be located forging and pressing device, base station length direction's both ends difference fixedly connected with first cylinder, two remove the frame respectively with the piston rod fixed connection of two first cylinders. The utility model discloses have and pull feed mechanism and pull the feeding to the blank through the setting to preheat the blank through the heating ring behind the fixed blank of clamping mechanism, forge and press the blank through the forging and pressing device at last, process automation operates, has reduced staff's work load, and has promoted work efficiency's effect.

Description

Automatic barbell rod forging press

Technical Field

The utility model belongs to the technical field of metalworking's technique and specifically relates to an automatic barbell bar forging press is related to.

Background

Forging presses are devices used for metal and mechanical cold working that change only the outer shape of the metal. The forging press comprises a plate bending machine, a plate shearing machine, a punch press, a press machine, a hydraulic press, an oil press, a bending machine and the like. Cold working refers to a process in which a metal undergoes plastic deformation at a temperature lower than the recrystallization temperature, such as cold rolling, cold drawing, cold forging, stamping, cold extrusion, and the like. The resistance to cold working deformation is high, and the hardness and strength of the work can be improved by work hardening while the metal is being formed.

Nowadays, with the development of society and economy, the body-building sports is more and more taken attention by the public, so the demand of the body-building equipment is increased. As a commonly used fitness apparatus, the barbell has a large demand, and a steel rod-shaped blank is generally adopted to process a convex ring which is used for blocking and positioning a barbell weight plate on the barbell by a forging method in cold machining.

The processing mode of current barbell pole often is that the processing part of rod-like blank stretches into heating device through bare-handed or centre gripping instrument at first preheats, then takes out and puts into forging and pressing device and forge and press the processing part, and this kind of whole mode through staff manually operation is wasted time and energy, influences machining efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automatic barbell bar forging press of automatic processing, which aims to overcome the defects of the prior art.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

an automatic barbell bar forging press comprises a base station, wherein the center of the base station is provided with a traction feeding mechanism, the two ends of the traction feeding mechanism along the length direction of the base platform are symmetrically provided with clamping mechanisms, guide rails are arranged on the base platform in the direction that the two clamping mechanisms are far away from each other, the guide rails are respectively provided with a movable frame, the movable frame is provided with a forging device, the feed holes of the two forging devices respectively face to the center of the length direction of the base station, the moving frame is provided with heating rings at one side of the forging device facing the feeding direction, the axes of the two heating rings are respectively parallel to the length direction of the base station, the two ends of the base station in the length direction are fixedly connected with first cylinders respectively, piston rods of the first cylinders are parallel to the length direction of the base station respectively and extend towards the directions close to each other, and the moving frame is fixedly connected with the piston rods of the two first cylinders respectively.

Through adopting above-mentioned technical scheme, in the actual production process, the staff places the barbell bar blank on pulling feed mechanism to through pulling feed mechanism bearing blank and pulling along the width direction of blank along the base station to the base station feeding, pull feed mechanism and keep blank axis and base station direction level in the feeding process. The traction feeding mechanism firstly moves the blank to a position coaxial with the heating ring, piston rods of the two first cylinders extend out to enable the heating ring to be sleeved on the blank and move to a position to be machined, the blank is preheated before being forged and pressed, the plasticity of the blank is improved, when the blank reaches a preset temperature after a certain time, the piston rods of the first cylinders retract, the heating ring withdraws from the blank, then the traction feeding mechanism is used for continuously driving the blank to move, the axis of the blank is aligned with a feeding hole of the forging and pressing device, then the piston rods of the first cylinders extend out again to enable the forging and pressing device to be sleeved on the blank, then the forging and pressing device is used for forging and pressing the machining position of the blank, and after the forging and pressing are finished, the first cylinders retract to enable the blank to be separated from the forging and. The automatic motion process of carrying out the blank need not artifical repetition and aligns and fix a position between blank and heating ring or forging device's feed port, has saved the manpower and has practiced thrift the time, has promoted machining efficiency.

The utility model discloses further set up to: draw feed mechanism includes second cylinder and support frame, support frame fixed connection is in base station length direction's central point, on the piston rod of support frame fixed connection and second cylinder, the support frame is equipped with the centre gripping frame on the lateral wall of one side of direction of feed, the centre gripping frame is "T" font frame, the "T" font open end of centre gripping frame is towards the direction of feed, the centre gripping frame is located one side of direction of feed on the bottom plate of "T" font downside and is equipped with the dog, the dog is parallel with the riser of centre gripping frame "T" font, the dog all is equipped with the cambered surface radius towards the inside and outside both sides of centre gripping frame.

Through adopting above-mentioned technical scheme, when the piston rod of second cylinder stretches out, the base station is stretched out to the centre gripping frame, and the staff of being convenient for places the blank in the centre gripping frame, and through the motion behind the dog restriction blank entering centre gripping frame, makes the blank keep parallel with base station length direction, thereby the piston rod of second cylinder progressively retracts and drives the blank and accomplish the feeding action, through setting up the cambered surface radius, during the staff material loading blank slides in the centre gripping frame to the feeding of being convenient for.

The utility model discloses further set up to: the clamping mechanism comprises a clamping table, the clamping table is located on a base station, a groove is formed in one side, facing the feeding direction, of the top surface of the clamping table, a bearing groove with a semicircular cross section is formed in the groove wall below the groove, a supporting table is fixedly connected to the clamping table, a hydraulic cylinder is fixedly connected to the supporting table, a piston rod of the hydraulic cylinder vertically extends downwards, a compression block is fixedly connected to the piston rod of the hydraulic cylinder, and the shape of the compression block is matched with that of the groove.

Through adopting above-mentioned technical scheme, through setting up the clamping table, when the centre gripping frame draws the blank into the recess in, the second cylinder continues the motion of retracting, the blank is blockked by the lateral wall of recess, thereby slide on the circular-arc dog of edge, and fall into on the below cell wall of recess at last, and fall into the bearing groove at last, then stretch out and drive the compact heap through the piston rod of pneumatic cylinder and compress tightly the blank, the axis of blank and the feed port axis coincidence of forging and pressing device this moment, reduce forging and pressing in-process blank and take place the drunkenness, influence the condition of forging and pressing quality.

The utility model discloses further set up to: the utility model discloses a barbell bar, including centre gripping frame, braced frame, guide plate, bench, guide plate, baffle plate, distance between the limit plate and the length of barbell rod, the vertical direction sliding connection of edgewise vertical direction is followed to centre gripping frame and braced frame, fixedly connected with third cylinder on the braced frame, the piston rod of third cylinder vertically upwards extend and with centre gripping frame fixed connection, the base station is equipped with the rack on the lateral wall of direction of feeding, the top fixedly connected with stock guide of rack, the direction downward sloping of stock guide orientation base station, just one side fixed connection limit plate that the stock guide kept away from.

Through adopting above-mentioned technical scheme, through setting up the stock guide, the staff is direct arranges a plurality of steel pipes on two stock guides in proper order in a parallel with the length direction of base station, and when the piston rod of second cylinder stretches out, the piston rod withdrawal of third cylinder makes the centre gripping frame descend to the blank that is close to the base station on making the stock guide is located the centre gripping frame inboard, and then third cylinder piston rod stretches out, and promotes the blank, and then the piston rod withdrawal of second cylinder accomplishes the feeding action. Subsequent blank is because the influence of self gravity glides in proper order along the stock guide to the blank that makes the stock guide go up closest to the base station is contradicted with the striker plate, makes the staff can once only go up many blanks, thereby need not the staff and continuously waits for the material loading in the other standby of device, has simplified the step, has practiced thrift the manpower.

The utility model discloses further set up to: lie in on the base station 1 and pull feed mechanism both sides and be equipped with the fourth cylinder respectively, the piston rod of fourth cylinder is vertical upwards to be extended, the piston rod top fixedly connected with push pedal of unloading of fourth cylinder, the push pedal of unloading is located one side of recess length direction, be equipped with the inclined plane towards the downward sloping of feed direction on the top surface of the push pedal of unloading, work as the inclined plane is less than the tank bottom of bearing groove when the piston rod of fourth cylinder retracts, works as the inclined plane is higher than recess lower extreme lateral wall when the piston rod of fourth cylinder stretches out.

By adopting the technical scheme, after the blank is forged and pressed and the piston rod of the first cylinder is reset, the piston rod of the fourth cylinder extends out, the processed blank is pushed out of the bearing groove and slides down along the inclined plane of the unloading push plate under the support of the unloading push plate, so that the piston rod is separated from the groove, a space is reserved for next cycle of processing, automatic unloading is completed, the operation steps of workers are further reduced, and manpower is saved.

The utility model discloses further set up to: the side wall, facing the feeding direction, of the clamping table is provided with a material guide frame below the groove, and one side, away from the clamping table, of the material guide frame inclines downwards.

Through adopting above-mentioned technical scheme, through setting up the blank that the guide frame will break away from the recess and slide from the base station along the guide frame, reduced the condition that the good blank of processing is detained on the base station and is influenced subsequent processing, promoted the practicality of device.

The utility model discloses further set up to: one side of the base station facing the feeding direction is provided with a temporary storage frame on the ground, and the temporary storage frame is provided with a plurality of limiting stop rods.

By adopting the technical scheme, the temporary storage frame is arranged, so that the blanks separated from the base station can be collected conveniently, the blanks are limited between the temporary storage frame stop rods, and the inconvenient situation caused by the falling and rolling of the blanks is reduced.

The utility model discloses further set up to: the top surface of the temporary storage frame is provided with a soft pad, and the top end of the temporary storage frame is downwards inclined in the direction away from the base station.

Through adopting above-mentioned technical scheme, through setting up soft pad, reduced the noise that takes place when the blank drops, and reduced the striking and caused the blank to pound the condition of bad frame of keeping in, through setting up the frame of keeping in of slope, make the blank roll to the position of keeping away from the drop point after dropping, reduced the condition that follow-up blank dropped to strike each other on the blank that drops before and damage or send the harsh noise.

To sum up, the utility model discloses a beneficial technological effect does:

1. the traction feeding mechanism is arranged to drag and feed the blank, the clamping mechanism is used for fixing the blank, the blank is preheated through the heating ring, and the blank is forged and pressed through the forging and pressing device, so that the process is operated automatically, the workload of workers is reduced, and the working efficiency is improved;

2. the clamping frame is connected with the supporting frame in a sliding mode along the height direction, and the material guide plate is arranged, so that automatic feeding is realized, the workload of workers is further reduced, and the labor is saved;

3. through setting up the fourth cylinder and the push pedal of unloading, realized automatic discharge, accomplished the automation mechanized operation of whole flow, promoted the practicality and the convenience of device.

Drawings

Fig. 1 is a schematic diagram of the present embodiment for showing the overall structure of the apparatus.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.

Fig. 4 is a schematic diagram for showing the structure of the traction feeding mechanism in the embodiment.

Fig. 5 is a partially enlarged schematic view of a portion C in fig. 2.

In the figure, 1, a base station; 11. a guide rail; 12. a movable frame; 121. a heating ring; 13. a first cylinder; 2. a traction feeding mechanism; 21. a second cylinder; 22. a support frame; 221. a third cylinder; 23. a clamping frame; 231. a stopper; 2311. rounding the arc surface; 3. a clamping mechanism; 31. a clamping table; 311. a groove; 3111. a bearing groove; 32. a support table; 321. a hydraulic cylinder; 322. a compression block; 4. forging and pressing devices; 5. a rack; 51. a material guide plate; 511. a width limiting plate; 512. a striker plate; 6. a fourth cylinder; 61. a discharging push plate; 62. A bevel; 63. a material guide frame; 7. a temporary storage rack; 71. a limit stop lever; 72. a soft pad.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses an automatic barbell bar forging press, including base station 1, base station 1 all is equipped with first cylinder 13 along length direction both ends, and the piston rod of first cylinder 13 is on a parallel with the length direction of base station 1 and towards the portion of base station 1. The top end of the piston rod of the first air cylinder 13 is fixedly connected with a movable frame 12, the movable frame 12 is fixedly connected with a forging device 4, the forging device 4 is the prior art, and the axis of a feeding hole of the forging device 4 is parallel to the length direction of the base platform 1 and faces to the center of the base platform 1. A heating ring 121 with the axis parallel to the length direction of the base 1 is fixedly connected to one side of the forging device 4 facing the feeding direction on the movable frame 12;

referring to fig. 1 and 2, fixedly connected with pulls feed mechanism 2 on base station 1, pull feed mechanism 2 and include second cylinder 21 and support frame 22, the middle part of second cylinder 21 fixed connection on base station 1 and the piston rod of second cylinder 21 are towards the feeding direction, support frame 22 fixed connection is on the piston rod of second cylinder 21, one side that base station 1 was kept away from to support frame 22 has clamping frame 23 through slider and spout cooperation sliding connection along vertical direction, fixedly connected with third cylinder 221 on the support frame 22, the piston rod of third cylinder 221 extends and with support frame fixed connection along vertical direction, clamping frame 23 is "T" font frame and open end towards the feeding direction. A stop block 231 parallel to the length direction of the base station 1 is arranged on the bottom plate in the frame of the clamping frame 23, and arc-shaped rounded corners 2311 are formed on the inner side and the outer side of the stop block 231 facing the clamping frame 23;

referring to fig. 1, it all is equipped with clamping mechanism 3 to lie in traction feed mechanism 2 both sides on base station 1, clamping mechanism 3 is including pressing from both sides tight platform 31, press from both sides tight platform 31 and base station 1 fixed connection, it has seted up recess 311 on the lateral wall of tight platform 31 top surface towards the direction of feed, the bearing groove 3111 has been seted up on the bottom surface in the recess 311, the cross-section of bearing groove 3111 is the semicircle with blank profile looks adaptation, press from both sides tight platform 31 top fixedly connected with brace table 32, the vertical downwardly extending's of fixedly connected with piston rod pneumatic cylinder 321 on the brace table 32, the tailpiece of the piston rod fixedly connected with compact heap 322 of pneumatic cylinder 321, compact heap 322 is located the top of.

Referring to fig. 3 and 4, two racks 5 are fixedly connected to a side wall of the base platform 1 at one side in the feeding direction, the two racks 5 are respectively fixedly connected to two ends of the base platform 1 in the length direction, the top ends of the racks 5 are both fixedly connected with material guide plates 51, and one sides of the two material guide plates 51 close to the base platform 1 are respectively inclined downwards. The side walls of the guide plates 51 on the sides away from each other are fixedly connected with width limiting plates 511 perpendicular to the upper sides of the guide plates 51 and parallel to the length direction of the guide plates 51, the distance between the width limiting plates 511 is equal to the length of the barbell bar blank, and a material blocking plate 512 is fixedly arranged on one side of the guide plates 51 close to the base 1.

Referring to fig. 2, the four cylinders 6 with piston rods vertically and upwardly arranged are arranged on one side of each of the two pressing mechanisms facing the traction clamping mechanism, a discharging push plate 61 is fixedly connected to the top end of the piston rod of each of the four cylinders 6, the discharging push plate 61 is perpendicular to the upper surface of the base platform 1 and parallel to the width direction of the base platform 1, an inclined surface 62 is arranged on the top end of the discharging push plate 61, and the inclined surface 62 inclines downwardly towards one side of the feeding direction. The discharging push plate 61 is located at one side of the length direction of the groove 311, when the piston rod of the fourth cylinder 6 retracts, the highest point of the inclined surface 62 of the discharging push plate 61 is lower than the lowest point of the bottom of the bearing groove 3111, and when the piston rod of the fourth cylinder 6 extends, the lowest point of the inclined surface 62 is higher than the bottom surface of the groove 311.

Referring to fig. 4, one side fixedly connected with guide frame 63 towards the feeding direction is located below groove 311 of clamping table 31, the one end downward sloping that base station 1 was kept away from to guide frame 63, subaerial fixedly connected with temporary storage frame 7 towards feeding direction one side of base station 1, be equipped with a plurality of spacing pin 71 on temporary storage frame 7, a plurality of spacing pin 71 are located temporary storage frame 7 respectively and are close to and keep away from the both sides of base station 1, and the upper surface of temporary storage frame 7 is towards keeping away from the one side downward sloping of base station 1 direction, and the upper surface is equipped with soft pad 72.

The implementation principle of the embodiment is as follows: in the actual processing process, a plurality of blanks are sequentially arranged on the material guide plate 51 parallel to the width direction of the base platform 1 by a worker, and the blanks slide along the inclined surface 62 to the direction close to the base platform 1 and are blocked by the material blocking plate 512 due to the inclined arrangement of the material guide plate 51. Then the worker starts the device, the piston rod of the second cylinder 21 extends after the piston rod of the third cylinder 221 retracts, and the clamping frame 23 is aligned with the blank height on the material guide plate 51. When the blank close to the base station 1 is positioned in the clamping frame 23, the piston rod of the third cylinder 221 extends out, so that the clamping frame 23 moves upwards and lifts the blank to be at the same level with the height of the heating ring 121, and then the piston rod of the second cylinder 21 retracts. When the axis of the blank coincides with the axis of the heating ring 121, the second cylinder 21 stops operating, the piston rods of the first cylinders 13 at the two ends of the base station 1 extend out, so that the heating ring 121 is sleeved outside the blank and stays at the position to be processed of the blank, and the processing position of the blank is preheated by the heating ring 121.

After heating for a certain time, the piston rods of the two first cylinders 13 retract to separate the heating ring 121 from the blank, then the piston rod of the second cylinder 21 continues to retract until the blank is blocked by the side wall of the groove 311, slides out of the clamping frame 23 along the arc rounding 2311 of the stop block 231, falls into the groove 311, and enters the bearing groove 3111, the piston rod of the hydraulic cylinder 321 extends out to enable the pressing block 322 to abut against the blank so as to reduce the possibility that the blank moves in the forging and pressing process to influence the forging and pressing effect, at the moment, the axis of the blank coincides with the axis of the feeding hole of the forging and pressing device 4, the piston rods of the two first cylinders 13 extend out again to push the moving frame 12 to enable the feeding hole of the forging and pressing device 4 to move towards the blank, and the position to be processed on the blank enters the forging and.

After the forging press is finished, the piston rod of the first air cylinder 13 retracts to separate the forging press from the blank, then the piston rod of the fourth air cylinder 321 extends to enable the discharging push plate 61 to lift the blank out of the bearing groove 3111, the blank rises and is separated from the bottom wall of the groove 311, then slides downwards along the inclined surface 62 at the top end of the discharging push plate 61 and falls onto the guide frame 63, the blank continues to slide towards the direction far away from the base station 1 along the guide frame 63 and finally falls off from the base station 1 to the temporary storage frame 7, the soft pad 72 on the temporary storage frame 7 reduces the damage of the blank when the blank impacts the temporary storage frame 7, the guide frame 63 which is obliquely arranged enables the blank to slide towards the side far away from the falling point after the blank falls, and the damage or noise generation of the subsequent falling blank is reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the mechanism, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An automatic barbell bar forging press which is characterized in that: comprises a base platform (1), a traction feeding mechanism (2) is arranged in the center of the base platform (1), the traction feeding mechanism (2) is symmetrically provided with clamping mechanisms (3) along the two ends of the base platform (1) in the length direction, a guide rail (11) is arranged on the base platform (1) in the direction in which the two clamping mechanisms (3) are away from each other, a moving frame (12) is respectively arranged on the guide rail (11), a forging device (4) is arranged on the moving frame (12), the feeding holes of the two forging devices (4) respectively face the center of the base platform (1) in the length direction, a heating ring (121) is arranged on one side of the moving frame (12) facing the feeding direction of the forging device (4), the axes of the two heating rings (121) are respectively parallel to the length direction of the base platform (1), and first air cylinders (13) are respectively fixedly connected to the two ends of the base platform (1) in the length, piston rods of the first cylinders (13) are parallel to the length direction of the base platform (1) respectively and extend towards the direction close to each other, and the two moving frames (12) are fixedly connected with the piston rods of the two first cylinders (13) respectively.

2. The automatic barbell bar forging press of claim 1, wherein: pull feed mechanism (2) and include second cylinder (21) and support frame (22), support frame (22) fixed connection is in base station (1) length direction's central point puts, on the piston rod of support frame (22) fixed connection and second cylinder (21), be equipped with centre gripping frame (23) on support frame (22) one side lateral wall towards feed direction, centre gripping frame (23) are "T" font frame, the "T" font open end of centre gripping frame (23) is towards feed direction, centre gripping frame (23) are located one side towards feed direction on the bottom plate of "T" font downside and are equipped with dog (231), dog (231) are parallel with the riser of centre gripping frame (23) "T" font, dog (231) all are equipped with cambered surface radius (2311) towards the inside and outside both sides of centre gripping frame (23).

3. The automatic barbell bar forging press of claim 2, wherein: clamping mechanism (3) are including pressing from both sides tight platform (31), it is located base station (1) to press from both sides tight platform (31), one side towards the direction of feed is seted up fluted (311) to the top surface of pressing from both sides tight platform (31), seted up on the cell wall of recess (311) below and born groove (3111) that the cross-section is semicircular, fixedly connected with brace table (32) on pressing from both sides tight platform (31), fixedly connected with pneumatic cylinder (321) on brace table (32), the vertical downwardly extending of piston rod of pneumatic cylinder (321), fixedly connected with compact heap (322) on the piston rod of pneumatic cylinder (321), compact heap (322) shape and recess (311) looks adaptation.

4. The automatic barbell bar forging press of claim 3, wherein: centre gripping frame (23) and carriage are along vertical direction sliding connection, fixedly connected with third cylinder (221) on the carriage, the piston rod of third cylinder (221) is vertical upwards extend and with centre gripping frame (23) fixed connection, be equipped with on base station (1) the lateral wall towards the direction of feed on rack (5), top fixedly connected with stock guide (51) of rack (5), direction downward sloping towards base station (1) stock guide (51), just one side fixed connection limited width board (511) that stock guide (51) kept away from each other, distance between limited width board (511) is equal with the length of barbell rod, stock guide (51) are equipped with striker plate (512) respectively towards one side of base station (1).

5. The automatic barbell bar forging press of claim 4, wherein: lie in on base station (1) and pull feed mechanism (2) both sides and be equipped with fourth cylinder (6) respectively, the piston rod of fourth cylinder (6) is vertical upwards to be extended, the piston rod top fixedly connected with push pedal (61) of unloading of fourth cylinder (6), push pedal (61) of unloading are located recess (311) length direction's one side, be equipped with on the top surface of push pedal (61) of unloading towards the inclined plane (62) of feeding direction downward sloping, work as inclined plane (62) are less than the tank bottom of bearing groove (3111) when the piston rod of fourth cylinder (6) retracts, work as inclined plane (62) are higher than recess (311) lower extreme lateral wall when the piston rod of fourth cylinder (6) stretches out.

6. The automatic barbell bar forging press of claim 5, wherein: the side wall of the clamping table (31) facing the feeding direction is provided with a material guide frame (63) below the groove (311), and one side, away from the clamping table (31), of the material guide frame (63) inclines downwards.

7. The automatic barbell bar forging press of claim 6, wherein: one side of the base platform (1) facing the feeding direction is provided with a temporary storage rack (7) on the ground, and the temporary storage rack (7) is provided with a plurality of limiting stop rods.

8. The automatic barbell bar forging press of claim 7, wherein: the top surface of the temporary storage frame (7) is provided with a soft pad (72), and the top end of the temporary storage frame (7) is far away from the direction of the base station (1) and inclines downwards.