Variable-distance transfer device

Abstract

The utility model provides a variable pitch transfer device which comprises a base frame and a variable pitch mechanism, and the variable pitch mechanism comprises a first limiting baffle, a second limiting baffle, a cross telescopic frame, a first linear driver, a second linear driver, a discharging pushing assembly, at least three movable material receiving seats and material blocking assemblies in one-to-one correspondence with the movable material receiving seats. The telescopic direction of the crossed telescopic frame is arranged in the front-back direction, the crossed telescopic frame is provided with crossed connecting positions which correspond to the movable material receiving bases one to one and are sequentially distributed in the telescopic direction, and the movable material receiving bases are connected to the corresponding crossed connecting positions in a one-to-one correspondence mode. The movable material receiving base located on the foremost side is connected to the driving end of a first linear driver, and the movable material receiving base located on the rearmost side is connected to the driving end of a second linear driver. And when the movable material receiving seats move to the folding positions, the discharging pushing assembly drives the material blocking assemblies on all the movable material receiving seats to release the materials received by the corresponding movable material receiving seats.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of blood collection tube arrangement and packaging, especially to a variable distance transfer device. BACKGROUND

[0002] The blood collection tube is a disposable, negative pressure vacuum glass tube that can realize quantitative blood collection, and is a commonly used blood collection container in hospitals.

[0003] In the production process of the blood collection tube, the blood collection tube molded by injection on a mold needs to be folded and arranged and then put into a packaging bag. Currently, the blood collection tube is folded and arranged manually. However, this manual operation has the disadvantages of slow operation speed, long time consumption, and low efficiency, and needs to occupy a large amount of labor, which seriously affects the arrangement and packaging efficiency of the blood collection tube, and there is a risk of contamination of the blood collection tube caused by human contact, which cannot meet the efficient and clean arrangement and packaging requirements.

[0004] Therefore, there is an urgent need for a variable distance transfer device to overcome the above problems. UTILITY MODEL CONTENT

[0005] The utility model embodiment aims to provide a variable distance transfer device, which has the advantages of simple and compact structure, fast operation speed, reduced labor occupation, and guaranteed material cleanliness.

[0006] To achieve the above-mentioned purpose, the first aspect of the utility model embodiment provides a variable distance transfer device, which comprises a base frame and a variable distance mechanism, the variable distance mechanism comprises a first limiting baffle, a second limiting baffle, a cross telescopic frame, a first linear driver, a second linear driver, a material feeding and pushing assembly, at least three mobile material receiving seats, and a material blocking assembly corresponding to each of the mobile material receiving seats,

[0007] The first limiting baffle and the second limiting baffle are both fixed on the base frame along the left-right direction, and the first limiting baffle is located in front of the second limiting baffle in a spaced manner.

[0008] The mobile material receiving seats are sequentially arranged from front to back between the first limiting baffle and the second limiting baffle, and the mobile material receiving seats are all parallel to the first limiting baffle. The mobile material receiving seats have dispersed positions away from each other and folded positions close to each other.

[0009] The telescopic direction of the cross telescopic frame is arranged along the front-back direction. The cross telescopic frame has cross connection positions corresponding to the mobile material receiving seats and arranged in sequence along the telescopic direction. The mobile material receiving seats are connected to the corresponding cross connection positions.

[0010] The first linear driver and the second linear driver are fixed on the base frame along the front-rear direction, the mobile receiving seat at the frontmost side is connected to the driving end of the first linear driver, and the mobile receiving seat at the rearmost side is connected to the driving end of the second linear driver.

[0011] The material blocking assembly is arranged at the bottom of the mobile receiving seat in one-to-one correspondence, the material discharging and pushing assembly is arranged on the base frame, and when the mobile receiving seat moves to the folding position, the material discharging and pushing assembly drives all the material blocking assemblies on the mobile receiving seats to release the materials received by the corresponding mobile receiving seat.

[0012] Optionally, a plurality of vertical material receiving channels are formed in the mobile receiving seat.

[0013] Optionally, the material blocking assembly comprises a material blocking plate, which is arranged at the bottom of the mobile receiving seat and moves along the left-right direction, a material passing hole corresponding to the material receiving channel is formed in the material blocking plate, and the inner diameter of the material passing hole is equal to the inner diameter of the material receiving channel; the material blocking plate has a material discharging position and a material blocking position in the moving direction, when the material blocking plate moves to the material discharging position, the material passing hole corresponds to the lower end of the corresponding material receiving channel in one-to-one correspondence, and when the material blocking plate moves to the material blocking position, the material passing holes are all located away from the lower ends of the material receiving channels.

[0014] Optionally, the material blocking assembly further comprises an elastic pushing assembly, which is arranged on the mobile receiving seat and elastically drives the material blocking plate to move to the material blocking position.

[0015] Optionally, the elastic pushing assembly comprises a mounting shell, an elastic member and a sliding pushing block, the mounting shell is fixedly arranged in the mobile receiving seat along the left-right direction, the sliding pushing block is slidably arranged in the mounting shell along the left-right direction, the elastic member is arranged between the bottom of the mounting shell and the sliding pushing block, one end of the sliding pushing block away from the elastic member pushes the material blocking plate, and the elastic member constantly drives the sliding pushing block to push the material blocking plate to move to the material blocking position.

[0016] Optionally, the material blocking assembly further comprises a limiting rod, the upper end of the limiting rod is fixedly connected to the bottom of the mobile receiving seat in the vertical direction, an elongated limiting hole is formed in the material blocking plate in the vertical direction, the length direction of the elongated limiting hole is arranged along the left-right direction, and the limiting rod is slidably arranged in the elongated limiting hole.

[0017] Optionally, the material blocking assembly further comprises a limiting cap, the limiting cap is fixedly connected to the lower end of the limiting rod, and the material blocking plate is located between the bottom of the mobile receiving seat and the limiting cap.

[0018] Optionally, the material pushing assembly comprises a third linear driver fixed on the base frame in the left-right direction and a pushing plate fixedly connected to the driving end of the third linear driver; when the movable material receiving seats move to the folding position, the pushing plate simultaneously pushes all the material blocking plates on the movable material receiving seats to the material releasing position.

[0019] Optionally, the distance changing mechanism further comprises a first stop block, a second stop block, a third stop block and a fourth stop block, the first stop block and the second stop block are fixed on the base frame, the third stop block is fixed on the frontmost movable material receiving seat, and the fourth stop block is fixed on the last movable material receiving seat; when the movable material receiving seats move to the folding position, the third stop block abuts against the front side of the first stop block, and the fourth stop block abuts against the rear side of the second stop block.

[0020] Optionally, the cross telescopic frame comprises a plurality of connecting rods, each two connecting rods constitute a cross connecting assembly, the middle portions of the two connecting rods of each cross connecting assembly are hingedly connected to form the cross connecting portion, and the end portions of the connecting rods of adjacent two cross connecting assemblies are hingedly connected.

[0021] The first limiting baffle and the second limiting baffle of the variable-distance transfer device are fixed on the base frame along the left-right direction, and the first limiting baffle is located in front of the second limiting baffle in a spaced manner. The movable material receiving seats are sequentially arranged between the first limiting baffle and the second limiting baffle from front to back, and the movable material receiving seats are parallel to the first limiting baffle. The movable material receiving seats have dispersed positions away from each other and folding positions close to each other. The telescopic direction of the cross telescopic frame is arranged along the front-back direction. The cross telescopic frame has cross connection positions corresponding to the movable material receiving seats and sequentially arranged along the telescopic direction. The movable material receiving seats are connected to the corresponding cross connection positions. The first linear driver and the second linear driver are fixed on the base frame along the front-back direction. The movable material receiving seat located at the frontmost side is connected to the driving end of the first linear driver, and the movable material receiving seat located at the rearmost side is connected to the driving end of the second linear driver. The material blocking assemblies are arranged at the bottom of the movable material receiving seats, and the material discharging and pushing assembly is arranged on the base frame. When the movable material receiving seats move to the folding positions, the material discharging and pushing assembly drives the material blocking assemblies on all the movable material receiving seats to release the materials received by the corresponding movable material receiving seats. Then, the movable material receiving seat located at the frontmost side is pulled forward by the driving end of the first linear driver, and the movable material receiving seat located at the rearmost side is pulled backward by the driving end of the second linear driver. The remaining movable material receiving seats are pulled away from each other by the cross telescopic frame until all the movable material receiving seats move to the dispersed positions, and the materials are received by the movable material receiving seats. Then, the movable material receiving seat located at the frontmost side is pushed backward by the driving end of the first linear driver, and the movable material receiving seat located at the rearmost side is pushed forward by the driving end of the second linear driver until all the movable material receiving seats move to the folding positions. The material discharging and pushing assembly drives the material blocking assemblies on all the movable material receiving seats to release the materials received by the corresponding movable material receiving seats. Thus, the materials are received at the dispersed positions and then folded to the folding positions close to each other in a mechanical and automatic manner. The structure is simple and compact, and the manual folding and arranging mode of the materials is replaced. The operation speed is greatly improved, the time consumption is reduced, the efficiency is greatly improved, the occupation of labor is reduced, the folding and packaging efficiency of the materials is improved, the artificial contact is avoided, the risk of pollution of the materials is prevented, and the efficient and clean folding and packaging demand can be better met. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a combined perspective view of the variable-distance transfer device in the embodiment of the utility model.

[0023] Figure 2 It is a combined perspective view of the movable material receiving seat and the material blocking assembly of the variable-distance transfer device in the embodiment of the utility model.

[0024] Figure 3 It is an exploded view of Figure 2 . DETAILED DESCRIPTION

[0025] The utility model will be further described below in combination with the drawings and preferred embodiments, but the implementation of the utility model is not limited thereto.

[0026] Please refer to Figures 1 to 3The variable-distance intermediate transfer device 100 comprises a base frame 10 and a variable-distance mechanism 20. The variable-distance mechanism 20 comprises a first limiting baffle 21a, a second limiting baffle 21b, a cross telescopic frame 22, a first linear driver 21c, a second linear driver 21d, a material discharging and pushing assembly 23, at least three mobile material receiving seats 24, and a material blocking assembly 25 corresponding to each mobile material receiving seat 24. The first limiting baffle 21a and the second limiting baffle 21b are both fixed on the base frame 10 along the left-right direction, and the first limiting baffle 21a is located in front of the second limiting baffle 21b in a spaced manner. The mobile material receiving seats 24 are sequentially arranged from front to back between the first limiting baffle 21a and the second limiting baffle 21b, and the mobile material receiving seats 24 are all parallel to the first limiting baffle 21a. The mobile material receiving seats 24 have a dispersed position away from each other and a folded position close to each other. The first limiting baffle 21a and the second limiting baffle 21b limit the movement of all the mobile material receiving seats 24 between the first limiting baffle 21a and the second limiting baffle 21b. The telescopic direction of the cross telescopic frame 22 is arranged along the front-back direction. The cross telescopic frame 22 has cross connection positions 221 corresponding to the mobile material receiving seats 24 and sequentially distributed along the telescopic direction. The mobile material receiving seats 24 are connected to the corresponding cross connection positions 221. The first linear driver 21c and the second linear driver 21d can be selected as air cylinders, but are not limited thereto. The first linear driver 21c and the second linear driver 21d are both arranged on the base frame 10 along the front-back direction. The mobile material receiving seat 24 located at the frontmost side is connected to the driving end of the first linear driver 21c, and the mobile material receiving seat 24 located at the rearmost side is connected to the driving end of the second linear driver 21d. When the first linear driver 21c and the second linear driver 21d drive the mobile material receiving seat 24 at the frontmost side and the mobile material receiving seat 24 at the rearmost side respectively, the cross telescopic frame 22 can be stretched or compressed to drive the remaining mobile material receiving seats 24 away from each other or close to each other to move to the dispersed position or the folded position. The material blocking assembly 25 is arranged at the bottom of the mobile material receiving seat 24 to block the material received by the mobile material receiving seat 24 from falling. The material discharging and pushing assembly 23 is arranged on the base frame 10. When the mobile material receiving seat 24 moves to the folded position, the material discharging and pushing assembly 23 drives the material blocking assembly 25 on all the mobile material receiving seats 24 to release the material received by the corresponding mobile material receiving seat 24.Then, the foremost mobile receiving seat 24 is pulled forward by the driving end of the first linear driver 21c, the rearmost mobile receiving seat 24 is pulled backward by the driving end of the second linear driver 21d, and the remaining mobile receiving seats 24 are pulled away from each other by the cross telescopic frame 22 until all the mobile receiving seats 24 move to the dispersed position, i.e., the mobile receiving seats 24 can receive the materials; then, the foremost mobile receiving seat 24 is pushed backward by the driving end of the first linear driver 21c, the rearmost mobile receiving seat 24 is pushed forward by the driving end of the second linear driver 21d until all the mobile receiving seats 24 move to the gathered position, and then the material releasing pushing assembly 23 drives the blocking material assembly 25 on all the mobile receiving seats 24 to release the materials received by the corresponding mobile receiving seats 24. Thus, the materials received at the dispersed position can be gathered to the gathered position, the structure is simple and compact, the manual gathering of the materials is replaced, the operation speed is greatly improved, the operation time is reduced, the efficiency is greatly improved, the occupation of labor is reduced, the efficiency of the gathering and packaging of the materials is improved, the human contact is avoided, the risk of pollution of the materials is prevented, and the high-efficiency and clean gathering and packaging requirement can be better met.

[0027] In this embodiment, a plurality of vertical receiving channels 241 are formed on the mobile receiving seat 24, and the receiving channels 241 are used to accommodate the received materials.

[0028] In this embodiment, the blocking material assembly 25 includes a blocking plate 251, which is arranged on the bottom of the mobile receiving seat 24 and moves in the left-right direction. The blocking plate 251 is provided with a plurality of material passing holes 2511 corresponding to the receiving channels 241, and the inner diameter of the material passing hole 2511 is equal to the inner diameter of the receiving channel 241. The blocking plate 251 has a material releasing position and a material blocking position in the moving direction. When the blocking plate 251 moves to the material releasing position, the material passing hole 2511 corresponds to the lower end of the corresponding receiving channel 241, and the materials in the receiving channel 241 can fall out of the material passing hole 2511. When the blocking plate 251 moves to the material blocking position, the material passing hole 2511 is located away from the lower end of the receiving channel 241, and the blocking plate 251 blocks the lower end of the receiving channel 241 to block the materials in the receiving channel 241.

[0029] Further, in the embodiment, the material blocking assembly 25 further comprises an elastic pushing assembly 252, which is arranged on the moving material receiving seat 24 and elastically drives the material blocking plate 251 to move to the material blocking position. In detail, in the embodiment, the elastic pushing assembly 252 comprises a mounting shell 2521, an elastic member (not shown in the figure) and a sliding pushing block 2522. The mounting shell 2521 is fixedly arranged in the groove of the moving material receiving seat 24 along the left-right direction. The sliding pushing block 2522 is slidably arranged in the mounting shell 2521 along the left-right direction. The elastic member can be a spring. The elastic member is in compression and abuts between the bottom of the mounting shell 2521 and the sliding pushing block 2522. The end of the sliding pushing block 2522 away from the elastic member pushes the material blocking plate 251. The elastic member constantly drives the sliding pushing block 2522 to push the material blocking plate 251 to move to the material blocking position. In this way, the material blocking plate 251 can be automatically reset to move to the material blocking position, and the structure is more simple and reasonable.

[0030] Further, the material blocking assembly 25 further comprises a limiting rod 253, the upper end of which is vertically and fixedly connected to the bottom of the moving material receiving seat 24. The material blocking plate 251 is formed with an elongated limiting hole 2512 which is vertically and penetrates through. The length direction of the elongated limiting hole 2512 is arranged along the left-right direction, and the limiting rod 253 is slidably arranged in the elongated limiting hole 2512. In this way, the movement stroke of the material blocking plate 251 is limited by the limiting cooperation between the limiting rod 253 and the elongated limiting hole 2512, and the structure is more safe and reasonable. Preferably, in the embodiment, the material blocking assembly 25 further comprises a limiting cap 254, which is fixedly connected to the lower end of the limiting rod 253. The material blocking plate 251 is located between the bottom of the moving material receiving seat 24 and the limiting cap 254. In this way, the material blocking plate 251 is limited between the bottom of the moving material receiving seat 24 and the limiting cap 254 by the limiting cap 254, so as to prevent the material blocking plate 251 from being separated downward, and the structure is more safe and reasonable.

[0031] Further, in the embodiment, the material releasing pushing assembly 23 comprises a third linear driver 231 and a pushing plate 232. The third linear driver 231 can be a gas cylinder, but is not limited thereto. The third linear driver 231 is fixedly arranged on the base frame 10 along the left-right direction. The pushing plate 232 is fixedly connected to the driving end of the third linear driver 231. When the moving material receiving seat 24 moves to the folding position, the pushing plate 232 simultaneously pushes all the material blocking plates 251 on the moving material receiving seat 24 to move to the material releasing position. In this way, all the material blocking plates 251 on the moving material receiving seat 24 are simultaneously pushed to release the materials received by the material receiving channel 241 on the corresponding moving material receiving seat 24 at the folding position, and the structure is more simple and reasonable.

[0032] The variable distance mechanism 20 further comprises: a first stop block 26a, a second stop block 26b, a third stop block 26c and a fourth stop block 26d, the first stop block 26a and the second stop block 26b are both fixed on the base frame 10, the third stop block 26c is fixed on the most front side of the movable material receiving seat 24, and the fourth stop block 26d is fixed on the most rear side of the movable material receiving seat 24; when the movable material receiving seat 24 moves to the folding position, the third stop block 26c abuts against the front side of the first stop block 26a, and the fourth stop block 26d abuts against the rear side of the second stop block 26b. Therefore, through the limiting and blocking effect of the first stop block 26a and the second stop block 26b, the first linear driver 21c is prevented from driving the most front side of the movable material receiving seat 24 to move excessively, and the second linear driver 21d is prevented from driving the most rear side of the movable material receiving seat 24 to move excessively, thereby avoiding the collision and damage caused by the mutual close movement of all the movable material receiving seats 24 to the folding position, and the structure is more safe and reasonable.

[0033] Alternatively, the cross telescopic frame 22 comprises: a plurality of connecting rods 222, every two connecting rods 222 form a cross connecting assembly 22a, the middle portions of the two connecting rods 222 of each cross connecting assembly 22a are hingedly connected to each other to form a cross connecting portion 221, and the end portions of the connecting rods 222 of adjacent two cross connecting assemblies 22a are hingedly connected to each other. Therefore, the cross telescopic frame 22 can be stretched or compressed, and the structure is more simple and reasonable.

[0034] Alternatively, in the embodiment, eight movable material receiving seats 24 are arranged between the first limiting baffle 21a and the second limiting baffle 21b, but the number is not limited thereto, and a person skilled in the art can flexibly select according to actual use requirements, which are all within the protection scope of the utility model, and thus will not be described in detail here.

[0035] Alternatively, in order to meet the use requirements, in the embodiment, as shown in Figure 1 two groups of variable distance mechanisms 20 are arranged on the base frame 10 at the same time, and the two groups of variable distance mechanisms 20 are arranged in opposite directions from front to back, so as to meet the requirements of folding more materials at the same time, and meet the requirements of scattered material receiving and variable distance folding at different positions. However, the number of the variable distance mechanisms 20 is not limited thereto, and a person skilled in the art can flexibly select according to actual use requirements, which are all within the protection scope of the utility model, and thus will not be described in detail here.

[0036] The working principle of the variable distance transfer device 100 of the utility model will be described in detail in combination with the drawings.

[0037] Firstly, the frontmost mobile receiving seat 24 is moved forward by the driving end of the first linear driver 21c, the lastmost mobile receiving seat 24 is moved backward by the driving end of the second linear driver 21d, and the remaining mobile receiving seats 24 are moved away from each other by the cross telescopic frame 22 until all the mobile receiving seats 24 are moved to the dispersed position, and then the material can be received by the mobile receiving seats 24.

[0038] Then, the frontmost mobile receiving seat 24 is pushed backward by the driving end of the first linear driver 21c, the lastmost mobile receiving seat 24 is pushed forward by the driving end of the second linear driver 21d until all the mobile receiving seats 24 are moved to the folded position.

[0039] Next, the push plate 232 is driven by the third linear driver 231 to push the material blocking plate 251 on all the mobile receiving seats 24 to move to the folded position to release the material received by the material receiving channel 241 on the corresponding mobile receiving seat 24, thereby completing the folding of the material.

[0040] For example, the material received and folded by the variable-distance transfer device 100 of the present application can be selected as a blood collection tube, thereby realizing the automatic folding and arrangement of the blood collection tube. Of course, the specific type of the material received and folded by the variable-distance transfer device 100 of the present application is not limited to this, and the person skilled in the art can flexibly select according to the actual use requirement, which is all within the protection scope of the present application, and therefore, will not be described in detail here.

[0041] The first limiting baffle 21a and the second limiting baffle 21b of the variable-distance intermediate transfer device 100 are fixed on the base frame 10 along the left-right direction, and the first limiting baffle 21a is located in front of the second limiting baffle 21b in a spaced manner. The movable material receiving seats 24 are sequentially arranged between the first limiting baffle 21a and the second limiting baffle 21b from front to back, and the movable material receiving seats 24 are parallel to the first limiting baffle 21a. The movable material receiving seats 24 have dispersed positions away from each other and folding positions close to each other. The telescopic direction of the cross telescopic frame 22 is arranged along the front-back direction. The cross telescopic frame 22 has cross connection positions 221 corresponding to the movable material receiving seats 24 and sequentially arranged along the telescopic direction. The movable material receiving seats 24 are connected to the corresponding cross connection positions 221. The first linear driver 21c and the second linear driver 21d are arranged on the base frame 10 along the front-back direction. The movable material receiving seat 24 located at the frontmost side is connected to the driving end of the first linear driver 21c, and the movable material receiving seat 24 located at the rearmost side is connected to the driving end of the second linear driver 21d. The material blocking assemblies 25 are arranged on the bottom of the movable material receiving seats 24 in a one-to-one correspondence. The material discharging and pushing assembly 23 is arranged on the base frame 10. When the movable material receiving seats 24 move to the folding positions, the material discharging and pushing assembly 23 drives the material blocking assemblies 25 on all the movable material receiving seats 24 to release the materials received by the corresponding movable material receiving seats 24. Then, the movable material receiving seat 24 located at the frontmost side is pulled forward by the driving end of the first linear driver 21c, the movable material receiving seat 24 located at the rearmost side is pulled backward by the driving end of the second linear driver 21d, and the remaining movable material receiving seats 24 are pulled away from each other by the cross telescopic frame 22 until all the movable material receiving seats 24 move to the dispersed positions, and the materials are received by the movable material receiving seats 24. Then, the movable material receiving seat 24 located at the frontmost side is pushed backward by the driving end of the first linear driver 21c, the movable material receiving seat 24 located at the rearmost side is pushed forward by the driving end of the second linear driver 21d, until all the movable material receiving seats 24 move to the folding positions, and the material discharging and pushing assembly 23 drives the material blocking assemblies 25 on all the movable material receiving seats 24 to release the materials received by the corresponding movable material receiving seats 24. Thus, the materials are received at the dispersed positions and then folded to the folding positions close to each other in a mechanical and automatic manner. The structure is simple and compact, and the manual folding and arranging of the materials are replaced, the operation speed is greatly improved, the time consumption is reduced, the efficiency is greatly improved, the occupation of labor is reduced, the folding and packaging efficiency of the materials is improved, the human contact is avoided, the risk of pollution of the materials is prevented, and the efficient and clean folding and packaging requirement is better met.

[0042] The utility model is not limited to the above-mentioned embodiments, but should cover various modifications, equivalent combinations according to the essence of the utility model.

Claims

1. A variable pitch staging device, characterized by, The application relates to a material feeding device, which comprises a base frame and a variable-distance mechanism, wherein the variable-distance mechanism comprises a first limiting baffle, a second limiting baffle, a cross telescopic frame, a first linear driver, a second linear driver, a material feeding and pushing assembly, at least three movable material receiving seats and a material blocking assembly corresponding to the movable material receiving seats. The first limiting baffle and the second limiting baffle are fixed on the base frame along the left-right direction, and the first limiting baffle is spaced apart from the front side of the second limiting baffle. The movable material receiving seats are sequentially arranged from front to back between the first limiting baffle and the second limiting baffle, and the movable material receiving seats are parallel to the first limiting baffle; the movable material receiving seats have dispersed positions away from each other and folded positions close to each other. The telescopic direction of the cross telescopic frame is arranged along the front-back direction; the cross telescopic frame has cross connection positions corresponding to the movable material receiving seats and sequentially arranged along the telescopic direction; the movable material receiving seats are connected to the corresponding cross connection positions. The first linear driver and the second linear driver are fixed on the base frame along the front-back direction; the movable material receiving seat at the frontmost side is connected to the driving end of the first linear driver; and the movable material receiving seat at the rearmost side is connected to the driving end of the second linear driver. The material blocking assembly is arranged at the bottom of the movable material receiving seat; the material feeding and pushing assembly is arranged on the base frame; when the movable material receiving seat moves to the folded position, the material feeding and pushing assembly drives the material blocking assembly on all the movable material receiving seats to release the material received by the corresponding movable material receiving seat. The movable material receiving seat is formed with a plurality of vertical material receiving channels.

2. The variable-pitch staging device of claim 1, wherein, The material blocking assembly comprises a material blocking plate arranged at the bottom of the movable material receiving seat along the left-right direction; the material blocking plate is formed with material passing holes corresponding to the material receiving channels; the inner diameter of the material passing hole is equal to the inner diameter of the material receiving channel; the material blocking plate has a material releasing position and a material blocking position along the moving direction; when the material blocking plate moves to the material releasing position, the material passing hole corresponds to the lower end of the corresponding material receiving channel; and when the material blocking plate moves to the material blocking position, the material passing hole is deviated from the lower end of the material receiving channel.

3. The variable-pitch staging device of claim 2, wherein, The material blocking assembly further comprises an elastic pushing assembly arranged on the movable material receiving seat; the elastic pushing assembly elastically drives the material blocking plate to move to the material blocking position.

4. The variable-pitch staging device of claim 3, wherein, The elastic pushing assembly comprises a mounting shell, an elastic member and a sliding pushing block; the mounting shell is fixedly arranged in the movable material receiving seat along the left-right direction; the sliding pushing block is slidably arranged in the mounting shell along the left-right direction; the elastic member is arranged between the bottom of the mounting shell and the sliding pushing block; the end of the sliding pushing block away from the elastic member pushes the material blocking plate; and the elastic member constantly drives the sliding pushing block to push the material blocking plate to move to the material blocking position.

5. The variable-pitch staging device of claim 4, wherein, ​ 6. The variable-pitch staging device of claim 3, wherein, The material blocking assembly further comprises a limiting rod, an upper end of the limiting rod is fixedly connected to a bottom of the moving material receiving seat in a vertical manner, an elongated limiting hole is formed in the material blocking plate in a vertical manner, a length direction of the elongated limiting hole is arranged in a left-right direction, and the limiting rod is slidably arranged in the elongated limiting hole.

7. The variable-pitch staging device of claim 6, wherein, The material blocking assembly further comprises a limiting cap, the limiting cap is fixedly connected to a lower end of the limiting rod, and the material blocking plate is located between the moving material receiving seat and the limiting cap.

8. The variable-pitch staging device of claim 3, wherein, The material discharging pushing assembly comprises a third linear driver and a pushing plate, the third linear driver is fixed to the base frame in the left-right direction, and the pushing plate is fixedly connected to a driving end of the third linear driver; when the moving material receiving seat moves to the folding position, the pushing plate simultaneously pushes all the material blocking plates on the moving material receiving seat to move to the material discharging position.

9. The variable-pitch staging device of any one of claims 1 to 8, wherein, The distance changing mechanism further comprises a first stop block, a second stop block, a third stop block and a fourth stop block, the first stop block and the second stop block are fixed to the base frame, the third stop block is fixed to the moving material receiving seat at the most front side, and the fourth stop block is fixed to the moving material receiving seat at the most rear side; when the moving material receiving seat moves to the folding position, the third stop block abuts against a front side of the first stop block, and the fourth stop block abuts against a rear side of the second stop block.

10. The variable-pitch staging device of any one of claims 1 to 8, wherein, The cross telescopic frame comprises a plurality of connecting rods, each two connecting rods form a cross connecting assembly, a middle part of each two connecting rods of each cross connecting assembly is hingedly connected to form a cross connecting position, and end parts of the connecting rods of adjacent two cross connecting assemblies are hingedly connected to each other.

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