CN220375548U

CN220375548U - Adjustable conveying device

Info

Publication number: CN220375548U
Application number: CN202321070374.1U
Authority: CN
Inventors: 邵文选; 刘双; 鲍钉; 张新荣
Original assignee: Zhangye Yuanda Highway Materials Co ltd
Current assignee: Zhangye Yuanda Highway Materials Co ltd
Priority date: 2023-05-07
Filing date: 2023-05-07
Publication date: 2024-01-23
Anticipated expiration: 2033-05-07

Abstract

The utility model discloses an adjustable conveying device, which comprises: the bottom plate, the position department of bottom plate upper end middle part both sides is fixed with the stand, and the top of two stands is all transversely fixed with the sleeve, and the top of bottom plate and the position department that is located the stand both sides are provided with first transmission shaft and second transmission shaft respectively, and the second transmission shaft is connected with the sleeve through flexible subassembly, and the both ends of first transmission shaft rotate and are connected with the drive post, the lower extreme and the bottom plate fixed connection of drive post. According to the adjustable conveying device, through the matched use design of the multiple structures, the telescopic assembly can drive the second transmission shaft to move, and the distance between the second transmission shaft and the first transmission shaft is adjusted, so that the conveying distance is adjusted, and the problems of material blocking, material leakage and material damage caused by the fact that a plurality of conveyors are needed to be used for splicing during long-distance conveying are avoided.

Description

Adjustable conveying device

Technical Field

The utility model relates to the technical field of conveying devices, in particular to an adjustable conveying device.

Background

The building stones are often used for building and bridge, in the building stones exploitation production line, conveyor is common equipment, accepts each production flow through conveying equipment, satisfies the convenient demand of building stones production, tends to traditional manpower transportation, very big saving time and labour.

As disclosed in chinese patent (CN 217200253U), a stone conveyor for quarries is disclosed, in which: "install at the fixed column both ends through two cylinders symmetry, when cylinder control telescopic link extended and contracted, make the roller that moves slide to the mounting bracket outside to make conveyor can lengthen and shorten", still recorded: the length of the conventional conveyor belt cannot be changed, a plurality of conveyors are required to be matched for use, and the technical problems of blockage, leakage, material damage and the like caused by splicing of a plurality of conveyors for long-distance conveying are avoided.

In summary, the following technical problems exist in the prior art: the length of the existing conveyor belt cannot be changed, a plurality of conveyors are needed to be matched for use, the defects of material blocking, material leakage, material damage and the like caused by splicing of a plurality of conveyors used for long-distance conveying are avoided, and therefore, the application provides an adjustable conveying device which solves the technical problems in the above-mentioned patent and provides a new technical scheme.

Disclosure of Invention

Based on the above, it is necessary to provide an adjustable conveying device, through the cooperation design of multiple structures, the telescopic assembly can drive the second transmission shaft to move, and the distance between the second transmission shaft and the first transmission shaft is adjusted, so that the conveying distance is adjusted; when the distance between the second transmission shaft and the first transmission shaft is adjusted, the tension assembly can be used for keeping the conveyor belt tight, so that the lower part of the conveyor belt is prevented from contacting with the bottom plate to cause abrasion of the conveyor belt when the distance between the second transmission shaft and the first transmission shaft is shortened; and the problems of material blocking, material leakage and material damage caused by splicing of a plurality of conveyors are avoided during long-distance conveying.

According to the adjustable conveying device provided by the utility model, through the structural design of the limiting component, the rotation adjustment of the transmission component can be limited, and the phenomenon that the second transmission shaft moves to influence the normal use of the device due to the unexpected rotation of the transmission component can be avoided.

In order to solve the technical problems, the utility model adopts the following technical scheme:

an adjustable conveying device is applied to conveying stones.

The adjustable conveying device specifically comprises:

the device comprises a bottom plate, wherein upright posts are fixed at the positions of two sides of the middle part of the upper end of the bottom plate, sleeves are transversely fixed at the top ends of the two upright posts, a first transmission shaft and a second transmission shaft are respectively arranged above the bottom plate and at the positions of two sides of the upright posts, the second transmission shaft is connected with the sleeves through a telescopic assembly, two ends of the first transmission shaft are rotatably connected with transmission columns, and the lower ends of the transmission columns are fixedly connected with the bottom plate; the first transmission shaft and the second transmission shaft are in transmission connection through a conveying belt;

a first wheel shaft arranged at a position between the two upright posts, wherein the lower end of the conveying belt bypasses above the first wheel shaft;

and the tensioning assembly is arranged at the upper end of the bottom plate and is positioned at the positions on two sides of the upright post and used for tensioning and adjusting the conveying belt.

As a preferred implementation mode of the adjustable conveying device provided by the utility model, the telescopic assembly comprises a telescopic column, two ends of the second transmission shaft are respectively and rotatably connected with the telescopic column, one end, close to the sleeve, of the telescopic column is fixedly provided with a connecting rod, one end, far away from the telescopic column, of the connecting rod is fixedly provided with a rack, the rack and the connecting rod are respectively positioned in the sleeve on the same side, the rack is in sliding connection with the sleeve, one end, close to the sleeve, of the telescopic column extends to the inside of the sleeve, one end, positioned in the sleeve, of the telescopic column is fixedly provided with a limiting block, and the limiting block is in sliding connection with the sleeve; and a transmission assembly is further arranged between the two sleeves, two ends of the transmission assembly extend into the two sleeves, and two ends of the transmission assembly are respectively connected with the two racks.

As a preferred implementation mode of the adjustable conveying device provided by the utility model, the transmission assembly comprises a transmission rod, two ends of the transmission rod extend into the two sleeves respectively, gears are fixed at two ends of the transmission rod, and the gears are in meshed connection with racks; one end of the transmission rod penetrates through the sleeve and extends to the outer side of the sleeve, and one end of the transmission rod located at the outer side of the sleeve is fixed with a rotating handle.

As a preferred embodiment of the adjustable conveying device provided by the utility model, the tensioning assembly comprises a second roller, the second roller is positioned at the side of the first wheel shaft, the second roller is lower than the first wheel shaft, the two ends of the second roller are respectively provided with an adjusting column, the lower ends of the adjusting columns are fixedly connected with the bottom plate, the inner sides of the adjusting columns are provided with adjusting assemblies, the end parts of the second roller are movably connected with the adjusting columns through the adjusting assemblies, and the lower ends of the conveying belt bypass from the lower parts of the second roller.

As a preferred implementation mode of the adjustable conveying device provided by the utility model, the adjusting assembly comprises a telescopic rod, the upper end of the telescopic rod is fixed with the adjusting column, the lower end of the telescopic rod is fixed with a sliding block, the sliding block is in sliding connection with the adjusting column, a first spring is sleeved outside the telescopic rod, the lower end of the first spring is attached to the sliding block, and the end part of the second rolling shaft is in rotary connection with the sliding block.

As a preferred implementation mode of the adjustable conveying device provided by the utility model, support rods are arranged below the telescopic columns, one ends of the support rods are rotatably connected with the lower ends of the telescopic columns through one fixing seat, and the other ends of the support rods are rotatably connected with the bottom plate through the other fixing seat.

As a preferred implementation mode of the adjustable conveying device provided by the utility model, the upper end of the bottom plate is also provided with a motor, the output end of the motor and the end part of the first transmission shaft are both fixed with a transmission disc, and the transmission disc on the first transmission shaft is connected with the transmission disc on the output end of the motor through a transmission belt.

As a preferred embodiment of the adjustable conveying device provided by the utility model, a limiting component is arranged at the upper end of the sleeve and positioned at the end part of the transmission component, the limiting component comprises a clamping block, the clamping block is positioned in the sleeve and is in sliding connection with the sleeve, the lower end of the clamping block is in matched connection with the gear, a handle is fixed at the upper end of the clamping block, the upper end of the handle extends to the outer side of the sleeve, and the handle is in sliding connection with the sleeve.

As a preferred implementation mode of the adjustable conveying device provided by the utility model, buckles are slidably connected in the sleeve at positions which are positioned on two sides of the clamping block, one end of each buckle is connected with the clamping block in a buckled mode, the upper end and the lower end of one end of each buckle, which is buckled with the clamping block, are respectively provided with an inclined plane, a second spring is fixed at the other end of each buckle, and one end, which is far away from each buckle, of each second spring is fixedly connected with the sleeve.

Compared with the prior art, the utility model has the following beneficial effects:

according to the adjustable conveying device provided by the utility model, through the matched use design of a plurality of structures, the telescopic assembly can drive the second transmission shaft to move, and the distance between the second transmission shaft and the first transmission shaft is adjusted, so that the conveying distance is adjusted; when the distance between the second transmission shaft and the first transmission shaft is adjusted, the tension assembly can be used for keeping the conveyor belt tight, so that the lower part of the conveyor belt is prevented from contacting with the bottom plate to cause abrasion of the conveyor belt when the distance between the second transmission shaft and the first transmission shaft is shortened; and the problems of material blocking, material leakage and material damage caused by splicing of a plurality of conveyors are avoided during long-distance conveying.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of an adjustable conveyor provided by the present utility model;

FIG. 2 is a schematic view of the telescopic assembly of the adjustable conveyor provided by the present utility model;

FIG. 3 is an enlarged view of the adjustable conveyor telescoping assembly provided by the present utility model;

FIG. 4 is a schematic diagram of a connection structure of a transmission rod and a rack of an adjustable conveying device provided by the utility model;

FIG. 5 is a schematic illustration of the construction of an adjustable conveyor tensioning assembly provided by the present utility model;

fig. 6 is a schematic diagram of a connection structure of a second roller and an adjusting column of the adjustable conveying device provided by the utility model;

fig. 7 is a schematic diagram of a connection structure of an adjustable conveyor motor and a first transmission shaft provided by the utility model;

fig. 8 is an enlarged view of the structure of the adjustable conveyor stop assembly provided by the present utility model.

The labels in the figures are illustrated below: 1. a bottom plate; 2. a column; 3. an adjusting column; 4. a drive column; 5. a sleeve; 6. a conveyor belt; 7. a first drive shaft; 8. a second drive shaft; 9. a first axle; 10. a second roller; 11. a telescopic column; 12. an adjustment assembly; 13. a transmission assembly; 14. a support rod; 15. a rack; 16. a gear; 17. a rotating handle; 18. a transmission rod; 19. a limiting block; 20. a connecting rod; 21. a motor; 22. a slide block; 23. a telescopic rod; 24. a first spring; 25. a clamping block; 26. a buckle; 27. a second spring; 28. a handle; 29. a transmission belt; 30. a limit component; 31. a fixing seat.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As for the background art, the length of the existing conveyor belt cannot be changed, a plurality of conveyors are needed to be matched for use, and the problems of blockage, leakage, material damage and the like caused by splicing of a plurality of conveyors for long-distance conveying are avoided.

In order to solve the technical problem, the utility model provides an adjustable conveying device which is applied to conveying stones.

Specifically, referring to fig. 1-8, the adjustable delivery device specifically includes:

the bottom plate 1, the position department of the middle part both sides of bottom plate 1 upper end are fixed with stand 2, the top of two stand 2 is all transversely fixed with sleeve 5, the position department that just is located stand 2 both sides above the bottom plate 1 is provided with first transmission shaft 7 and second transmission shaft 8 respectively, second transmission shaft 8 is connected with sleeve 5 through the flexible subassembly, the both ends of first transmission shaft 7 rotate and are connected with drive post 4, the lower extreme and the bottom plate 1 fixed connection of drive post 4; the first transmission shaft 7 and the second transmission shaft 8 are in transmission connection through a conveying belt 6;

a first wheel shaft 9 provided at a position between the two columns 2, the lower end of the conveyor belt 6 being wound over the first wheel shaft 9;

and the tensioning assembly is arranged at the upper end of the bottom plate 1 and positioned at the positions on two sides of the upright post 2 and is used for tensioning and adjusting the conveying belt 6.

According to the adjustable conveying device provided by the utility model, through the matched use design of a plurality of structures, the telescopic assembly can drive the second transmission shaft 8 to move, and the distance between the second transmission shaft 8 and the first transmission shaft 7 is adjusted, so that the conveying distance is adjusted; when the distance between the second transmission shaft 8 and the first transmission shaft 7 is adjusted, the conveyer belt 6 can be kept tight through the tensioning assembly, so that the abrasion of the conveyer belt 6 caused by the contact between the lower part of the conveyer belt 6 and the bottom plate 1 when the distance between the second transmission shaft 8 and the first transmission shaft 7 is shortened is avoided; and the problems of material blocking, material leakage and material damage caused by splicing of a plurality of conveyors are avoided during long-distance conveying.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Example 1:

referring to fig. 1-7, an adjustable delivery device, comprising:

the bottom plate 1, the position department of the middle part both sides of bottom plate 1 upper end are fixed with stand 2, the top of two stand 2 is all transversely fixed with sleeve 5, the position department that just is located stand 2 both sides above the bottom plate 1 is provided with first transmission shaft 7 and second transmission shaft 8 respectively, second transmission shaft 8 is connected with sleeve 5 through the flexible subassembly, the both ends of first transmission shaft 7 rotate and are connected with drive post 4, the lower extreme and the bottom plate 1 fixed connection of drive post 4; the first transmission shaft 7 and the second transmission shaft 8 are in transmission connection through a conveying belt 6; the upper end of the bottom plate 1 is also provided with a motor 21, the output end of the motor 21 and the end part of the first transmission shaft 7 are both fixed with transmission discs, and the transmission discs on the first transmission shaft 7 are connected with the transmission discs on the output end of the motor 21 through a transmission belt 29 and are used for providing power for the conveying device;

the tensioning assemblies are arranged at the upper end of the bottom plate 1 and positioned at the positions on two sides of the upright post 2 and are used for tensioning and adjusting the conveying belt 6;

specifically, the telescopic assembly includes flexible post 11, and the both ends of second transmission shaft 8 all rotate and are connected with flexible post 11, and the below of flexible post 11 all is provided with bracing piece 14, and the one end of bracing piece 14 is rotated with the lower extreme of flexible post 11 through a fixing base 31 and is connected, and the other end of bracing piece 14 is rotated with bottom plate 1 through another fixing base 31 and is connected for when flexible post 11 extends, play auxiliary stay's effect to it.

The end of the telescopic column 11, which is close to the sleeve 5, is fixed with a connecting rod 20, the end of the connecting rod 20, which is far away from the telescopic column 11, is fixed with a rack 15, the rack 15 and the connecting rod 20 are both positioned in the sleeve 5 on the same side, the rack 15 is in sliding connection with the sleeve 5, the end of the telescopic column 11, which is close to the sleeve 5, extends into the sleeve 5, the end of the telescopic column 11, which is positioned in the sleeve 5, is fixed with a limiting block 19, and the limiting block 19 is in sliding connection with the sleeve 5; a transmission assembly 13 is further arranged between the two sleeves 5, two ends of the transmission assembly 13 extend into the two sleeves 5, and two ends of the transmission assembly 13 are respectively connected with the two racks 15;

further, the transmission assembly 13 comprises a transmission rod 18, two ends of the transmission rod 18 extend into the two sleeves 5 respectively, two ends of the transmission rod 18 are fixed with gears 16, and the gears 16 are in meshed connection with the racks 15; one end of the transmission rod 18 penetrates through the sleeve 5 and extends to the outer side of the sleeve 5, one end of the transmission rod 18 located at the outer side of the sleeve 5 is fixedly provided with a rotating handle 17, and the transmission rod 18 can be conveniently rotated through the rotating handle 17.

Specifically, the tensioning assembly comprises a second rolling shaft 10, the second rolling shaft 10 is located at the position beside the first wheel shaft 9, the height of the second rolling shaft 10 is lower than that of the first wheel shaft 9, the two ends of the second rolling shaft 10 are respectively provided with an adjusting column 3, the lower end of the adjusting column 3 is fixedly connected with the bottom plate 1, the inner side of the adjusting column 3 is provided with an adjusting assembly 12, the end of the second rolling shaft 10 is movably connected with the adjusting column 3 through the adjusting assembly 12, and the lower end of the conveying belt 6 bypasses from the lower side of the second rolling shaft 10;

further, the adjusting component 12 comprises a telescopic rod 23, the upper end of the telescopic rod 23 is fixed with the adjusting column 3, the lower end of the telescopic rod 23 is fixed with a sliding block 22, the sliding block 22 is in sliding connection with the adjusting column 3, a first spring 24 is sleeved on the outer side of the telescopic rod 23, the lower end of the first spring 24 is attached to the sliding block 22, and the end portion of the second rolling shaft 10 is in rotary connection with the sliding block 22.

As can be seen, when the conveying device is required to stretch according to the situation, the rotating handle 17 is rotated, the driving rod 18 can transversely move through the racks 15 meshed with the gears 16 when the rotating handle 17 is rotated by the structural design of the gears 16 at the two ends of the driving rod 18, so that the racks 15 drive the connecting rod 20 to move the telescopic column 11 to one end, when the telescopic column 11 moves to one side far away from the driving rod 18, the telescopic column 11 drives the conveying belt 6 to extend to one side through the second driving shaft 8, and meanwhile, when the conveying belt 6 is extended, the conveying belt 6 can be extruded upwards by the second rolling shaft 10, and further, the conveying belt 6 is extended to one side on the premise that the length of the conveying belt 6 is unchanged, and due to the structural design of the limiting block 19, the telescopic column 11 is prevented from falling off from one end of the sleeve 5 due to excessive extension when the telescopic column 11 is extended;

when needing to shrink, then reverse rotation handle 17, through the structural design of adjusting part 12 this moment, make when conveyer belt 6 is received, the second roller bearing 10 that will be connected with slider 22 under the elastic action of first spring 24 promotes downwards, and then make conveyer belt 6 can keep the state of tightening all the time, thereby accomplish the length adjustment of device, avoided because of the unable length that changes of conveyer belt, need a plurality of conveyers to cooperate the use, when long-range transport, need use putty, leak material, the material damage scheduling problem that the concatenation of a plurality of conveyers caused.

Example 2:

for further optimization of the adjustable conveying device provided in embodiment 1, specifically, as shown in fig. 7 and 8, the upper end of the sleeve 5 and the position located at the end of the transmission component 13 are provided with a limiting component 30, the limiting component 30 comprises a clamping block 25, the clamping block 25 is located inside the sleeve 5, the clamping block 25 is slidably connected with the sleeve 5, the lower end of the clamping block 25 is cooperatively connected with the gear 16, the upper end of the clamping block 25 is fixedly provided with a handle 28, the upper end of the handle 28 extends to the outer side of the sleeve 5, the handle 28 is slidably connected with the sleeve 5, the inside of the sleeve 5 and the positions located at two sides of the clamping block 25 are slidably connected with a clamping buckle 26, one end of the clamping buckle 26 is buckled with the clamping block 25, the upper end and the lower end of the buckling end of the clamping buckle 26 are respectively provided with an inclined plane, the other end of the clamping buckle 26 is fixedly provided with a second spring 27, and one end of the second spring 27 away from the clamping buckle 26 is fixedly connected with the sleeve 5.

Through the above-mentioned structural design, when the device is adjusted to required length, drive fixture block 25 through pressing handle 28 and slide to sleeve 5's inside, simultaneously can extrude buckle 26 at the slip in-process of fixture block 25, make buckle 26 move to second spring 27 direction, when the lower extreme and the gear 16 meshing of fixture block 25, buckle 26 promotes buckle 26 and fixture block 25 lock under the elastic action of second spring 27 and is connected, can restrict the rotation of gear 16, when needing readjusting device length, through pulling handle 28 upwards drive fixture block 25 and remove, make buckle 26 be used for the fixture block 25 separation, when the both sides of fixture block 25 lower extreme are higher than buckle 26, then buckle 26 promotes buckle 26 to the one side that is close to fixture block 25 under the elastic action of second spring 27, thereby make buckle 25 unable down carry out spacing to gear 16, can accomplish the operation, avoid leading to be unstable after device length adjustment because of external force factor causes unable carry the assigned position with the material in the transportation, stability of the device in the course of operation has been promoted effectively.

The use process of the adjustable conveying device provided by the utility model is as follows:

when the conveying device is required to stretch according to the situation, the rotating handle 17 is rotated, the driving rod 18 can transversely move through the racks 15 meshed with the gears 16 when the rotating handle 17 is rotated through the structural design of the gears 16, so that the racks 15 drive the connecting rods 20 to move the telescopic columns 11 to one end, when the telescopic columns 11 move to one side far away from the driving rod 18, the telescopic columns 11 drive the conveying belt 6 to extend to one side through the second transmission shafts 8, and meanwhile, when the conveying belt 6 is extended, the conveying belt 6 can be enabled to extend, the second rolling shafts 10 can be extruded upwards, the conveying belt 6 can be extended to one side on the premise that the length of the conveying belt 6 is unchanged, and the telescopic columns 11 are prevented from falling off from one end of the sleeve 5 due to excessive extension due to the structural design of the limiting blocks 19;

when the conveyor belt 6 is retracted, the rotating handle 17 is reversely rotated, and the second roller 10 connected with the sliding block 22 is pushed downwards under the elastic action of the first spring 24 by the structural design of the adjusting assembly 12, so that the conveyor belt 6 can be kept in a tight state all the time, and the length adjustment of the device is completed.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims

1. An adjustable delivery device, comprising:

the novel lifting device comprises a bottom plate (1), wherein upright posts (2) are fixed at positions on two sides of the middle of the upper end of the bottom plate (1), sleeves (5) are transversely fixed at the top ends of the two upright posts (2), a first transmission shaft (7) and a second transmission shaft (8) are respectively arranged above the bottom plate (1) and at positions on two sides of the upright posts (2), the second transmission shaft (8) is connected with the sleeves (5) through a telescopic component, two ends of the first transmission shaft (7) are rotationally connected with transmission columns (4), and the lower ends of the transmission columns (4) are fixedly connected with the bottom plate (1); the first transmission shaft (7) and the second transmission shaft (8) are in transmission connection through a conveying belt (6);

a first wheel shaft (9) arranged at a position between the two upright posts (2), wherein the lower end of the conveying belt (6) bypasses the upper side of the first wheel shaft (9);

the tensioning assembly is arranged at the upper end of the bottom plate (1) and is positioned at the positions on two sides of the upright post (2) and used for tensioning and adjusting the conveying belt (6).

2. The adjustable conveying device according to claim 1, wherein the telescopic assembly comprises a telescopic column (11), two ends of the second transmission shaft (8) are rotatably connected with the telescopic column (11), one end, close to the sleeve (5), of the telescopic column (11) is fixedly provided with a connecting rod (20), one end, far away from the telescopic column (11), of the connecting rod (20) is fixedly provided with a rack (15), the rack (15) and the connecting rod (20) are located inside the sleeve (5) on the same side, the rack (15) is in sliding connection with the sleeve (5), one end, close to the sleeve (5), of the telescopic column (11) extends into the sleeve (5), one end, close to the sleeve (5), of the telescopic column (11) is fixedly provided with a limiting block (19), and the limiting block (19) is in sliding connection with the sleeve (5). And a transmission assembly (13) is further arranged between the two sleeves (5), two ends of the transmission assembly (13) extend into the two sleeves (5), and two ends of the transmission assembly (13) are respectively connected with the two racks (15).

3. The adjustable conveying device according to claim 2, wherein the transmission assembly (13) comprises a transmission rod (18), two ends of the transmission rod (18) extend into the two sleeves (5) respectively, gears (16) are fixed at two ends of the transmission rod (18), and the gears (16) are in meshed connection with racks (15); one end of the transmission rod (18) penetrates through the sleeve (5) and extends to the outer side of the sleeve (5), and one end of the transmission rod (18) located at the outer side of the sleeve (5) is fixed with a rotating handle (17).

4. The adjustable conveying device according to claim 1, wherein the tensioning assembly comprises a second roller (10), the second roller (10) is located at a position beside the first wheel shaft (9), the second roller (10) is lower than the first wheel shaft (9), two ends of the second roller (10) are provided with adjusting columns (3), the lower ends of the adjusting columns (3) are fixedly connected with the bottom plate (1), the inner sides of the adjusting columns (3) are provided with adjusting assemblies (12), the end portions of the second roller (10) are movably connected with the adjusting columns (3) through the adjusting assemblies (12), and the lower ends of the conveying belt (6) bypass from the lower portion of the second roller (10).

5. The adjustable conveying device according to claim 4, wherein the adjusting assembly (12) comprises a telescopic rod (23), the upper end of the telescopic rod (23) is fixed with the adjusting column (3), the lower end of the telescopic rod (23) is fixed with a sliding block (22), the sliding block (22) is slidably connected with the adjusting column (3), a first spring (24) is sleeved on the outer side of the telescopic rod (23), the lower end of the first spring (24) is attached to the sliding block (22), and the end portion of the second roller (10) is rotatably connected with the sliding block (22).

6. The adjustable conveying device according to claim 2, wherein supporting rods (14) are arranged below the telescopic columns (11), one ends of the supporting rods (14) are rotatably connected with the lower ends of the telescopic columns (11) through one fixing seat (31), and the other ends of the supporting rods (14) are rotatably connected with the bottom plate (1) through the other fixing seat (31).

7. The adjustable conveying device according to claim 1, wherein the upper end of the bottom plate (1) is further provided with a motor (21), the output end of the motor (21) and the end part of the first transmission shaft (7) are both fixed with transmission discs, and the transmission discs on the first transmission shaft (7) are connected with the transmission discs on the output end of the motor (21) through a transmission belt (29).

8. An adjustable conveying device according to claim 3, characterized in that a limit component (30) is arranged at the upper end of the sleeve (5) and at the position of the end part of the transmission component (13), the limit component (30) comprises a clamping block (25), the clamping block (25) is arranged inside the sleeve (5), the clamping block (25) is in sliding connection with the sleeve (5), the lower end of the clamping block (25) is in matched connection with the gear (16), a handle (28) is fixed at the upper end of the clamping block (25), the upper end of the handle (28) extends to the outer side of the sleeve (5), and the handle (28) is in sliding connection with the sleeve (5).

9. The adjustable conveying device according to claim 8, wherein the inside of the sleeve (5) and the positions located at two sides of the clamping block (25) are both connected with a buckle (26) in a sliding manner, one end of the buckle (26) is connected with the clamping block (25) in a buckling manner, the upper end and the lower end of one end of the buckle (26) buckled with the clamping block (25) are both provided with inclined planes, the other end of the buckle (26) is fixedly provided with a second spring (27), and one end, away from the buckle (26), of the second spring (27) is fixedly connected with the sleeve (5).