CN220885754U - Belt tensioning mechanism, express sorting vehicle and express conveying system - Google Patents

Abstract

The utility model relates to a belt tensioning mechanism, an express sorting vehicle and an express transportation system. The belt tensioning mechanism includes: a rod body; the sleeve assembly is sleeved on the periphery of the rod body and can rotate around the horizontal axis relative to the rod body, and the peripheral wall of the sleeve assembly can be abutted against the inner side of the express delivery conveying belt; the first lifting adjusting device is connected with one end of the rod body and is used for driving the rod body to drive the sleeve assembly to synchronously lift so as to tension the express delivery conveying belt; the sleeve assembly is detachably connected with a clutch, the clutch is fixedly connected with the driving end of a motor, and the motor is used for driving the clutch to rotate around a horizontal axis; when the clutch is separated from the sleeve assembly, the sleeve assembly synchronously rotates relative to the rod body along with the express delivery belt; when the clutch is connected with the sleeve assembly, the clutch drives the sleeve assembly to synchronously rotate, and then the express delivery conveying belt is driven to rotate in an auxiliary mode. The belt tensioning mechanism has the beneficial effects that the belt tensioning mechanism can simultaneously tension the belt and provide auxiliary driving force for the express delivery conveying belt.

Description

Belt tensioning mechanism, express sorting vehicle and express conveying system

Technical Field

The utility model relates to the technical field of express sorting, in particular to a belt tensioning mechanism, an express sorting vehicle and an express conveying system.

Background

Including being used for along the express delivery letter sorting car that the transfer chain removed in the express delivery conveying system, the express delivery letter sorting car removes to treat after the letter sorting position department and can convey the express delivery to sorting mechanism through the belt that sets up on it. The upper surface of the belt may form a sorting deck for receiving the express.

The express sorting operation needs to run continuously for a long time, but after the belt receives and conveys the express for a long time, the belt is easy to loose, and the loose belt cannot be stable or can not carry out the operation of receiving and conveying the express. Therefore, the express sorting vehicle is required to be provided with a tensioning mechanism to tension the belt so as to enable the express delivery system to stably operate for a long time.

Because the express weight difference borne on the belt is large, the driving force requirements for the belt are different. When the express delivery weight is great, if the driving force of belt is lower then can't drive the express delivery and remove.

However, the current belt tensioning mechanism can only tension the belt, and thus, there is a need for a tensioning mechanism capable of simultaneously tensioning the belt and providing an auxiliary driving force to the belt to improve the operational reliability of the belt.

Disclosure of utility model

First, the technical problem to be solved

In view of the above-mentioned drawbacks and shortcomings of the prior art, the present utility model provides a belt tensioning mechanism, an express sorting vehicle and an express transportation system, which solve the technical problem that the existing belt tensioning mechanism can only tension a belt, and lacks a tensioning mechanism capable of simultaneously tensioning the belt and providing an auxiliary driving force for the belt to improve the operation reliability of the belt.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:

In a first aspect, an embodiment of the present utility model provides a belt tensioning mechanism for an express sorting vehicle, including:

a rod body;

The sleeve assembly is sleeved on the periphery of the rod body and can rotate around the horizontal axis relative to the rod body, and the peripheral wall of the sleeve assembly can be abutted against the inner side of the express delivery conveying belt;

The first lifting adjusting device is connected with one end of the rod body and is used for driving the rod body to drive the sleeve assembly to synchronously lift so as to tension the express delivery conveying belt;

The sleeve assembly is detachably connected with a clutch, the clutch is fixedly connected with the driving end of a motor, and the motor is used for driving the clutch to rotate around a horizontal axis;

When the clutch is separated from the sleeve assembly, the sleeve assembly synchronously rotates relative to the rod body along with the express delivery conveying belt; when the clutch is connected with the sleeve assembly, the clutch drives the sleeve assembly to synchronously rotate, and then the express delivery conveying belt is driven to rotate in an auxiliary mode.

According to the present utility model, the first elevation adjustment apparatus includes:

the first vertical rod is inserted into and connected with the peripheral wall of the first end of the rod body in a threaded manner;

The fixing plate is used for penetrating and connecting the first vertical rod in a threaded manner;

When the first vertical rod is rotated, the first vertical rod can drive the rod body to synchronously lift relative to the fixed plate.

According to the utility model, the sleeve assembly comprises a sleeve and a synchronous sleeve connected with one end of the sleeve; the sleeve is sleeved on the periphery of the rod body, and the peripheral wall of the sleeve can be abutted against the inner side of the express delivery conveying belt; the synchronous sleeve is detachably connected with the clutch;

a bearing is sleeved between the sleeve and the rod body;

The inner peripheral wall of the sleeve is provided with a first annular groove, and a first limiting piece for abutting against the first end of the bearing is inserted into the first annular groove;

the inner peripheral wall of the rod body is provided with a second annular groove, and a second limiting piece used for abutting against the second end of the bearing is inserted into the second annular groove.

According to the utility model, the peripheral wall of the sleeve assembly is provided with a pressure sensor.

According to the utility model, the main body of the motor is fixedly connected with the motor frame;

the motor frame is connected with a second lifting adjusting device, and the second lifting adjusting device is used for driving the motor frame to drive the motor and the clutch to synchronously lift, so that the clutch and the synchronous sleeve are coaxial.

According to the present utility model, the second elevation adjustment apparatus includes:

a support plate positioned below the motor frame;

A second vertical rod which is inserted into the supporting plate and the motor frame in sequence from bottom to top and is connected with the supporting plate and the motor frame in a threaded manner;

when the second vertical rod rotates, the second vertical rod can drive the motor and the clutch to synchronously lift relative to the supporting plate through the motor frame.

In a second aspect, the utility model further provides an express sorting vehicle, which comprises a vehicle frame, and the express conveying belt and the belt tensioning mechanism for the express sorting vehicle which are all arranged on the vehicle frame.

According to the utility model, the frame is of a frame structure, two express delivery conveying belts which are positioned on the same plane are arranged in the frame, each express delivery conveying belt is correspondingly provided with one belt tensioning mechanism, and the two belt tensioning mechanisms respectively correspond to opposite ends of the two express delivery conveying belts.

According to the utility model, the side wall of the frame is provided with a lifting hole for the sleeve assembly or the clutch to pass through.

In a third aspect, the utility model further provides an express delivery transportation system, which comprises the express delivery sorting vehicles, an express delivery transportation line for the movement of the express delivery sorting vehicles, and a package supply platform for storing and transmitting the express delivery to each express delivery sorting vehicle.

(III) beneficial effects

The beneficial effects of the utility model are as follows: according to the belt tensioning mechanism, the rod body, the sleeve assembly and the first lifting adjusting device are arranged, and the sleeve assembly can be driven by the first lifting adjusting device to synchronously lift to tension the express delivery conveying belt, so that the express delivery conveying belt on the express delivery sorting vehicle can stably receive and convey express delivery for a long time, and the tensioning degree of the sleeve assembly on the express delivery conveying belt can be conveniently and rapidly achieved. Meanwhile, the sleeve assembly is abutted to the express delivery conveying belt and synchronously rotates relative to the rod body along with the express delivery conveying belt, and the rod body drives the sleeve assembly to synchronously lift, so that mechanical non-electric lifting adjustment is realized, the belt tensioning mechanism is prevented from being damaged, and the service life is prolonged.

Furthermore, through setting up sleeve subassembly detachable connection clutch, the drive end of clutch fixed connection motor, motor drive clutch rotates around the horizontal axis to make:

when the weight of the express delivered by the express delivery conveying belt is lower than a set weight value, the clutch is separated from the sleeve assembly, and the sleeve assembly synchronously rotates relative to the rod body along with the express delivery conveying belt;

when express delivery weight that express delivery conveyer belt transmitted is higher than the settlement weight value, the clutch coupling sleeve subassembly, and the clutch drives sleeve subassembly synchronous rotation to supplementary drive express delivery conveyer belt rotates.

Therefore, the belt tensioning mechanism can simultaneously tension the belt and provide auxiliary driving force for the express delivery conveying belt, and the operation reliability of the express delivery conveying belt is improved.

Drawings

Fig. 1 is a schematic perspective view of an express sorting vehicle of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is an internal schematic view of FIG. 1;

FIG. 4 is a schematic view of the assembly of the rod and sleeve;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is an exploded view of FIG. 4;

FIG. 7 is a perspective view of a rod body;

FIG. 8 is a schematic illustration of the connection of the synchronizing sleeve and clutch;

Fig. 9 is a schematic perspective view of the express delivery system of the present utility model.

[ Reference numerals description ]

1: A rod body; 11: a second annular groove; 12: a second limiting piece; 13: a first connection hole;

2: a sleeve; 21: a first annular groove; 22: a first limiting member;

3: a bearing;

4: a first lifting adjusting device; 41: a first vertical rod; 42: a fixing plate; 44: a first nut;

51: a synchronizing sleeve; 52: a clutch; 53: a motor; 531: a motor frame;

6: and a second lifting adjusting device: 61: a support plate; 62: a second vertical rod; 63: a second nut;

7: a frame; 71: lifting holes;

8: a belt;

9: express delivery transportation line.

Detailed Description

The utility model will be better explained by the following detailed description of the embodiments with reference to the drawings. Wherein references herein to "upper", "lower", etc. are made to the orientation of fig. 1.

Example 1

Referring to fig. 1-9, a belt tensioning mechanism for an express sorting vehicle according to an embodiment of the present utility model includes a rod body 1, a sleeve assembly, and a first lifting adjustment device 4.

The rod body 1 is sleeved on the periphery of the rod body 1 and can rotate around a horizontal axis relative to the rod body 1. The outer peripheral wall of sleeve subassembly can the inboard of butt express delivery conveyer belt 8. The first lifting adjusting device 4 is connected with one end of the rod body 1, and the first lifting adjusting device 4 is used for driving the rod body 1 to drive the sleeve assembly to synchronously lift so as to tension the express delivery conveying belt 8. The sleeve assembly is detachably connected with a clutch 52, the clutch 52 is fixedly connected with the driving end of a motor 53, and the motor 53 is used for driving the clutch 52 to rotate around the horizontal axis.

When the clutch 52 is separated from the sleeve assembly, the sleeve assembly synchronously rotates relative to the rod body 1 along with the express delivery belt 8;

When the clutch 52 is connected with the sleeve assembly, the clutch 52 drives the sleeve assembly to synchronously rotate, so as to assist in driving the express delivery conveyor belt 8 to rotate.

According to the belt tensioning mechanism, the rod body 1, the sleeve assembly and the first lifting adjusting device 4 are arranged, and the sleeve assembly can be driven by the first lifting adjusting device 4 to synchronously lift so as to tension the express delivery conveying belt 8, so that the express delivery conveying belt 8 on the express delivery sorting vehicle can stably receive and convey express delivery for a long time, and the tensioning degree of the sleeve assembly on the express delivery conveying belt 8 can be conveniently realized. Meanwhile, the sleeve assembly is abutted to the express delivery conveying belt 8 and synchronously rotates relative to the rod body 1 along with the express delivery conveying belt 8, and the sleeve assembly is driven by the rod body 1 to synchronously lift, so that mechanical non-electric lifting adjustment is realized, the belt tensioning mechanism is prevented from being damaged, and the service life is prolonged.

Further, by providing the sleeve assembly detachably coupled clutch 52, the clutch 52 is fixedly coupled to the drive end of the motor 53, and the motor 53 drives the clutch 52 to rotate about the horizontal axis, such that:

When the weight of the express delivered by the express delivery conveying belt 8 is lower than a set weight value, the clutch 52 is separated from the sleeve assembly, and the sleeve assembly synchronously rotates relative to the rod body 1 along with the express delivery conveying belt 8;

when the express delivery weight transmitted by the express delivery conveying belt 8 is higher than a set weight value, the clutch 52 is connected with the sleeve assembly, and the clutch 52 drives the sleeve assembly to synchronously rotate so as to assist in driving the express delivery conveying belt 8 to rotate.

From this, this belt tensioning mechanism can be simultaneously to belt tensioning and for express delivery conveyor belt 8 provides auxiliary driving power, has improved express delivery conveyor belt 8's operational reliability.

Further, the sleeve assembly comprises a sleeve 2 and a synchronizing sleeve 51 connected to one end of the sleeve 2.

The sleeve 2 cover is located body of rod 1 periphery, and the inboard of express delivery conveyer belt 8 can be butt to sleeve 2's periphery wall. The synchronizing sleeve 51 is detachably connected to the clutch 52.

Preferably, the clutch 52 is preferably an electromagnetic clutch. The belt tensioning mechanism also includes a battery connected to and powering the clutch 52. The synchronizing sleeve comprises a synchronizing sleeve main body and a magnetic body. One end of the synchronizing sleeve main body is fixedly connected with the sleeve 2, and the other end of the synchronizing sleeve main body is fixedly connected with the magnetic body. Preferably, the main body of the synchronous sleeve is made of nylon, and the magnetic body is an armature.

When the battery supplies power to the clutch 52, a magnetic field is generated between the clutch 52 and the magnetic body, the clutch 52 is magnetically attracted to the connecting sleeve 2, and the clutch 52 drives the sleeve 2 to synchronously rotate;

When the battery stops supplying power to the clutch 52, the clutch 52 and the magnetic body are separated.

Preferably, the periphery wall of sleeve 2 sets up pressure sensor, and pressure sensor is used for monitoring express delivery conveyer belt 8's tensioning force to in time drive sleeve 2 synchronous lift through first lift adjusting device 4 drive body of rod 1, in time adjust express delivery conveyer belt 8's tensioning degree.

Further, the first elevation adjustment apparatus 4 includes a first vertical rod 41 and a fixing plate 42.

The first vertical rod 41 is inserted and screwed on the peripheral wall of the first end of the rod body 1. The fixing plate 42 is used for penetrating and screwing the first vertical rod 41.

When the first vertical rod 41 is rotated, the first vertical rod 41 can drive the rod body 1 to synchronously lift relative to the fixing plate 42, and the rod body 1 drives the sleeve 2 to synchronously lift.

Specifically, the first lifting adjusting device 4 further includes two first nuts 44 sleeved on the first vertical rod 41, and the two first nuts 44 respectively abut against the upper end and the lower end of the fixing plate 42, so as to improve the stability of the first vertical rod 41 supporting the rod body 1.

Further, a bearing 3 is sleeved between the sleeve 2 and the rod body 1.

The inner peripheral wall of the sleeve 2 is provided with a first annular groove 21, and a first stopper 22 for abutting against the first end of the bearing 3 is inserted into the first annular groove 21.

The inner peripheral wall of the rod body 1 is provided with a second annular groove 11, and a second limiting piece 12 for abutting against the second end of the bearing 3 is inserted into the second annular groove 11.

By assembling and disassembling the first limiting piece 22 and the second limiting piece 12, the positions of the two ends of the bearing 3 are limited by the first limiting piece 22 and the second limiting piece 12, and the assembling and disassembling of the sleeve 2, the rod body 1 and the bearing 3 can be realized conveniently.

Preferably, the first limiting member 22 and the second limiting member 12 are snap springs for easy assembly and disassembly.

Specifically, the number of the bearings 3 is two, and the two bearings 3 are respectively located at both ends of the sleeve 2 and the rod body 1 to improve the rotation supporting force to the sleeve 2.

Further, the main body of the motor 53 is fixedly connected to the motor frame 531.

Further, a second lifting adjusting device 6 is connected to the motor frame 531, and the second lifting adjusting device 6 is used for driving the motor frame 531 to drive the motor 53 and the clutch 52 to synchronously lift, so that the clutch 52 and the synchronizing sleeve 51 are coaxial.

Specifically, the second elevation adjustment apparatus 6 further includes a support plate 61 and a second vertical rod 62.

The support plate 61 is located below the motor frame 531. The second vertical rod 62 is inserted and screwed on the support plate 61 and the motor frame 531 from bottom to top in sequence.

When the second vertical rod 62 is rotated, the second vertical rod 62 can drive the motor frame 531 to lift relative to the support plate 61, and the motor frame 531 drives the motor 53 and the clutch 52 to lift synchronously relative to the support plate 61.

Specifically, the second lifting adjusting device 6 further includes two second nuts 63 sleeved on the second vertical rod 62, and the two second nuts 63 respectively abut against the upper end and the lower end of the supporting plate 61, so as to improve the stability when the second vertical rod 62 supports the motor frame 531.

Example 2

The embodiment also provides an express sorting vehicle on the basis of embodiment 1, the express sorting vehicle comprises a frame 7, and an express conveying belt 8 and a belt tensioning mechanism which are all arranged on the frame 7.

The express delivery conveyer belt 8 is used for accepting the express delivery, and after the express delivery letter sorting car drove the express delivery that accepts and remove to the letter sorting check mouth that corresponds to appointed route post, express delivery conveyer belt 8 can rotate and drive the express delivery that accepts and remove to in the letter sorting check mouth, accomplishes the letter sorting.

Specifically, the frame 7 is a frame structure, two express delivery conveying belts 8 which are positioned on the same plane are arranged in the frame 7, a belt tensioning mechanism is correspondingly arranged on each express delivery conveying belt 8, and the two belt tensioning mechanisms respectively correspond to opposite ends of the two express delivery conveying belts 8 so as to avoid mutual interference.

Two express delivery conveyor belts 8 simultaneously accept an express delivery, can improve and accept stability to can improve the reliability when driving the express delivery to remove the letter sorting check mouth.

Specifically, the fixing plate 42 and the support plate 61 are both fixed to the frame 7. Preferably, the fixing plate 42 is fixed inside the frame 7, and the supporting plate 61 is fixed outside the frame 7, so as to reduce the overall volume of the express sorting vehicle.

Specifically, a lifting hole 71 through which the synchronizing sleeve 51 or the clutch 52 passes is provided on the side wall of the frame 7.

Further, when the weight of the express delivered by the express delivery conveying belt 8 is lower than the set weight value, the clutch 52 is separated from the synchronizing sleeve 51, and the sleeve 2 synchronously rotates relative to the rod body 1 along with the express delivery conveying belt 8;

when the express weight is higher than the set weight value, the clutch 52 is connected with the synchronizing sleeve 51, and the clutch 52 drives the synchronizing sleeve 51 and the sleeve 2 to synchronously rotate.

Example 3

The embodiment also provides an express delivery transportation system based on embodiments 1 and 2, which comprises an express delivery sorting vehicle, an express delivery transportation line 9 for the movement of the express delivery sorting vehicle, and a package supply table for storing and conveying the express delivery to each express delivery sorting vehicle.

Further, the express sorting vehicle further comprises a driving wheel which is used for sleeving and driving the express conveying belt 8 to rotate, and the driving wheel is fixedly connected with the driving end of the driving motor. The driving motor is used for driving the driving wheel to drive the express delivery conveying belt 8 to rotate.

Further, the express delivery transportation system further comprises a PLC controller, and the PLC controller is in communication connection with electronic equipment such as a motor 53, a battery, a driving motor, a pressure sensor and the like in the express delivery transportation system. The PLC controller can control electronic equipment such as a motor 53, a battery, a driving motor and the like to start and stop, regulate the rotation speeds of the motor 53 and the driving motor, and can receive the tension information of the express delivery conveying belt 8 sent by the pressure sensor.

Further, the express delivery system includes four control modes for controlling the connection and disconnection of the clutch 52 and the sleeve 2 by the PLC controller:

The first way is: the bag supply table is provided with a weighing device for measuring the weight of the express, the weighing device is connected with the PLC in a communication mode, and the weighing device sends the weight information of the express to the PLC. When the weight of the express received by the express sorting vehicle and received by the PLC is lower than a set weight value, the battery and the motor 53 are controlled to be closed, the clutch 52 is separated from the synchronous sleeve 51, and the express sorting vehicle operates normally; when the weight of the express received by the express sorting vehicle and received by the PLC is higher than a set weight value, the PLC controls the battery to supply power to the clutch 52 and controls the motor 53 to drive the clutch 52 to rotate, and controls the rotating speed of the motor 53 to be consistent with that of the driving motor, so that the clutch 52 is magnetically connected with the synchronizing sleeve 51, and the clutch 52 drives the synchronizing sleeve 51 and the sleeve 2 to synchronously rotate so as to assist in driving the express conveying belt 8 to rotate.

The second mode is as follows: the sleeve 2 is provided with an encoder or a speed sensor which is in communication connection with a PLC controller. The encoder or speed sensor is used to monitor the linear speed of the sleeve 2 and transmit the linear speed information to the PLC controller. When the PLC receives that the linear speed of the sleeve 2 is lower than the rotating speed of the driving motor, judging that the express delivery conveying belt 8 cannot normally rotate due to the fact that the received express delivery weight is larger and higher than a set weight value, the PLC controls a battery to supply power to the clutch 52 and controls the motor 53 to drive the clutch 52 to rotate, and controls the rotating speed of the motor 53 to be consistent with the rotating speed of the driving motor, so that the clutch 52 is connected with the synchronous sleeve 51 in a magnetic attraction mode, and the clutch 52 drives the synchronous sleeve 51 and the sleeve 2 to synchronously rotate to assist in driving the express delivery conveying belt 8 to rotate; when the PLC receives that the linear speed of the sleeve 2 is consistent with the rotating speed of the driving motor, the battery and the motor 53 are controlled to be closed, the clutch 52 is separated from the synchronous sleeve 51, and the express sorting vehicle runs normally.

The third way is: and a visual camera is further arranged on the express delivery transportation line 9 and is in communication connection with the PLC. The vision camera is used for monitoring whether the express delivery conveyer belt 8 on the express delivery letter sorting car normally rotates when driving the express delivery that receives to sort the check mouth to send monitoring information to the PLC controller. When the PLC controller receives that the express delivery conveying belt 8 cannot rotate, judging that the express delivery conveying belt 8 cannot normally rotate due to the fact that the received express delivery weight is larger and higher than a set weight value, the PLC controller controls a battery to supply power to a clutch 52 and controls a motor 53 to drive the clutch 52 to rotate, and controls the linear speed of the motor 53 to be consistent with the rotating speed of a driving motor, so that the clutch 52 is in magnetic attraction connection with a synchronous sleeve 51, and the clutch 52 drives the synchronous sleeve 51 and a sleeve 2 to synchronously rotate so as to assist in driving the express delivery conveying belt 8 to rotate; when the PLC receives that the linear speed of the sleeve 2 is consistent with the rotating speed of the driving motor, the battery and the motor 53 are controlled to be closed, the clutch 52 is separated from the synchronous sleeve 51, and the express sorting vehicle runs normally.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (10)

1. A belt tensioning mechanism for express delivery letter sorting car, its characterized in that includes:

A rod body (1);

The sleeve assembly is sleeved on the periphery of the rod body (1) and can rotate around a horizontal axis relative to the rod body (1), and the peripheral wall of the sleeve assembly can be abutted against the inner side of the express delivery conveying belt (8);

the first lifting adjusting device (4) is connected with one end of the rod body (1), and the first lifting adjusting device (4) is used for driving the rod body (1) to drive the sleeve assembly to synchronously lift so as to tension the express delivery conveying belt (8);

The sleeve assembly is detachably connected with a clutch (52), the clutch (52) is fixedly connected with the driving end of a motor (53), and the motor (53) is used for driving the clutch (52) to rotate around a horizontal axis;

When the clutch (52) is separated from the sleeve assembly, the sleeve assembly synchronously rotates relative to the rod body (1) along with the express delivery belt (8); when the clutch (52) is connected with the sleeve assembly, the clutch (52) drives the sleeve assembly to synchronously rotate, and further the express delivery conveying belt (8) is driven to rotate in an auxiliary mode.

2. Belt tensioning mechanism for express sorting carts according to claim 1, characterized in that the first lifting adjustment means (4) comprise:

A first vertical rod (41) inserted and screwed on the peripheral wall of the first end of the rod body (1);

A fixing plate (42) for threading and screwing the first vertical rod (41);

When the first vertical rod (41) is rotated, the first vertical rod (41) can drive the rod body (1) to synchronously lift relative to the fixing plate (42).

3. Belt tensioning mechanism for express sorting carts according to claim 1, characterized in that the sleeve assembly comprises a sleeve (2) and a synchronizing sleeve (51) connected to one end of the sleeve (2); the sleeve (2) is sleeved on the periphery of the rod body (1), and the peripheral wall of the sleeve (2) can be abutted against the inner side of the express delivery conveying belt (8); the synchronizing sleeve (51) is detachably connected with the clutch (52);

A bearing (3) is sleeved between the sleeve (2) and the rod body (1);

The inner peripheral wall of the sleeve (2) is provided with a first annular groove (21), and a first limiting piece (22) used for abutting against the first end of the bearing (3) is inserted into the first annular groove (21);

The inner peripheral wall of the rod body (1) is provided with a second annular groove (11), and a second limiting piece (12) used for abutting against the second end of the bearing (3) is inserted into the second annular groove (11).

4. The belt tensioning mechanism for an express sorting vehicle of claim 1, wherein the peripheral wall of the sleeve assembly is provided with a pressure sensor.

5. The belt tensioning mechanism for an express sorting vehicle of claim 1, wherein:

the main body of the motor (53) is fixedly connected with a motor frame (531);

The motor frame (531) is connected with a second lifting adjusting device (6), and the second lifting adjusting device (6) is used for driving the motor frame (531) to drive the motor (53) and the clutch (52) to synchronously lift, so that the clutch (52) and the synchronous sleeve (51) are coaxial.

6. Belt tensioning mechanism for express sorting carts according to claim 5, characterized in that the second lifting adjustment means (6) comprise:

a support plate (61) located below the motor frame (531);

A second vertical rod (62) which is inserted in sequence from bottom to top and is connected with the supporting plate (61) and the motor frame (531) in a threaded manner;

When the second vertical rod (62) is rotated, the second vertical rod (62) can drive the motor (53) and the clutch (52) to synchronously lift relative to the supporting plate (61) through the motor frame (531).

7. An express sorting vehicle, characterized by comprising a vehicle frame (7), and the express conveying belt (8) and the belt tensioning mechanism for the express sorting vehicle according to any one of claims 1-6 which are all arranged on the vehicle frame (7).

8. The express sorting vehicle of claim 7, wherein,

The frame (7) is of a frame structure, two express delivery conveying belts (8) which are positioned on the same plane are arranged in the frame (7), each express delivery conveying belt (8) is correspondingly provided with one belt tensioning mechanism, and the two belt tensioning mechanisms are respectively corresponding to opposite ends of the two express delivery conveying belts (8).

9. Express sorting vehicle according to claim 8, characterized in that the side wall of the frame (7) is provided with a lifting hole (71) through which the sleeve assembly or the clutch (52) passes.

10. An express delivery transportation system, characterized by comprising an express delivery sorting vehicle according to any one of claims 7-9, an express delivery transportation line (9) for the movement of the express delivery sorting vehicle, and a bag supply table for storing and transferring the express delivery to each of the express delivery sorting vehicles.