Transmission shaft non-return device and belt conveyor

Abstract

The utility model relates to the technical field of non-return of belt conveyors, and discloses a transmission shaft non-return device and a belt conveyor. The transmission shaft non-return device comprises a fixed seat, a locking mechanism and a one-way bearing. An inner ring of the one-way bearing is in interference fit with a transmission shaft of the belt conveyor; the outer ring of the one-way bearing is spaced from the fixed seat and can rotate relative to the fixed seat, and the fixed seat is connected to a rack of the belt conveyor; the locking mechanism is mounted on the fixed seat and can move between a locking position and an unlocking position; when the locking mechanism is located at the locking position, the locking mechanism is connected with the outer ring of the one-way bearing to fix the outer ring of the one-way bearing; when the locking mechanism is located at the releasing position, the locking mechanism is disconnected with the outer ring of the one-way bearing so that the outer ring of the one-way bearing can rotate relative to the fixing base. According to the transmission shaft non-return device, the locking mechanism with the locking position and the unlocking position is arranged, so that one-way non-return of the transmission shaft of the belt conveyor during operation and two-way rotation of the transmission shaft during maintenance are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of belt conveyor backstop, specifically relates to a transmission shaft backstop device and belt conveyor. BACKGROUND

[0002] In the tobacco primary processing, a large number of belt conveyors are used to transport tobacco leaves or tobacco. Part of the belt conveyors has a large conveying angle and small transmission of the speed reducer, and when the tobacco products are running, the conveying belt may be reversed due to the gravity of the material, resulting in the accumulation of tobacco at the inlet end of the conveying belt, which seriously reduces the production continuity.

[0003] At present, the common solution to the above problem is to replace the driving motor with a brake motor, and the brake device in the motor can mechanically lock the transmission shaft when power is off, thereby preventing the reverse rotation of the conveying belt.

[0004] Although this solution can effectively prevent the reverse rotation of the conveying belt, this method has significant defects in the equipment maintenance link: because the brake device makes the transmission shaft enter the self-locking state when the equipment is stopped, when the maintenance personnel need to manually rotate the transmission shaft for inspection, they must additionally disconnect the brake motor and the transmission shaft to perform the inspection operation, and after the inspection is completed, the transmission shaft and the brake motor are connected again. The whole inspection process takes a long time, greatly increasing the complexity of the repair process. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the problem of difficult maintenance of the method of preventing the reverse rotation of the belt conveyor by using the brake motor.

[0006] To achieve the above object, the utility model provides a transmission shaft backstop device, which comprises a fixing seat, a locking mechanism and a one-way bearing. The inner ring of the one-way bearing is in interference fit with the transmission shaft of the belt conveyor; the outer ring of the one-way bearing is spaced apart from the fixing seat and can rotate relative to the fixing seat, and the fixing seat is used for connecting to the rack of the belt conveyor; the locking mechanism is installed on the fixing seat and can move between the locking position and the release position; when the locking mechanism is located at the locking position, the locking mechanism is connected with the outer ring of the one-way bearing to fix the outer ring of the one-way bearing; when the locking mechanism is located at the release position, the locking mechanism is disconnected from the outer ring of the one-way bearing to allow the outer ring of the one-way bearing to rotate relative to the fixing seat.

[0007] In some embodiments, the fixing seat circumferentially surrounds the one-way bearing, and the outer ring of the one-way bearing is in clearance fit with the fixing seat.

[0008] In some embodiments, the locking mechanism comprises a fixing rod, the fixing rod is arranged through the fixing base along a radial direction of the one-way bearing, and the fixing rod is movable between a locking position and a releasing position; when the fixing rod is in the locking position, the fixing rod is connected with the outer ring of the one-way bearing to fix the outer ring of the one-way bearing; when the fixing rod is in the releasing position, the locking mechanism is disconnected with the outer ring of the one-way bearing to allow the outer ring of the one-way bearing to rotate relative to the fixing base.

[0009] In some embodiments, the locking mechanism comprises a first nut, the first nut is fixedly arranged in the fixing base, and the fixing rod is arranged through the first nut and is threadedly connected with the first nut, so that the fixing rod is movable between the locking position and the releasing position by being screwed.

[0010] In some embodiments, the locking mechanism further comprises a second nut and a limiting assembly, the second nut is arranged in the fixing base and is threadedly connected with the fixing base, the fixing rod is movably arranged through the second nut along an axial direction of the second nut, an outer portion of the fixing rod is sleeved with a spring, a top end of the spring is abutted against a bottom surface of the second nut, and a bottom end of the spring is fixedly connected with the fixing rod, and the spring is configured to apply an elastic force to the fixing rod towards the one-way bearing; the limiting assembly is configured to lock the fixing rod in the locking position or the releasing position.

[0011] In some embodiments, the limiting assembly comprises a clamping ring and a rotating head, the clamping ring is fixedly installed on a side of the second nut away from the one-way bearing, and the fixing rod is movably arranged through the clamping ring; the side of the clamping ring away from the one-way bearing is provided with two first clamping grooves, and the two first clamping grooves are distributed opposite to each other in a radial direction of the clamping ring; the rotating head is fixedly connected with an end of the fixing rod away from the one-way bearing, and a side of the rotating head towards the one-way bearing is provided with two insertion blocks, and the two insertion blocks are distributed opposite to each other in the radial direction of the clamping ring; when the two insertion blocks are respectively inserted into the two first clamping grooves, the fixing rod is locked in the releasing position; when bottom surfaces of the two insertion blocks are abutted against the side of the clamping ring away from the one-way bearing, the fixing rod is locked in the locking position.

[0012] In some embodiments, the outer ring of the one-way bearing is provided with a plurality of fixing holes distributed at intervals along a circumferential direction of the outer ring; when the fixing rod is in the locking position, the fixing rod is inserted into one of the fixing holes to fix the outer ring of the one-way bearing; when the fixing rod is in the releasing position, the fixing rod is disconnected from the fixing hole to allow the outer ring of the one-way bearing to rotate relative to the fixing base.

[0013] In some embodiments, all the fixing holes are uniformly distributed along the circumferential direction of the outer ring of the one-way bearing.

[0014] In some embodiments, the transmission shaft reverse stop device further comprises a torque arm and a connecting piece, one end of the torque arm is connected with the fixing base through the connecting piece, and the other end of the torque arm is connected with a rack of the belt conveyor.

[0015] The utility model discloses a conveying device on the other side provides a kind of, the conveying device includes belt conveyor and the transmission shaft reverse stop device in above-mentioned embodiment, the inner ring of one-way bearing is fixedly covered in the transmission shaft of the drive motor of belt conveyor, fixed seat is connected to the rack of belt conveyor.

[0016] The above technical solution of the utility model has the following beneficial effects:

[0017] The transmission shaft reverse stop device is installed at the end of the transmission shaft of belt conveyor away from the drive motor. When the belt conveyor is working normally, to prevent it from reversing under the influence of material gravity in the case of sudden stop, the locking mechanism is moved to the locking position, so that the outer ring of the one-way bearing is fixed to the fixed seat by the locking mechanism; under the restriction of the one-way bearing, the transmission shaft can only rotate in one direction, so that the reverse rotation of the belt conveyor can be prevented. When the belt conveyor stops and enters the maintenance work, the locking mechanism is moved to the release position, so that the outer ring of the one-way bearing and the fixed seat are disconnected, and the outer ring of the one-way bearing can rotate relative to the fixed seat in the forward or reverse direction, so that the maintenance personnel can rotate the transmission shaft in the forward or reverse direction to check and maintain it. Therefore, the transmission shaft reverse stop device of the utility model realizes one-way reverse and bidirectional rotation of the transmission shaft of the belt conveyor by setting the locking mechanism with locking position and release position. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the installation top view and sectional view of the transmission shaft reverse stop device of an embodiment of the utility model;

[0019] Figure 2 is the schematic diagram of the locking mechanism of an embodiment of the utility model;

[0020] Figure 3 is the schematic diagram of the locking mechanism in release position of an embodiment of the utility model.

[0021] REFERENCE SIGNS

[0022] 1, fixed seat; 2, locking mechanism; 21, fixed rod; 22, second nut; 23, limiting assembly; 231, clamping ring; 2311, first clamping groove; 232, rotating head; 2321, plug; 24, spring; 3, one-way bearing; 31, outer ring; 311, fixed hole; 32, inner ring; 4, first fixing mechanism; 6, transmission shaft; 7, torque arm; 71, connecting piece. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model is described in detail below. It should be understood that the specific implementation described here is only used to illustrate and explain the utility model, and is not used to limit the utility model.

[0024] In the utility model, in the case that no opposite illustration is made, the orientation words such as "upper, lower" used are usually the orientation in the assembled use state."Inner, outer" refers to the inner, outer relative to the outline of each component.

[0025] It should be noted that the terms "first", "second" and the like in the description and in the claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be interchanged. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or equipment including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0026] As Figure 1 The utility model provides a transmission shaft check device, this transmission shaft check device includes fixed seat 1, locking mechanism 2 and one way bearing 3. The inner ring 32 of one way bearing 3 is interference fit with the transmission shaft 6 of belt conveyor, the outer ring 31 of one way bearing 3 is spaced apart from fixed seat 1 and can rotate relative to fixed seat 1, and fixed seat 1 is used to connect to the rack of belt conveyor, locking mechanism 2 is installed on fixed seat 1 and can move between locking position and release position, when locking mechanism 2 is located in locking position, locking mechanism 2 is connected with the outer ring 31 of one way bearing 3 to fix the outer ring 31 of one way bearing 3, when locking mechanism 2 is located in release position, locking mechanism 2 is disconnected with the outer ring 31 of one way bearing 3 to allow the outer ring 31 of one way bearing 3 to rotate relative to fixed seat 1.

[0027] Specifically, the transmission shaft check device is installed on the end of the transmission shaft 6 of belt conveyor away from the driving motor. When the belt conveyor is working normally, to prevent it from reversing under the influence of material gravity in the case of sudden stop, locking mechanism 2 is moved to locking position, so that the outer ring 31 of one way bearing 3 is fixed to fixed seat 1 by locking mechanism 2, under the restriction of one way bearing 3, transmission shaft 6 can only rotate in one direction, so that the reverse rotation of belt conveyor can be prevented. When the belt conveyor stops to enter the maintenance work, locking mechanism 2 is moved to release position, so that the outer ring 31 of one way bearing 3 and fixed seat 1 are disconnected, and the outer ring 31 of one way bearing 3 can rotate relative to fixed seat 1 in forward or reverse direction, so that the maintenance personnel can rotate transmission shaft 6 in forward or reverse direction to check and maintain it. Therefore, the transmission shaft check device of the utility model realizes one-way check and bidirectional rotation during maintenance of the transmission shaft 6 of belt conveyor by setting locking mechanism 2 with locking position and release position.

[0028] In addition, the original bearing is matched with the one-way bearing 3 in combination, so that the transmission shaft 6 has the one-way rotation function, and the bearing system has improved load capacity. The design not only effectively prolongs the service life of the one-way bearing 3, but also ensures that the belt conveyor can be stably operated for a long time. In addition, the utility model has the advantages of simple transformation process, low cost, and completely retains all the functional characteristics of the original equipment.

[0029] It should be noted that the fixed seat 1 can be a block-shaped component formed around the outer ring 31 of the one-way bearing 3, or can be an annular component, as long as the fixed seat 1 can fix the outer ring 31 of the one-way bearing 3 to the rack under the action of the locking mechanism 2.

[0030] In some embodiments of the utility model, the fixed seat 1 circumferentially surrounds the one-way bearing 3, and the outer ring 31 of the one-way bearing 3 is in clearance fit with the fixed seat 1.

[0031] Specifically, when the locking mechanism 2 is located at the release position, the outer ring 31 of the one-way bearing 3 can rotate axially in the fixed seat 1.

[0032] In some embodiments of the utility model, the locking mechanism 2 includes a fixed rod 21, the fixed rod 21 is provided in the fixed seat 1 along the radial direction of the one-way bearing 3, and the fixed rod 21 can move between the locking position and the release position; when the fixed rod 21 is located at the locking position, the fixed rod 21 is connected with the outer ring 31 of the one-way bearing 3 to fix the outer ring 31 of the one-way bearing 3; when the fixed rod 21 is located at the release position, the locking mechanism 2 is disconnected with the outer ring 31 of the one-way bearing 3 to allow the outer ring 31 of the one-way bearing 3 to rotate relative to the fixed seat 1.

[0033] Specifically, when the fixed rod 21 enters the locking position, the fixed rod 21 binds the outer ring 31 of the one-way bearing 3 with the fixed seat 1, so that the outer ring 31 of the one-way bearing 3 cannot rotate in the fixed seat 1, thereby making the transmission shaft 6 sleeved with the one-way bearing 3 can only rotate in one direction.

[0034] In some embodiments, the fixed rod 21 in the locking position is in abutment with the outer ring 31 of the one-way bearing 3 to fix the outer ring 31 of the one-way bearing 3. In order to make the fixing effect of the outer ring 31 of the one-way bearing 3 better, the outer circumferential surface of the outer ring 31 of the one-way bearing 3 is processed with a frosted layer, and the part of the fixed rod 21 abutting against the outer circumferential surface at the locking position is also frosted.

[0035] In some embodiments of the utility model, the locking mechanism 2 includes a first nut, the first nut is fixedly embedded in the fixed seat 1, and the fixed rod 21 passes through the first nut and is threadedly connected with the first nut, so that the fixed rod 21 can move between the locking position and the release position by being screwed.

[0036] Specifically, the fixed rod 21 is processed with external threads, and the first nut is processed with internal threads, and the two are threadedly connected; positive rotation or reverse rotation of the fixed rod 21 can move the fixed rod 21 towards the locking position or the release position.

[0037] As shown in Figure 2 and Figure 3 In some embodiments of the utility model, the locking mechanism 2 further includes a second nut 22 and a limiting assembly 23, the second nut 22 is embedded in the fixed seat 1 and is threadedly connected with the fixed seat 1, the fixed rod 21 passes through the second nut 22 along the axis of the second nut 22, the outside of the fixed rod 21 is sleeved with a spring 24, the top end of the spring 24 abuts against the bottom surface of the second nut 22, the bottom end of the spring 24 is fixedly connected to the fixed rod 21, and the spring 24 is configured to be capable of applying elastic force to the fixed rod 21 towards the one-way bearing 3; the limiting assembly 23 is configured to be capable of locking the fixed rod 21 at the locking position or the release position.

[0038] Specifically, when the fixed rod 21 is located at the locking position, the spring 24 outside the fixed rod 21 biases the fixed rod 21 towards the one-way bearing 3 based on the elastic force thereof. When the fixed rod 21 releases the fixing of the outer ring 31 of the one-way bearing 3, the fixed rod 21 is manually pulled towards the direction away from the one-way bearing 3, the spring 24 enters the compressed state, and after the fixed rod 21 releases the fixing of the outer ring 31 of the one-way bearing 3, the fixed rod 21 is fixed at the release position by the limiting assembly 23 and the spring 24 is kept in the compressed state.

[0039] It should be noted that when the fixed rod 21 is located at the locking position, the spring 24 is compressed and exerts a pressure on the outer ring 31 of the one-way bearing 3, which is large enough to stably fix the outer ring 31 of the one-way bearing 3. Those skilled in the art can select a spring 24 with appropriate performance according to needs, which is not limited in the utility model.

[0040] In some embodiments of the utility model, the limiting assembly 23 includes a clamping ring 231 and a rotating head 232, the clamping ring 231 is fixedly installed on the side of the second nut 22 away from the one-way bearing 3, and the fixed rod 21 passes through the clamping ring 231; the side of the clamping ring 231 away from the one-way bearing 3 is provided with two first clamping grooves 2311, and the two first clamping grooves 2311 are distributed opposite in the radial direction of the clamping ring 231; the rotating head 232 is fixedly connected with the end of the fixed rod 21 away from the one-way bearing 3, the side of the rotating head 232 towards the one-way bearing 3 is provided with two insertion blocks 2321, and the two insertion blocks 2321 are distributed opposite in the radial direction of the clamping ring 231; when the two insertion blocks 2321 are respectively inserted into the two first clamping grooves 2311, the fixed rod 21 is locked at the release position; when the bottom surfaces of the two insertion blocks 2321 abut against the side of the clamping ring 231 away from the one-way bearing 3, the fixed rod 21 is locked at the locking position.

[0041] Specifically, when the fixing rod 21 is in the locking position, the two insertion blocks 2321 of the rotating head 232 are inserted into the two first clamping grooves 2311 of the clamping ring 231 one by one, the fixing rod 21 is biased towards the one-way bearing 3 under the elastic force of the spring 24, so as to fix the outer ring 31 of the one-way bearing 3. When it is needed to release the fixing of the outer ring 31 of the one-way bearing 3, the insertion blocks 2321 of the rotating head 232 are manually pulled out of the first clamping grooves 2311, and the rotating head 232 is rotated by a certain angle, so that the bottom surface of the insertion block 2321 abuts against the top surface of the clamping ring 231, thereby enabling the fixing rod 21 to move away from the one-way bearing 3 and enter the releasing position. In addition, when the fixing rod 21 enters the locking position again from the releasing position, since the spring 24 has a tendency to restore to the natural stretching state, the insertion blocks 2321 can be quickly clamped into the first clamping grooves 2311.

[0042] In some embodiments of the utility model, the outer ring 31 of the one-way bearing 3 is provided with a plurality of fixing holes 311 distributed at intervals along the peripheral portion thereof; when the fixing rod 21 is in the locking position, the fixing rod 21 is inserted into one of the fixing holes 311 to fix the outer ring 31 of the one-way bearing 3; when the fixing rod 21 is in the releasing position, the fixing rod 21 is separated from the fixing hole 311 to allow the outer ring 31 of the one-way bearing 3 to rotate relative to the fixing seat 1.

[0043] Specifically, the fixing rod 21 can be inserted into any one of the fixing holes 311 to lock the outer ring 31 of the one-way bearing 3; when the fixing rod 21 is separated from the fixing hole 311 and enters the releasing position, the fixing of the outer ring 31 of the one-way bearing 3 is released, and the transmission shaft 6 can rotate bidirectionally. When the fixing rod 21 needs to move from the releasing position to the locking position, the worker can rotate the transmission shaft 6, so that the outer ring 31 of the one-way bearing 3 rotates, thereby enabling one of the fixing holes 311 to be coaxial with the fixing rod 21, so as to facilitate the insertion of the fixing rod 21 into the fixing hole 311.

[0044] In some embodiments of the utility model, in order to make the time of rotating the transmission shaft 6 to find the fixing hole 311 shortest when locking the outer ring 31 of the one-way bearing 3, all the fixing holes 311 are uniformly distributed on the peripheral portion of the outer ring 31 of the one-way bearing 3.

[0045] In some embodiments of the utility model, the transmission shaft arresting device further comprises a torque arm 7 and a connecting piece 71, one end of the torque arm 7 is connected with the fixing seat 1 through the connecting piece 71, and the other end of the torque arm 7 is connected to the rack of the belt conveyor.

[0046] Specifically, in order to make the fixing seat 1 more stably fixed to the rack of the belt conveyor, the fixing seat 1 is connected to the rack of the belt conveyor through the torque arm 7. At the same time, the radial distance between the inner wall of the fixing seat 1 and the outer peripheral portion of the outer ring 31 of the one-way bearing 3 is uniform.

[0047] The utility model discloses a conveying device on the other side provides a kind of, the conveying device includes belt conveyor and the transmission shaft backstop device in above-mentioned embodiment, the inner ring 32 of one-way bearing 3 is fixedly sleeved in the transmission shaft 6 of the driving motor of belt conveyor, fixed seat 1 is connected to the rack of belt conveyor.

[0048] Specifically, the belt conveyor equipped with the transmission shaft backstop device of the utility model can move unidirectionally when running, and can realize bidirectional rotation of its transmission shaft 6 when overhauling.

[0049] The preferred embodiments of the utility model are described in detail above, but the utility model is not limited to the specific details in the above-mentioned embodiments, and various simple modifications can be made to the technical solutions of the utility model within the technical concept of the utility model, and these simple modifications all belong to the protection scope of the utility model.

[0050] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the utility model will not further describe various possible combination modes.

[0051] Furthermore, various different embodiments of the utility model can also be combined arbitrarily, as long as it does not deviate from the idea of the utility model, and it should be considered as disclosed by the utility model.

Claims

1. A drive shaft backstop device characterized by, The device comprises a fixed seat (1), a locking mechanism (2) and a one-way bearing (3), The inner ring (32) of the one-way bearing (3) is in interference fit with the drive shaft (6) of the belt conveyor, and the outer ring (31) of the one-way bearing (3) is spaced apart from the fixed seat (1) and can rotate relative to the fixed seat (1), and the fixed seat (1) is used for connecting to the frame of the belt conveyor; The locking mechanism (2) is installed on the fixed seat (1) and can move between a locking position and a release position; when the locking mechanism (2) is in the locking position, the locking mechanism (2) is connected with the outer ring (31) of the one-way bearing (3) to fix the outer ring (31) of the one-way bearing (3); when the locking mechanism (2) is in the release position, the locking mechanism (2) is disconnected with the outer ring (31) of the one-way bearing (3) to allow the outer ring (31) of the one-way bearing (3) to rotate relative to the fixed seat (1).

2. The driveshaft backstop of claim 1, wherein The fixed seat (1) circumferentially surrounds the one-way bearing (3), and the outer ring (31) of the one-way bearing (3) is in clearance fit with the fixed seat (1).

3. The driveshaft backstop of claim 1, wherein, The locking mechanism (2) comprises a fixed rod (21), the fixed rod (21) is provided through the fixed seat (1) along the radial direction of the one-way bearing (3), and the fixed rod (21) can move between a locking position and a release position; When the fixed rod (21) is in the locking position, the fixed rod (21) is connected with the outer ring (31) of the one-way bearing (3) to fix the outer ring (31) of the one-way bearing (3); when the fixed rod (21) is in the release position, the locking mechanism (2) is disconnected with the outer ring (31) of the one-way bearing (3) to allow the outer ring (31) of the one-way bearing (3) to rotate relative to the fixed seat (1).

4. The driveshaft backstop of claim 3, wherein The locking mechanism (2) comprises a first nut, the first nut is fixedly embedded in the fixed seat (1), the fixed rod (21) passes through the first nut and is threadedly connected with the first nut, so that the fixed rod (21) can be moved between the locking position and the release position by being screwed.

5. The driveshaft backstop of claim 3, wherein, The locking mechanism (2) further comprises a second nut (22) and a limiting assembly (23), the second nut (22) is embedded in the fixed seat (1) and is threadedly connected with the fixed seat (1), the fixed rod (21) moves along the axis of the second nut (22) and passes through the second nut (22), the outer portion of the fixed rod (21) is sleeved with a spring (24), the top end of the spring (24) abuts against the bottom surface of the second nut (22), the bottom end of the spring (24) is fixedly connected with the fixed rod (21), and the spring (24) is configured to apply a spring force to the fixed rod (21) towards the one-way bearing (3); The limiting assembly (23) is configured to lock the fixed rod (21) in the locking position or the release position.

6. The driveshaft backstop of claim 5, wherein, The limiting assembly (23) comprises a clamping ring (231) and a rotating head (232), the clamping ring (231) is fixedly installed on the side of the second nut (22) away from the one-way bearing (3), and the fixed rod (21) passes through the clamping ring (231) movably; the side of the clamping ring (231) away from the one-way bearing (3) is provided with two first clamping grooves (2311), and the two first clamping grooves (2311) are distributed in the diametrically opposite positions of the clamping ring (231); The rotating head (232) is fixedly connected with the end of the fixed rod (21) away from the one-way bearing (3), and the side of the rotating head (232) facing the one-way bearing (3) is provided with two insertion blocks (2321), and the two insertion blocks (2321) are distributed in the diametrically opposite positions of the clamping ring (231); When the two insertion blocks (2321) are inserted into the two first clamping grooves (2311) respectively, the fixed rod (21) is locked in the unlocking position; when the bottom surfaces of the two insertion blocks (2321) abut against the side of the clamping ring (231) away from the one-way bearing (3), the fixed rod (21) is locked in the locking position.

7. The driveshaft backstop of claim 3, wherein The outer ring (31) of the one-way bearing (3) is provided with a plurality of fixing holes (311) distributed at intervals along the circumferential portion thereof; When the fixed rod (21) is in the locking position, the fixed rod (21) is inserted into one of the fixing holes (311) to fix the outer ring (31) of the one-way bearing (3); when the fixed rod (21) is in the unlocking position, the fixed rod (21) is separated from the fixing hole (311) to allow the outer ring (31) of the one-way bearing (3) to rotate relative to the fixed seat (1).

8. The driveshaft backstop of claim 7, wherein, All the fixing holes (311) are uniformly distributed on the circumferential portion of the outer ring (31) of the one-way bearing (3).

9. The driveshaft backstop of claim 1, wherein, The transmission shaft reverse stopping device further comprises a torque arm (7) and a connecting piece (71), one end of the torque arm (7) is connected with the fixed seat (1) through the connecting piece (71), and the other end of the torque arm (7) is connected to the rack of the belt conveyor.

10. A delivery device characterized by, The belt conveyor and the transmission shaft reverse stopping device according to any one of claims 1-9 are comprised, the inner ring (32) of the one-way bearing (3) is fixedly sleeved on the transmission shaft (6) of the driving motor of the belt conveyor, and the fixed seat (1) is connected to the rack of the belt conveyor.

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