Single-layer roller type conveying line and single-layer roller type RGV conveying trolley

By using a double-row roller conveyor structure and a single motor + drive shaft power input method, combined with photoelectric sensors, the problem of traditional roller conveyor lines being unable to transport large-sized, heavy battery packs has been solved. This has enabled efficient and synchronous transport of battery packs, reducing the risk of tipping over and production and maintenance costs.

CN223591599UActive Publication Date: 2025-11-25马鞍山南实科技有限公司
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Patent Information

Application Number
CN202423097813.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2025-11-25
Estimated Expiration
2034-12-16

AI Technical Summary

Technical Problem

In the existing technology, traditional roller conveyor lines cannot effectively transport large and heavy battery packs, and the insufficient conveying power results in low conveying efficiency.

Method used

It adopts a double-row roller conveyor structure and uses a single motor + drive shaft power input method, combined with photoelectric sensors and cargo detection photoelectric components, to realize the synchronous transportation of large-size and heavy battery packs.

Benefits of technology

It enables efficient transport of large-size and heavy battery packs, expands the transport range, improves transport synchronization and load capacity, reduces the risk of tipping over, and has lower production and maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a single-layer roller type conveying line which comprises a power assembly, a left conveying assembly and a right conveying assembly, the left conveying assembly and the right conveying assembly are identical, and the power assembly is located on the lower portions of the conveying assemblies and connected with the left conveying assembly and the right conveying assembly. The power assembly comprises a driving chain wheel shaft, a gear motor, a motor mounting plate, left and right bearing seats, a plurality of chain wheels and a plurality of chains; the left and right bearing seats are positioned between the left and right conveying assemblies; the left and right ends of the driving chain wheel shaft are matched with bearings in the bearing seats and then extend out to be positioned below the two conveying assemblies respectively; the end, close to the gear motor, of the driving chain wheel shaft is provided with a left chain wheel and a right chain wheel, and the end away from the gear motor is provided with a chain wheel. A chain wheel on an output shaft of the gear motor is connected with one chain wheel of the driving chain wheel shaft through a chain, and the other two chain wheels on the driving chain wheel shaft are respectively connected with one conveying assembly through chains. According to the utility model, the conveying of the battery PACK with large size and heavy weight can be realized.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a single -layer roller formula conveying line and RGV transport dolly when square lithium cell PACK package transfer. BACKGROUND

[0002] With the continuous renewal development of new energy automobile industry, the time demand of vehicle endurance is also longer and longer. In order to meet the promotion of endurance, it is necessary to promote the battery capacity of the core component-PACK package of new energy automobile. At present, one of the methods of this promotion is to increase the space of PACK package to fill more battery cells, and the weight of PACK is also increased.

[0003] The traditional battery PACK package is conveyed by adopting fork form to take material, and the transmission efficiency is low, so the roller conveying mode emerges. However, the structure of the current roller conveying is a single conveying assembly, the length of the roller is short, and the transmission power is small. For the battery PACK package with large space and heavy weight, it cannot adapt to large size transmission and cannot guarantee the transmission power. At present, a transport dolly capable of conveying large size and heavy weight battery PACK package is urgently needed. SUMMARY

[0004] The utility model wants to solve the problem to provide a single -layer roller formula conveying line, it can realize the conveying of large size and heavy weight battery PACK package, and further improve its compatibility. Meanwhile, the utility model provides a single -layer roller formula RGV conveying dolly.

[0005] The utility model discloses a single -layer roller formula conveying line, it includes power component, left and right two same conveying assembly, and power component is located in the lower part of conveying assembly and is connected with left and right conveying assembly;Power component includes driving sprocket shaft, speed reducer motor, motor mounting plate, left and right bearing seat, a plurality of chain wheels, a plurality of chains;Motor mounting plate is located in the lower part of one conveying assembly, and speed reducer motor is fixed on the upper surface of motor mounting plate;Left and right bearing seat is located in the middle of left and right two conveying assemblies, and the left and right ends of driving sprocket shaft are matched with the bearing in bearing seat and then stretch out and are located below two conveying assemblies respectively;The end close to speed reducer motor of driving sprocket shaft is equipped with left and right two chain wheels, and the end away from speed reducer motor is equipped with a chain wheel;The chain wheel on the output shaft of speed reducer motor is connected with one chain wheel on driving sprocket shaft through chain, and the other two chain wheels on driving sprocket shaft are connected with one conveying assembly through chain respectively.

[0006] Further, each conveying assembly comprises two side plates, four roller line branches arranged in a rectangle, a double-head double-chain roller, a plurality of single-head double-chain rollers, and a plurality of chains; the front and rear ends of the two side plates are fixed on the upper end faces of the front and rear roller line branches respectively, the two ends of each roller are connected with bearings in the holes of the left and right side plates, the double-head double-chain roller is lower than the single-head double-chain rollers, the chain wheel part at one end of the double-head double-chain roller is connected with the chain wheel part on the driving sprocket shaft through a chain, and the chain wheel part at the other end is connected with one chain wheel part on the single-head double-chain roller above through a chain, and the chain wheel parts between adjacent single-head double-chain rollers are connected through chains.

[0007] Further, each conveying assembly further comprises two front and rear connecting plates, front and rear electric stops, and front and rear baffle plates, one connecting plate is fixed on the lower surface of the front end and the rear end of each side plate, the electric stop is fixed on the lower surface of the connecting plate, and the rod end of the electric stop extends out of the connecting plate and is connected with the baffle plate.

[0008] Further, each conveying assembly further comprises a guide, and the guide is fixed on the upper end face of the outer side plate.

[0009] Further, the roller conveying line further comprises at least two groups of photoelectric assemblies, each group of photoelectric assemblies comprises two photoelectric supports and a pair of photoelectric sensors, the two photoelectric supports are fixed symmetrically on the upper surfaces of the left and right guides, and the pair of photoelectric sensors are fixed on the upper parts of the two photoelectric supports.

[0010] Further, the roller conveying line further comprises two groups of goods detection photoelectric assemblies, each group of goods detection photoelectric assembly comprises a goods detection photoelectric and a goods detection photoelectric support, and the goods detection photoelectric support is fixed on the upper surfaces of the left and right guides, and the goods detection photoelectric is fixed on the upper part of the goods detection photoelectric support.

[0011] Further, the power assembly further comprises a motor pressing block and two oil receiving discs, and the motor pressing block is in contact with and connected to one end of the motor mounting plate; the oil receiving discs are located below the chain wheels on the driving sprocket shaft.

[0012] Further, each conveying assembly further comprises two left and right sealing plates, and the sealing plates are fixedly installed on the outer surfaces of the side plates.

[0013] The utility model discloses a single-layer roller type RGV transport trolley, it includes walking assembly, ranging communication box subassembly, electrical box subassembly, single-layer roller type conveying line, single-layer roller type conveying line is fixed in the middle part of walking assembly, ranging communication box subassembly and electrical box subassembly are fixed at the both ends of walking assembly respectively, and the roller conveying direction of single-layer roller type conveying line is perpendicular with the walking direction of walking assembly.

[0014] Further, the walking assembly comprises a driving wheel assembly, a frame, a walking motor mounting plate, a band brake reduction motor, a chain wheel, a chain, and at least one driven wheel assembly; the driving wheel assembly and the driven wheel assembly are fixedly connected with the frame, the band brake reduction motor is fixed on the upper end face of the frame through the walking motor mounting plate, the chain wheel is installed on the shaft end of the band brake reduction motor, and the driving wheel assembly is connected with the chain wheel through the chain; the roller cylinder line branch leg, the motor mounting plate, the motor pressing block, the bearing seat, and the oil receiving disc are all fixed on the upper face of the frame.

[0015] The single-layer roller cylinder type conveying line and the RGV transport trolley have the following advantages: 1. Two groups of transport assemblies, i.e., the double-row roller cylinder line structure, effectively avoids the problem that the single-row roller cylinder line cannot convey large-size battery PACK packages due to insufficient roller cylinder length; 2. The roller cylinder used in the double-row roller cylinder line can be selected to be shorter in size, effectively improves the conveying load of the roller cylinder line, and meets the conveying of large-size and heavy-weight battery PACK packages; and 3. The power input form of a single motor + transmission shaft is adopted to ensure the synchronization of the conveying of the two rows of roller cylinder lines. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the single-layer roller cylinder type conveying line.

[0017] Figure 2 is a front view of the single-layer roller cylinder type conveying line.

[0018] Figure 3 is Figure 2 a left view.

[0019] Figure 4 is a perspective view of the single-layer roller cylinder type RGV transport trolley. Figure 1 .

[0020] Figure 5 is a perspective view of the single-layer roller cylinder type RGV transport trolley (with the front shield plate removed). Figure 2

[0021] Figure 6 is a perspective view of the walking assembly.

[0022] Figure 7 is a walking schematic view of the RGV transport trolley on a track. DETAILED DESCRIPTION

[0023] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0024] Embodiment 1

[0025] From Figure 1 , Figure 2 , Figure 3 ​The utility model discloses a single layer roller cylinder formula conveying line 4, it includes power component, left and right two same conveying assembly, and power component is located the lower part of conveying assembly and is connected with left and right conveying assembly, power component includes driving sprocket shaft 408, speed reducer motor 413, motor mounting plate 414, left and right bearing seat 420, a plurality of chain wheels 419, a plurality of chains 417, motor mounting plate 414 is located the lower part of one conveying assembly, and speed reducer motor 413 is fixed on the top of motor mounting plate 414, left and right bearing seat 420 is located the middle of left and right two conveying assemblies, and the left and right ends of driving sprocket shaft 408 are stretched out respectively after being matched with the bearing in bearing seat 420 and are located the lower surface of two conveying assemblies, and the end of driving sprocket shaft 408 close to speed reducer motor 413 is equipped with left and right two chain wheels 419, and the end away from speed reducer motor 413 is equipped with a chain wheel 419, and the chain wheel 419 on the output shaft of speed reducer motor 413 is connected with one chain wheel 419 on driving sprocket shaft 408 through chain 417, and the other two chain wheels 419 on driving sprocket shaft 408 are connected with one conveying assembly through chain 417 respectively.

[0026] The utility model discloses single layer roller cylinder formula conveying line's working principle: speed reducer motor 413 works, and its output shaft drives driving sprocket shaft 408 to rotate through chain wheel 419, chain 417, and the both ends of driving sprocket shaft 408 transmit power to left and right two conveying assemblies through chain wheel 419, chain 417, realize the conveying of battery PACK bag.

[0027] The utility model discloses single layer roller cylinder formula conveying line's advantage is: one, left and right two conveying assemblies expand the width of conveying, can realize the conveying of big size battery PACK bag, two, left and right two conveying assemblies rotate simultaneously and improve the carrying capacity, can realize the conveying of heavy weight battery PACK bag, three, single motor+ transmission shaft power input form, guarantee left and right two sets of conveying assembly's conveying synchronism, therefore, the utility model discloses single layer roller cylinder formula conveying line realizes the conveying of big size, heavy weight battery ACK bag, and of course small size light weight battery PACK bag can also be conveyed, therefore expands the conveying range.

[0028] Example 2

[0029] From Figure 1 , Figure 2 , Figure 3It can be known that the single-layer roller type conveying line: each conveying assembly comprises left and right two side plates 403, four roller line legs 407 arranged in a rectangular shape, double-head double-chain rollers 418, multiple single-head double-chain rollers 416 and multiple chains 417; the front and rear ends of the two side plates 403 are fixed on the upper end faces of the front and rear two roller line legs 407 respectively, the two ends of each roller are connected with bearings in the holes of the left and right side plates 403, the double-head double-chain rollers 418 are lower than the single-head double-chain rollers 416, the chain wheel part at one end of the double-head double-chain rollers 418 is connected with the chain wheel part on the driving sprocket shaft 408 through the chain 417, and the chain wheel part at the other end is connected with one chain wheel part on the single-head double-chain roller 416 above through the chain 417, and the chain wheel parts between the adjacent single-head double-chain rollers 416 are connected through the chains 417.

[0030] The driving sprocket shaft 408 drives the double-head double-chain rollers 418 to rotate through the sprocket 419 and the chain 417, the double-head double-chain rollers 418 drive one single-head double-chain roller 416 at each end through the chain 417 respectively, each single-head double-chain roller 416 drives all the single-head double-chain rollers 416 on the conveying assembly through the chain 417, so that the conveying of the battery PACK package is realized.

[0031] The single-layer roller type conveying line has the following advantages: 1, the power input form of single motor + transmission shaft ensures the synchronization of the left and right two roller line conveyors; 2, the structure form of double-row roller line effectively avoids the problem that the single-row roller line cannot convey large-size battery PACK due to insufficient roller length; 3, the roller used by the double-row roller line can be selected to be shorter in size, so that the conveying load of the roller line is effectively improved, and the conveying of large-size and high-weight battery PACK is met.

[0032] Example 3

[0033] From Figure 1 , Figure 2 , Figure 3 It can be known that the single-layer roller type conveying line: each conveying assembly further comprises front and rear two connecting plates 404, front and rear electric stoppers 401 and front and rear baffles 406, and each of the lower surfaces of the front and rear ends of the left and right two side plates 403 is fixed with a connecting plate 404, the electric stopper 401 is fixed on the lower surface of the connecting plate 404, and the rod end of the electric stopper 401 extends out of the connecting plate 404 and is connected with the baffle 406.

[0034] The specific position of the battery PACK on the single-head double-chain roller 416 is determined through the baffle 406, and the battery PACK is prevented from falling off the roller during walking.

[0035] Example 4

[0036] From Figure 1 , Figure 2 ,Figure 3 It can be known that the single-layer roller type conveying line comprises a roller conveying line 4, a power assembly, a single-head double-chain roller 416, a battery PARK package, a conveying assembly, a guide piece 402 and a motor 413.

[0037] When the battery PARK package is conveyed on the single-head double-chain roller 416, the left and right two guide pieces 402 play a guiding role on the battery PARK package.

[0038] Embodiment 5

[0039] From Figure 1 , Figure 2 , Figure 3 It can be known that the single-layer roller type conveying line comprises a roller conveying line 4, a power assembly, a single-head double-chain roller 416, a battery PARK package, a conveying assembly, a guide piece 402 and a motor 413.

[0040] The photoelectric assembly senses the position of the battery PARK package on the single-head double-chain roller 416, controls the conveying and stopping of the battery PARK package on the roller.

[0041] Embodiment 6

[0042] From Figure 1 , Figure 2 , Figure 3 It can be known that the single-layer roller type conveying line comprises a roller conveying line 4, a power assembly, a single-head double-chain roller 416, a battery PARK package, a conveying assembly, a guide piece 402 and a motor 413.

[0043] The probe photoelectric assembly detects whether the battery PARK package exists on the station connected with the single-layer roller type conveying line and feeds back a signal, so as to ensure the accuracy of the RGV conveying trolley connection position and detect and verify the accuracy of the connection interactive information.

[0044] Embodiment 7

[0045] From Figure 1 , Figure 2 , Figure 3 It can be known that the single-layer roller type conveying line comprises a roller conveying line 4, a power assembly, a single-head double-chain roller 416, a battery PARK package, a conveying assembly, a guide piece 402 and a motor 413.

[0046] The motor pressing block 415 limits the motor mounting plate 414, so as to ensure the reliability of the positioning of the speed reducer motor 413; and the oil receiving disc 411 receives oil.

[0047] Embodiment 8

[0048] From Figure 1 , Figure 2 , Figure 3 It is known that the single-layer roller type conveying line: each conveying assembly further comprises left and right two sealing plates 405, and the sealing plates 405 are fixedly installed on the outer side surface of the side plate 403.

[0049] The sealing plates 405 protect the bearings in the side plate 403, thereby prolonging the service life of the conveying line.

[0050] Embodiment 9

[0051] From Figure 4 , Figure 5 It is known that the single-layer roller type RGV trolley comprises a walking assembly 1, a distance measuring communication box assembly 2, an electrical box assembly 3 and a single-layer roller type conveying line 4; the single-layer roller type conveying line 4 is fixed at the middle part of the walking assembly 1, the distance measuring communication box assembly 2 and the electrical box assembly 3 are respectively fixed at both ends of the walking assembly 1, and the roller conveying direction of the single-layer roller type conveying line 4 is perpendicular to the walking direction of the walking assembly 1.

[0052] The walking assembly 1 drives the single-layer roller type conveying line 4 to a specified position, and then the single-layer roller type conveying line 4 moves the battery PARK package on the roller to a work station or moves the battery PARK package on the work station to the roller.

[0053] Among them, the single-layer roller type RGV trolley further comprises a front shield plate 5 and a top shield plate, which play a protective role on the conveying line.

[0054] Embodiment 10

[0055] From Figure 5 , Figure 6 It is known that the single-layer roller type RGV trolley comprises a walking assembly 1, a distance measuring communication box assembly 2, an electrical box assembly 3 and a single-layer roller type conveying line 4; the single-layer roller type conveying line 4 is fixed at the middle part of the walking assembly 1, the distance measuring communication box assembly 2 and the electrical box assembly 3 are respectively fixed at both ends of the walking assembly 1, and the roller conveying direction of the single-layer roller type conveying line 4 is perpendicular to the walking direction of the walking assembly 1.

[0056] The single-layer roller type conveying line 4 is connected with the walking assembly 1 through the roller line branch 407, the motor mounting plate 414, the motor pressing block 415, the bearing seat 420 and the oil receiving disc 411. When the holding brake deceleration motor 109 works, the driving wheel is driven to move through the chain wheel 113 and the chain 114, and then the driven wheel is driven to move, so that the walking assembly 1 drives the whole single-layer roller type RGV trolley to walk.

[0057] Embodiment 11

[0058] From Figure 6 It can be known that the single-layer roller type RGV trolley of the utility model: the walking assembly 1 further includes a wheel cover 110 and a wheel cover cover plate 111, the wheel cover 110 is installed on the upper end face of the frame 105 and is sleeved on the outside of the bearing seat, and the wheel cover cover plate 111 is installed on the top opening position of the wheel cover 110.

[0059] The wheel cover 110 and the wheel cover cover plate 111 constitute a protection mechanism of the bearing seat in the driving wheel assembly 101 and the driven wheel assembly 102.

[0060] Embodiment 12

[0061] From Figure 6 , Figure 7 It can be known that the single-layer roller type RGV trolley of the utility model: the walking assembly 1 further includes an auxiliary wheel assembly 103, and the auxiliary wheel assembly 103 is fixed on the lower end face of the frame 105.

[0062] From Figure 7 It can be known that the track is in the shape of an I-beam, the driving wheel and the driven wheel walk on the upper surface of the upper cross beam, and the auxiliary wheel assembly 103 contacts the two side surfaces of the vertical beam, so that the walking assembly 1 is prevented from deviating from the walking track when moving.

[0063] Embodiment 13

[0064] From Figure 6 It can be known that the single-layer roller type RGV trolley of the utility model: the walking assembly 1 further includes a limiting follower assembly 104, and the limiting follower assembly 104 is fixedly installed on the lower end face of the frame 105.

[0065] From Figure 7 It can be known that when the track is warped, the limiting follower assembly 104 prevents the walking assembly 1 from bumping when moving, and simultaneously protects the auxiliary wheel assembly 103.

[0066] Embodiment 14

[0067] From Figure 6 It can be known that the single-layer roller type RGV trolley of the utility model: the walking assembly 1 further includes a motor pressing block 107, and the motor pressing block 107 is installed on the upper end face of the frame 105 and is fixedly connected with the end face of the walking motor mounting plate 106.

[0068] The motor pressing block 107 fixes the position of the walking motor mounting plate 106, ensures the position of the brake clutch deceleration motor 109, and further ensures the tension of the chain 114 of the walking assembly 1 during operation.

[0069] Embodiment 15

[0070] From Figure 6 It can be known that the single-layer roller type RGV trolley of the utility model: the walking assembly 1 further includes a row brush 108, and the row brush 108 is fixedly installed on the two end faces of the walking direction of the frame 105.

[0071] The row brush 108 plays a role in cleaning the surface of the track during the operation of the walking assembly 1, avoids the influence of sundries on the surface of the track on the running of the trolley and the damage to the surface quality of the driving and driven wheels.

[0072] The working process of the single-layer roller type RGV trolley of the utility model is as follows: when there is a battery PACK package that needs to be transferred on the docking platform or the electrical measurement platform, the control system will give the RGV trolley a material picking instruction, the RGV trolley travels along the existing track line to the docking platform or the electrical measurement platform position where the PACK package needs to be picked up, the goods detection photoelectric 422 judges whether there is a PACK package at the pickup point, and if there is a PACK package, the pickup material information is interacted with the pickup point; when the PACK package moves to the feeding end of the roller conveying line 4, the material is sensed by the opposite type photoelectric sensor 421 and a feedback signal is given, the deceleration motor 413 is started, the power is transmitted to the two side lines through the driving sprocket shaft 408, and the single-head double-chain iron seat roller 416 rotates to pick up the PACK package; when the PACK package is transported on the roller conveying line 4 to the second group of opposite type photoelectric sensors 421, the opposite type photoelectric sensor 421 senses the material and feeds back a signal, the electric stop 401 makes the baffle 406 rise, and the deceleration motor 413 stops working, and the roller conveying action ends. The RGV trolley carries the PACK package to the offline work station, and the offline action of the PACK package is carried out according to the above action process.

[0073] The single-layer roller type conveying line and the RGV transport trolley have the following advantages: 1. Two groups of transport assemblies, i.e., the structure of double-row roller lines, effectively avoid the problem that the single-row roller line cannot transport large-size battery PACK due to insufficient roller length; 2. The rollers used in the double-row roller line can be selected to be shorter in size, effectively improving the conveying load of the roller line and meeting the conveying of large-size and heavy battery PACK; 3. The power input form of single motor + transmission shaft is adopted to ensure the synchronization of the two-row roller line conveying; 4. Compared with the telescopic fork structure form, the roller conveying form has higher load capacity and greatly reduces the risk of side overturning; 5. The single-layer roller type RGV transport trolley travels along the track to the connection platform or the electrical measurement platform position for taking the PACK battery package, and the cargo photoelectricity is used to determine whether the PACK battery package exists at the taking point; when the PACK package moves to the feeding end of the roller conveying line, the material is sensed by the photoelectric sensor and a feedback signal is given, the speed reducer is started, power is transmitted to the two sides of the line body through the driving sprocket shaft, the single-head double-chain iron seat roller rotates to take the PACK package; when the PACK package is transported on the roller conveying line to the second group of photoelectric sensors, the photoelectric sensor senses the material and feeds back a signal, the electric stop works to make the baffle rise, and the speed reducer stops working, and the roller conveying action ends. The RGV transport trolley carries the PACK package to the offline work position, and the offline action of the PACK package is performed according to the above action process.

[0074] The utility model can realize the conveying of large and heavy PACK battery package products, realize the compatibility with small and light products, and the roller conveying type has lower manufacturing and production maintenance cost. Meanwhile, the RGV trolley system of the utility model is not an independent running mechanism unit, and it and the connection platform, the electrical measurement platform and the like form a complete PACK transfer and electrical measurement system.

Claims

1. A single-layer roller conveyor line, characterized in that: It includes a power assembly and two identical left and right conveying assemblies. The power assembly is located below the conveying assemblies and connected to them. The power assembly includes a drive sprocket shaft (408), a geared motor (413), a motor mounting plate (414), left and right bearing seats (420), multiple sprockets (419), and multiple chains (417). The motor mounting plate (414) is located below one of the conveying assemblies, and the geared motor (413) is fixed on the motor mounting plate (414). The left and right bearing seats (420) are located in the middle of the two conveying assemblies, and the left and right bearing seats (420) are located between the drive sprocket shaft (408). After the bearings at both ends are engaged with the bearing housing (420), they extend out and are located below the two conveying components respectively; the end of the drive sprocket shaft (408) that is close to the geared motor (413) is provided with two sprockets (419) on the left and right, and the end that is far away from the geared motor (413) is provided with one sprocket (419); the sprocket (419) on the output shaft of the geared motor (413) is connected to one sprocket (419) on the drive sprocket shaft (408) by a chain (417), and the other two sprockets (419) on the drive sprocket shaft (408) are connected to a conveying component by a chain (417) respectively.

2. The single-layer roller conveyor line according to claim 1, characterized in that: Each conveying assembly includes two side plates (403), four rectangular roller support legs (407), a double-headed double-chain roller (418), multiple single-headed double-chain rollers (416), and multiple chains (417). The front and rear ends of the two side plates (403) are respectively fixed to the upper surfaces of the front and rear roller support legs (407). The two ends of each roller are connected to the bearings in the holes of the left and right side plates (403). The double-headed double-chain roller (418) is lower than the single-headed double-chain roller (416). The sprocket part at one end of the double-headed double-chain roller (418) is connected to the sprocket part on the drive sprocket shaft (408) through the chain (417), and the sprocket part at the other end is connected to a sprocket part on the single-headed double-chain roller (416) above it through the chain (417). The sprocket parts between adjacent single-headed double-chain rollers (416) are connected through the chain (417).

3. The single-layer roller conveyor line according to claim 2, characterized in that: Each conveying assembly also includes two connecting plates (404) at the front and rear, a front and rear electric stop (401), and a front and rear baffle (406). A connecting plate (404) is fixed under the front and rear ends of the two side plates (403). The electric stop (401) is fixed under the connecting plate (404), and its rod end extends out of the connecting plate (404) and connects to the baffle (406).

4. The single-layer roller conveyor line according to claim 2, characterized in that: Each conveying assembly also includes a guide (402) which is fixed to the upper end face of the outer side plate (403).

5. The single-layer roller conveyor line according to claim 4, characterized in that: The roller conveyor line (4) also includes at least two sets of photoelectric components. Each set of photoelectric components includes two left and right photoelectric brackets (409) and a through-beam photoelectric sensor (421). The two photoelectric brackets (409) are symmetrically fixed on the top of the left and right guides (402), and the through-beam photoelectric sensor (421) is fixed on its upper part.

6. The single-layer roller conveyor line according to claim 4, characterized in that: The roller conveyor line (4) also includes two sets of cargo detection photoelectric components. Each set of cargo detection photoelectric components includes a cargo detection photoelectric component (422) and a cargo detection photoelectric component bracket (410). The cargo detection photoelectric component bracket (410) is fixed on the top of the left and right guide components (402), and the cargo detection photoelectric component (422) is fixed on its upper part.

7. The single-layer roller conveyor line according to claim 2, characterized in that: The power assembly also includes a motor clamping block (415) and two oil receiving pans (411). The motor clamping block (415) contacts and connects to one end of the motor mounting plate (414). The oil receiving pans (411) are located below the sprocket (419) on the drive sprocket shaft (408).

8. The single-layer roller conveyor line according to claim 2, characterized in that: Each conveying assembly also includes two sealing plates (405) on the left and right sides, which are fixedly installed on the outer side of the side plate (403).

9. A single-layer roller-type RGV transport trolley, characterized in that: It includes a walking assembly (1), a ranging communication box assembly (2), an electrical box assembly (3), and a single-layer roller conveyor line as described in any one of claims 1-8; the single-layer roller conveyor line is fixed in the middle part of the walking assembly (1), the ranging communication box assembly (2) and the electrical box assembly (3) are respectively fixed at both ends of the walking assembly (1), and the roller conveying direction of the single-layer roller conveyor line is perpendicular to the walking direction of the walking assembly (1).

10. The single-layer roller-type RGV transport trolley according to claim 9, characterized in that: The traveling assembly (1) includes a drive wheel assembly (101), a frame (105), a traveling motor mounting plate (106), a brake reduction motor (109), a sprocket (113), a chain (114), and at least one driven wheel assembly (102). The drive wheel assembly (101) and the driven wheel assembly (102) are fixedly connected to the frame (105). The brake reduction motor (109) is fixed to the upper surface of the frame (105) through the traveling motor mounting plate (106). The sprocket (113) is installed on the shaft end of the brake reduction motor (109). The drive wheel assembly and the sprocket (113) are connected through the chain (114). The roller line support leg (407), the motor mounting plate (414), the motor clamping block (415), the bearing seat (420), and the oil receiving pan (411) are all fixed on the top of the frame (105).