RGV trolley

Abstract

The utility model discloses an RGV trolley which comprises a frame, wheels are arranged at the bottom of the frame, at least four sets of wheels are arranged, each set of wheels comprises two wheels, the distance between at least two sets of wheels at the front end is S1, the distance between at least two sets of wheels at the rear end is S2, the distance between two sets of wheels at the middle section is S3, S3 is larger than S1, S3 is larger than S2, and S1 is larger than S2. And at least four groups of wheels are driven by a first servo motor. The number of the wheels of the RGV is increased to at least eight, the two sets of wheels at the front end are close to each other, the at least two sets of wheels at the rear end are close to each other, and the two sets of wheels in the middle are far away from each other, so that the RGV can stably cross the fracture position.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of RGV trolley. BACKGROUND

[0002] RGV trolley is used in the warehouse of various high-density storage mode, can improve the whole warehouse storage capacity, and does not need fork truck to drive into lane when operating, so that its safety will be higher. For example, for the storage and handling of mutual inductor, RGV trolley is used. However, the wheels of the current RGV trolley are all four, for the track with fracture, such as the track is opened in the two sides of sliding door, when opening sliding door, the track on both sides is connected, but the adjacent end of track will be fractured, the front group of front wheels of RGV trolley will be first stuck in fracture, even if the rear group of rear wheels is on the track, it will also be unable to drive forward because the front wheels are stuck, at this time, operating personnel need to manually lift the RGV trolley, so that the front and rear wheel groups are all on the track without fracture, to continue to move forward. SUMMARY

[0003] To overcome the above-mentioned shortcomings, the purpose of the utility model is a kind of RGV trolley suitable for fractured track.

[0004] In order to achieve the above purpose, one of the technical solutions adopted by the utility model is: a kind of RGV trolley, comprising a frame, the bottom of the frame is provided with wheels, the wheels are provided with at least four groups, each group of wheels comprises two wheels, the distance between at least two groups of wheels at the front end is S1, the distance between at least two groups of wheels at the rear end is S2, the distance between two groups of wheels in the middle section is S3, S3>S1, S3>S2, and the at least four groups of wheels are driven by a first servo motor.

[0005] The beneficial effects of the RGV trolley of the present application are that the four wheels of the RGV trolley are increased to at least eight, and the two groups of wheels at the front end are close, the at least two groups of wheels at the rear end are close, and the two groups of wheels in the middle are far apart. Through this structural arrangement, even if the RGV trolley drives to the fractured track, when the front wheels drive to the fracture of the track, because there are at least six wheels supporting behind, the two front wheels will not fall forward and be stuck in the fracture, and the several groups of wheels in the middle will not be stuck in the fracture of the track because of the support of the frontmost and last end wheel groups, and after the front several groups of wheels pass the fracture, the last group of wheels will also smoothly pass the fracture because of the support of at least three groups (six) of front wheels, and the present application can be suitable for driving on fractured track.

[0006] Preferably, a battery pack is arranged on the bottom of the frame, the battery pack is connected with the first servo motor, and a charging plug interface is arranged on the frame to charge the battery pack.

[0007] Preferably, S2 is equal to S1.

[0008] Preferably, each group of the wheels further comprises a first transmission shaft rotatably arranged at the bottom of the frame, and both ends of the first transmission shaft extend out of the frame and are fixedly connected with the two wheels;

[0009] The first synchronous pulleys are arranged on at least two first transmission shafts at the front end and at least two first transmission shafts at the rear end, and each adjacent two first synchronous pulleys are connected by a first synchronous belt;

[0010] The second synchronous pulleys are fixedly arranged on the adjacent two first transmission shafts in the middle section, and the two second synchronous pulleys are connected by a second synchronous belt;

[0011] One of the first transmission shafts in the middle section is fixedly arranged with a driving secondary synchronous pulley;

[0012] The first servo motor is fixedly arranged on the frame, and the output shaft end of the first servo motor is fixedly arranged with a driving synchronous pulley, and the driving synchronous pulley and the driving secondary synchronous pulley are connected by a main synchronous belt.

[0013] The first servo motor synchronously drives at least four groups of wheels, and can smoothly drive the RGV trolley to move.

[0014] Preferably, the top of the frame is provided with a speed-up chain assembly, and the speed-up chain assembly comprises:

[0015] Two speed-up chains for transmission, and a driven sprocket is rotatably arranged at each of the front and rear ends on both sides of the frame, and a speed-up chain is sleeved on each of the two driven sprockets on each side;

[0016] Two second transmission shafts, and the two driven sprockets at the front end and the two driven sprockets at the rear end are respectively connected by a second transmission shaft, one of the second transmission shafts is fixedly arranged on the frame, and the second transmission shaft and the driven sprockets at both ends thereof can relatively rotate; the other second transmission shaft is rotatably arranged on the frame, and both ends of the second transmission shaft are fixedly connected with the driven sprockets, and the second transmission shaft is fixedly arranged with a driving secondary sprocket;

[0017] A second servo motor is fixedly arranged on the frame, and the output shaft end of the second servo motor is fixedly arranged with a driving sprocket, and the driving sprocket and the driving secondary sprocket are arranged with a transmission chain therebetween.

[0018] Preferably, the speed-up chain assembly is provided with two groups and is arranged in an up-down distribution. Both the upper and lower layers can be used for conveying transformer products.

[0019] Preferably, the transmission directions of the two groups of speed-up chain assemblies are opposite.

[0020] Preferably, the front ends of the transmission directions of the two groups of the speed chain assembly are provided with baffle plates, the baffle plates are driven to rotate by the stepping motor, and the baffle plates can be rotated to be higher than the speed chain or lower than the speed chain. The baffle plates are arranged to prevent the transformer product from falling due to inertia in the case of sudden stop of the RGV trolley; the stepping motor is adopted to drive, the cost is low, the structure is compact, and more space of the trolley frame is not occupied.

[0021] Preferably, a positioning pin hole is arranged on the second transmission shaft fixed to the trolley frame, and a positioning pin is fixed to the trolley frame and passes through the positioning pin hole.

[0022] Preferably, guide wheels are arranged at the two ends of the second transmission shaft to guide the transformer product. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a perspective view of the top of the embodiment;

[0024] Figure 2 It is a plan view of the embodiment;

[0025] Figure 3 It is a perspective view of the bottom of the embodiment;

[0026] Figure 4 It is a bottom view of the embodiment.

[0027] In the drawing: 10, trolley frame; 20, trolley wheel; 21, first servo motor; 22, first transmission shaft; 23, first synchronous pulley; 24, first synchronous belt; 25, second synchronous pulley; 26, second synchronous belt; 27, driven secondary synchronous pulley; 28, driving synchronous pulley; 29, main synchronous belt; 30, speed chain assembly; 31, speed chain; 32, driven sprocket; 33, second transmission shaft; 34, driving secondary sprocket; 35, second servo motor; 36, driving sprocket; 37, guide wheel; 38, positioning pin; 40, baffle plate; 41, stepping motor. DETAILED DESCRIPTION

[0028] The preferred embodiments of the utility model are described in detail below with reference to the drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0029] Reference Figures 1 to 4As shown, the embodiment discloses an RGV trolley, which comprises a trolley frame 10, the bottom of the trolley frame 10 is provided with wheels 20, the wheels 20 are provided in at least four groups, each group of wheels 20 comprises two wheels 20, the wheels 20 of the embodiment are provided in four groups, i.e. eight wheels 20, wherein the distance between the two groups of wheels 20 at the front end is S1, the distance between the two groups of wheels 20 at the rear end is S2, and the distance between the two groups of wheels 20 at the middle section is S3, S3>S1, S3>S2, and the at least four groups of wheels 20 are driven by a first servo motor 21.

[0030] In some embodiments, S2 is equal to S1.

[0031] In some embodiments, S2 can be not equal to S1, S2>S1, or S2<S1.

[0032] The first servo motor 21 in the embodiment is powered by a battery pack (not shown in the figure), the battery pack is arranged on the bottom of the trolley frame 10, the battery pack is connected with the first servo motor 21, and a charging plug-in interface is arranged on the trolley frame 10, which is used to charge the battery pack.

[0033] Each group of wheels 20 in the embodiment further comprises a first transmission shaft 22, the first transmission shaft 22 is rotatably arranged on the bottom of the trolley frame 10 through a bearing, and the two ends of the first transmission shaft 22 protrude out of the trolley frame 10 and are connected and fixed with the two wheels 20.

[0034] The two first transmission shafts 22 at the front end and the two first transmission shafts 22 at the rear end are each provided with a first synchronous pulley 23, the first synchronous pulleys 23 between the two first transmission shafts 22 at the front end and the first synchronous pulleys 23 between the two first transmission shafts 22 at the rear end are connected through a first synchronous belt 24; the adjacent two first transmission shafts 22 at the middle section are each fixed with a second synchronous pulley 25, the two second synchronous pulleys 25 are connected through a second synchronous belt 26; one of the first transmission shafts 22 at the middle section is fixed with a driving secondary synchronous pulley 27; the first servo motor 21 is fixedly installed on the trolley frame 10, the output shaft end of the first servo motor 21 is fixed with a driving synchronous pulley 28, and the driving synchronous pulley 28 and the driving secondary synchronous pulley 27 are connected through a main synchronous belt 29. When working, the first servo motor 21 is started, the driving synchronous pulley 28 and the main synchronous belt 29 drive the driving secondary synchronous pulley 27 to rotate around its own center axis, in turn drive the first transmission shaft 22 provided with the driving secondary synchronous pulley 27 to rotate, and then drive the remaining first transmission shafts 22 to rotate through the first synchronous belt 24 and the second synchronous belt 26, and finally drive the wheels 20 at the two ends of the four first transmission shafts 22 to rotate synchronously, so that the four groups of wheels 20 are driven by one first servo motor 21, and the RGV trolley can be smoothly driven to move.

[0035] As Figure 1 , Figure 2As shown, a double-speed chain assembly 30 is provided on the top of the frame 10. The double-speed chain assembly 30 includes:

[0036] Two speed-multiplying chains 31 are used for transmission. Driven sprockets 32 are rotatably installed on the front and rear ends of both sides of the frame 10. A speed-multiplying chain 31 is fitted on each of the two driven sprockets 32 on each side.

[0037] Two second drive shafts 33 are connected to the two driven sprockets 32 at the front end and the two driven sprockets 32 at the rear end via a second drive shaft 33. One of the second drive shafts 33 is fixed to the frame 10 and can rotate relative to the driven sprockets 32 at both ends. The other second drive shaft 33 is rotatably mounted on the frame 10. Both ends of the second drive shaft 33 are fixedly connected to the driven sprockets 32, and a drive auxiliary sprocket 34 is fixed on the second drive shaft 33.

[0038] The second servo motor 35 is fixed on the frame 10. The output shaft end of the second servo motor 35 is fixed with a drive sprocket 36. A transmission chain is provided between the drive sprocket 36 and the drive auxiliary sprocket 34.

[0039] In some embodiments, a set of double-speed chain assemblies 30 is provided on top of the frame 10.

[0040] In other embodiments, two sets of double-speed chain assemblies 30 are provided, arranged vertically. Both the upper and lower layers can be used to transport current transformer products, and the two sets of double-speed chain assemblies 30 have opposite transmission directions.

[0041] The operating principle of the speed-up chain component 30 is as follows:

[0042] The second servo motor 35 starts and drives the second transmission shaft 33, which is equipped with the active auxiliary sprocket 34, to rotate through the cooperation of the active auxiliary sprocket 34, the active sprocket 36 and the transmission chain. This drives the driven sprockets 32 at both ends to rotate, and then drives another second transmission shaft 33 and its driven sprockets 32 at both ends to rotate through the double speed chain 31, so as to realize the synchronous transmission of the two double speed chains 31.

[0043] In this embodiment, baffles 40 are provided at the front end of both sets of double-speed chain assemblies 30 in the transmission direction. The baffles 40 are driven to rotate by stepper motors 41, and can rotate to be higher or lower than the double-speed chain 31. The baffles 40 are provided to prevent the current transformer product from falling off due to inertia when the RGV trolley suddenly stops. The use of stepper motors 41 for driving is low-cost, compact in structure, and does not require occupying too much space in the frame 10.

[0044] like Figure 1 As shown, a positioning pin hole is provided on the second drive shaft 33, which is fixed to the frame 10, and a positioning pin 38 is fixed on the frame 10, with the positioning pin 38 passing through the positioning pin hole.

[0045] Preferably, the second transmission shaft 33 is provided with a guide wheel 37 at both ends for guiding the transformer product.

[0046] The four wheels 20 of the RGV trolley are increased to eight, and the two groups of wheels 20 at the front end are close, the two groups of wheels 20 at the rear end are close, and the two groups of wheels 20 in the middle are far apart. In this way, even if the track is broken, even if the front wheels travel to the broken part of the track, because there are six wheels 20 behind to support, the two front wheels 20 will not fall forward and be stuck in the broken part. The two groups of wheels 20 in the middle will not be stuck in the broken part of the track because the front and rear groups of wheels 20 are supported. After the three groups of wheels 20 in the front pass the broken part, the last group of wheels 20 will also pass the broken part smoothly because the three groups of six wheels 20 in front support.

[0047] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An RGV (Automated Guided Vehicle) comprising a frame (10) having wheels (20) at its bottom, characterized in that: The wheels (20) are provided with at least four sets, each set of wheels (20) includes two wheels (20), the distance between the at least two sets of wheels (20) at the front end is S1, the distance between the at least two sets of wheels (20) at the rear end is S2, the distance between the two sets of wheels (20) in the middle section is S3, S3>S1, S3>S2, and the at least four sets of wheels (20) are driven by a first servo motor (21).

2. The RGV trolley according to claim 1, characterized in that: A battery pack is provided at the bottom of the frame (10), the battery pack is connected to the first servo motor (21), and a charging port is provided on the frame (10) for charging the battery pack.

3. The RGV trolley according to claim 1, characterized in that: S2 is equal to S1.

4. The RGV trolley according to claim 1, characterized in that: Each set of wheels (20) also includes a first drive shaft (22), which is rotatably mounted at the bottom of the frame (10) via bearings. Both ends of the first drive shaft (22) extend out of the frame (10) and are connected and fixed to the two wheels (20). At least two first drive shafts (22) at the front end and at least two first drive shafts (22) at the rear end are provided with first synchronous pulleys (23), and each pair of adjacent first synchronous pulleys (23) are connected by a first synchronous belt (24); The two adjacent first drive shafts (22) in the middle section are each fixed with a second synchronous pulley (25), and the two second synchronous pulleys (25) are connected by a second synchronous belt (26); One of the middle sections of the first drive shaft (22) is fixed with a drive pair synchronous pulley (27); The first servo motor (21) is fixedly mounted on the frame (10). The output shaft end of the first servo motor (21) is fixed with an active synchronous pulley (28). The active synchronous pulley (28) and the active auxiliary synchronous pulley (27) are connected by a main synchronous belt (29).

5. The RGV trolley according to claim 1, characterized in that: The top of the frame (10) is provided with a double-speed chain assembly (30), the double-speed chain assembly (30) comprising: Two speed-multiplying chains (31) are used for transmission. Driven sprockets (32) are rotatably provided on the front and rear ends of both sides of the frame (10). A speed-multiplying chain (31) is sleeved on the two driven sprockets (32) on each side. Two second drive shafts (33) are connected to two driven sprockets (32) at the front end and two driven sprockets (32) at the rear end via a second drive shaft (33). One of the second drive shafts (33) is fixed to the frame (10) and can rotate relative to the driven sprockets (32) at both ends. The other second drive shaft (33) is rotatably mounted on the frame (10) and is fixedly connected to the driven sprockets (32) at both ends. A drive sprocket (34) is fixed on the second drive shaft (33). The second servo motor (35) is fixed on the frame (10). The output shaft end of the second servo motor (35) is fixed with a drive sprocket (36). A transmission chain is provided between the drive sprocket (36) and the drive auxiliary sprocket (34).

6. The RGV trolley according to claim 5, characterized in that: The speed-doubler chain assembly (30) is provided in two sets, arranged vertically.

7. The RGV trolley according to claim 6, characterized in that: The two sets of double-speed chain assemblies (30) have opposite transmission directions.

8. The RGV trolley according to claim 6, characterized in that: Both sets of the speed-multiplying chain assemblies (30) are provided with baffles (40) at the front end of the transmission direction. The baffles (40) are driven to rotate by stepper motors (41). The baffles (40) can rotate to be higher or lower than the speed-multiplying chain (31).

9. The RGV trolley according to claim 5, characterized in that: A positioning pin hole is provided on the second drive shaft (33) fixed to the frame (10), and a positioning pin (38) is fixed on the frame (10), the positioning pin (38) passing through the positioning pin hole.

10. The RGV trolley according to claim 5, characterized in that: Guide wheels (37) are provided at both ends of the second drive shaft (33).

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