Motor forklift weighing device

Abstract

The utility model relates to a motor forklift weighing device, which can obviously improve the weighing accuracy and comprises an outer frame and a plurality of groups of weighing assemblies, each weighing assembly comprises a front assembling seat, a rear assembling seat and a weighing sensing limiting assembly, the front assembling seats of the weighing assemblies are fixedly connected to the outer frame, and the rear assembling seats of the weighing assemblies are fixedly connected to the rear assembling seats of the weighing assemblies. The rear side wall of a rear assembling seat of the weighing assembly is provided with a connecting piece connected with a forklift portal frame, the weighing sensing limiting assembly is arranged between a front assembling seat and the rear assembling seat, the front assembling seat and the rear assembling seat are connected through the weighing sensing limiting assembly, and the top of an upper frame plate of the outer frame is provided with a hanging plate edge used for hanging a pallet fork. The weighing sensing and limiting assembly comprises a vertical direction guiding and limiting assembly, a horizontal direction limiting assembly and a force sensor, the vertical direction guiding and limiting assembly, the horizontal direction limiting assembly and the force sensor are all arranged between the front assembling base and the rear assembling base, and the force sensor is vertically arranged. And the upper connecting end and the lower connecting end of the force sensor are respectively connected with the rear assembly seat and the front assembly seat.

Description

Technical Field

[0001] The utility model relates to the field of forklift accessories, in particular to a weighing device for a motorized forklift. Background Art

[0002] A forklift is a commonly used mechanical equipment for transferring items. For example, in industrial production or logistics, a forklift can be used to pick up items and move them to a predetermined location, stack them on the ground, or load them onto a truck for transportation.

[0003] In the prior art, in order to facilitate weighing of the cargo loaded by the forklift and prevent the forklift from tipping over due to overweight of the loaded cargo, a weighing device is provided on the mast of the forklift.

[0004] For example, the patent with publication number CN214748380U discloses a mobile weighing system for industrial vehicles, including an outer frame and a plurality of fixed frames. The outer frame is provided with a plurality of weighing sensors, the weighing sensors are bridge sensors, the weighing sensors are connected to the outer frame and the fixed frame, the fixed frame is provided with a positioning tool, and the outer frame is provided with an anti-detachment hook that cooperates with the positioning tool; the two weighing sensors located at the outer ends of the outer frame are provided with lateral anti-collision baffles on the opposite sides, and the upper and lower ends of the two lateral anti-collision baffles are respectively bridged with dust covers.

[0005] The disadvantage of this motorized forklift weighing device is that the scheme connects the outer frame and the fixed frame through a bridge sensor. When the forklift lifts the goods for weighing, the bridge sensor is subjected to not only vertical loads, but also horizontal loads and front and rear loads. These loads are multi-directional, which will lead to poor accuracy of forklift weighing, so it needs to be improved. Summary of the invention

[0006] The purpose of the utility model is to provide a mobile forklift weighing device that can solve the problem of poor weighing accuracy in the existing industrial vehicle mobile weighing system described in the background technology, which connects the outer frame and the fixed frame through a bridge sensor. The load on the bridge sensor is multi-directional, resulting in poor weighing accuracy.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a motor forklift weighing device, including an outer frame and a plurality of weighing components, the weighing components including a front assembly seat, a rear assembly seat and a weighing sensor limit assembly, the front assembly seat of the weighing component is fixedly connected to the outer frame, the rear side wall of the rear assembly seat of the weighing component is provided with a connecting piece connected to the forklift door frame, the weighing sensor limit assembly is arranged between the front assembly seat and the rear assembly seat, the front assembly seat and the rear assembly seat are connected through the weighing sensor limit assembly, and a hanging plate edge for hanging a cargo fork is provided on the top of the upper frame plate of the outer frame;

[0008] The weighing sensor limit assembly includes a vertical guide limit assembly, a horizontal limit assembly and a force sensor. The vertical guide limit assembly, the horizontal limit assembly and the force sensor are all arranged between the front assembly seat and the rear assembly seat. The force sensor is arranged vertically, the upper connecting end of the force sensor is connected to the rear assembly seat, and the lower connecting end of the force sensor is connected to the front assembly seat, or the upper connecting end of the force sensor is connected to the front assembly seat, and the lower connecting end of the force sensor is connected to the rear assembly seat.

[0009] In the above scheme, a sensor lower connecting seat is provided on the front assembly seat, a sensor upper connecting seat is provided on the rear assembly seat, a positioning pin hole and a bolt hole are provided on the front side of the sensor lower connecting seat, the sensor lower connecting seat and the front assembly seat are positioned and connected by the positioning pin, and are fixedly connected by bolts, a positioning pin hole and a bolt hole are provided on the rear side of the sensor upper connecting seat, the sensor upper connecting seat and the rear assembly seat are positioned and connected by the positioning pin, and are fixedly connected by bolts. By providing the positioning pin, the assembly accuracy of the sensor upper connecting seat and the sensor lower connecting seat can be improved, the assembly accuracy of the force sensor can be improved, and the vertical setting of the force sensor can be ensured. By combining the bolt and the positioning pin, the assembly stability of the sensor upper connecting seat and the sensor lower connecting seat can be further improved.

[0010] In the above scheme, the horizontal direction limit assembly includes an upper horizontal guide limit assembly and a lower horizontal guide limit assembly, and both the upper horizontal guide limit assembly and the lower horizontal guide limit assembly include a left limit bearing and a right limit bearing. The left limit bearing and the right limit bearing of the upper horizontal guide limit assembly are respectively fixedly connected to the front assembly seat through a connecting shaft, and the left limit bearing and the right limit bearing are respectively rollingly matched with the left plate and the right plate of the upper connection seat of the sensor, and the left limit bearing and the right limit bearing of the lower horizontal guide limit assembly are respectively fixedly connected to the rear assembly seat through a connecting shaft, and the left limit bearing and the right limit bearing are respectively rollingly matched with the left plate and the right plate of the lower connection seat of the sensor. By respectively arranging the left limit bearing and the right limit bearing on the left and right sides of the upper connection seat of the sensor and the lower connection seat of the sensor, the horizontal force of the weighing assembly during weighing can be eliminated, and the force sensor is only subjected to the vertical force.

[0011] In the above scheme, the vertical guide limit assembly includes an upper guide limit assembly and a lower guide limit assembly, and the upper guide limit assembly and the lower guide limit assembly both include bearings and bearing guides, the bearing guides are fixedly connected to the rear assembly seat, the bearings are arranged in the bearing guides, and the bearings are connected to the front assembly seat through a connecting piece. Through the cooperation of the bearings and the bearing guides of the upper guide limit assembly and the lower guide limit assembly, the bending moment of the weighing assembly in the front and rear directions during weighing can be eliminated, ensuring that only the force in the vertical direction is applied to the force sensor, and will not affect the relative displacement of the front assembly seat and the rear assembly seat in the vertical direction caused by the force in the vertical direction, thereby improving the weighing accuracy of the weighing assembly. When the forklift is bumpy or impacted during operation, the shaft and the bearings will move in the vertical direction. By setting the bearing guides, the movement of the shaft and the bearings can be limited.

[0012] In the above scheme, the bearing guide rail of the upper guide limit assembly is a rectangular frame structure, the bearing is arranged in the bearing guide rail, and a reinforcing block is arranged on the inner side of the front side plate of the bearing guide rail, the reinforcing block is a polished platform protruding from the bearing guide rail, the connecting member includes a rotating shaft and a connecting block, the rotating shaft is fixedly connected to the connecting block, the connecting block is fixedly connected to the front assembly seat, and the two ends of the rotating shaft pass through the inner holes of the two rectangular frames respectively, and are fixedly connected to the inner ring of the bearing in the rectangular frame. Through this arrangement, the assembly accuracy of the bearing of the upper guide limit assembly and the bearing guide rail can be higher, and by setting the reinforcing block, the strength of the front side plate of the bearing guide rail can be enhanced, so that the front side plate of the bearing guide rail can withstand the load pressure of the bearing acting on the bearing guide rail during weighing, and prevent the deformation or damage of the bearing guide rail.

[0013] In the above scheme, the bearing guide rail of the lower guide limit assembly includes a half frame and a reinforcement block, the half frame and the reinforcement block are respectively fixedly connected to the rear assembly seat, the reinforcement block is arranged on the rear side of the half frame, the bearing is arranged in the half-frame-shaped bearing guide rail, the connecting member includes a rotating shaft and a connecting block, the rotating shaft is fixedly connected to the connecting block, the connecting block is fixedly connected to the front assembly seat, and the two ends of the rotating shaft pass through the inner holes of the two half frames respectively and are fixedly connected to the inner ring of the bearing. Through this arrangement, the bearing guide rail is arranged as a half frame, which can not only play a role in limiting the bearing, but also because the force-bearing part of the lower guide limit assembly is the rear side, by arranging the reinforcement block on the rear side of the half frame, it can withstand the load of the bearing in the rear direction during weighing, and prevent the deformation or damage of the bearing guide rail.

[0014] In the above scheme, at least two positioning pin holes and bolt holes are provided on the connection block, and the connection block and the front assembly seat are positioned and connected by the positioning pins and fixedly connected by bolts. By providing the positioning pin holes on the connection block and positioning and connecting the connection block and the front assembly seat by the positioning pins, the assembly accuracy of the connection block can be improved, and the axial direction of the bearing is guaranteed to be horizontal. When weighing, the bearing can only move in the vertical direction, thereby improving its guiding and limiting performance. By combining the bolts and the positioning pins, the assembly stability of the connection block and the front assembly seat can be further improved.

[0015] In the above scheme, the front assembly seat includes a front side plate, a left side plate and a right side plate, the left side plate and the right side plate are fixedly connected to the left and right sides of the front side plate respectively, and the upper and lower end surfaces of the front side plate, the left side plate and the right side plate are respectively welded to the upper frame plate and the lower frame plate of the outer frame; the rear assembly seat includes a rear side plate, an upper protective cover, a lower sealing plate, a left side plate and a right side plate, the upper protective cover is fixedly connected to the upper part of the rear side plate, the lower sealing plate is fixedly connected to the lower part of the rear side plate, the left side plate and the right side plate are fixedly connected to the left and right sides of the rear side plate respectively, and the left side plate and the right side plate of the rear assembly seat are arranged opposite to the left side plate and the right side plate of the front assembly seat.

[0016] In the above scheme, an assembly auxiliary frame is provided on the outer frame, and the assembly auxiliary frame is detachably fixedly connected to the outer frame. A horizontal mounting plate is connected to the upper frame plate of the outer frame, and the horizontal mounting plate is used to install the external components of the weighing assembly. Because the weight of the motor forklift weighing device is heavy, by providing an assembly auxiliary frame, when the motor forklift weighing device of the utility model is assembled on the forklift, the motor forklift weighing device of the utility model can be vertically placed on the front side of the forklift through the support of the assembly auxiliary frame, so as to facilitate the assembly of the motor forklift weighing device of the utility model on the forklift, save manpower and improve assembly efficiency.

[0017] In the above scheme, there are two groups of weighing components, which are respectively arranged on the left and right sides of the outer frame. A connecting plate is provided between the rear assembly seats of the two groups of weighing components, and a positioning protrusion is provided on the lower end surface of the connecting plate. By providing two groups of weighing components, the weighing range of the motor forklift weighing device can be expanded, and the connection stability between the motor forklift weighing device and the forklift can be made higher. By providing a connecting plate, the two groups of weighing components can be connected to maintain the stability of the positional relationship between the two. By providing a positioning protrusion on the connecting plate and combining it with the positioning groove on the forklift mast, the motor forklift weighing device can be positioned in the horizontal direction when it is assembled on the forklift.

[0018] The utility model has positive effects: 1) The motorized forklift weighing device of the utility model has improved the weighing components. Compared with the solution of weighing only by bridge sensors in the prior art, it can eliminate the forces in the left and right directions and the front and back directions during weighing, and only retain the forces in the vertical direction, so that the weighing accuracy of the motorized forklift weighing device is higher. 2) The motorized forklift weighing device of the utility model is provided with an outer frame and a weighing component. When in use, the fork of the forklift is hung on the outer frame. Compared with the solution of the prior art that the weighing components are respectively connected to the front side of the forklift and the fork is hung on the weighing component when in use, the connection stability of the fork and the outer frame is high. When weighing, the load force of the fork is redistributed to several weighing components through the outer frame. The forces of each weighing component are more uniform. Even if the cargo with offset center of gravity is weighed, the weighing component can be ensured not to tilt, thereby ensuring the weighing accuracy of the motorized forklift weighing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front structure of the motor forklift weighing device of the utility model.

[0020] Figure 2 It is a schematic diagram of the rear structure of the motor forklift weighing device of the utility model.

[0021] Figure 3 Schematic diagram of the front structure of the outer frame.

[0022] Figure 4 Schematic diagram of the rear structure of the outer frame.

[0023] Figure 5 Schematic diagram of the internal structure of the weighing component.

[0024] The accompanying drawings are marked as follows: outer frame 1, upper frame plate 11, lower frame plate 12, left frame plate 13, right frame plate 14, hanging plate edge 15, horizontal mounting plate 16, reinforced angle iron 17, weighing component 2, front assembly seat 21, front side plate 211, left side plate 212, right side plate 213, pad 214, sensor lower connecting seat 215, rear assembly seat 22, rear side plate 221, upper protective cover 222, lower sealing plate 223, connecting piece 224, sensor upper connecting seat 225, force sensor 23, vertical guide limit assembly 24, bearing 241, bearing guide rail 242, reinforcement block 243, connecting block 244, positioning pin hole 245, bolt hole 246, half frame 247, reinforcement block 248, horizontal limit assembly 25, left limit bearing 251, right limit bearing 252, assembly auxiliary frame 3, external component 4, connecting plate 5, positioning protrusion 51. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is described clearly and completely below through embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-5 A mobile forklift weighing device is shown, comprising an outer frame and a weighing assembly.

[0027] The outer frame 1 may be a rectangular frame, or a plate with required strength.

[0028] The outer frame 1 includes an upper frame plate 11, a lower frame plate 12, a left frame plate 13 and a right frame plate 14, and the upper frame plate 11, the lower frame plate 12, the left frame plate 13 and the right frame plate 14 are fixedly connected.

[0029] A hanging plate edge 15 for hanging a fork is provided at the top of the upper frame plate 11 of the outer frame 1, and the fork of the forklift can be supported and fixed by the hanging plate edge 15. On the hanging plate edge 15, a positioning groove is provided at a set interval, and the fork is positioned and supported by the positioning groove.

[0030] A horizontal mounting plate 16 is connected to the upper frame plate 11 of the outer frame 1 , and the horizontal mounting plate 16 is used to mount the external components 4 of the weighing component 2 , such as the battery and weighing signal collector of the weighing component.

[0031] In order to facilitate the installation and fixing of the motor forklift weighing device on the forklift mast, an assembly auxiliary frame 3 is provided on the outer frame 1, and the assembly auxiliary frame 3 is detachably fixedly connected to the outer frame 1. The assembly auxiliary frame 3 can be a right-angle frame composed of a column and a horizontal plate. In order to enhance the strength of the right-angle frame, a diagonal brace plate can be provided between the column and the horizontal plate of the right-angle frame. The diagonal brace plate makes the assembly auxiliary frame 3 have a stronger supporting capacity, so that the assembly auxiliary frame 3 can stably support the motor forklift weighing device, thereby saving labor and effort when installing the motor forklift weighing device on the forklift mast.

[0032] The number of weighing components 2 can be set as needed. For example, if one group of weighing components 2 is set, the weighing components 2 are set in the middle of the outer frame 1. Two groups of weighing components can also be set, and the weighing components are set on the left and right sides of the outer frame, and the weighing components on the left and right sides are symmetrically arranged on the outer frame. If three groups of weighing components are set, one group of weighing components can be set in the middle, and one group of weighing components can be symmetrically arranged on the left and right sides.

[0033] like Figure 1In the illustrated embodiment, there are two groups of weighing components 2, and the two groups of weighing components 2 are respectively arranged on the left and right sides of the outer frame 1. A connecting plate 5 is provided between the rear assembly seats 22 of the two groups of weighing components 2, and a positioning protrusion 51 is provided on the lower end surface of the connecting plate 5. By providing two groups of weighing components 2, the weighing range of the motor forklift weighing device can be expanded, and the connection stability between the motor forklift weighing device and the forklift can be made higher. By providing the connecting plate 5, the two groups of weighing components 2 can be connected to maintain the stability of the positional relationship between the two. By providing the positioning protrusion 51 on the connecting plate 5 and combining it with the positioning groove on the forklift mast, the motor forklift weighing device can be positioned in the horizontal direction when it is assembled on the forklift.

[0034] like Figure 1-5 As shown, the weighing assembly 2 includes a front assembly seat 21, a rear assembly seat 22 and a weighing sensor limit assembly.

[0035] The front assembly seat 21 of the weighing assembly 2 is fixedly connected to the outer frame 1. The front assembly seat 21 includes a front side plate 211, a left side plate 212 and a right side plate 213, the left side plate 212 and the right side plate 213 are respectively fixedly connected to the left and right sides of the front side plate 211, the front side plate 211, the left side plate 212 and the right side plate 213 are respectively fixedly connected between the upper frame plate 11 and the lower frame plate 12 of the outer frame 1, and the connection mode can be selected as needed, preferably the front side plate 211, the left side plate 212 and the right side plate 213 are welded and connected between the upper frame plate 11 and the lower frame plate 12 of the outer frame 1, the front assembly seat 21 opening is set toward the rear side direction of the outer frame 1, and the height of the front assembly seat 21 corresponds to the distance between the upper frame plate 11 and the lower frame plate 12. The connection between the left side plate 212 or the right side plate 213 and the upper frame plate 11 and the lower frame plate 12 of the outer frame 1 is provided with a reinforcing angle iron 17, and the connection stability between the front side plate 211 and the outer frame 1 can be enhanced by providing the reinforcing angle iron 17. A wire hole can be provided on the left side plate 212 or the right side plate 213, and the connection wire of the force sensor 23 in the weighing component 2 can extend through the wire hole to the outside of the weighing component 2 and connect to the external component 4.

[0036] As an optional solution, grooves are provided at positions corresponding to the front assembly seat 21 on the upper frame plate 11 and the lower frame plate 12 of the outer frame 1, and the width of the grooves is adapted to the width of the front side plate 211 of the front assembly seat 21. Through this arrangement, the connection surface between the front side plate 211 and the upper frame plate 11 and the lower frame plate 12 of the outer frame 1 can be enlarged, and the groove surface can be used for the assembly of the connecting block in the vertical direction guide limit assembly, ensuring that the weighing sensor limit assembly can be assembled between the upper frame plate 11 and the lower frame plate 12 of the outer frame.

[0037] The weighing sensor limit assembly is arranged between the front assembly seat 21 and the rear assembly seat 22 .

[0038] The rear assembly seat 22 includes a rear side plate 221, an upper protective cover 222 and a lower sealing plate 223. The upper protective cover 222 is fixedly connected to the upper part of the rear side plate 221, and the lower sealing plate 223 is fixedly connected to the lower part of the rear side plate 221. The rear assembly seat 22 of the weighing assembly is provided with a connector 224 connected to the forklift mast, and the connector 224 can be a connector matched with an upper hook and a lower hook. Through the cooperation of the upper hook and the lower hook with the upper and lower frame plates of the forklift mast, the motor forklift weighing device can be assembled on the mast of the forklift.

[0039] The upper opening portion between the front assembly seat 21 and the rear assembly seat 22 is sealed by the upper protective cover 222 , and the lower opening portion between the front assembly seat 21 and the rear assembly seat 22 is sealed by the lower sealing plate 223 .

[0040] As an alternative, the left side plate and the right side plate of the front assembly seat 21 can extend to the rear side plate 221 of the rear assembly seat 22, so that a sealed space is formed between the rear assembly seat 22 and the left side plate and the right side plate. Or the width of the left side plate and the right side plate of the front assembly seat 21 can correspond to the width of the upper frame plate 11 and the lower frame plate 12 of the outer frame 1, and the rear assembly seat 22 needs to be provided with a left side plate and a right side plate, so that the cavity between the front side plate and the rear side plate can accommodate the weighing sensor limit assembly. Or according to the embodiment shown in the accompanying drawings, the width of the left side plate and the right side plate of the front assembly seat 21 is greater than the width of the upper frame plate 11 and the lower frame plate 12, and a pad 214 is arranged on the rear side of the upper frame plate 11 and the lower frame plate 12, so that the thickness of the pad 214 is the thickness difference between the left side plate 212 and the right side plate 213 and the upper frame plate 11 and the lower frame plate 12, so that the fixing of the left side plate 212 and the right side plate 213 on the front assembly seat 21 is more firm.

[0041] The weighing sensor limit assembly includes a vertical direction guide limit assembly 24 , a horizontal direction limit assembly 25 and a force sensor 23 .

[0042] The force sensor 23 may be selected from Figure 5 The S-shaped force sensor shown in FIG. 2 , the force sensor 23 may be a tension sensor or a pressure sensor or a force sensor that can detect both tension and pressure.

[0043] The vertical direction guide limit assembly 24, the horizontal direction limit assembly 25 and the force sensor 23 are all arranged between the front assembly seat 21 and the rear assembly seat 22. The force sensor 23 is arranged vertically. One of the upper connecting end and the lower connecting end of the force sensor 23 is connected to the front assembly seat 21, and the other is connected to the rear assembly seat 22. As an implementation scheme, a sensor lower connecting seat 215 is provided on the front assembly seat 21, and a sensor upper connecting seat 225 is provided on the rear assembly seat 22. The upper connecting end and the lower connecting end of the force sensor 23 are respectively movably connected to the sensor upper connecting seat 225 and the sensor lower connecting seat 215. As another implementation scheme, a sensor upper connecting seat is provided on the front assembly seat 21, and a sensor lower connecting seat is provided on the rear assembly seat 22. The upper connecting end and the lower connecting end of the force sensor 23 are respectively movably connected to the sensor upper connecting seat and the sensor lower connecting seat.

[0044] In order to make the connection accuracy between the lower connecting seat 215 of the sensor and the front assembly seat 21 higher, a positioning pin hole and a bolt hole are provided on the front side of the lower connecting seat 215 of the sensor, and the installation accuracy of the lower connecting seat 215 of the sensor and the front assembly seat 21 is improved by the combination of the positioning pin hole and the bolt hole. Similarly, positioning pin holes and bolt holes can be provided on the rear side of the upper connecting seat 225 of the sensor, and the installation accuracy of the upper connecting seat of the sensor and the rear assembly seat is improved by the combination of the positioning pin hole and the bolt hole. By improving the installation accuracy of the upper connecting seat of the sensor and the lower connecting seat of the sensor, the installation accuracy of the force sensor can be improved, thereby improving the weighing accuracy of the weighing device.

[0045] The horizontal direction limit assembly 25 includes an upper horizontal guide limit assembly and a lower horizontal guide limit assembly, and both the upper horizontal guide limit assembly and the lower horizontal guide limit assembly include a left limit bearing 251 and a right limit bearing 252. The left limit bearing 251 and the right limit bearing 252 of the upper horizontal guide limit assembly are respectively fixedly connected to the front assembly seat 21 through a connecting shaft, and the left limit bearing 251 and the right limit bearing 252 are respectively rollingly matched with the left plate and the right plate of the upper connecting seat 225 of the sensor, and the left limit bearing 251 and the right limit bearing 252 of the lower horizontal guide limit assembly are respectively fixedly connected to the rear assembly seat 22 through a connecting shaft, and the left limit bearing 251 and the right limit bearing 252 are respectively rollingly matched with the left plate and the right plate of the lower connecting seat 215 of the sensor.

[0046] The vertical direction guide limit assembly 24 includes an upper guide limit assembly and a lower guide limit assembly, both of which include a bearing 241 and a bearing guide rail 242, the bearing guide rail 242 is fixedly connected to the rear assembly seat 22, the bearing 241 is arranged in the bearing guide rail 242, and the bearing 241 is connected to the front assembly seat 21 through a connecting piece.

[0047] The bearing guide rail 242 is a rectangular frame structure, the bearing 241 is arranged in the rectangular frame, the connecting part includes a rotating shaft and a connecting block 244, the rotating shaft is fixedly connected to the connecting block 244, the connecting block 244 is fixedly connected to the front assembly seat 21, and the two ends of the rotating shaft respectively pass through the inner holes of the two rectangular frames and are fixedly connected to the inner ring of the bearing 241 in the rectangular frame.

[0048] In order to enhance the strength of the front side of the bearing guide rail 242, a strengthening block 243 is provided on the inner side of the front side plate of the bearing guide rail 242 of the upper guide limit assembly. The strengthening block is a flat platform protruding from the bearing guide rail.

[0049] At least two positioning pin holes and bolt holes are provided on the connecting block 244. The connecting block 244 is positioned and connected to the front side plate 211 of the front assembly seat 21 through the positioning pins, and is fixedly connected to the front side plate 211 through bolts. Because the bolt assembly method will make the positioning accuracy of the connecting block 244 and the front assembly seat 21 poor, but before the bolt connection, the connecting block 244 is first positioned by the positioning pins, and then connected by the bolts, which can make the connection accuracy of the connecting block 244 and the front side plate 211 higher, and then make the matching accuracy of the bearing 241 and the bearing guide rail 242 higher, and improve the weighing accuracy of the weighing assembly.

[0050] As an alternative, the bearing guide rail of the lower guide limit assembly can be a rectangular bearing guide rail that is the same as that of the upper guide limit assembly. In order to make the height of the weighing sensor limit assembly adapt to the height of the forklift outer frame, the bearing guide rail of the lower guide limit assembly can also be set as a half frame 247, and a reinforcing block 248 is set on the rear side of the half frame 247, and the reinforcing block 248 is fixedly connected to the rear side plate 221 of the rear assembly seat 22. This arrangement can save the material of the bearing guide rail, reduce the weight of the weighing assembly, and reduce the height of the bearing guide rail.

[0051] Because when the forklift lifts the cargo, the torque generated by the weight of the cargo acts on the outer frame 1 through the cargo fork, and then acts on the front side plate 211 of the weighing assembly 2. The torque on the upper part of the front side plate 211 is in the forward direction, and the torque on the lower part of the front side plate 211 is in the rearward direction. Therefore, in the upper guide limit assembly, the bearing 241 will abut against the front side of the bearing guide rail 242. The reinforcing block 243 set on the front side plate of the bearing guide rail 242 can enhance its strength to prevent the front side plate of the bearing guide rail 242 from being deformed due to excessive load. The surface of the reinforcing block is flat and polished to facilitate the up and down rolling of the bearing. The bearing 241 of the lower guide limit assembly abuts against the reinforcing block 248 on the rear side of the half frame 247, so the half frame 247 will not be subjected to load, and the use of the half frame 247 will not affect the weighing accuracy of the weighing assembly.

[0052] As another implementation scheme, if the outer frame 1 is made of plate material, the front assembly seat of the weighing component 2 can be omitted, and the rear assembly seat 22 of the weighing component 2 can be directly connected to the plate material through a weighing sensor limit assembly to form the motor forklift weighing device of the present invention.

[0053] When the mobile forklift weighing device of the utility model is used, the mobile forklift weighing device must first be installed on the mast of the forklift. During installation, the assembly auxiliary frame can be installed on the outer frame first, and then the mobile forklift weighing device can be supported by the assembly auxiliary frame. Then the staff can install it on the forklift mast through the connecting piece on the rear assembly seat of the weighing component. The connecting piece can be an upper hook and a lower hook, wherein the lower hook can be detachably fixed on the rear assembly seat. During installation, the upper hook can be first hung on the mast at a suitable position, so that the positioning protrusion on the connecting plate between the two weighing components is engaged in the positioning groove on the forklift mast, and then the lower hook can be installed, and the upper frame and the lower frame of the mast are limitedly connected by the upper hook and the lower hook. After the mobile forklift weighing device is installed on the forklift, the fork is fixedly connected to the outer frame by the connecting piece on the fork.

[0054] The mobile forklift weighing device of the utility model sets the weighing assembly on the fork frame of the forklift, and combines the weighing assembly with the fork frame as a whole, which can simplify the connection between the mobile forklift weighing device and the forklift mast. Moreover, compared with the solution in the prior art that the weighing assembly is respectively connected to the front side of the forklift and then the fork is connected to the weighing assembly, the connection stability of the fork and the outer frame is high. During weighing, the load of the fork is redistributed to several weighing assemblies through the outer frame, and the force of each weighing assembly is more uniform. Therefore, even if the center of gravity of the weighed goods is offset, the weighing accuracy of the mobile forklift weighing device can be guaranteed. For example, when the forklift forks up goods such as cloth rolls, the part of the cloth roll between the two forks will drop, causing the fork to deflect outward. If two weighing assemblies are respectively connected to the front side of the forklift and then the fork is connected to the weighing assembly, the deflection of the fork will cause the horizontal load on the two weighing assemblies to increase, so that the weighing accuracy of the weighing assemblies will decrease. With the motorized forklift weighing device of the present invention, since the weight of the cargo is transmitted to the outer frame through the cargo fork and then transmitted to the weighing assembly through the outer frame, the deflection of the cargo fork will not affect the weighing of the weighing assembly, and the weighing accuracy can still be guaranteed.

[0055] The motorized forklift weighing device of the utility model can eliminate the loads in the left-right direction and the front-back direction during weighing, and only retain the loads in the vertical direction, so that the weighing accuracy of the motorized forklift weighing device is higher. The utility model improves the assembly accuracy of the upper sensor connection seat and the lower sensor connection seat of the force sensor by connecting the positioning pins and bolts, ensures the vertical installation of the force sensor, and can further improve the weighing accuracy of the force sensor. The utility model improves the assembly accuracy of the upper guide limit assembly and the lower guide limit assembly by connecting the positioning pins and bolts, so that the axial direction of the bearing is limited to the horizontal direction, further improving the weighing accuracy. The utility model sets the bearing guide rail of the lower guide limit assembly as a semi-frame structure, which can reduce the volume of the lower guide limit assembly, making the volume of the motor forklift weighing device of the utility model smaller, and make the height of the front assembly seat adapt to the spacing between the upper frame plate and the lower frame plate of the outer frame, so that the weighing assembly of the utility model can be installed on the outer frame, and at the same time, it can save materials and reduce its weight while ensuring the load-bearing capacity of the bearing guide rail, thereby reducing the overall weight of the utility model and improving the forklift forklift and weighing capacity.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mobile forklift weighing device, characterized in that: It includes an outer frame and several groups of weighing components, the weighing components include a front assembly seat, a rear assembly seat and a weighing sensor limit assembly, the front assembly seat of the weighing component is fixedly connected to the outer frame, the rear side wall of the rear assembly seat of the weighing component is provided with a connector connected to the forklift door frame, the weighing sensor limit assembly is arranged between the front assembly seat and the rear assembly seat, the front assembly seat and the rear assembly seat are connected through the weighing sensor limit assembly, and a hanging plate edge for hanging a fork is provided on the top of the upper frame plate of the outer frame; The weighing sensor limit assembly includes a vertical guide limit assembly, a horizontal limit assembly and a force sensor. The vertical guide limit assembly, the horizontal limit assembly and the force sensor are all arranged between the front assembly seat and the rear assembly seat. The force sensor is arranged vertically, the upper connecting end of the force sensor is connected to the rear assembly seat, and the lower connecting end of the force sensor is connected to the front assembly seat, or the upper connecting end of the force sensor is connected to the front assembly seat, and the lower connecting end of the force sensor is connected to the rear assembly seat.

2. The mobile forklift weighing device according to claim 1, characterized in that: A sensor lower connecting seat is provided on the front assembly seat, and a sensor upper connecting seat is provided on the rear assembly seat. A positioning pin hole and a bolt hole are provided on the front side surface of the sensor lower connecting seat. The sensor lower connecting seat and the front assembly seat are positioned and connected by the positioning pins and fixedly connected by bolts. A positioning pin hole and a bolt hole are provided on the rear side surface of the sensor upper connecting seat. The sensor upper connecting seat and the rear assembly seat are positioned and connected by the positioning pins and fixedly connected by bolts.

3. The mobile forklift weighing device according to claim 2, characterized in that: The horizontal direction limit assembly includes an upper horizontal guide limit assembly and a lower horizontal guide limit assembly, and both the upper horizontal guide limit assembly and the lower horizontal guide limit assembly include a left limit bearing and a right limit bearing. The left limit bearing and the right limit bearing of the upper horizontal guide limit assembly are respectively fixedly connected to the front assembly seat through a connecting shaft, and the left limit bearing and the right limit bearing are respectively rollingly matched with the left plate and the right plate of the upper connecting seat of the sensor. The left limit bearing and the right limit bearing of the lower horizontal guide limit assembly are respectively fixedly connected to the rear assembly seat through a connecting shaft, and the left limit bearing and the right limit bearing are respectively rollingly matched with the left plate and the right plate of the lower connecting seat of the sensor.

4. The mobile forklift weighing device according to claim 1, characterized in that: The vertical guide limit assembly includes an upper guide limit assembly and a lower guide limit assembly. Both the upper guide limit assembly and the lower guide limit assembly include a bearing and a bearing guide rail. The bearing guide rail is fixedly connected to the rear assembly seat. The bearing is arranged in the bearing guide rail, and the bearing is connected to the front assembly seat through a connecting piece.

5. The mobile forklift weighing device according to claim 4, characterized in that: The bearing guide rail of the upper guide limit assembly is a rectangular frame structure, the bearing is arranged in the bearing guide rail, a reinforcement block is provided on the inner side of the front side plate of the bearing guide rail, the connecting piece includes a rotating shaft and a connecting block, the rotating shaft is fixedly connected to the connecting block, the connecting block is fixedly connected to the front assembly seat, and the two ends of the rotating shaft respectively pass through the inner holes of the two rectangular frames and are fixedly connected to the inner ring of the bearing in the rectangular frame.

6. The mobile forklift weighing device according to claim 4, characterized in that: The bearing guide rail of the lower guide limit assembly includes a half frame and a reinforcement block, the half frame and the reinforcement block are respectively fixedly connected to the rear assembly seat, the reinforcement block is arranged on the rear side of the half frame, the bearing is arranged in the half-frame shaped bearing guide rail, the connecting part includes a rotating shaft and a connecting block, the rotating shaft is fixedly connected to the connecting block, the connecting block is fixedly connected to the front assembly seat, and the two ends of the rotating shaft respectively pass through the inner holes of the two half frames and are fixedly connected to the inner ring of the bearing.

7. The mobile forklift weighing device according to claim 5 or 6, characterized in that: The connection block is provided with at least two positioning pin holes and bolt holes. The connection block and the front assembly seat are positioned and connected by the positioning pins and fixedly connected by bolts.

8. The mobile forklift weighing device according to claim 1, characterized in that: The front assembly seat includes a front side plate, a left side plate and a right side plate, the left side plate and the right side plate are fixedly connected to the left and right sides of the front side plate respectively, and the upper and lower end surfaces of the front side plate, the left side plate and the right side plate are respectively welded to the upper frame plate and the lower frame plate of the outer frame; the rear assembly seat includes a rear side plate, an upper protective cover, a lower sealing plate, a left side plate and a right side plate, the upper protective cover is fixedly connected to the upper part of the rear side plate, the lower sealing plate is fixedly connected to the lower part of the rear side plate, the left side plate and the right side plate are fixedly connected to the left and right sides of the rear side plate respectively, and the left side plate and the right side plate of the rear assembly seat are arranged opposite to the left side plate and the right side plate of the front assembly seat.

9. The mobile forklift weighing device according to claim 1, characterized in that: The outer frame is provided with an assembly auxiliary frame, which is detachably fixedly connected to the outer frame. The upper frame plate of the outer frame is connected with a horizontal mounting plate, which is used to install an external component of the weighing component.

10. The mobile forklift weighing device according to claim 1, characterized in that: There are two groups of weighing components, which are respectively arranged on the left and right sides of the outer frame. A connecting plate is arranged between the rear assembly seats of the two groups of weighing components, and a positioning protrusion is arranged on the lower end surface of the connecting plate.

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