CN216808007U

CN216808007U - Forklift weighing device and forklift weighing system

Info

Publication number: CN216808007U
Application number: CN202220334516.XU
Authority: CN
Inventors: 魏明良
Original assignee: Changzhou Yizhe Software Co ltd
Current assignee: Changzhou Yizhe Software Co ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2022-06-24
Anticipated expiration: 2032-02-18
Also published as: WO2023155799A1

Abstract

The utility model relates to a forklift weighing device and a forklift weighing system. The forklift weighing device is simple in structure, high in weighing precision, easy to machine and assemble and low in cost; need not do any transformation to fork truck, install between fork tooth and the portal of fork truck, practice thrift the cost.

Description

Forklift weighing device and forklift weighing system

Technical Field

The utility model relates to a weighing device, in particular to a forklift weighing device and a forklift weighing system.

Background

In the field of logistics transportation, weighing goods is a necessary link of logistics operation in order to meter or avoid overweight in transportation. Currently, the mainstream weighing method of logistics enterprises is to fork goods on a weighbridge and then weigh the goods. The forklift scale can weigh goods while forking, operation steps are reduced, and manpower and material resources are saved.

The forklift scale which is visible on the market is a chain type forklift scale, but the forklift scale sensor is arranged on a forklift gantry chain, so that the friction force problem cannot be solved, and the weighing is not accurate; meanwhile, the operation requirement is high, the fork tines are required to be lifted at a constant speed for a certain distance to weigh, and the operation is inconvenient.

In the prior patent technology, a forklift weighing module mainly adopts two structural modes, namely, a sensor, such as a shear beam sensor and a bridge sensor, is directly used; and secondly, a sliding assembly is adopted to add a tension or pressure sensor. Patent No. CN103193182 entitled forklift scale weighing module discloses a forklift weighing module, which adopts the aforementioned second mode, and its sliding assembly is composed of a fixed guide block and a guide rail. However, sliding friction exists between the fixed guide block and the guide rail, the sliding friction coefficient is large, and when the fixed guide block bears a heavy load, the friction force in the vertical direction is large, so that the reading of the tension sensor or the pressure sensor is influenced, and the weighing is inaccurate.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the problem of adopt slip subassembly to add pulling force or pressure sensor's fork truck balance among the prior art to weigh inaccurately when great load is solved, a fork truck weighing device and fork truck weighing system are provided.

The technical scheme for realizing the purpose of the utility model is as follows: a forklift weighing device comprises a front hanging plate, a rear hanging plate, force sensors and the like, wherein the front hanging plate and the rear hanging plate are steel plates, the thickness of the front hanging plate and the thickness of the rear hanging plate are preferably about 2cm; the upper end and the lower end of the rear hanging plate are respectively and fixedly provided with a bearing guide rail, the bearing guide rails are of square frame structures, the number of the bearing guide rails is consistent with that of the bearings, the rear hanging plate is made of alloy steel, the inner surface of the rear hanging plate, namely, the contact surface with the bearings, needs to be subjected to quenching treatment, the surface is subjected to fine processing after quenching to be smooth, the surface hardness is preferably 40-55 HRC, and besides the surface quenching treatment, hard materials can be embedded or installed on the inner surface to meet the hardness requirement. The requirements of surface smoothness and hardness are all to make the bearing move less in the vertical direction, so that the weighing device can accurately weigh. The circular shape bearing passes through the axle and the fixed block is installed inside the bearing guide rail, during the use, fork truck weighing device joint is on fork truck portal, the bearing is along with preceding link plate vertical direction removal after the atress, preceding link plate can receive vertical force completely when keeping parallel force sensor, during nonparallel, the gravity of goods can be offset, influence the measurement of force sensor vertical direction force, the distance of the stress surface of bearing and bearing guide rail internal diameter is 0.02~0.03mm, the clearance undersize of bearing surface and bearing guide rail internal surface, the bearing rotates and is obstructed, produce frictional force, too big clearance, preceding link plate is more nonparallel with back link plate when the atress, influence measurement accuracy equally, when bearing guide rail horizontal inner width is the same with bearing external diameter, processing is simple and convenient, simultaneously the preceding link plate of atress can be fine keep the depth of parallelism.

The front hanging plate is fixedly provided with limiting blocks, the limiting blocks are steel plates which are connected with the plate body of the front hanging plate through bolts and protrude out of the front hanging plate, the rear hanging plate is provided with limiting bearings matched with the limiting blocks, and after the front hanging plate and the rear hanging plate are installed, all the limiting blocks are arranged inside the corresponding limiting bearings or outside the corresponding limiting bearings to form limiting so as to limit non-vertical relative displacement of the front hanging plate and the rear hanging plate, such as shaking and the like in use. Preferably, the quantity of the limiting blocks and the limiting bearings is respectively 4, the limiting blocks and the limiting bearings are symmetrically arranged and are arranged in the middle of the front hanging plate and the rear hanging plate and on the inner sides of the upper end bearing, the lower end bearing and the bearing guide rail.

The forklift weighing device also comprises a force sensor which is arranged between the front hanging plate and the rear hanging plate, and the upper end and the lower end of the force sensor are respectively and fixedly connected with the front hanging plate and the rear hanging plate through rod end bearings.

According to the forklift weighing device, the number of the bearings and the number of the bearing guide rails are respectively 4, the bearings are bearings of any type, and needle bearings are preferred due to the fact that the radial load of the needle bearings is large.

The bearing track has the advantages that the size is as small as possible on the basis of meeting the strength, so that the influence of forklift load reduction caused by installation of a forklift scale is reduced.

The utility model discloses a forklift weighing device, which is characterized in that bayonets protruding out of a plate body are respectively arranged at the top and the bottom of a rear hanging plate, a force sensor in the scheme is a tension sensor and is used for being matched with and mounted in a convex tooth and a groove at the lower part of a forklift gantry, 2 weighing devices are preferably selected and are respectively mounted on the forklift gantry when the forklift weighing device is used, and then two fork teeth of a forklift are respectively clamped on the forklift weighing device.

The other scheme of the forklift weighing device is that bayonets protruding out of the plate body are respectively arranged at the top and the bottom of the front hanging plate, and at the moment, the force sensor is a pressure sensor.

The utility model also comprises a forklift weighing system which is provided with the forklift weighing device, the tension and pressure transmitting and transmitting device, the data display device and the printing device, wherein a force sensor of the forklift weighing device is connected with a data line of the tension and pressure transmitting and transmitting device, the tension and pressure transmitting and transmitting device is in wireless transmission connection with the data display device and is arranged on the outer side of the forklift weighing device, and the data display device is connected with the data line of the printing device. And the data display device and the printing device are respectively arranged on the forklift cab bracket. The data display device is provided with a battery and a power interface, can supply power to the external and also can supply power to the battery, and can charge the battery when supplying power to the external. The tension and pressure transmitting and transmitting device consists of a tension and pressure transmitter, a wireless transmission module and a battery; the forklift weighing device weighs the weight of the goods on the fork teeth, outputs signals, transmits the signals to the tension and pressure transmitter, and the tension and pressure transmitter converts the signals into digital signals and transmits the digital signals to the data display device through the wireless transmission module.

The utility model has the positive effects that:

1. simple structure, easy processing and assembly and low cost.

2. The rolling friction of the bearing is utilized to reduce the friction coefficient, and the limiting block and the limiting bearing are matched, so that the vertical friction force generated when the forklift forks the goods to be weighed is reduced to the maximum extent, the offset of the vertical stress of the force sensor is reduced, and the weighing precision is high.

3. The design of bearing and bearing track size when guaranteeing to process portably, link plate keeps parallel when the atress around guaranteeing, weighs the accuracy.

4. The fork truck does not need to be modified, and the fork truck is arranged between the fork teeth and the door frame of the fork truck and a cab of the fork truck, so that the cost is saved.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic assembly diagram of a forklift truck weighing device according to one aspect of the utility model.

Fig. 2 is a schematic structural diagram of a forklift truck weighing device in one of the schemes of the utility model.

FIG. 3 is a schematic view of the structure of the forklift truck weighing device (with the front hanging plate removed) according to one of the aspects of the utility model

Wherein, 1 preceding link plate, 2 back link plates, 3 force sensor, 4 bearings, 5 bearing guide rails, 6 stopper, 7, spacing bearing.

Detailed Description

(example 1)

A forklift weighing device is shown in figure 1 and comprises a front hanging plate 1, a rear hanging plate 2 and a force sensor 3, wherein the front hanging plate 1 and the rear hanging plate 2 are steel plates and are 2cm thick; the upper and lower both ends of back link plate 2 are fixed mounting 4 bearing guide rails 5 respectively, and bearing guide rail 5 is square frame structure, the tail end and the 2 bolt fixed connection of back link plate of framework, and 4 bearing guide rails set up side by side, and its material is alloy steel, and its inner surface makes the surfacing to the surface finish machining after quenching promptly and makes the surfacing, and the surface hardness is 55 HRC. The circular bearing is installed inside the bearing guide rail through the shaft and the fixing block. Fixed mounting has 4 stopper 6 on the edge of preceding link plate 1 middle part, and stopper 6 is the steel sheet of bolted connection on link plate 1 plate body in the front, installs 4 and 6 assorted limit bearings of stopper on the edge of 2 middle parts of back link plate, and it is the bolt bearing, and back link plate 2 is gone up to open has the screw thread, and after the installation, all stoppers are in corresponding limit bearing's outside.

This embodiment fork truck weighing device force sensor 3 installs between preceding link plate 1 and back link plate 2, and its upper and lower both ends pass through rod end bearing respectively with preceding link plate 1, back link plate 2 fixed connection.

In the embodiment, bayonets protruding out of the plate body are respectively arranged at the top and the bottom of the rear hanging plate 2 and are used for being matched with protruding teeth and grooves at the lower part of a forklift gantry, 2 weighing devices are respectively arranged on the forklift gantry when the forklift gantry is used, and then two fork teeth of a forklift are respectively clamped on the forklift weighing device.

2 this embodiment fork truck weighing device, draw pressure to send transmission device, data display device, printing device, constitute the fork truck weighing system of this embodiment, fork truck weighing device's force transducer 3 with draw pressure to send transmission device data line to be connected, draw pressure to send transmission device by drawing pressure transmitter, bluetooth module, battery to constitute, install it outside fork truck weighing device and be connected with data display device bluetooth, data display device is connected with printing device data line. And the data display device and the printing device are respectively and fixedly arranged on the forklift cab bracket.

This embodiment during operation, with 2 weighing device joint respectively on the fork truck portal, then with the prong joint on the preceding link plate of weighing device again, whether the inspection installation is appropriate, then start fork truck, insert the tray that the loading has the heavy object with the prong, the lifting prong, alright reading goods weight, when needing to print, the printing weighing result.

The results of the multiple measurements of the standard weight in this example are as follows:

serial number	Standard weight (kg)	Reading of the embodiment (kg)	Error rate (‰)
				1	100	100	--
2	500	499	2
				3	1000	1001	1
4	2000	2001	0.5
				5	3000	3002	0.7

(example 2)

The difference between this example and example 1 is: the preceding link plate of this embodiment and back link plate thickness are 2.5cm, and the top and the bottom of link plate have the bayonet socket of protrusion plate body respectively before this embodiment, and force sensor is pressure sensor, and 6 bearings are installed respectively to the upper and lower both ends of preceding link plate. The upper and lower both ends of link plate are fixed mounting respectively has 6 bearing guide rails behind this embodiment, and 6 bearing guide rail surface hardness are 50 HRC.

The forklift weighing device comprises a front hanging plate, a rear hanging plate and a force sensor, wherein the front hanging plate and the rear hanging plate are steel plates, the thickness of the front hanging plate and the rear hanging plate is 2.5cm; the upper end and the lower end of the rear hanging plate are respectively and fixedly provided with 6 bearing guide rails which are of a rectangular frame structure, the tail end of the frame body is fixedly connected with the rear hanging plate through bolts, the 6 bearing guide rails are arranged side by side and made of alloy steel, the inner surface of the bearing guide rails is subjected to quenching treatment with the contact surface of the bearing guide rails, and the surface is subjected to finish machining after quenching to be smooth, and the surface hardness is 50 HRC. The circular bearing is installed inside the bearing guide rail through the shaft and the fixing block. Fixed mounting has 4 stopper 6 on the edge of preceding link plate middle part, and stopper 6 is the steel sheet of bolted connection on preceding link plate body, installs 4 and 6 assorted limit bearings of stopper on the edge of back link plate middle part, and it is bolted bearing, and it is threaded to open on the back link plate, and after the installation, all stoppers are in corresponding limit bearing's outside.

This embodiment fork truck weighing device force sensor installs between preceding link plate and back link plate, and its upper and lower both ends pass through rod end bearing respectively with preceding link plate, back link plate fixed connection.

In the embodiment, the top and the bottom of the front hanging plate are respectively provided with bayonets protruding out of the plate body and used for being matched with the convex teeth and the grooves at the lower part of the forklift gantry, 2 weighing devices are respectively arranged on the forklift gantry when the forklift gantry is used, and then two fork teeth of a forklift are respectively clamped on the forklift weighing device.

1 fork truck weighing device of this embodiment, draw pressure to send transmission device, data display device, printing device, constitute the fork truck weighing system of this embodiment, fork truck weighing device's force transducer and draw pressure to send transmission device data line connection, draw pressure to send transmission device by drawing pressure transmitter, wireless transmission module, the battery is constituteed, install in the fork truck weighing device outside, it and data display device wireless connection, data display device and printing device data line connection, data display device, printing device respectively fixed mounting is on fork truck driver's cabin support.

This embodiment during operation, with 1 platform weighing device joint on the fork truck portal, then with the prong joint on weighing device's preceding link plate, whether the inspection installation is appropriate, then start fork truck, insert the tray that the loading has the heavy object with the prong, the lifting prong, alright reading goods weight, print the weighing result.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a fork truck weighing device, includes preceding link plate (1), back link plate (2), force sensor (3), its characterized in that: the upper end and the lower end of the front hanging plate (1) are respectively provided with a bearing (4); the upper end and the lower end of the rear hanging plate (2) are respectively and fixedly provided with a bearing guide rail (5); a limiting block (6) is fixedly arranged on the front hanging plate (1), and a limiting bearing (7) matched with the limiting block (6) is arranged on the rear hanging plate (2); the force sensor (3) is arranged between the front hanging plate (1) and the rear hanging plate (2), and the upper end and the lower end of the force sensor are respectively fixedly connected with the front hanging plate (1) and the rear hanging plate (2).

2. The forklift weighing device of claim 1, wherein: the number of the bearings (4) is 1 or more; the number of the bearing guide rails (5) is consistent with that of the bearings (4), and the bearing guide rails (5) are of square frame structures.

3. The forklift weighing device of claim 1, wherein: the number of the bearings (4) and the number of the bearing guide rails (5) are respectively 4, and the bearings (4) are needle roller bearings.

4. The forklift weighing device of claim 1, wherein: the top and the bottom of the rear hanging plate (2) are respectively provided with bayonets protruding out of the plate body.

5. The forklift weighing device of claim 4, wherein: the force sensor (3) is a tension sensor.

6. The forklift weighing device of claim 1, wherein: the top and the bottom of the front hanging plate (1) are respectively provided with bayonets protruding out of the plate body.

7. The forklift weighing device of claim 6, wherein: the force sensor (3) is a pressure sensor.

8. A fork truck weighing system which characterized in that: the forklift weighing device comprises the forklift weighing device, the tension and pressure transmitting and transmitting device, the data display device and the printing device according to any one of claims 1 to 7, wherein a force sensor (3) of the forklift weighing device is connected with a tension and pressure transmitting and transmitting device data line, the tension and pressure transmitting and transmitting device is in wireless transmission connection with the data display device, and the data display device is connected with the printing device data line.

9. The forklift weighing system of claim 8, wherein: the forklift weighing system is characterized in that the number of the forklift weighing devices in the forklift weighing system is two, and the forklift weighing devices are movably clamped on a forklift gantry.