Load cell assembly and dynamic automatic weighing scale including the same

Abstract

The present invention provides a weighing sensor assembly and a dynamic automatic weighing scale including the same. The weighing sensor assembly includes a sensor upper support plate, a separable housing, a weighing sensor, a sensor lower support plate, and a motor cable. The upper end of the separable housing is fixedly connected to the sensor upper support plate, and the lower end of the separable housing is fixedly connected to the sensor lower support plate. The weighing sensor is fixed within the separable housing; the upper part of one end of the weighing sensor is connected to the sensor upper support plate, and the lower part of the other end is connected to the sensor lower support plate; the motor cable passes through the upper part of the separable housing and exits from the lower part, and the part of the motor cable located within the separable housing is a separable cable, and there is always a gap between the separable cable and the weighing sensor and they are separated. The present invention states that through the embedded housing structure design, the interference of environmental factors such as external dust and air flow on the sensor is reduced, and the protection level of the sensor is improved.

Description

Technical Field

[0001] The present invention relates to the field of electronic scales, and particularly to a weighing sensor assembly and a dynamic automatic weighing scale including the same. Background Art

[0002] In the prior art, a dynamic automatic weighing scale mainly consists of a tabletop assembly, a driving assembly, a sensor assembly, an electric control box, a tabletop support assembly, and a frame. The device is mainly used to detect whether the weight of products on the production line is qualified, that is, whether the weight of the products is within the corresponding accuracy range. By identifying the weight through the system and judging unqualified products, unqualified product processing is carried out.

[0003] Currently, the dynamic automatic weighing scale with this structure has the following deficiencies:

[0004] First, due to the limitations of the structure itself, the strain gauge sensor cannot solve the stress interference on the sensor caused by the internal stress of the motor cable.

[0005] Second, strain gauge sensors are usually external type, and are prone to adhering dust or other tiny impurities. Over time, it will interfere with the weighing of the sensor, and even make it impossible to weigh and calibrate the weight normally.

[0006] Third, the motor cable is usually fixed at a certain position, and the assembly process cannot be solidified, and the assembly method will also affect the cable.

[0007] In view of this, those skilled in the art have improved the structure of the strain gauge sensor in order to overcome the above technical problems. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the dynamic automatic weighing scale cannot solve the stress interference on the sensor caused by stress, is prone to adhering dust or other tiny impurities, and cannot solidify the assembly process, and to provide a weighing sensor assembly and a dynamic automatic weighing scale including the same.

[0009] The present invention solves the above technical problems through the following technical solutions:

[0010] A weighing sensor assembly, characterized in that the weighing sensor assembly includes a sensor upper support plate, a split housing, a weighing sensor, a sensor lower support plate, and a motor cable. The upper end of the split housing is fixedly connected to the sensor upper support plate, the lower end of the split housing is fixedly connected to the sensor lower support plate, and the weighing sensor is fixed inside the split housing;

[0011] The upper part of one end of the weighing sensor is connected to the sensor upper support plate, and the lower part of the other end is connected to the sensor lower support plate;

[0012] The motor cable passes through the upper part of the separable housing and exits from the lower part, and the part of the motor cable located within the separable housing is a separable cable, with a gap always existing between the separable cable and the weighing sensor and they are separated from each other.

[0013] According to an embodiment of the present invention, the separable housing includes an upper separable housing and a lower separable housing. The upper separable housing is fixedly connected to the sensor upper support plate, and the lower separable housing is fixedly connected to the sensor lower support plate. The upper separable housing and the lower separable housing are docked up and down to form a closed cavity structure.

[0014] According to an embodiment of the present invention, an installation groove is provided on the upper end surface of the upper separable housing, and the installation groove is located directly above the weighing sensor;

[0015] A first sensor gasket is provided on the upper part of one end of the weighing sensor, and the first sensor gasket is connected to the sensor upper support plate.

[0016] According to an embodiment of the present invention, the lower separable housing surrounds the outer side surface of the sensor lower support plate. A second sensor gasket is provided on the lower part of the other end of the weighing sensor, and the second sensor gasket is connected to the sensor lower support plate.

[0017] According to an embodiment of the present invention, the upper separable housing is enclosed by an upper end surface, a first set of front and rear surfaces, and a first side surface to form an open shell structure. The lower separable housing is enclosed by a top surface, a second set of front and rear surfaces, and a second side surface to form an open shell structure. The upper separable housing and the lower separable housing are buckled and connected up and down.

[0018] According to an embodiment of the present invention, the second set of front and rear surfaces of the lower separable housing are trapezoidal surfaces, and the top surface is connected between the second set of front and rear surfaces;

[0019] A card slot is respectively provided at the connection of the second set of front and rear surfaces and the top surface;

[0020] The width of the upper separable housing is greater than or equal to the width of the lower separable housing. The upper separable housing is buckled outside the lower separable housing, and the upper end surface of the upper separable housing is clamped in the corresponding card slot.

[0021] According to an embodiment of the present invention, a first cable clamping device is provided on the upper part of the upper separable housing, and a second cable clamping device is provided on the lower part of the lower separable housing. The motor cable passes through the first cable clamping device and exits from the second cable clamping device;

[0022] The initial section of the motor cable is located outside the first cable clamping device, and the terminal section of the motor cable is located outside the second cable clamping device.

[0023] According to an embodiment of the present invention, a third cable clamping device is further provided on the lower separable housing, and the sensor cable of the weighing sensor passes through the third cable clamping device.

[0024] According to an embodiment of the present invention, at least one positioning member is provided on the upper part of the inner wall surface of the separable housing, and the separable cable is fixed in the separable housing through the positioning member.

[0025] The present invention also provides a dynamic automatic weighing scale, characterized in that the dynamic automatic weighing scale includes the weighing sensor assembly as described above.

[0026] The positive and progressive effects of the present invention are as follows:

[0027] The weighing sensor assembly of the present invention and the dynamic automatic weighing scale including the same adopt a new sensor housing structure. Through the embedded housing structure design, the interference of environmental factors such as external dust and air flow on the sensor is reduced, and the protection level of the sensor is improved. At the same time, it also makes the sensor components easier to maintain.

[0028] By adopting a separable housing connection method, the interference of the internal stress of the motor cable itself and the external stress on the terminal cable is isolated, reducing the interference of the internal stress of the motor cable and the external cable on the weighing detection, thereby greatly improving the static weighing performance of the sensor and the stability of the dynamic weighing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0030] Figure 1 is an exploded schematic view of the weighing sensor assembly of the present invention Figure 1 .

[0031] Figure 2 is an exploded schematic view of the weighing sensor assembly of the present invention Figure 2 .

[0032] Figure 3 is a front view of the exploded weighing sensor assembly of the present invention.

[0033] Figure 4 is a side view of the exploded weighing sensor assembly of the present invention.

[0034] Figure 5 This is a schematic structural view of the upper separable housing in the weighing sensor assembly of the present invention.

[0035] Figure 6 This is a schematic structural view of the lower separable housing in the weighing sensor assembly of the present invention.

[0036] Figure 7 This is a top view of the disassembled weighing sensor assembly of the present invention.

[0037] Figure 8 This is a front view of the assembled weighing sensor assembly of the present invention.

[0038] Figure 9 This is a schematic structural view of the dynamic automatic weighing scale of the present invention.

[0039] Figure 10 This is an installation schematic diagram of the weighing sensor in the dynamic automatic weighing scale of the present invention.

[0040]

Reference Signs

[0041] Upper support plate of sensor 10

[0042] Weighing sensor 20

[0043] Lower support plate of sensor 30

[0044] Motor cable 40

[0045] Separable cable 41

[0046] Upper separable housing 50

[0047] Lower separable housing 60

[0048] Installation groove 51

[0049] First sensor gasket 21

[0050] Second sensor gasket 22

[0051] Upper end face 52

[0052] First front surface 53

[0053] First rear surface 54

[0054] First side surface 55

[0055] Top surface 61

[0056] Second front surface 62

[0057] Second rear surface 63

[0058] Second side enclosure 64

[0059] Card slot 65

[0060] First cable clamping device 56

[0061] Second cable clamping device 66

[0062] Initial section motor cable 42

[0063] Final section motor cable 43

[0064] Third cable clamping device 67

[0065] Sensor cable 23

[0066] Motor 70

[0067] Input table assembly 100

[0068] Weighing table assembly 200

[0069] Output table assembly 300

[0070] Input table support beam 110

[0071] Output table support beam 310

[0072] Frame assembly 400

[0073] Support foot 500

[0074] Electric control box 600

[0075] Optoelectronic assembly 700

[0076] Conveyor table support assembly 800

[0077] Load cell assembly 900 Detailed implementation manners

[0078] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention is provided in conjunction with the accompanying drawings.

[0079] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the present invention will now be described in detail, and examples thereof are shown in the drawings. Whenever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.

[0080] In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein.

[0081] In addition, the present invention is to be understood not only by the actual terms used, but also by the meaning implied by each term.

[0082] Figure 1 Exploded schematic of the load cell assembly of the present invention Figure 1 。 Figure 2 Exploded schematic of the load cell assembly of the present invention Figure 2 。 Figure 3 Front view of the exploded load cell assembly of the present invention. Figure 4 Side view of the exploded load cell assembly of the present invention. Figure 5 Structural schematic of the upper separable housing of the load cell assembly of the present invention. Figure 6 Structural schematic of the lower separable housing of the load cell assembly of the present invention. Figure 7 Top view of the exploded load cell assembly of the present invention.

[0083] As Figures 1 to 7 shown, the present invention discloses a load cell assembly, which includes a sensor upper support plate 10, a separable housing, a load cell 20, a sensor lower support plate 30, and a motor cable 40. Among them, the upper end of the separable housing is fixedly connected to the sensor upper support plate 10, the lower end of the separable housing is fixedly connected to the sensor lower support plate 30, and the load cell 20 is fixed inside the separable housing. The upper part of one end of the load cell 20 is connected to the sensor upper support plate 10, and the lower part of the other end is connected to the sensor lower support plate 30. The motor cable 40 passes through the upper part of the separable housing and exits from the lower part, and the part of the motor cable 40 located inside the separable housing is a separable cable 41, and there is always a gap between the separable cable 41 and the load cell 20 and they are separated.

[0084] Of course, in order to further ensure that the separable cable 41 and the load cell 20 never come into contact to avoid interference, at least one positioning member can be preferably provided on the upper part of the inner wall surface of the separable housing to fix the separable cable 41 in the separable housing through the positioning member (not shown in the figure). Here, the separable cable 41 is formed by peeling the motor cable 40 and is loosely installed in the separable housing, so that the interference between the cables can be reduced. The separable cable 41 is completely enclosed in the separable housing and separated from the load cell 20, and will not have any influence on the load cell 20 or cause any pressure on the load cell 20.

[0085] Preferably, in this embodiment, the split housing includes an upper split housing 50 and a lower split housing 60. The upper split housing 50 is fixedly connected to the upper support plate 10 of the sensor, and the lower split housing 60 is fixedly connected to the lower support plate 30 of the sensor. The upper split housing 50 and the lower split housing 60 are docked up and down to form a closed cavity structure.

[0086] Further, an installation groove 51 is provided on the upper end surface of the upper split housing 50, and the installation groove 51 is located directly above the weighing sensor 20. A first sensor gasket 21 is provided on the upper part of one end of the weighing sensor 20, and the first sensor gasket 21 is connected to the upper support plate 10 of the sensor. The lower split housing 60 surrounds the outer side surface of the lower support plate 30 of the sensor. A second sensor gasket 22 is provided on the lower part of the other end of the weighing sensor 20, and the second sensor gasket 22 is connected to the lower support plate 30 of the sensor.

[0087] Particularly, in this embodiment, the upper split housing 50 is preferably an open shell structure surrounded by an upper end surface 52, a first set of front and rear surfaces (including a first front surface 53 and a first rear surface 54), and a first side surface 55. The lower split housing 60 is an open shell structure surrounded by a top surface 61, the second set of front and rear surfaces (including a second front surface 62 and a second rear surface 63), and a second side surface 64. The upper split housing 50 and the lower split housing 60 are snap-connected up and down.

[0088] Here, the second set of front and rear surfaces (including the second front surface 62 and the second rear surface 63) of the lower split housing 60 are preferably trapezoidal surfaces, and the top surface 61 is connected between the second set of front and rear surfaces (including the second front surface 62 and the second rear surface 63). A card slot 65 is provided at the connection between the second set of front and rear surfaces (including the second front surface 62 and the second rear surface 63) and the top surface 61 respectively.

[0089] In order to make the connection between the upper and lower housings more firm and stable, the width of the upper split housing 50 is preferably set to be greater than or equal to the width of the lower split housing 60. The upper split housing 50 is buckled outside the lower split housing 60, and the upper end surface 52 of the upper split housing 50 is clamped in the corresponding card slot 65.

[0090] In addition, a first cable clamping device 56 is provided at the upper part of the upper separable housing 50, and a second cable clamping device 66 is provided at the lower part of the lower separable housing 60. The motor cable 40 is inserted through the first cable clamping device 56 and passes out through the second cable clamping device 66. The initial section of the motor cable 40, i.e., the motor cable 42, is located outside the first cable clamping device 56, and the end section of the motor cable 40, i.e., the motor cable 43, is located outside the second cable clamping device 66. A third cable clamping device 67 is also provided on the lower separable housing 60, and the sensor cable 23 of the weighing sensor 20 passes out through the third cable clamping device 67.

[0091] According to the above structural description, the weighing sensor assembly of the present invention adopts a separable housing form. For example, the upper separable housing 50 is fixed below the sensor upper support plate 10. By placing the motor 70, the initial section of the motor cable 42, and the upper separable housing 50 above the weighing sensor 20, it is ensured that the internal stress of the initial section of the motor cable 42 between the motor 70 and the upper separable housing 50 does not cause any interference to the weighing sensor 20.

[0092] Similarly, the lower separable housing 60 is fixed on the sensor lower support plate 30 and does not contact the weighing sensor 20. The internal cables are separated and always kept in a loose state. The two ends of the separable cable 41 are fixed by the first cable clamping device 56 and the second cable clamping device 66 to ensure that the end section of the motor cable 43 does not interfere with the separable cable 41 inside the housing, and thus does not interfere with the initial section of the motor cable 42 either. Finally, the accuracy and stability of the weighing of the weighing sensor are ensured.

[0093] Figure 8 This is the front view of the weighing sensor assembly of the present invention after assembly.

[0094] As Figure 8 shown, since any external substance or airflow interference that may cause deformation or pressure to the weighing sensor will affect the weighing result of the weighing sensor, through the embedded structure design of the separable housing, the weighing sensor assembly of the present invention fixes the lower separable housing 60 on the sensor lower support plate 30, so that the lower separable housing 60 neither contacts the upper separable housing 50 nor has stress contact with the weighing sensor 20, enabling this type of external weighing sensor to be free from interference by external dust, particles or wind.

[0095] The setting of the separable housing not only protects the sensor but also keeps external dust and particulate matter outside the housing, improving the long-term weighing stability of the weighing sensor, the reliability of sensor calibration, and the convenience of daily cleaning and maintenance.

[0096] Figure 9 This is a schematic structural diagram of the dynamic automatic weighing scale of the present invention. Figure 10 This is a schematic installation diagram of the weighing sensor in the dynamic automatic weighing scale of the present invention.

[0097] As Figure 9 and Figure 10 shown, the present invention also provides a dynamic automatic weighing scale, characterized in that the dynamic automatic weighing scale includes the weighing sensor assembly as described above.

[0098] Specifically, the dynamic automatic weighing scale of the present invention mainly includes the following components: an input table assembly 100, a weighing table assembly 200, an output table assembly 300, a weighing sensor assembly 900, an input table support beam 110, an output table support beam 310, a frame assembly 400, support feet 500, an electric control box 600, an optoelectronic assembly 700, and a conveying table support assembly 800. Here, the weighing sensor assembly 900 adopts the weighing sensor assembly of the present invention as described above.

[0099] Among them, the table assemblies (input table assembly 100, output table assembly 300) also include moving components such as rollers, motors, belts, synchronous belts, etc. and other fixed components, which are mainly responsible for the stable conveying and transition of products. The table support members mainly support the table assemblies and ensure the structural stability of the table assemblies.

[0100] The weighing sensor assembly is the weighing sensor assembly as described above, which is fixed on the frame assembly 400, and the weighing table assembly 200 is fixed and installed on the sensor assembly, mainly responsible for detecting the weight of the product in the dynamic conveying state. The input table support beam 110 and the output table support beam 310 are fixed at both ends of the frame and are used to support the entire input and output tables and the support adjustment components.

[0101] The frame assembly 400 is used to support components such as the table assembly and the sensor components to ensure the structural stability of the whole machine. The support feet 500 are used to fix the frame and adjust the height of the whole machine. The electric control box 600 is responsible for the control of the whole machine and the transmission of signals. The optoelectronic assembly 700 is used to confirm this product and detect the product length. The conveying table support assembly 800 is mainly used to fix and support the input and output tables on both sides, and at the same time adjust the position of the table in the conveying direction and the height direction.

[0102] In the weighing sensor of the present invention, the initial section motor cable 42 is connected to the motor 70, the end motor cable 43 is connected to the electric control box 600, and the sensor cable 23 is connected to the electric control box 600 to transmit the sensor signal to the electric control box 600. The whole weighing sensor is fixed to the frame assembly 400, and the weighing table assembly 200 is fixed and installed on the weighing sensor to form the weighing part of the dynamic automatic weighing scale.

[0103] According to the above description, the weighing sensor assembly of the present invention and the dynamic automatic weighing scale including the same have the following advantages:

[0104] 1. Adopting a split motor cross-bridge structure to improve weighing accuracy and its stability;

[0105] 2. Reducing the interference of motor cables on the static performance of the sensor (zero drift);

[0106] 3. Improving the protection performance of the sensor components and reducing the interference of dust and particles on the sensor;

[0107] 4. The external cover structure design is easy to clean and maintain, and at the same time improves the appearance problems of the sensor and motor cables.

[0108] In summary, the weighing sensor assembly of the present invention and the dynamic automatic weighing scale including the same adopt a new sensor cover structure. Through the embedded cover structure design, the interference of environmental factors such as external dust and air flow on the sensor is reduced, and the protection level of the sensor is improved. At the same time, it also makes the sensor components easier to maintain.

[0109] Adopting a split cover connection method isolates the interference of the internal stress of the motor cable itself and the external stress on the end cable, reduces the interference of the internal stress of the motor cable and the external cable on the weighing detection, and thus greatly improves the static weighing performance of the sensor and the stability of the dynamic weighing accuracy.

[0110] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples. The protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A weighing sensor assembly, characterized in that, The weighing sensor assembly includes a sensor upper support plate, a split housing, a weighing sensor, a sensor lower support plate, and a motor cable. The upper end of the split housing is fixedly connected to the sensor upper support plate, the lower end of the split housing is fixedly connected to the sensor lower support plate, and the weighing sensor is fixed within the split housing; One upper part of the weighing sensor is connected to the sensor upper support plate, and the other lower part is connected to the sensor lower support plate; The motor cable passes through the upper part of the split housing and exits from the lower part. The part of the motor cable within the split housing is a split cable, and there is always a gap and separation between the split cable and the weighing sensor; The split housing includes an upper split housing and a lower split housing. The upper split housing is fixedly connected to the sensor upper support plate, the lower split housing is fixedly connected to the sensor lower support plate, and the upper split housing and the lower split housing are butt-jointed up and down to form a closed cavity structure; The upper split housing includes a first cable clamping device, and the lower split housing includes a second cable clamping device. The motor cable passes through the first cable clamping device and exits from the second cable clamping device. The initial section of the motor cable is located outside the first cable clamping device, and the end section of the motor cable is located outside the second cable clamping device.

2. The weighing sensor assembly according to claim 1, wherein An installation groove is formed on the upper end surface of the upper split housing, and the installation groove is located directly above the weighing sensor; A first sensor gasket is provided on one upper part of the weighing sensor, and the first sensor gasket is connected to the sensor upper support plate.

3. The weighing sensor assembly according to claim 2, characterized in that, The lower split housing surrounds the outer side surface of the sensor lower support plate. A second sensor gasket is provided on the other lower part of the weighing sensor, and the second sensor gasket is connected to the sensor lower support plate.

4. The weighing sensor assembly according to claim 3, wherein The upper split housing is enclosed by an upper end surface, a first set of front and rear surfaces, and a first side surface to form an open shell structure. The lower split housing is enclosed by a top surface, a second set of front and rear surfaces, and a second side surface to form an open shell structure. The upper split housing and the lower split housing are snap-connected up and down.

5. The weighing sensor assembly according to claim 4, wherein, The second set of front and rear surfaces of the lower split housing are trapezoidal surfaces, and the top surface is connected between the second set of front and rear surfaces; A card slot is provided at the connection between each of the second set of front and rear surfaces and the top surface; The width of the upper split housing is greater than or equal to the width of the lower split housing. The upper split housing is buckled outside the lower split housing, and the upper end surface of the upper split housing is clamped in the corresponding card slot.

6. The weighing sensor assembly according to claim 1, characterized in that, A first cable clamping device is provided on the upper part of the upper split housing, and a second cable clamping device is provided on the lower part of the lower split housing.

7. The weighing sensor assembly according to claim 6, wherein A third cable clamping device is further provided on the lower split housing, and the sensor cable of the weighing sensor passes through the third cable clamping device.

8. The weighing sensor assembly according to claim 1, wherein, At least one positioning member is provided at the upper part of the inner wall surface of the separable housing, and the separable cable is fixed in the separable housing through the positioning member.

9. A dynamic automatic weighing scale, characterized in that, The dynamic automatic weighing scale includes the weighing sensor assembly according to any one of claims 1-8.

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