Weighing device

Abstract

The embodiment of the utility model relates to the technical field of food and medicine filling and sealing packaging, in particular to a weighing device which comprises an object placing platform, a weighing device and a weighing device. At least part of the weighing tool is arranged in the object placing through hole from the upper end opening of the object placing through hole; the weighing tool is provided with an object placing groove which is used for placing at least part of an object to be weighed, and the shape of the object placing groove is matched with at least part of the object to be weighed; the weighing scale is provided with a weighing abutting end which is located below the weighing tool and arranged opposite to the lower end of the weighing tool. When the object placing platform and the weighing scale are located at the first relative position, a distance is formed between the weighing scale and the weighing tool; and when the weighing tool and the object placing through hole are located at the second relative position, the weighing abutting end abuts against the lower end of the weighing tool, so that the weighing tool is separated from the wall surface of the object placing through hole. According to the weighing device provided by the embodiment of the invention, the damage probability of the weighing scale can be reduced in the weighing process, and meanwhile, the accuracy of a weighing result is improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of food and medicine filling and sealing packaging, in particular to a weighing device. BACKGROUND

[0002] Food and medicine filling and sealing packaging production usually includes first filling of filling and sealing containers, weighing of the filling and sealing containers, if the weighing is qualified, the filling and sealing containers can enter a sealing process without secondary filling, and if the weighing is unqualified, the filling and sealing containers need to enter the sealing process after secondary filling.

[0003] At present, when the filling and sealing containers are weighed, the filling and sealing containers are directly placed on a weighing scale for weighing. The weighing scale is a precision instrument, and the filling and sealing containers are directly placed on the weighing scale for weighing, which can easily cause damage to the weighing scale. In addition, due to different shapes of the filling and sealing containers, some filling and sealing containers cannot be stably placed on the weighing scale, and the weighing is often inaccurate. CONTENT OF THE UTILITY MODEL

[0004] The embodiment of the present application aims to provide a weighing device which can reduce the probability of damage to the weighing scale during weighing and improve the accuracy of the weighing result.

[0005] To solve the above problems, the embodiment of the present application provides a weighing device, which comprises: a placing platform having a placing through hole extending along a gravity direction; a weighing tool which is at least partially placed into the placing through hole from an upper port of the placing through hole and leaks out from a lower port of the placing through hole; the maximum cross-sectional area of the weighing tool in a direction perpendicular to the gravity direction is greater than the minimum cross-sectional area of the placing through hole in the direction perpendicular to the gravity direction; the weighing tool has a placing groove for placing at least part of an object to be weighed and the shape of the placing groove is consistent with at least part of the object to be weighed; and a weighing scale having a weighing abutting end which is located below the weighing tool and is arranged opposite to the lower end of the weighing tool; wherein the placing platform and the weighing scale are configured to be switched between a first relative position and a second relative position; when the placing platform and the weighing scale are in the first relative position, the weighing scale and the weighing tool have a spacing therebetween; and when the placing platform and the weighing scale are in the second relative position, the weighing abutting end abuts the lower end of the weighing tool, so that the weighing tool is separated from the wall surface of the placing through hole.

[0006] The weighing device provided by the embodiments of the present application can make the weighing device unable to pass through the object placing hole and separate from the object placing platform after the weighing device is placed in the object placing hole, by the fact that the maximum cross-sectional area of the weighing tool in the direction perpendicular to the gravity direction is greater than the minimum cross-sectional area of the object placing hole in the direction perpendicular to the gravity direction. The weighing tool has the object placing groove for placing at least part of the object to be weighed, and the shape of the object placing groove is consistent with at least part of the object to be weighed, so that the object to be weighed can be stably placed in the object placing groove, and the object to be weighed is prevented from moving relative to the object placing groove, thereby improving the accuracy of the weighing result when the object to be weighed is weighed. The object placing platform and the weighing scale are configured to be switched between a first relative position and a second relative position; when the object placing platform and the weighing scale are in the first relative position, the weighing scale and the weighing tool have a spacing therebetween; when the object placing platform and the weighing scale are in the second relative position, the weighing abutting end abuts the lower end of the weighing tool, so that the weighing tool is separated from the wall surface of the object placing hole. When the weighing scale is not used for weighing, the object placing platform and the weighing scale are in the first relative position, so that the weighing scale, the weighing tool and the object to be weighed are separated, thereby preventing the weighing scale from being in contact with the weighing tool and the object to be weighed for a long time, and reducing the probability of damage to the weighing scale. When the weighing scale is used for weighing, the object placing platform and the weighing scale are switched from the first relative position to the second relative position, so that the weighing abutting end abuts the lower end of the weighing tool, and the weighing tool is separated from the wall surface of the object placing hole, thereby allowing the weighing scale to be used for weighing the weighing tool and the object to be weighed. Since the weight of the weighing tool can be obtained in advance or removed in advance, the weight of the object to be weighed can be obtained.

[0007] In some embodiments, the object placing hole corresponds to a plurality of the weighing tools, wherein the object placing grooves of different weighing tools are different in shape to adapt to objects to be weighed of different shapes, and one of the plurality of the weighing tools is placed in the object placing hole corresponding thereto. In this way, when objects to be weighed of different shapes need to be weighed, the weighing tool adapted to the shape of the object to be weighed can be replaced, so that the object to be weighed can be stably weighed, and the adaptability of the weighing device is improved.

[0008] In some embodiments, the weighing tool comprises a mounting seat and an object placing jig; the mounting seat is at least partially placed in the object placing hole from the upper port of the object placing hole, and the lower end thereof leaks out from the lower port of the object placing hole; the object placing jig has the object placing groove; one mounting seat corresponds to a plurality of object placing jigs, wherein the object placing grooves of different object placing jigs are different in shape to adapt to objects to be weighed of different shapes, and one of the plurality of object placing jigs is detachably connected to the mounting seat corresponding thereto. In this way, when objects to be weighed of different shapes need to be weighed, the object placing jig adapted to the shape of the object to be weighed can be replaced, so that the object to be weighed can be stably weighed, and the adaptability of the weighing device is improved.

[0009] In some embodiments, the weighing tool comprises a mounting seat and a placement jig; the mounting seat comprises a placement part placed in the placement through hole and a placement part located outside the placement through hole, wherein the placement part and the placement part are integrally formed; the placement part has a placement hole extending along the gravity direction; at least part of the placement jig is placed in the placement hole to be detachably connected with the mounting seat. Based on the placement part being located outside the placement through hole, positioning can be facilitated to facilitate installation of the placement jig; meanwhile, the placement hole extending along the gravity direction can utilize the gravity to install the placement jig, so that convenient and rapid installation and removal of the placement jig can be realized.

[0010] In some embodiments, the mounting seat is provided with a weight reduction structure; the weight reduction structure comprises a first weight reduction hole provided on the wall of the placement hole, and a second weight reduction hole provided on the placement part; the second weight reduction hole is in communication with the placement hole. In this way, the weight reduction structure of the mounting seat can reduce the overall weight of the mounting seat to avoid the weighing scale from being adversely affected by the excessive weight of the mounting seat; since the first weight reduction hole is provided on the wall of the placement hole, it can be formed by milling, and since the second weight reduction hole is in communication with the placement hole, it can be formed by processing the bottom of the placement hole, so that the weight reduction holes can be easily processed even if the number of weight reduction holes is large.

[0011] In some embodiments, one of the lower end of the weighing tool and the weighing abutting end is provided with a positioning hole, and the other is provided with a positioning pin; when the placement platform and the weighing scale are in the second relative position, the positioning pin is placed in the positioning hole, and the weighing abutting end abuts against the lower end of the weighing tool. In this way, the accuracy of the weighing abutting end abutting against the weighing tool can be improved to ensure that the weighing scale weighs the weight of the weighing tool and the object to be weighed.

[0012] In some embodiments, the lower end of the weighing tool is provided with the positioning hole; the positioning hole is located below the second weight reduction hole and is in communication with the second weight reduction hole. In this way, the positioning hole can be easily processed and formed.

[0013] In some embodiments, the weighing device further comprises a lifting mechanism; the placement platform is located above the lifting mechanism and is configured to move along the gravity direction and the opposite direction of the gravity direction under the driving of the lifting mechanism, so that the placement platform and the weighing scale are configured to switch between the first relative position and the second relative position. In this way, the placement platform and the weighing scale can be switched between the first relative position and the second relative position without moving the weighing scale, so that the inaccuracy of weighing caused by moving the weighing scale can be avoided.

[0014] In some embodiments, the weighing device further comprises: a fixed plate; the weighing scale is fixed above the fixed plate; the object placing platform is located above the fixed plate; the lifting mechanism comprises: a movable rod, and a driver, a connecting piece and a tension spring located below the fixed plate; the movable rod penetrates through the fixed plate, and one end of the movable rod is connected to the object placing platform and the other end of the movable rod is connected to the connecting piece; the driver is fixed to the fixed plate, and a driving end of the driver is fixed to the connecting piece to drive the connecting piece and the movable rod to move in the direction of gravity; the tension spring is located between the fixed plate and the connecting piece, and one end of the tension spring is fixed to the fixed plate and the other end of the tension spring is fixed to the connecting piece, wherein the tension spring is configured to have a tension force to drive the connecting piece to move in the opposite direction of the direction of gravity when the object placing platform and the weighing scale are in the second relative position. In this way, the driving force for driving the connecting piece to move in the direction of gravity can be provided by the driver to switch the object placing platform and the weighing scale from the first relative position to the second relative position; when it is required to switch the object placing platform and the weighing scale from the second relative position to the first relative position, the connecting piece can be driven to move in the opposite direction of the direction of gravity by the driver or the tension force provided by the tension spring; due to the arrangement of the tension spring, the object placing platform and the weighing scale can be ensured to be in the first relative position when the driver cannot work or the equipment needs to be maintained, thereby avoiding the weighing scale from contacting the weighing tool and further reducing the probability of damage to the weighing scale.

[0015] In some embodiments, the weighing device further comprises: a limiting mechanism; the limiting mechanism is fixed to the fixed plate and has a first limiting piece located above the connecting piece and a second limiting piece located below the connecting piece; the connecting piece abuts against the first limiting piece when the object placing platform and the weighing scale are in the first relative position; and the connecting piece abuts against the second limiting piece when the object placing platform and the weighing scale are in the second relative position. In this way, the limiting of the limiting mechanism can avoid damage to the weighing scale caused by excessive movement of the object placing platform during measurement, and can ensure that the position of the object placing platform remains fixed when no weighing is required, thereby facilitating other mechanisms to take and place the objects to be weighed.

[0016] In some embodiments, the weighing device further comprises: a detection sensor; the detection sensor is used to detect whether the weighing tool is provided with the objects to be weighed at least when the object placing platform and the weighing scale are in the first relative position. In this way, it can be ensured that the weighing operation is only performed when the weighing tool has the objects to be weighed, and each weighing of the weighing scale is an effective weighing.

[0017] In some embodiments, the weighing scale comprises a weighing member and a weighing clamp; the weighing clamp has the weighing abutting end and is detachably connected to the weighing member.

[0018] In some embodiments, the insertion hole is configured in a frustum shape with a cross-sectional area gradually decreasing along the gravity direction; and the weighing tool is shaped to match the shape of the portion of the insertion hole. In this way, the weighing tool can be inserted into the insertion hole, and the weighing tool cannot be separated from the placement platform after being inserted into the insertion hole.

[0019] In some embodiments, the slot of the placement slot is chamfered. In this way, the object to be weighed can be easily placed into the placement slot. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structural schematic diagram of a weighing device provided by an embodiment of the present application is shown in the figure;

[0021] Figure 2 Another structural schematic diagram of a weighing device provided by an embodiment of the present application is shown in the figure;

[0022] Figure 3 A structural schematic diagram of a mounting seat provided by an embodiment of the present application is shown in the figure; Figure 2 A sectional view along A-A of the figure;

[0023] Figure 4 A structural schematic diagram of a mounting seat provided by an embodiment of the present application is shown in the figure;

[0024] Figure 5 A sectional view of a mounting seat provided by an embodiment of the present application is shown in the figure.

[0025] It should be noted that in each sectional view, the sectional line is not shown in order to more intuitively show the structures and the relative positional relationship between the structures.

[0026] In the figures, the reference signs are as follows:

[0027] A placement platform 110;

[0028] A weighing tool 120, a mounting seat 121, a placement jig 122, an insertion portion 123, a placement portion 124, a placement hole 125, a first weight-reducing hole 126, a second weight-reducing hole 127, and a positioning hole 128;

[0029] A weighing scale 130, a weighing abutting end 131, a positioning pin 132, a weighing member 133, and a weighing clamp 134;

[0030] A lifting mechanism 140, a movable rod 141, a driver 142, a connecting piece 143, and a tension spring 144;

[0031] A fixed plate 150 and a fixed column 151;

[0032] A limiting mechanism 160, a first limiting piece 161, and a second limiting piece 162;

[0033] detecting sensor 170, connecting piece 171;

[0034] object 210 to be weighed;

[0035] Gravity direction Z. DETAILED DESCRIPTION

[0036] At present, when the filled container is weighed, the filled container is directly placed on the weighing scale for weighing. The present inventor finds that: since the weighing scale is a precision instrument; directly placing the filled container on the weighing scale for weighing, the long-time contact of the filled container with the weighing scale is easy to cause damage to the weighing scale; in addition, since different filled containers have different shapes, part of the filled containers cannot be stably placed on the weighing scale, and when the weighing is performed, the filled container often moves relative to the weighing scale or even separates from the weighing scale, resulting in inaccurate weighing.

[0037] To this end, the present inventor designs a weighing device after in-depth research, which comprises: a placing platform having a placing through hole extending along the gravity direction; a weighing tool being at least partially placed into the placing through hole from the upper port of the placing through hole, and its lower end leaking out from the lower port of the placing through hole; the maximum cross-sectional area of the weighing tool in the direction perpendicular to the gravity direction is greater than the minimum cross-sectional area of the placing through hole in the direction perpendicular to the gravity direction; the weighing tool has a placing groove for placing at least part of the object to be weighed, and the shape of the placing groove is consistent with at least part of the object to be weighed; a weighing scale having a weighing abutting end located below the weighing tool and arranged opposite to the lower end of the weighing tool; wherein the placing platform and the weighing scale are configured to be switched between a first relative position and a second relative position; when they are in the first relative position, the weighing scale and the weighing tool have a spacing therebetween; when they are in the second relative position, the weighing abutting end abuts against the lower end of the weighing tool, so that the weighing tool is separated from the wall surface of the placing through hole.

[0038] The weighing device designed by the inventor of the present application can make the weighing device unable to pass through the object through hole and separate from the object platform after the weighing device is placed in the object through hole, by the fact that the maximum cross-sectional area of the weighing tool in the direction perpendicular to the gravity direction is greater than the minimum cross-sectional area of the object through hole in the direction perpendicular to the gravity direction. The weighing tool has an object placing groove for placing at least part of the object to be weighed, and the shape of the object placing groove is consistent with at least part of the object to be weighed, so that the object to be weighed can be more stably placed in the object placing groove, avoiding movement of the object to be weighed relative to the object placing groove, thereby improving the accuracy of the weighing result when the object to be weighed is weighed. The object platform and the weighing scale are configured to be switched between a first relative position and a second relative position; when the two are in the first relative position, the weighing scale and the weighing tool have a spacing therebetween; when the two are in the second relative position, the weighing abutting end abuts the lower end of the weighing tool, so that the weighing tool is separated from the wall surface of the object through hole. When the weighing scale is not used for weighing, the object platform and the weighing scale are in the first relative position, so that the weighing scale, the weighing tool and the object to be weighed are separated, avoiding long-time contact between the weighing scale, the weighing tool and the object to be weighed, thereby reducing the probability of damage to the weighing scale. When the weighing scale is used for weighing, the object platform and the weighing scale are switched from the first relative position to the second relative position, so that the weighing abutting end abuts the lower end of the weighing tool, and the weighing tool is separated from the wall surface of the object through hole, so that the weighing scale can be used to weigh the weighing tool and the object to be weighed. Since the weight of the weighing tool can be obtained in advance or removed in advance, the weight of the object to be weighed can be obtained.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, based on various changes and modifications of the following embodiments, the technical solutions claimed by the present application can also be implemented.

[0040] Reference is made to Figures 1 to 3The embodiment of the present application provides a weighing device, which comprises: a placing platform 110, which has a placing through hole extending along a gravity direction Z; a weighing tool 120, which is at least partially placed into the placing through hole through an upper port of the placing through hole and leaks out through a lower port of the placing through hole; the maximum cross-sectional area of the weighing tool 120 in a direction perpendicular to the gravity direction Z is greater than the minimum cross-sectional area of the placing through hole in the direction perpendicular to the gravity direction Z; the weighing tool 120 has a placing groove for placing at least part of an object to be weighed and the shape of the placing groove is consistent with at least part of the object to be weighed; and a weighing scale 130, which has a weighing abutting end 131 arranged below the weighing tool 120 and opposite to the lower end of the weighing tool 120; wherein the placing platform 110 and the weighing scale 130 are configured to switch between a first relative position and a second relative position; when the two are in the first relative position, the weighing scale 130 and the weighing tool 120 have a spacing; and when the two are in the second relative position, the weighing abutting end 131 abuts the lower end of the weighing tool 120, so that the weighing tool 120 is separated from the wall of the placing through hole.

[0041] In the embodiment of the present application, the upper port of the placing through hole refers to the opening at the upper end of the placing through hole, and the lower port of the placing through hole refers to the opening at the lower end of the placing through hole. The specific implementation mode of the present application that the lower end of the weighing tool 120 leaks out through the lower port of the placing through hole is not limited; in an embodiment, the lower end of the weighing tool 120 is located in the placing through hole and leaks out through the lower port of the placing through hole, at this time, when the weighing abutting end 131 abuts the lower end of the weighing tool 120, the weighing abutting end 131 can first pass through the lower port of the placing through hole and then abut the lower end of the weighing tool 120; in another embodiment, the lower end of the weighing tool 120 is flush with the lower port of the placing through hole, so as to achieve the effect that the lower end of the weighing tool 120 leaks out through the lower port of the placing through hole; in the embodiment, the lower end of the weighing tool 120 is located outside the placing through hole after passing through the lower port of the placing through hole, so as to achieve that the lower end of the weighing tool 120 leaks out through the lower port of the placing through hole.

[0042] The weighing device provided by the embodiments of the present application can make the weighing tool 120 unable to pass through the placement through hole and separate from the placement platform 110 after the weighing tool 120 is placed in the placement through hole, by the fact that the maximum cross-sectional area of the weighing tool 120 in the direction perpendicular to the gravity direction Z is greater than the minimum cross-sectional area of the placement through hole in the direction perpendicular to the gravity direction Z. The weighing tool 120 has a placement groove for placing at least part of the object to be weighed 210, and the shape of the placement groove is consistent with at least part of the object to be weighed 210, so that the object to be weighed 210 can be more stably placed in the placement groove, and movement of the object to be weighed 210 relative to the placement groove is avoided, thereby improving the accuracy of the weighing result when the object to be weighed 210 is weighed. The placement platform 110 and the weighing scale 130 are configured to be switchable between a first relative position and a second relative position; when the two are in the first relative position, the weighing scale 130 and the weighing tool 120 have a spacing therebetween; when the two are in the second relative position, the weighing abutting end 131 abuts the lower end of the weighing tool 120, so that the weighing tool 120 is separated from the wall surface of the placement through hole. In this way, when the weighing scale 130 is not required to weigh, the placement platform 110 and the weighing scale 130 are in the first relative position, so that the weighing scale 130, the weighing tool 120 and the object to be weighed 210 are separated, to avoid long-time contact between the weighing scale 130, the weighing tool 120 and the object to be weighed 210, thereby reducing the probability of damage to the weighing scale 130. When the weighing scale 130 is required to weigh, the placement platform 110 and the weighing scale 130 are switched from the first relative position to the second relative position, so that the weighing abutting end 131 abuts the lower end of the weighing tool 120, so that the weighing tool 120 is separated from the wall surface of the placement through hole, and the weighing scale 130 can be used to weigh the weighing tool 120 and the object to be weighed 210. Since the weight of the weighing tool 120 can be known in advance or removed in advance, the weight of the object to be weighed 210 can be obtained.

[0043] The embodiments of the present application do not limit the specific type of the object to be weighed 210, which can be a vial, a cartridge or the like. The embodiments of the present application are particularly suitable for the pre-filled needle of the object to be weighed 210 which is not easy to be stably placed, based on the fact that the embodiments of the present application have the weighing tool 120.

[0044] In some embodiments not shown in the drawings, one placement through hole corresponds to a plurality of weighing tools, wherein the placement grooves of different weighing tools are different in shape to adapt to different shapes of the object to be weighed, and one of the plurality of weighing tools is placed in the placement through hole corresponding thereto. In this way, when different shapes of the object to be weighed are required to be weighed, the weighing tool adapted to the shape of the object to be weighed can be replaced, so that the object to be weighed can be stably weighed, and the adaptability of the weighing device is improved.

[0045] Referring toFigures 1 to 5 In some embodiments, the weighing tool 120 comprises a mounting seat 121 and a placing jig 122; the mounting seat 121 is at least partially inserted into the placing through hole from the upper end of the placing through hole and leaks out from the lower end of the placing through hole; the placing jig 122 has the placing groove; one mounting seat 121 corresponds to a plurality of placing jigs 122, wherein the placing grooves of different placing jigs 122 are different in shape to adapt to different shapes of the to-be-weighed object 210, and one of the plurality of placing jigs 122 is detachably connected with the corresponding mounting seat 121. In this way, when different shapes of the to-be-weighed object 210 need to be weighed, the to-be-weighed object 210 can be stably weighed by replacing the placing jig 122 that is adapted to the shape of the to-be-weighed object 210, thereby improving the adaptability of the weighing device.

[0046] At this time, it can be understood that, since the mounting seat 121 is inserted into the placing through hole, the maximum cross-sectional area of the mounting seat 121 in the direction perpendicular to the gravity direction Z is greater than the minimum cross-sectional area of the placing through hole in the direction perpendicular to the gravity direction Z, so that after the weighing tool 120 is inserted into the placing through hole, the effect that the weighing tool 120 cannot pass through the placing through hole to separate from the placing platform 110 is achieved.

[0047] In some embodiments, the mounting seat 121 comprises an insertion part 123 inserted into the placing through hole and a placement part 124 located outside the placing through hole, wherein the insertion part 123 and the placement part 124 are integrally formed; the placement part 124 has a placement hole 125 extending along the gravity direction Z; at least part of the placing jig 122 is inserted into the placement hole 125 to be detachably connected with the mounting seat 121. Based on the placement part 124 being located outside the placing through hole, positioning is facilitated to facilitate installation of the placing jig 122; meanwhile, the placement hole 125 extending along the gravity direction Z utilizes the action of gravity to install the placing jig 122, which can achieve convenient and rapid installation and removal of the placing jig 122.

[0048] In some embodiments, the mounting seat 121 is provided with a weight reduction structure; the weight reduction structure comprises a first weight reduction hole 126 provided on the hole wall of the placement hole 125 and a second weight reduction hole 127 provided on the insertion part 123; the second weight reduction hole 127 communicates with the placement hole 125. In this way, the weight reduction structure of the mounting seat 121 can reduce the overall weight of the mounting seat 121 to avoid that the mounting seat 121 is too heavy to be weighed by the weighing scale 130; since the first weight reduction hole 126 is provided on the hole wall of the placement hole 125, it can be formed by milling, and since the second weight reduction hole 127 communicates with the placement hole 125, it can be formed by processing the hole bottom of the placement hole 125, so that the weight reduction holes can be easily processed even if the number of weight reduction holes is large.

[0049] In some embodiments, the density and structural strength of the mounting seat 121 are greater than those of the article mounting jig 122. Specifically, the density and structural strength of the mounting seat 121 can be greater than those of the article mounting jig 122 by using different materials for the mounting seat 121 and the article mounting jig 122, for example, the mounting seat 121 is made of metal material and the article mounting jig 122 is made of plastic material. In this way, the mounting seat 121 is not easily damaged when the weighing scale 130 reciprocally abuts against the mounting seat 121, and meanwhile, the molding of the article mounting groove of the article mounting jig 122 is facilitated.

[0050] In some embodiments, one of the lower end of the weighing tool 120 and the weighing abutting end 131 is provided with a positioning hole 128, and the other is provided with a positioning pin 132; when the article platform 110 and the weighing scale 130 are in the second relative position, the positioning pin 132 is placed in the positioning hole 128, and the weighing abutting end 131 abuts against the lower end of the weighing tool 120. In this way, the accuracy when the weighing abutting end 131 abuts against the weighing tool 120 can be improved to ensure that the weighing scale 130 weighs the weight of the weighing tool 120 and the article to be weighed 210, and the relative movement between the weighing abutting end 131 and the weighing tool 120 during the abutting process of the weighing abutting end 131 against the weighing tool 120 can be avoided.

[0051] It should be noted that the present application does not limit the specific implementation of the weighing abutting end 131 abutting against the weighing tool 120 after the positioning pin 132 is placed in the positioning hole 128; in an embodiment, the root of the positioning pin 132 is in the shape of a circular truncated cone, and the opening part of the positioning hole 128 is in the shape of a circular truncated cone that is matched with the shape of the root of the positioning pin 132, so that when the root of the positioning pin 132 contacts the opening part of the positioning hole 128, the effect of the weighing abutting end 131 abutting against the weighing tool 120 can be achieved.

[0052] In the present embodiment, the lower end of the weighing tool 120 is provided with the positioning hole 128. Preferably, the positioning hole 128 is located below the second weight reduction hole 127 and communicates with the second weight reduction hole 127. In this way, the processing and molding of the positioning hole 128 are facilitated.

[0053] In some embodiments, the weighing device further comprises a lifting mechanism 140; the article platform 110 is arranged above the lifting mechanism 140 and is configured to move along the gravity direction Z and the opposite direction of the gravity direction Z under the driving of the lifting mechanism 140, so that the article platform 110 and the weighing scale 130 are configured to switch between the first relative position and the second relative position.

[0054] Thus, the placement platform 110 and the weighing scale 130 are configured to switch between the first relative position and the second relative position without moving the weighing scale 130, thereby avoiding inaccurate weighing caused by moving the weighing scale 130.

[0055] It should be noted that in other embodiments not shown, the weighing scale can be moved to switch the placement platform and the weighing scale between the first relative position and the second relative position.

[0056] In some embodiments, the weighing device further comprises a fixed plate 150, the weighing scale 130 is fixed above the fixed plate 150, the placement platform 110 is located above the fixed plate 150, the lifting mechanism 140 comprises a movable rod 141 and a driver 142, a connecting piece 143, and a tension spring 144 located below the fixed plate 150, the movable rod 141 penetrates the fixed plate 150 and one end of the movable rod 141 is connected to the placement platform 110 and the other end of the movable rod 141 is connected to the connecting piece 143, the driver 142 is fixed to the fixed plate 150, a driving end of the driver 142 is fixed to the connecting piece 143 to drive the connecting piece 143 and the movable rod 141 to move along the gravity direction Z, and the tension spring 144 is located between the fixed plate 150 and the connecting piece 143, one end of the tension spring 144 is fixed to the fixed plate 150 and the other end of the tension spring 144 is fixed to the connecting piece 143, wherein the tension spring 144 is configured to have a tension force to drive the connecting piece 143 to move along the opposite direction of the gravity direction Z when the placement platform 110 and the weighing scale 130 are in the second relative position.

[0057] Thus, the driver 142 provides a driving force to drive the connecting piece 143 to move along the gravity direction Z to switch the placement platform 110 and the weighing scale 130 from the first relative position to the second relative position, and when it is needed to switch the placement platform 110 and the weighing scale 130 from the second relative position to the first relative position, the driver 142 drives the connecting piece to move along the opposite direction of the gravity direction Z or the tension spring 144 provides a tension force. Due to the arrangement of the tension spring 144, when the driver 142 cannot work or the equipment needs to be repaired, the placement platform 110 and the weighing scale 130 can be ensured to be in the first relative position, thereby avoiding the weighing scale 130 from contacting the weighing tool 120 and further reducing the probability of damage to the weighing scale 130.

[0058] In this embodiment, the fixing plate 150 can be fixed above the ground by the fixing column 151, so that the fixing plate 150 has a certain distance from the ground, which is beneficial to arrange the driver 142, the connecting piece 143, the tension spring 144 and other structures below the fixing plate 150.

[0059] In some embodiments, the weighing device further comprises a limiting mechanism 160; the limiting mechanism 160 is fixed with the fixing plate 150 and has a first limiting piece 161 above the connecting piece 143 and a second limiting piece 162 below the connecting piece 143; when the placing platform 110 and the weighing scale 130 are in the first relative position, the connecting piece 143 abuts against the first limiting piece 161; when the placing platform 110 and the weighing scale 130 are in the second relative position, the connecting piece 143 abuts against the second limiting piece 162. In this way, through the limiting of the limiting mechanism 160, on the one hand, when measuring, the excessive movement of the placing platform 110 can be avoided to cause damage to the weighing scale 130, and on the other hand, when not weighing, the position of the placing platform 110 can be ensured to remain fixed, which is beneficial to the operation of other mechanisms to take and place the to-be-weighed object 210.

[0060] In some embodiments, the weighing device further comprises a detection sensor 170; the detection sensor 170 is used to detect whether the weighing tool 120 is placed with the to-be-weighed object 210 at least when the placing platform 110 and the weighing scale 130 are in the first relative position. In this way, it can be ensured that the weighing operation (i.e. switching the placing platform 110 and the weighing scale 130 from the first relative position to the second relative position) is only performed when the weighing tool 120 is placed with the to-be-weighed object 210, so as to ensure that each weighing of the weighing scale 130 is effective weighing.

[0061] In an embodiment, the detection sensor 170 can be a reflection optical fiber sensor; a part of the to-be-weighed object 210 is placed in the placing groove of the weighing tool 120, and the other part of the to-be-weighed object 210 leaks out of the placing groove and is arranged to be just located on the optical fiber path of the reflection optical fiber sensor, so that the reflection optical fiber sensor can detect that the weighing tool 120 is placed with the to-be-weighed object 210.

[0062] In an embodiment, the detection sensor 170 can be fixed on the placing platform 110 by the connecting piece 171 to move together with the placing platform 110.

[0063] In other embodiments not shown in the figure, the position of the detection sensor is fixed, and only when the placing platform and the weighing scale are in the first relative position, it is detected whether the weighing tool is placed with the to-be-weighed object.

[0064] In some embodiments, the weighing scale 130 comprises a scale member 133 and a weighing clamp 134; the weighing clamp 134 has the weighing abutting end 131 and is detachably connected with the scale member 133.

[0065] In some embodiments, the insertion hole is configured in a frustum shape with a cross-sectional area gradually decreasing along the gravity direction Z; the shape of the part of the weighing tool 120 inserted into the insertion hole is adapted to the shape of the insertion hole. In this way, the weighing tool 120 can be easily inserted into the insertion hole, and at the same time, the weighing tool 120 cannot pass through the insertion hole to be separated from the object platform 110 after being inserted into the insertion hole.

[0066] In an embodiment, the shape of the insertion part 123 of the mounting seat 121 is adapted to the shape of the insertion hole.

[0067] In some embodiments, the slot of the object slot is provided with a chamfer. In this way, the object to be weighed 210 can be easily inserted into the object slot.

[0068] Those skilled in the art can understand that the above embodiments are specific examples for implementing the present application, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present application. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, therefore the protection scope of the present application should be limited by the scope defined in the claims.

Claims

1. A weighing device, characterized in that, include: A storage platform with a storage through-hole extending along the direction of gravity; A weighing fixture, at least partially inserted into the through-hole through its upper port, and its lower end protruding through the lower port of the through-hole; the maximum cross-sectional area of ​​the weighing fixture in the direction perpendicular to gravity is greater than the minimum cross-sectional area of ​​the through-hole in the direction perpendicular to gravity; the weighing fixture has a storage groove for placing at least a portion of the object to be weighed, and the shape of the groove matches at least a portion of the object to be weighed; A weighing scale having a weighing support end located below the weighing fixture and disposed opposite to the lower end of the weighing fixture; The placement platform and the weighing scale are configured to switch between a first relative position and a second relative position. When they are in the first relative position, there is a gap between the weighing scale and the weighing fixture. When they are in the second relative position, the weighing abutment end abuts against the lower end of the weighing fixture, thereby separating the weighing fixture from the wall of the placement through hole.

2. The weighing device according to claim 1, characterized in that, One of the aforementioned through holes corresponds to multiple of the aforementioned weighing fixtures, wherein the different weighing fixtures have different shapes of the placement grooves to accommodate objects of different shapes, and one of the multiple weighing fixtures is placed into the corresponding through hole. or, The weighing fixture includes a mounting base and a placement fixture; the mounting base is at least partially inserted into the placement through hole through its upper port, and its lower end protrudes through the lower port of the placement through hole; the placement fixture has the placement groove; one mounting base corresponds to multiple placement fixtures, wherein the placement grooves of different placement fixtures have different shapes to accommodate objects of different shapes, and one of the multiple placement fixtures is detachably connected to its corresponding mounting base.

3. The weighing device according to claim 1 or 2, characterized in that, The weighing fixture includes a mounting base and a jig for placing the object. The mounting base includes an insertion part that is inserted into the storage through hole and a placement part located outside the storage through hole, wherein the insertion part and the placement part are integrally formed. The placement part has a placement hole extending along the direction of gravity; at least a portion of the placement fixture is inserted into the placement hole for detachable connection with the mounting base.

4. The weighing device according to claim 3, characterized in that, The mounting base is provided with a weight reduction structure; the weight reduction structure includes a first weight reduction hole provided in the wall of the mounting hole, and a second weight reduction hole provided in the insertion part; The second weight-reducing hole is connected to the mounting hole.

5. The weighing device according to claim 1, characterized in that, The lower end of the weighing fixture and the weighing support end are provided with a positioning hole and a positioning pin, respectively. When the placing platform and the weighing scale are in the second relative position, the positioning pin is inserted into the positioning hole, and the weighing support end abuts against the lower end of the weighing fixture.

6. The weighing device according to claim 1, characterized in that, Also includes: Lifting mechanism; The placement platform is located on the lifting mechanism and is configured to move along the direction of gravity and the opposite direction of gravity under the drive of the lifting mechanism, so that the placement platform and the weighing scale can switch between the first relative position and the second relative position.

7. The weighing device according to claim 6, characterized in that, Also includes: Fixing plate; The weighing scale is fixed above the fixed plate; The storage platform is located above the fixed plate. The lifting mechanism includes: a movable rod and a driver, a connector, and a tension spring located below the fixed plate; the movable rod passes through the fixed plate, with one end connected to the placement platform and the other end connected to the connector; the driver is fixed to the fixed plate, and the driving end of the driver is fixed to the connector to at least drive the connector and the movable rod to move along the direction of gravity; the tension spring is located between the fixed plate and the connector, with one end fixed to the fixed plate and the other end fixed to the connector, wherein the tension spring is configured such that when the placement platform and the weighing scale are in the second relative position, the tension spring is in a stretched state and has a pulling force that drives the connector to move in the opposite direction of gravity.

8. The weighing device according to claim 7, characterized in that, Also includes: Limiting mechanism; The limiting mechanism is fixed to the fixing plate and has a first limiting member located above the connecting member and a second limiting member located below the connecting member; When the placing platform and the weighing scale are in the first relative position, the connecting member abuts against the first limiting member; When the placing platform and the weighing scale are in the second relative position, the connecting member abuts against the second limiting member.

9. The weighing device according to claim 1, characterized in that, Also includes: A detection sensor is used to detect whether the weighing fixture has an object to be weighed, at least when the platform and the weighing scale are in a first relative position.

10. The weighing device according to claim 1 or 2, characterized in that, The insertion through hole is configured as a frustum shape with a cross-sectional area that gradually decreases along the direction of gravity; the shape of the part of the weighing fixture used to insert into the insertion through hole is adapted to the shape of the insertion through hole; And / or, The opening of the storage slot is chamfered.

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