Limiting structure of weighing sensor

Abstract

The utility model discloses a weighing sensor limiting structure which comprises a bottom plate, a weighing sensor is installed on the bottom plate, a bearing plate is installed on the top of the weighing sensor, two lower supporting plates are symmetrically installed on the bottom plate and located on the two sides of the weighing sensor respectively, and transverse round through holes are formed in the front faces of the lower supporting plates. A round through hole is formed in the lower supporting plate, a rotatable cylinder is arranged in the round through hole, the length of the cylinder is equal to the front-back length of the lower supporting plate, blocking pieces are installed at the two ends of the cylinder, a limiting groove is formed in the cylinder, an inserting groove vertically communicated with the round through hole is formed in the upper face of the lower supporting plate, and an upper supporting plate capable of sliding up and down is arranged in the inserting groove. According to the weighing sensor limiting structure, the cylinder and the limiting block are arranged, the limiting groove is formed in the cylinder and matched with the limiting block, when the bearing plate is about to be overloaded, the bottom of the limiting groove can play a role in supporting the limiting block, the bearing plate is prevented from moving downwards again, and therefore the overload protection effect on the weighing sensor is achieved.

Description

Technical Field

[0001] This utility model relates to the field of weighing sensor technology, specifically a weighing sensor limiting structure. Background Technology

[0002] A load cell is a device used to measure the mass of an object. It can convert mass signals into measurable electrical signals and is widely used in industries such as industrial production, transportation, medical and health care, and commerce. The internal structure of a load cell is very delicate. Overloading during use or being subjected to unexpected heavy pressure during storage may affect the internal structure, leading to damage to the load cell or inaccurate weighing.

[0003] Therefore, we have designed a weighing sensor limiting structure here. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a weighing sensor limiting structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a weighing sensor limiting structure, including a base plate, a weighing sensor mounted on the base plate, a bearing plate mounted on the top of the weighing sensor, two lower support plates symmetrically mounted on the base plate, the two lower support plates being located on both sides of the weighing sensor, a transverse circular through hole opened in the front of the lower support plate, and a rotatable cylinder provided in the circular through hole, the length of the cylinder being the same as the front-to-back length of the lower support plate, and baffles installed at both ends of the cylinder, a limiting groove opened on the cylinder, a slot opening vertically through the circular through hole opened on the top of the lower support plate, and an upper support plate that can slide up and down is provided in the slot, the top of the upper support plate being fixed to the bearing plate, and a limiting block being installed on the bottom of the upper support plate.

[0006] Preferably, a positioning ring is installed on the front of the lower support plate, the axis of the cylinder coincides with the axis of the positioning ring, two vertically distributed positioning holes are opened on the front of the positioning ring, and the distance from the two positioning holes to the axis of the positioning ring is equal, a knob is installed on the baffle at the front end of the cylinder, and two round holes are opened behind the knob corresponding to the positions of the two positioning holes, and a positioning pin that can slide back and forth is provided in the round hole, and a spring is provided between the bottom of the round hole and the positioning pin.

[0007] Preferably, the depth of the limiting groove is less than or equal to the downward displacement distance of the bearing plate when the elastic element of the weighing sensor produces maximum elastic deformation.

[0008] Preferably, the vertical height of the limiting block is greater than the depth of the limiting groove, but less than the depth of the slot on the lower support plate.

[0009] Preferably, the lower part of the limiting block is provided with an arc groove, the radius of which is equal to the radius of the circular cross-section of the cylinder.

[0010] Preferably, the spring is always in a compressed state within the circular hole of the knob.

[0011] Preferably, the front of the knob is engraved with an arrow mark, and the orientation of the limiting groove is the same as the direction of the arrow mark.

[0012] Preferably, the positioning hole is a spherical hole, and the outward-facing end of the positioning pin is a spherical surface.

[0013] Compared with the prior art, the present invention provides a weighing sensor limiting structure, which has the following advantages:

[0014] This load cell limiting structure uses a cylinder and a limiting block. A limiting groove is cut on the cylinder to cooperate with the limiting block. When the load plate is about to be overloaded, the bottom of the limiting groove can support the limiting block, preventing the load plate from moving downwards. This provides overload protection for the load cell. When the load cell is not in use, the limiting groove faces downwards, and the arc surface of the cylinder can support the limiting block. When an object falls onto the load plate, it can prevent the load cell from being subjected to unexpected heavy pressure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a sectional view of the lower support plate of this utility model;

[0017] Figure 3 This is a schematic diagram of the upper support plate structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the positioning ring and knob of this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the knob of this utility model;

[0020] Figure 6 This is a schematic diagram showing the positional relationship between the arrow mark and the limiting groove of this utility model;

[0021] Figure 7 This is a schematic diagram of the no-load working state of this utility model;

[0022] Figure 8 This is a schematic diagram of the overload state of this utility model.

[0023] Figure 9 This is a schematic diagram of the non-working state of this utility model.

[0024] Reference numerals in the attached diagram: 1. Base plate; 2. Weighing sensor; 3. Bearing plate; 4. Lower support plate; 5. Cylinder; 5-1. Limiting groove; 6. Baffle; 7. Upper support plate; 8. Limiting block; 9. Positioning ring; 9-1. Positioning hole; 10. Knob; 10-1. Arrow mark; 11. Positioning pin; 12. Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-9 In this embodiment: a weighing sensor limiting structure includes a base plate 1, please refer to... Figures 1-3 A load cell 2 is mounted on a base plate 1. A support plate 3 is mounted on top of the load cell 2. Two lower support plates 4 are symmetrically mounted on the base plate 1, located on either side of the load cell 2. A transverse through hole is opened in the front of each lower support plate 4, and a rotatable cylinder 5 is installed inside the through hole. The length of the cylinder 5 is the same as the front-to-back length of the lower support plate 4, and baffles 6 are installed at both ends of the cylinder 5. A limiting groove 5-1 is opened on the cylinder 5, and the depth of the limiting groove 5-1 is less than or equal to that of the load cell. When the elastic element of 2 produces the maximum elastic deformation, the downward movement distance of the bearing plate 3 is as follows: The upper part of the lower support plate 4 has a slot that extends vertically to the circular through hole, and an upper support plate 7 that can slide up and down is provided in the slot. The upper part of the upper support plate 7 is fixed to the bearing plate 3, and a limiting block 8 is installed on the lower part of the upper support plate 7. The vertical height of the limiting block 8 is greater than the depth of the limiting groove 5-1, and less than the depth of the slot on the lower support plate 4. An arc groove is provided on the lower part of the limiting block 8, and the arc radius of the arc groove is equal to the circular cross-sectional radius of the cylinder 5.

[0027] Please see Figure 4 and Figure 5A positioning ring 9 is installed on the front of the lower support plate 4. The axis of the cylinder 5 coincides with the axis of the positioning ring 9. Two vertically distributed positioning holes 9-1 are opened on the front of the positioning ring 9, and the distance from the two positioning holes 9-1 to the axis of the positioning ring 9 is equal. A knob 10 is installed on the baffle 6 at the front end of the cylinder 5. Two round holes are opened on the back of the knob 10 corresponding to the positions of the two positioning holes 9-1. A positioning pin 11 that can slide back and forth is set in the round hole. A spring 12 is set between the bottom of the round hole and the positioning pin 11. The spring 12 is always in a compressed state in the round hole of the knob 10. The positioning hole 9-1 is a spherical hole, and the outer end of the positioning pin 11 is a spherical surface. The elastic force of the spring 12 can make the outer end of the positioning pin 11 engage with the positioning hole 9-1. When the knob 10 is rotated, the positioning pin 11 will be squeezed into the round hole of the knob 10 until the knob 10 is rotated 90 degrees, and then the positioning pin 11 will engage with the positioning hole 9-1 again.

[0028] Please see Figure 6 The knob 10 has an arrow mark 10-1 engraved on its front. The orientation of the limiting groove 5-1 is the same as the direction of the arrow mark 10-1. When the arrow mark 10-1 is pointing vertically upward or vertically downward, the positioning pin 11 is engaged with the positioning hole 9-1 on the positioning ring 9.

[0029] The arrow 10-1 indicates the working state when it points vertically upwards. When the support plate 3 is unloaded, as... Figure 7 As shown, the axis of the arc groove below the limiting block 8 coincides with the axis of the cylinder 5. After loading on the bearing plate 3, the elastic element of the load cell 2 will undergo elastic deformation, and the bearing plate 3 will move downward, thereby driving the upper support plate 7 and the limiting block 8 to move downward until the load reaches the maximum elastic deformation of the elastic element of the load cell 2. At this point, the limiting block 8 will contact the bottom of the limiting groove 5-1 of the cylinder 5. When the bearing plate 3 is overloaded, such as... Figure 8 As shown, the bottom of the limiting groove 5-1 will support the limiting block 8, restricting the bearing plate 3 from moving downward, thereby protecting the weighing sensor 2.

[0030] When the arrow marking 10-1 points vertically downwards, it is in a non-working state, such as... Figure 9 As shown, at this time, the arc surface of the cylinder 5 is located in the arc groove under the limiting block 8. When the bearing plate 3 is unloaded, the cylinder 5 can also support the limiting block 8. When the load cell 2 is not in use, if an object falls onto the bearing plate 3, the bearing plate 3 will not suddenly move downward, thereby avoiding the load cell 2 from being subjected to unexpected heavy pressure.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A weighing sensor limiting structure, characterized in that, The system includes a base plate (1), on which a load cell (2) is mounted. A support plate (3) is mounted on the top of the load cell (2). Two lower support plates (4) are symmetrically mounted on the base plate (1). The two lower support plates (4) are located on both sides of the load cell (2). A transverse circular hole is opened in the front of the lower support plate (4), and a rotatable cylinder (5) is set in the circular hole. The length of the cylinder (5) is the same as the front and rear length of the lower support plate (4), and the two ends of the cylinder (5) are... All are equipped with baffles (6), and the cylinder (5) has a limiting groove (5-1). The depth of the limiting groove (5-1) is less than or equal to the downward movement distance of the bearing plate (3) when the elastic element of the weighing sensor (2) produces the maximum elastic deformation. The upper part of the lower support plate (4) has a slot that extends vertically to the through hole, and an upper support plate (7) that can slide up and down is provided in the slot. The upper part of the upper support plate (7) is fixed to the bearing plate (3), and a limiting block (8) is installed on the lower part of the upper support plate (7).

2. The weighing sensor limiting structure according to claim 1, characterized in that: A positioning ring (9) is installed on the front of the lower support plate (4). The axis of the cylinder (5) coincides with the axis of the positioning ring (9). Two vertically distributed positioning holes (9-1) are opened on the front of the positioning ring (9), and the distance from the two positioning holes (9-1) to the axis of the positioning ring (9) is equal. A knob (10) is installed on the baffle (6) at the front end of the cylinder (5). Two round holes are opened on the back of the knob (10) corresponding to the positions of the two positioning holes (9-1), and a positioning pin (11) that can slide back and forth is provided in the round hole. A spring (12) is provided between the bottom of the round hole and the positioning pin (11).

3. The weighing sensor limiting structure according to claim 1, characterized in that: The vertical height of the limiting block (8) is greater than the depth of the limiting groove (5-1) and less than the depth of the slot on the lower support plate (4).

4. The weighing sensor limiting structure according to claim 1, characterized in that: The limiting block (8) has an arc groove on its lower part, and the radius of the arc groove is equal to the radius of the circular cross section of the cylinder (5).

5. A weighing sensor limiting structure according to claim 2, characterized in that: The spring (12) is always in a compressed state within the round hole of the knob (10).

6. The weighing sensor limiting structure according to claim 2, characterized in that: The knob (10) has an arrow mark (10-1) engraved on the front, and the limiting groove (5-1) is oriented in the same direction as the arrow mark (10-1).

7. A weighing sensor limiting structure according to claim 2, characterized in that: The positioning hole (9-1) is a spherical hole, and the outward-facing end of the positioning pin (11) is a spherical surface.

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