Column weighing module

Abstract

A column weighing module includes a column sensor, an upper pressure head, and a base, characterized in that: a lower connecting plate is fixed to the lower end of the base, an inverted U-shaped piece is fixed to the lower connecting plate, which can limit the 360-degree swing of the column sensor in the front, back, left, and right directions; a square hole is opened at the center of the upper end face of the inverted U-shaped piece; the upper end of the column sensor is formed with a square block structure with four cut edges that matches the square hole; the lower end of the column sensor is set on the base, and the upper end passes through the square hole of the inverted U-shaped piece to abut against the upper pressure head; a protective sealing ring is installed at the square hole of the inverted U-shaped piece. The present invention has a simple and reliable structure, is easy to process, and has low cost, and can be quickly installed. Anti-fall and anti-overturning devices are provided in all directions to limit the horizontal lateral force and eccentric loads in all directions on the module, effectively preventing the sensor from swinging too much and the weighing platform from overturning, and can easily replace the existing double shear beam sensor.

Description

Technical Field

[0001] The present invention relates to a weighing device, in particular to a column weighing module, which is suitable for electronic weighing equipment such as electronic truck scales, track scales, and tank scales. Background Art

[0002] Currently, column load cells are widely used in various electronic weighing equipment, including truck scales, track scales, axle load scales, and tank scales. Column load cells typically consist of upper and lower load cells, upper and lower mounting plates, lateral tie rods, and other connecting components. Column load cells offer a compact structure, stable and reliable performance, and excellent dynamic response, making them ideal for high-precision sensors.

[0003] For example, the Chinese utility model patent, "Column-Type Load Cell," with patent number ZL200420020485.2, includes a column-type elastic body with resistance strain gauges fixed to its surface. These strain gauges form a Whittings bridge to output a voltage signal that varies with weight. A protective sleeve is fixed to the outside of the column-type elastic body. The column-type elastic body has an aspect ratio of 2.5 to 4, and four resistance strain gauges are evenly attached to the surface of the center portion of the column-type elastic body. This sensor maintains the advantages of traditional column-type sensors, such as simple structure and ease of manufacture, while overcoming the inherent low measurement accuracy of column-type sensors, achieving relatively high accuracy in terms of linearity, lateral resistance, torsion resistance, and azimuth error.

[0004] However, like existing column load cells, these column load cells have a high center of gravity during use, making them prone to tipping. This places high demands on the scale platform's position limits, platform strength, and foundation strength. Furthermore, column load cells often rely on stop pins to prevent rotation, but these pins are prone to falling off, resulting in a high failure rate and limited practicality. The connection between the sensor and the load-bearing attachment is easily affected by impurities such as sand and gravel, resulting in low weighing accuracy. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a column weighing module with a simple and reliable structure, easy processing, anti-rotation and anti-dumping, and can effectively protect sensors and equipment in response to the above technical status quo.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a column weighing module, including a column sensor, an upper pressure head and a base, characterized in that: a lower connecting plate is fixed to the lower end of the base, and an inverted U-shaped part is fixed to the lower connecting plate, which can limit the 360-degree swing amount of the column sensor in the front, back, left and right directions. A square hole is opened at the center position of the upper end surface of the inverted U-shaped part, and the upper end of the column sensor is formed with a square block structure with four cut sides that matches the square hole. The lower end of the column sensor is arranged on the base, and the upper end passes through the square hole of the inverted U-shaped part and abuts against the upper pressure head. A protective sealing ring is installed at the square hole of the inverted U-shaped part.

[0007] As an improvement, the inverted U-shaped piece is stamped in one piece, and the lower end of the inverted U-shaped piece is fixed to the left and right sides of the lower connecting plate by welding.

[0008] Furthermore, the protective sealing ring body is square, and a U-shaped groove is provided on the outer peripheral surface of the protective sealing ring to be sleeved with the wall surface of the square hole of the inverted U-shaped piece.

[0009] Furthermore, the middle part of the columnar sensor is cylindrical, the upper end of the columnar sensor is a reduced diameter upper bearing end, the middle part of the upper bearing end is convexly provided with a circle of square block structure that cooperates with the square hole, the upper pressure head adopts a countersunk convex spherical structure, the upper bearing end passes through the square hole of the inverted U-shaped part and abuts against the groove on the lower end face of the upper pressure head, and the middle square block structure of the upper bearing end is nested and matched with the protective sealing ring.

[0010] Furthermore, the lower end of the column sensor is a lower bearing end that cooperates with the base, and a positioning groove is recessed in the middle of the lower connecting plate for the base to be placed in. The lower end of the base is arranged in the positioning groove and fixed to the lower connecting plate by screws. The upper end of the base extends out of the upper end surface of the lower connecting plate, and the lower end surface of the lower bearing end is provided with a positioning groove for the upper end surface of the base to be placed in. The depth of the positioning groove is less than the height of the upper end of the base, and the top surface of the positioning groove is formed as an arc-shaped convex surface that is against the upper end surface of the base.

[0011] Furthermore, the diameter of the lower bearing end is consistent with the middle cylinder of the columnar sensor, and a circle of annular groove is provided between the lower bearing end and the middle cylinder.

[0012] Furthermore, the lower connecting plate is a square plate, the base is circular, the positioning groove recessed in the middle of the lower connecting plate is a circular groove, and the positioning groove provided on the lower end surface of the lower bearing end is a circular groove.

[0013] Furthermore, a weight-reducing hollow portion is provided in the middle of the left and right sides of the inverted U-shaped member. The upper end surface of the inverted U-shaped member is a horizontal circular plane, and the left and right sides of the inverted U-shaped member are a structure with a wide middle portion and narrow upper and lower portions.

[0014] Finally, the square hole has arc transition parts at the four corners, and correspondingly, the square block structure with four cut edges also has arc transition parts.

[0015] Compared with the existing technology, the advantages of the present invention are: the inverted U-shaped part is stamped and formed in one piece, which is easy to process and low in cost. At the same time, it adopts a square hole to prevent rotation, which is simple and reliable, and effectively limits the 360-degree swing of the sensor forward, backward, left and right; a protective silicone sealing ring is installed in the square hole to achieve good reset of the sensor; the upper pressure head adopts a countersunk convex spherical structure, which can effectively connect with the concave pressure head of the double shear beam sensor on the market. The present invention has a simple and reliable structure, is easy to process, and is low in cost, and can be quickly installed. Anti-overturning and anti-tipping devices are provided in all directions to limit the horizontal lateral force and eccentric loads in all directions on the module, effectively preventing excessive sensor swing and overturning of the scale platform, and can easily replace existing double shear beam sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Side view of

[0018] Figure 3 It is a structural schematic diagram of an inverted U-shaped member;

[0019] Figure 4 for Figure 3 A top view of

[0020] Figure 5 1 is an exploded view of an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 5 As shown, a column weighing module includes a column sensor 1, an upper pressure head 2, a base 3, a lower connecting plate 4 and an inverted U-shaped member 5. The lower end of the base 3 is fixed to the lower connecting plate 4, and the lower end of the inverted U-shaped member 5 is fixed to the lower connecting plate 4 to limit the 360-degree swing of the column sensor 1 forward, backward, left and right. A square hole 51 is opened at the center of the upper end surface of the inverted U-shaped member 5. The upper end of the column sensor 1 is formed with a four-sided cut square block structure 111 that cooperates with the square hole 51. Usually, for the convenience of processing, the square hole 51 has arc transition parts at the four corners. Correspondingly, the four-sided cut square block structure 111 also has arc transition parts, so their cross-sections are not square in the absolute sense. The lower end of the column sensor 1 is set on the base 3, and the upper end passes through the square hole 51 of the inverted U-shaped member 5 to abut against the upper pressure head 2. A protective silicone sealing ring 50 is installed at the square hole 51 of the inverted U-shaped member 5. Of course, a rubber sealing ring can also be used.

[0023] The specific structure is as follows: the inverted U-shaped member 5 is stamped and formed as a single piece, which is easy to process and low in cost. The upper end surface of the inverted U-shaped member 5 is a horizontal circular plane 53. The left and right sides of the inverted U-shaped member 5 are a structure with a wide middle part and narrow upper and lower parts. The lower end of the inverted U-shaped member 5 is fixed to the left and right sides of the lower connecting plate 4 by welding, and of course it can also be fixed by screws. The protective silicone sealing ring 50 is square in shape, usually with arc transition parts at the four corners. The outer surface of the protective silicone sealing ring 50 is provided with a circle of U-shaped grooves that are connected to the wall surface of the square hole 51 of the inverted U-shaped member 5. The middle part of the columnar sensor 1 is cylindrical, and the upper end of the columnar sensor 1 is a reduced diameter upper bearing end 11. The middle part of the upper bearing end 11 is convexly provided with a circle of square block structures 111 that match the square hole. The upper pressure head 2 adopts a countersunk convex spherical structure 22, which can achieve effective connection with the concave pressure head of the double shear beam sensor on the market. The upper bearing end 11 passes through the square hole 51 of the inverted U-shaped member 5 and abuts against the groove 21 on the lower end surface of the upper pressure head 2 . The middle square block structure 111 of the upper bearing end 11 is sleeved and matched with the protective silicone sealing ring 50 .

[0024] The lower end of the columnar sensor 1 is a lower bearing end 12 that mates with the base 2. A positioning groove 41 is recessed in the center of the lower connecting plate 4, into which the base 3 is placed. The lower end of the base 3 is set within the positioning groove 41 and secured to the lower connecting plate 4 via screws. The upper end of the base 3 extends beyond the upper end surface of the lower connecting plate 4. The lower end surface of the lower bearing end 12 is provided with a positioning groove 121 into which the upper end surface of the base 3 is placed. The depth of the positioning groove 121 is less than the height of the upper end of the base 3. The top surface of the positioning groove 121 is formed into an arc-shaped convex surface 122 that abuts against the upper end surface of the base 3. The diameter of the lower bearing end 12 is consistent with the central cylinder of the columnar sensor 1, and an annular groove is defined between the lower bearing end 12 and the central cylinder. The lower connecting plate 4 of this embodiment is a square plate, the base 3 is circular, the positioning groove 41 recessed in the middle of the lower connecting plate 4 is a circular groove, the positioning groove 121 opened on the lower end surface of the lower bearing end 12 is a circular groove, and a weight-reducing hollow portion 52 is opened in the middle of the left and right sides of the inverted U-shaped part 5.

[0025] The specific structure inside the column sensor 1 is consistent with the prior art and will not be repeated here.

[0026] This embodiment effectively limits the 360-degree swing of the column sensor 1 in the front, back, left, and right directions by providing an inverted U-shaped member 5 outside the column sensor 1, so that anti-falling and anti-overturning devices are provided in all directions, which limit the horizontal lateral force and eccentric loads in all directions on the module, effectively protecting the sensor and equipment, and ensuring that the vehicle scale and other equipment are always at the best measurement accuracy.

[0027] During operation, the sensor is placed on the lower connecting plate 4 via the base 3. The upper pressure head 2 is used to transfer the weighing load from the upper connecting plate to the load cell. Anti-tilt and anti-overturning devices are installed in all directions to limit the horizontal lateral forces and eccentric loads on the module, effectively protecting the sensor and equipment. The square hole 51 of the inverted U-shaped member 5 and its interaction with the square block structure 111 of the columnar sensor 1 effectively prevent the sensor from rotating.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A column weighing module, comprising a column sensor, an upper pressure head and a base, characterized in that: The lower end of the base is fixed with a lower connecting plate, and an inverted U-shaped piece is fixed on the lower connecting plate, which can limit the 360-degree swing of the column sensor in the front, back, left and right directions. A square hole is opened at the center of the upper end surface of the inverted U-shaped piece. The upper end of the column sensor is formed with a square block structure with four cut edges that matches the square hole. The lower end of the column sensor is arranged on the base, and the upper end passes through the square hole of the inverted U-shaped piece to abut against the upper pressure head. A protective sealing ring is installed at the square hole of the inverted U-shaped piece. The middle part of the columnar sensor is cylindrical, and the upper end of the columnar sensor is an upper bearing end with a reduced diameter. A square block structure is convexly provided in the middle of the upper bearing end, which cooperates with the square hole. The upper pressure head adopts a countersunk convex spherical structure. The upper bearing end passes through the square hole of the inverted U-shaped part and abuts against the groove on the lower end surface of the upper pressure head. The middle square block structure of the upper bearing end is nested with the protective sealing ring. The lower end of the column sensor is a lower bearing end that cooperates with the base, and a positioning groove for the base to be placed in the middle of the lower connecting plate is recessed. The lower end of the base is arranged in the positioning groove and fixed to the lower connecting plate by screws. The upper end of the base extends out of the upper end surface of the lower connecting plate, and the lower end surface of the lower bearing end is provided with a positioning groove for the upper end surface of the base to be placed. The depth of the positioning groove is less than the height of the upper end of the base, and the top surface of the positioning groove is formed into an arc-shaped convex surface that abuts against the upper end surface of the base. The inverted U-shaped member has a weight-reducing hollow portion in the middle of the left and right sides, the upper end surface of the inverted U-shaped member is a horizontal circular plane, and the left and right sides of the inverted U-shaped member are a structure with a wide middle part and narrow upper and lower parts; The square hole has arc transition parts at the four corners. Correspondingly, the square block structure with four cut edges also has arc transition parts.

2. The column weighing module according to claim 1, characterized in that: The inverted U-shaped piece is integrally stamped, and the lower end of the inverted U-shaped piece is fixed to the left and right sides of the lower connecting plate by welding.

3. The column weighing module according to claim 2, characterized in that: The main body of the protective sealing ring is square, and a circle of U-shaped grooves that are sleeved with the wall surface of the square hole of the inverted U-shaped piece are provided on the outer peripheral surface of the protective sealing ring.

4. The column weighing module according to claim 1, characterized in that: The diameter of the lower bearing end is consistent with the middle cylinder of the columnar sensor, and a circle of annular groove is provided between the lower bearing end and the middle cylinder.

5. The column weighing module according to claim 4, characterized in that: The lower connecting plate is a square plate, the base is circular, the positioning groove concavely arranged in the middle of the lower connecting plate is a circular groove, and the positioning groove opened on the lower end surface of the lower bearing end is a circular groove.

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