CN219495432U - Weighing device with protect function - Google Patents

Abstract

The application provides a weighing device with protect function, including weighing sensor, be used for fixed weighing sensor's bottom plate and be used for placing the objective table of survey object. One end of the weighing sensor is connected with the bottom plate along the length extending direction of the weighing sensor, the other end of the weighing sensor is connected with the objective table, the bottom plate is connected to the lower part of the weighing sensor, and the objective table is connected to the upper part of the weighing sensor; the weighing device with the protection function further comprises a protection device, the protection device is fixedly connected to one side, facing the bottom plate, of the objective table, the protection device comprises a shell and a limiting device, the limiting device is fixedly connected to the shell, the bottom end of the limiting device extends out of the bottom end of the shell and is not in contact with the bottom plate, and the plane of the bottom end of the limiting device is lower than that of the weighing sensor. The protection of the symmetrical weighing sensor is realized, the damage of the symmetrical weighing sensor is reduced, and the symmetrical weighing sensor has the characteristics of simple structure and strong universality.

Description

A weighing device with protection function

technical field

The present application relates to the field of weight measurement, in particular to a weighing device with a protection function.

Background technique

The load cell is a device or device that can sense the pressure signal and convert the pressure signal into an available output electrical signal according to certain rules. The load cell is mainly used to weigh the weight of the object, so the load cell is a production practice The most common type of sensor is widely used in all walks of life.

The load cell is mainly used for weighing, the upper part of which places the object to be weighed, and the lower part usually needs to establish a stable connection with other devices. Among them, the patent with the publication number CN 213514591U discloses a fully automatic cryoprecipitate preparation instrument, in which a load cell is used to weigh the frozen plasma bag and the transfer bag, as can be seen from the accompanying drawings, the load cell of the device There is no protective device for the load cell during use.

When the above-mentioned equipment is in use, it lacks the protection of the load cell. In the process of long-term use, improper use, excessive force, overload, etc. will inevitably occur, which will cause damage to the load cell and make the load cell display inaccurate. , affecting the accuracy and precision of the weighing work.

Utility model content

The purpose of this application is to provide a weighing device with a protective function to solve problems such as damage to the load cell and inaccurate readings caused by improper use.

Embodiments of the application can be achieved through the following technical solutions:

A weighing device with a protective function, comprising a load cell, a base plate for fixing the load cell and a stage for placing an object to be measured, one end of the load cell along its length extending direction is connected to the base plate, The other end is connected to the loading platform, the bottom plate is connected to the bottom of the load cell, and the loading table is connected to the top of the load cell;

The weighing device with protection function also includes a protection device, and the protection device is fixedly connected to the side of the loading platform facing the bottom plate;

The protection device includes a casing and a limiting device, the limiting device is fixedly connected in the casing, the bottom end of the limiting device protrudes from the bottom end of the casing, and does not contact the bottom plate;

The plane where the bottom end of the limiting device is located is lower than the plane where the bottom end of the load cell is located.

Further, the protection device further includes a fixing part, the fixing part is fixedly connected in the housing, and the limiting device is fixedly connected to the housing through the fixing part.

Further, the fixing part includes a fixing plate and a hollow cylinder, the hollow cylinder is provided with a cavity for accommodating and fixing the limiting device, and the cavity matches the shape of the limiting device;

The fixing plate is located between the hollow cylinder and the shell, and the fixing plate, the hollow cylinder, and the shell are integrally formed.

Further, the limiting device includes a first bolt, a spring and a first nut, the spring is sleeved on the screw rod of the first bolt, and the first nut is fixedly connected to the cavity of the hollow cylinder At the bottom end, the cavity of the hollow cylinder is provided with threads matched with the screw rod;

The extension direction of the screw rod of the first bolt is perpendicular to the plane of the bottom plate, and the bottom end of the screw rod of the first bolt protrudes from the bottom end of the housing and does not contact the bottom plate.

Further, the load cell is provided with a first through hole, the stage is provided with a third through hole corresponding to the position of the first through hole, and the first through hole is a threaded hole;

The first through hole and the third through hole respectively pass through the load cell and the stage along a direction perpendicular to the plane of the bottom plate;

A bolt passes through the third through hole and is screwed to the first through hole to realize the detachable connection between the load cell and the loading platform.

Further, the third through hole is a slotted hole.

Further, a bracket is provided on the side of the bottom plate facing the load cell, and the bracket is fixedly connected to the bottom plate;

The load cell is detachably connected to the support, and the load cell is connected to the bottom plate through the support.

Further, the load cell is provided with a second through hole, the bracket is provided with a fourth through hole corresponding to the position of the second through hole, and the second through hole is a threaded hole;

The second through hole and the fourth through hole respectively pass through the load cell and the bracket along a direction perpendicular to the plane of the bottom plate;

Bolts pass through the fourth through hole and are screwed with the second through hole, so as to realize the detachable connection between the load cell and the bracket.

Further, the bottom plate includes a first bottom plate and a second bottom plate, and the vertical distance between the first bottom plate and the load cell is greater than the vertical distance between the second bottom plate and the load cell.

A weighing device with protection function provided by the embodiments of the present application has at least the following beneficial effects:

(1) The application realizes the protection of the load cell through the protection device, which reduces the damage to the load cell and prolongs the service life of the load cell.

(2) The application has simple structure and strong versatility, and can be adapted to different types of load cells.

Description of drawings

Fig. 1 is a side view of a weighing device with protection function in the present application;

Fig. 2 is the overall structural diagram of the connection between the load cell and the stage and the protection device in the present application;

Figure 3 is an exploded view of the connection between the load cell and the stage and the protective device in the present application;

Figure 4 is a top view of the connection between the load cell and the stage and the protection device in the present application;

Fig. 5 is a cross-sectional view of the load cell connected to the object platform and the protection device in the present application.

Label in the figure

1. Load cell, 11. First through hole, 12. Second through hole, 2. Base plate, 21. First base plate, 22. Second base plate, 23. Bracket, 3. Stage, 31, Third Through hole, 4, protection device, 41, limit device, 411, first bolt, 412, spring, 413, first nut, 42, shell, 43, fixed part, 431, hollow cylinder, 432, fixed plate.

Detailed ways

Hereinafter, the present application will be further described based on preferred embodiments with reference to the drawings.

In addition, for the convenience of understanding, various components on the drawings are enlarged (thick) or reduced (thin), but this approach is not intended to limit the scope of protection of the present application.

Words in the singular include the plural and vice versa.

In the description of the embodiments of the present application, it should be noted that if the orientation or positional relationship indicated by the terms "upper", "lower", "inner" and "outer" appear, it is based on the orientation or position shown in the drawings relationship, or the usual orientation or positional relationship of the products in the embodiments of the application when used, is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, in order to Specific orientation configurations and operations, therefore, are not to be construed as limitations on the application. In addition, in the description of the present application, in order to distinguish different units, words such as first and second are used in this specification, but these are not limited by the order of manufacture, nor can they be interpreted as indicating or implying relative importance. The titles in the detailed description of the application may be different from those in the claims.

The terms used in this specification are used to describe the embodiments of the present application, but are not intended to limit the present application. It should also be noted that, unless otherwise clearly stipulated and limited, the terms "set", "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediary, or an internal connection between two components. Those skilled in the art can specifically understand the specific meanings of the above terms in this application.

Fig. 1 shows a side view of a weighing device with protection function in the present application, as shown in Fig. 1, the above-mentioned weighing device with protection function includes a load cell 1, a base plate 2 and an object stage 3, wherein , the bottom plate 2 is used to fix the load cell 1, the stage 3 is used to place the object to be measured, and the load cell 1 is used to weigh the weight of the object to be measured.

Specifically, one end of the load cell 1 is connected to the base plate 2 along its length extension direction, and the other end is connected to the loading platform 3. Further, the base plate 2 is connected to the bottom of the load cell 1, and the loading table 3 is connected to the load cell. 1 above.

Figure 2 and Figure 3 show the overall structure diagram and exploded view of the connection between the load cell 1 and the stage 3 in this application, as shown in Figure 2 and Figure 3, the load cell 1 and the stage 3 are detachably connected .

Specifically, the load cell 1 is provided with a first through hole 11, the stage 3 is provided with a third through hole 31 corresponding to the position of the first through hole 11, the first through hole 11 is a threaded hole, and the bolt passes through the third through hole 31. The hole 31 is screw connected with the first through hole 11 to realize the detachable connection between the load cell 1 and the stage 3 .

Specifically, in order to achieve a stable connection between the load cell 1 and the stage 3 , the first through hole 11 and the third through hole 31 respectively penetrate through the load cell 1 and the stage 3 along a direction perpendicular to the plane of the bottom plate 2 .

Preferably, the third through hole 31 is a slotted hole. The bolts can be fixed at different positions of the third through hole 31 , which can not only realize the position adjustment of the stage 3 along the length direction of the slot hole, but also realize the connection between different types of load cells 1 and the stage 3 .

It is conceivable that the load cell 1 and the stage 3 can also be fixedly connected by welding, gluing, etc., no matter what connection method is adopted, as long as the stable connection between the load cell 1 and the stage 3 can be achieved , and easy to install.

Because the load cell 1 is under the action of external force, the internal elastic body produces elastic deformation under the action of external force, so that the resistance strain gauge pasted on the surface of the elastic body is deformed at the same time. After the resistance strain gauge is deformed, its resistance value changes. The corresponding measurement circuit converts this resistance change into an electrical signal, thus completing the process of converting the external force into an electrical signal. Since the load cell 1 needs to rely on deformation to measure the weight of the object to be measured, the load cell 1 cannot directly contact the bottom plate 2 before the load cell 1 weighs. Specifically, as shown in FIG. 1 , the load cell 1 is connected to the bottom plate 2 through a bracket 23 .

Specifically, a support 23 is provided on the side of the bottom plate 2 facing the load cell 1 , and the support 23 is fixedly connected to the bottom plate 2 .

It is conceivable that the bracket 23 and the bottom plate 2 can be fixedly connected by welding, gluing, etc., or can be made by one-piece molding. No matter what connection method is adopted, as long as the stable connection between the load cell 1 and the stage 3 can be realized That's it.

Further, the load cell 1 is detachably connected to the bracket 23 . Specifically, the load cell 1 is provided with a second through hole 12, and the bracket 23 is provided with a fourth through hole corresponding to the second through hole 12. The second through hole 12 is a threaded hole, and the bolt passes through the fourth through hole and connects with the fourth through hole. The two through holes 12 are screw connected to realize the detachable connection between the load cell 1 and the bracket 23 .

Specifically, in order to achieve a stable connection between the load cell 1 and the bracket 23 , the second through hole 12 and the third through hole respectively pass through the load cell 1 and the bracket 23 along a direction perpendicular to the plane of the bottom plate 2 .

It is conceivable that the load cell 1 and the bracket 23 can also be fixedly connected by welding, gluing, etc., no matter what connection method is adopted, as long as the load cell 1 and the bracket 23 can be stably connected.

In order to protect the load cell 1 and prevent the load cell 1 from being in direct contact with the bottom plate 2 , preferably, the above-mentioned weighing device with a protection function further includes a protection device 4 .

Specifically, as shown in FIG. 1 , the protection device 4 is fixedly connected to the side of the loading platform 3 facing the bottom plate 2 .

Fig. 2-Fig. 5 shows the overall structural diagram, exploded view, side view and sectional view of the connection between the protection device 4 and the load cell 1 in the present application, as shown in Fig. 2-Fig. 5, the protection device 4 includes a casing 42 and a limiting device 41, and the limiting device 41 is fixedly connected in the casing 42.

Specifically, when the object to be measured is placed on the stage 3, the protection device 4 and the load cell 1 will move downward synchronously. In order to protect the load cell 1, the plane where the bottom end of the protection device 4 is located is lower than The plane where the bottom end of the sensor 1 is located can realize that the protection device 4 first contacts the bottom plate 2 , and then realizes the protection of the load cell 1 .

Specifically, the bottom end of the limit device 41 protrudes from the bottom end of the shell 42, and the plane where the bottom end of the limit device 41 is located is lower than the plane where the bottom end of the load cell 1 is located, so that the limit device 41 and the load cell 1 During the synchronous displacement, the limit device 41 first contacts the bottom plate 2 so that the load cell 1 does not contact the bottom plate 1 .

Further, before weighing, the bottom end of the limiting device 41 is not in contact with the bottom plate 1 .

Specifically, in order to achieve a stable connection between the limiting device 41 and the housing 42 , the protection device 4 further includes a fixing part 43 fixedly connected in the housing 42 , and the limiting device 41 is fixedly connected to the housing 42 through the fixing part 43 .

Specifically, the fixing part 43 includes a hollow cylinder 431, and the hollow cylinder 431 is provided with a cavity for accommodating and fixing the limiting device 41. The cavity matches the shape of the limiting device 41, so that the limiting device 41 can just accommodate Placed inside the hollow cylinder 431.

Preferably, in order to strengthen the stability of the connection between the limiting device 41 and the housing 42, the fixing part 43 further includes a fixing plate 432, and the fixing plate 432 is located between the hollow cylinder 431 and the housing 42, so that the hollow cylinder 431 can be connected with the housing 42 from different directions. The shell 42 is connected to enhance the connection stability.

Preferably, in order to achieve a stable connection between the fixing plate 432 , the hollow cylinder 431 and the housing 42 , the fixing plate 432 , the hollow cylinder 431 and the housing 42 are integrally formed.

It is conceivable that the fixing plate 432 , the hollow cylinder 431 and the housing 42 can also be fixedly connected by means of welding, gluing or the like.

Specifically, as shown in Figure 3, the limiting device 41 includes a first bolt 411, a spring 412 and a first nut 413, the spring 412 is sleeved on the screw rod of the first bolt 411, and the first bolt 411 with the spring 412 is sleeved It is screw connected with the cavity of the hollow cylinder 431 and the first nut 413 .

Specifically, the first nut 413 is fixedly connected to the bottom end of the cavity of the hollow cylinder 431 , and the cavity of the hollow cylinder 431 is provided with threads matching the screw rod of the first bolt 411 .

Further, when the limiting device 41 is connected to the hollow cylinder 431, the first bolt 411 is covered with a spring 412 and screwed downward along the cavity of the hollow cylinder 431, when the bottom end of the first bolt 411 reaches the position of the first nut 413 , continue to screw down the cavity of the hollow cylinder 431 until the bottom end of the first bolt 411 passes through the bottom end of the shell 42 and protrudes. At this time, the spring 412 will give the first bolt 411 an upward force to prevent the position of the first bolt 411 from changing during the weighing process.

It is conceivable that when the deformation of the load cell 1 is large, the bottom end of the first bolt 411 will first contact the bottom plate 2, so that the load cell 1 does not contact the bottom plate 2, and then realizes the load cell 1. Protection; In addition, in the process of contacting the bottom end of the first bolt 411 with the bottom plate 2, the spring 412 gives the first bolt 411 an upward force, thereby preventing the first bolt from changing according to the position of 411.

It is conceivable that the length of the first bolt 411 protruding from the bottom of the shell 42 can be adjusted according to the weighing limit of different load cells 1 to fit different types of load cells 1 .

Preferably, in order to further enhance the protection of the load cell 1, the deformation space of the load cell 1 is increased. As shown in FIG. Specifically, the base plate 2 includes a first base plate 21 and a second base plate 22 , the first base plate 21 is located under the load cell 1 , and the second base plate 22 is located under the protection device 4 .

Further, the vertical distance between the first base plate 21 and the load cell 1 is greater than the vertical distance between the second base plate 22 and the load cell 1, the relative position of the first base plate 21 is lower, and the relative position of the second base plate 22 is higher, weighing One end of the load cell 1 is connected above the first base plate 21 , and the other end is suspended above the second base plate 22 , and the load cell 1 is not in contact with the second base plate 22 before weighing. This setting can further increase the distance between the load cell 1 and the bottom plate 2, so that after the first bolt 411 contacts the second bottom plate 22, there is still a large distance between the load cell 1 and the first bottom plate 21, which can be given The load cell 1 has a larger deformation space, thereby realizing the protection of the load cell 1 .

The specific implementation of the application has been described in detail above. For those skilled in the art, without departing from the principle of the application, some improvements and modifications can be made to the application, and these improvements and modifications also belong to the application. The scope of the claims.

Claims (9)

1. A weighing device with protection function, comprising a load cell, a base plate for fixing the load cell and a stage for placing a measured object, characterized in that: One end of the load cell is connected to the base plate along its length extension direction, and the other end is connected to the loading platform, the base plate is connected below the load cell, and the load table is connected above the load cell ; The weighing device with protection function also includes a protection device, and the protection device is fixedly connected to the side of the loading platform facing the bottom plate; The protection device includes a casing and a limiting device, the limiting device is fixedly connected in the casing, the bottom end of the limiting device protrudes from the bottom end of the casing, and does not contact the bottom plate; The plane where the bottom end of the limiting device is located is lower than the plane where the bottom end of the load cell is located. 2. A weighing device with protection function according to claim 1, characterized in that: The protection device further includes a fixing part, the fixing part is fixedly connected in the housing, and the limiting device is fixedly connected to the housing through the fixing part. 3. A weighing device with protection function according to claim 2, characterized in that: The fixing part includes a fixing plate and a hollow cylinder, the hollow cylinder is provided with a cavity for accommodating and fixing the limiting device, and the cavity matches the shape of the limiting device; The fixing plate is located between the hollow cylinder and the shell, and the fixing plate, the hollow cylinder, and the shell are integrally formed. 4. A weighing device with protection function according to claim 3, characterized in that: The limiting device includes a first bolt, a spring and a first nut, the spring is sleeved on the screw rod of the first bolt, and the first nut is fixedly connected to the bottom end of the cavity of the hollow cylinder, The cavity of the hollow cylinder is provided with threads matched with the screw; The extension direction of the screw rod of the first bolt is perpendicular to the plane of the bottom plate, and the bottom end of the screw rod of the first bolt protrudes from the bottom end of the housing and does not contact the bottom plate. 5. A weighing device with protection function according to claim 1, characterized in that: The load cell is provided with a first through hole, the stage is provided with a third through hole corresponding to the position of the first through hole, and the first through hole is a threaded hole; The first through hole and the third through hole respectively pass through the load cell and the stage along a direction perpendicular to the plane of the bottom plate; A bolt passes through the third through hole and is screwed to the first through hole to realize the detachable connection between the load cell and the loading platform. 6. A weighing device with protection function according to claim 5, characterized in that: The third through hole is a slot. 7. A weighing device with protection function according to claim 1, characterized in that: A bracket is provided on the side of the base plate facing the load cell, and the bracket is fixedly connected to the base plate; The load cell is detachably connected to the support, and the load cell is connected to the bottom plate through the support. 8. A weighing device with protection function according to claim 7, characterized in that: The load cell is provided with a second through hole, the bracket is provided with a fourth through hole corresponding to the position of the second through hole, and the second through hole is a threaded hole; The second through hole and the fourth through hole respectively pass through the load cell and the bracket along a direction perpendicular to the plane of the bottom plate; Bolts pass through the fourth through hole and are screwed with the second through hole, so as to realize the detachable connection between the load cell and the bracket. 9. A weighing device with protection function according to claim 1, characterized in that: The bottom plate includes a first bottom plate and a second bottom plate, and the vertical distance between the first bottom plate and the load cell is larger than the vertical distance between the second bottom plate and the load cell.