Pressure sensor

Abstract

The utility model provides a pressure sensor, and belongs to the technical field of pressure detection. Comprising a base, a stress top plate is arranged on the upper end face of the base, a plurality of limiting lugs are fixed to the edge of the outer side of the stress top plate, vertical guide rods are detachably installed on the lower end faces of the limiting lugs, a plurality of guide blocks are fixed to the positions, corresponding to the limiting lugs, of the edge of the outer side of the base, and guide holes allowing the guide rods to vertically penetrate through are formed in the guide blocks; a plurality of fixing blocks are installed in the guide hole in an embedded mode and evenly distributed around the inner wall of the guide hole, and a plurality of balls are installed on the sides, facing the middle of the guide hole, of the fixing blocks in an embedded mode. According to the utility model, not only can guiding be carried out by using the insertion matching of the guide rod and the guide block so as to prevent the connecting column from being damaged by oblique force, but also the friction force between the guide rod and the guide block can be effectively reduced by arranging the fixed block and the ball, so that the pressure detection precision can be ensured, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure detection, and particularly relates to a pressure sensor. Background Art

[0002] A pressure sensor is a device that can sense a pressure signal and convert it into an electrical signal. It is widely used in various industrial control environments and usually consists of a pressure-sensitive element and a signal processing unit.

[0003] Currently, in order to solve the problem that during the use of a flange surface force-bearing pressure sensor, when an oblique force is applied between the pressure-receiving body and the base of the pressure sensor, the connecting column is prone to damage. Chinese Patent with publication number CN219200681U discloses a pressure sensor. When the force-receiving top plate is subjected to pressure, the force-receiving top plate can drive the connecting column to move towards the inner bottom end of the fixed jack, thereby pressing down. At the same time, the force-receiving top plate can make the mounting protrusion and the connecting plug move downward, so that the connecting plug can move downward inside the guiding and limiting block for guiding and limiting to prevent the oblique force from damaging the connecting column.

[0004] However, in actual use of this prior art, when the connecting plug passes through the guiding and limiting block for guiding, friction is likely to occur between the connecting plug and the guiding and limiting block, resulting in an impact on the pressure detection accuracy of the pressure sensor. Especially in the case of long-term use, if the surface of the connecting plug or the guiding and limiting block becomes rusty, the impact of friction on the pressure detection accuracy will be more obvious, and further optimization is needed.

[0005] Therefore, this application provides a pressure sensor to solve the above technical problems. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a pressure sensor to solve the problem that in some existing pressure sensors, when the connecting plug passes through the guiding and limiting block for guiding, friction is likely to occur between the connecting plug and the guiding and limiting block, resulting in an impact on the pressure detection accuracy of the pressure sensor.

[0007] To solve the above technical problems, the utility model provides the following technical solutions:

[0008] A pressure sensor, comprising a base, an upper end surface of the base is provided with a force-bearing top plate, an outer edge of the force-bearing top plate is fixed with a plurality of limiting ears, a lower end surface of the limiting ear is detachably installed with a vertical guide rod, an outer edge of the base corresponds to positions of the plurality of limiting ears and is fixed with a plurality of guide blocks, a guide hole for the vertical penetration of the guide rod is formed in the guide block, and a plurality of fixing blocks are fitted and installed in the guide hole, the plurality of fixing blocks are uniformly distributed around an inner wall of the guide hole, and a plurality of balls are fitted and installed on a side of each fixing block facing the middle of the guide hole.

[0009] Optionally, a fixing socket is formed in a middle of the upper end surface of the base, a connecting column is movably connected in the fixing socket, and a top end of the connecting column is fixed to a middle of a lower end surface of the force-bearing top plate.

[0010] Optionally, at least three of the fixing blocks in the guide hole are provided.

[0011] Optionally, a plurality of balls fitted and installed on a side of the fixing block are linearly and vertically equidistantly distributed.

[0012] Optionally, a fixing screw hole is formed at an end of the limiting ear away from the force-bearing top plate, a stud is fixed to a top end of the guide rod, the stud is threadedly inserted into the fixing screw hole, and a limiting disc is fixed to a lower end of the guide rod.

[0013] Optionally, a threaded connector is connected to a side of a bottom of the base, a wire is connected to the threaded connector, and a spring sleeve is fixed to the threaded connector, and the spring sleeve sleeves a connection portion between the wire and the threaded connector.

[0014] Optionally, a plurality of fixing ears are fixed to a bottom edge of the base, and mounting through holes are formed in the fixing ears.

[0015] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0016] In the above solution, thanks to the cooperation of the base, the force-bearing top plate, the limiting ears, the guide rods, the guide blocks and the fixing blocks, the force-bearing top plate can form a guiding function by inserting the guide rods into the guide holes on the guide blocks, so that when the force-bearing top plate moves downward under force, the guide rods move vertically under the limitation of the guide holes, which can avoid damage to the limiting ears caused by oblique forces, and the guide rods contact with the balls on the fixing blocks in the guide holes, which can effectively reduce the friction between the guide rods and the guide holes, and further ensure the pressure detection accuracy of the present pressure sensor, and the use effect is good.

[0017] Meanwhile, thanks to the cooperation of the wire, the threaded connector and the spring sleeve, when the wire is connected to the bottom of the base through the threaded connector, the spring sleeve can elastically cover and protect the connection part of the wire and the threaded connector, and can avoid the problem that the connection part of the wire and the threaded connector is prone to bending, wear and breakage.

[0018] In summary, the device can not only be guided by the insertion fit of the guide rod and the guide block to prevent the oblique force from damaging the connecting column, but also effectively reduce the friction between the guide rod and the guide block by setting the fixed block and the ball, thereby ensuring the pressure detection accuracy and having a good use effect. Brief Description of the Drawings

[0019] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0020] Figure 1 is a schematic structural diagram of the pressure sensor;

[0021] Figure 2 is a schematic structural diagram of the force-bearing top plate of the pressure sensor;

[0022] Figure 3 is a schematic structural diagram of the base of the pressure sensor;

[0023] Figure 4 is of the pressure sensor Figure 3 is an enlarged schematic diagram of the structure at A in

[0024] Figure 5 is of the pressure sensor Figure 3 is an enlarged schematic diagram of the structure at B in.

[0025] [Reference Numerals]

[0026] 1. Base; 101. Fixed ear; 2. Force-bearing top plate; 3. Connecting column; 4. Limit ear; 401. Fixed screw hole; 5. Guide rod; 501. Stud; 502. Limit disk; 6. Fixed jack; 7. Guide block; 701. Guide hole; 8. Fixed block; 801. Ball; 9. Wire; 10. Threaded connector; 11. Spring sleeve.

[0027] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments. Detailed Embodiments

[0028] The following will describe in detail a pressure sensor provided by the present utility model in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present utility model.

[0029] It should be noted that in the specification, references to "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Additionally, when combining an embodiment to describe a specific feature, structure, or characteristic, implementing such a feature, structure, or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0030] Generally, terms can be understood at least in part from their use in context. For example, at least in part depending on the context, the term "one or more" used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, can allow for the existence of other factors that are not necessarily explicitly described.

[0031] It can be understood that the meanings of "on...", "above...", and "over..." in the present utility model should be interpreted in the broadest manner, such that "on..." not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above..." or "over..." not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0032] In addition, spatial relative terms such as "under...", "below...", "lower", "above...", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the accompanying drawings. Spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptive terms used herein can be similarly interpreted accordingly.

[0033] Such as Figure 1 、 Figure 2 and Figure 3As shown, an embodiment of the present utility model provides a pressure sensor, including a base 1. An upper end surface of the base 1 is provided with a force-bearing top plate 2. A fixing jack 6 is opened in the middle of the upper end surface of the base 1. A connecting column 3 is movably connected in the fixing jack 6. A top end of the connecting column 3 is fixed to the middle of a lower end surface of the force-bearing top plate 2. Among them, a plurality of fixing ears 101 are fixed to a bottom edge of the base 1. Mounting through holes are opened in the fixing ears 101, and bolts can be used to fix the base 1 at an appropriate position for pressure detection.

[0034] A plurality of limiting ears 4 are fixed to an outer edge of the force-bearing top plate 2. A vertical guide rod 5 is detachably mounted on a lower end surface of the limiting ear 4. Specifically, a fixing screw hole 401 is opened at one end of the limiting ear 4 away from the force-bearing top plate 2, and a stud 501 is fixed to a top end of the guide rod 5. The stud 501 is threadedly inserted into the fixing screw hole 401, and a limiting disk 502 is fixed to a lower end of the guide rod 5, so that the guide rod 5 can be threadedly inserted and mounted on the lower end surface of the limiting ear 4.

[0035] At the same time, in cooperation with Figure 4 As shown, a plurality of guide blocks 7 are fixed to an outer edge of the base 1 corresponding to positions of the plurality of limiting ears 4. A guide hole 701 for the guide rod 5 to vertically penetrate is opened in the guide block 7, and a plurality of fixing blocks 8 are fitted and mounted in the guide hole 701. At least three fixing blocks 8 are provided. In this embodiment, specifically three fixing blocks 8 are provided. The three fixing blocks 8 are evenly distributed around an inner wall of the guide hole 701. A plurality of balls 801 are fitted and mounted on a side of each fixing block 8 facing the middle of the guide hole 701. The plurality of balls 801 are linearly and vertically equidistantly distributed. After the guide rod 5 is inserted into the guide hole 701, the guide rod 5 can contact the balls 801, thereby effectively reducing the friction between the guide rod 5 and the guide hole 701, reducing the influence of the friction on the detection of this pressure sensor, and further ensuring the pressure detection accuracy.

[0036] In addition, as Figure 5 shown, a threaded connector 10 is connected to one side of a bottom of the base 1. A wire 9 is connected to the threaded connector 10, and a spring sleeve 11 is fixed to the threaded connector 10. The spring sleeve 11 sleeves a connection part of the wire 9 and the threaded connector 10. Therefore, the spring sleeve 11 can be used to elastically cover and protect the connection part of the wire 9 and the threaded connector 10, so as to avoid the problem that the connection part of the wire 9 and the threaded connector 10 is easily bent, worn and broken.

[0037] The working principle provided by the present utility model is as follows. For this pressure sensor, during use, the base 1 is fixed at an appropriate position by the fixing ears 101 in cooperation with bolts. Then, when the force-bearing top plate 2 is under force, the guiding rod 5 can be inserted into the guiding hole 701 on the guiding block 7 to form a guiding effect. When the force-bearing top plate 2 moves downward under force, the guiding rod 5 moves vertically under the restriction of the guiding hole 701, which can prevent the limiting ear 4 from being damaged by an oblique force. Moreover, the guiding rod 5 contacts the ball 801 on the fixing block 8 in the guiding hole 701, which can effectively reduce the friction between the guiding rod 5 and the guiding hole 701, and thus ensure the pressure detection accuracy of this pressure sensor, with good use effects.

[0038] In summary, this device can not only use the insertion and cooperation of the guiding rod 5 and the guiding block 7 for guiding to prevent the oblique force from damaging the connecting column 3, but also effectively reduce the friction between the guiding rod 5 and the guiding block 7 by setting the fixing block 8 and the ball 801, and thus can ensure the pressure detection accuracy, with good use effects.

[0039] The present utility model covers any alternatives, modifications, equivalent methods, and solutions made within the essence and scope of the present utility model. In order to enable the public to have a thorough understanding of the present utility model, specific details are described in detail in the following preferred embodiments of the present utility model. However, those skilled in the art can fully understand the present utility model without these detailed descriptions. In addition, well-known methods, processes, procedures, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present utility model.

[0040] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A pressure sensor, comprising a base (1), wherein the upper end surface of the base (1) is provided with a force-bearing top plate (2), characterized in that: A plurality of limiting ears (4) are fixed to the outer edge of the load-bearing top plate (2), and a vertical guide rod (5) is detachably mounted on the lower end surface of the limiting ear (4). A plurality of guide blocks (7) are fixed to the outer edge of the base (1) at positions corresponding to the plurality of limiting ears (4), and a guide hole (701) is provided on the guide block (7) for the guide rod (5) to vertically pass through, and a plurality of fixing blocks (8) are embedded and mounted in the guide hole (701). The plurality of fixing blocks (8) are evenly distributed around the inner wall of the guide hole (701), and a plurality of balls (801) are embedded and mounted on one side of the fixing block (8) facing the middle of the guide hole (701).

2. The pressure sensor according to claim 1, characterized in that: A fixing socket (6) is provided in the middle of the upper end surface of the base (1), a connecting column (3) is movably connected in the fixing socket (6), and the top end of the connecting column (3) is fixed to the middle of the lower end surface of the load-bearing top plate (2).

3. The pressure sensor according to claim 1, characterized in that: At least three fixing blocks (8) are provided in the guide hole (701).

4. The pressure sensor according to claim 1, characterized in that: The plurality of balls (801) embedded and installed on the side of the fixing block (8) are linearly and vertically equidistantly distributed.

5. The pressure sensor according to claim 1, characterized in that: A fixing screw hole (401) is provided at one end of the limiting ear (4) away from the load-bearing top plate (2), and a stud (501) is fixed at the top end of the guide rod (5), the stud (501) is threadedly inserted into the fixing screw hole (401), and a limiting plate (502) is fixed at the lower end of the guide rod (5).

6. The pressure sensor according to claim 1, characterized in that: A threaded connector (10) is connected to one side of the bottom of the base (1), a wire (9) is connected to the threaded connector (10), and a spring sleeve (11) is fixed on the threaded connector (10), the spring sleeve (11) covers the connection portion between the wire (9) and the threaded connector (10).

7. The pressure sensor according to claim 1, characterized in that: A plurality of fixing ears (101) are fixed to the bottom edge of the base (1), and the fixing ears (101) are provided with through holes for installation.

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