Pressure sensor

Abstract

The utility model discloses a pressure sensor, and particularly relates to the technical field of pressure sensors, and the pressure sensor comprises a housing, a detection rod is slidably installed in the housing, one end of the detection rod is a pressing head which always extends out of the housing, the other end of the detection rod is a rack, and the detection rod is fixedly sleeved with a lantern ring. A baffle through which the detection rod slidably penetrates is fixedly installed in an inner cavity of the shell, the detection rod is sleeved with a spring, the two ends of the spring abut against the lantern ring and the baffle respectively, the rack end of the detection rod is meshed with a first gear, the first gear is coaxially and fixedly connected with a second gear, and the first gear and the second gear are jointly coaxially and fixedly connected with a first rotating shaft; the second gear is meshed with a third gear, the third gear is coaxially and fixedly connected with a second rotating shaft, a dial plate is embedded in the circular opening of the shell, the second rotating shaft penetrates through the dial plate to be fixedly connected with a pointer, and the second rotating shaft is coaxially sleeved with a rotary encoder.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pressure sensor technical field, concretely relates to a pressure sensor. BACKGROUND

[0002] Pressure sensor is the device or device that can feel pressure signal and can change pressure signal into usable output electric signal according to certain rule.

[0003] The existing pressure sensor can only transmit the detected pressure value to the corresponding receiving server, if it is installed on the production line, the maintenance engineer can not directly observe the pressure value detected by the pressure sensor, and needs to log in the server background to check the detected pressure value, which is inconvenient. Therefore, a new type of pressure sensor is needed. UTILITY MODEL CONTENT

[0004] To solve the above problems, the utility model discloses a pressure sensor.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A pressure sensor, comprising a shell, a detection rod is slidably installed in the shell, one end of the detection rod is a pressing head always extending out of the shell, and the other end of the detection rod is a rack, a sleeve ring is fixedly sleeved on the detection rod, a baffle is fixedly installed in the shell cavity and is slidably penetrated by the detection rod, a spring is sleeved on the detection rod, and the two ends of the spring are tightly abutted against the sleeve ring and the baffle respectively, the rack end of the detection rod is engaged with a first gear, the first gear is coaxially fixedly connected with a second gear, the first gear and the second gear are coaxially fixedly connected with a first rotating shaft, the second gear is engaged with a third gear, the diameter of the second gear is greater than the diameter of the first gear and the diameter of the third gear, the third gear is coaxially fixedly connected with a second rotating shaft, a dial is inlaid at the circular opening of the shell, and a pointer is fixedly connected with the second rotating shaft penetrating the dial, and a rotary encoder is coaxially sleeved on the second rotating shaft.

[0007] As a preferred technical scheme of the utility model, the shell cavity extends at least three sliding assemblies which cooperatively wrap the detection rod, and the sliding assemblies are arranged between the sleeve ring and the pressing head of the detection rod.

[0008] As a preferred technical scheme of the utility model, each sliding assembly comprises a sliding seat fixedly connected with the inner cavity wall of the shell, at least two linearly arranged rollers are rotatably installed on the sliding seat, and the rollers are in rolling contact with the outer wall of the detection rod.

[0009] As a preferred technical scheme of the utility model, one end of the first rotating shaft and the second rotating shaft is rotatably connected with the shell, and the other end is rotatably connected with the dial.

[0010] As a preferred technical scheme of the utility model, the shell is inlaid with a transparent plate sealing the circular opening, and the transparent plate covers the dial in the inner cavity of the shell.

[0011] As a preferred technical scheme of the utility model, the outer surface of the shell extends at least two fixing bases provided with through holes, and all the fixing bases are arranged on the same plane.

[0012] As a preferred technical scheme of the utility model, the shell is provided with a through hole penetrating the rack end of the detection rod, and the inner cavity of the shell is provided with a circuit board matched with the rotary encoder.

[0013] The utility model has the advantages of:

[0014] First, the pressure sensor of the utility model drives the pointer to rotate through the movement of the detection rod, so that the pointer points to the scale value of the dial represented by the pressure value, and the detection rod drives the rotary encoder, and the rotary angle value detected by the rotary encoder is transmitted to the circuit board, and the circuit board calculates the pressure value through the rotary angle value, and the convenience of line detection is improved due to the setting of two display modes of pressure value.

[0015] Second, the detection rod drives the first gear to rotate, and since the diameter of the second gear is greater than the diameter of the first gear and the diameter of the third gear, the rotary angle of the first gear is enlarged (i.e. the rotary angle of the second rotating shaft is greater than the rotary angle of the first gear), and the detection accuracy of the pressure sensor is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic view of the embodiment of the utility model;

[0017] Figure 2 It is the structure schematic view of one angle of the detection rod, the sliding assembly, the sleeve ring, the spring, the baffle and the pointer of the embodiment of the utility model;

[0018] Figure 3 It is the structure schematic view of another angle of the detection rod, the sliding assembly, the sleeve ring, the spring, the baffle and the pointer of the embodiment of the utility model; Figure 2

[0019] Figure 4 It is the structure schematic view of another angle of the detection rod, the sliding assembly, the sleeve ring, the spring, the baffle and the pointer of the embodiment of the utility model;

[0020] Figure 5 It is the structure schematic view of another angle of the detection rod, the sliding assembly, the sleeve ring, the spring, the baffle and the pointer of the embodiment of the utility model; Figure 3

[0021] Figure 6 It is the structure schematic view of the sliding assembly of the embodiment of the utility model;​​

[0022] Figure 7 It is a structure schematic view of the shell and the circuit board of the utility model embodiment.

[0023] List of figure mark:

[0024] 1, shell; 2, detection rod;

[0025] 3, sliding assembly; 301, sliding seat; 302, roller;

[0026] 4, collar; 5, spring; 6, baffle; 7, first rotating shaft; 8, first gear; 9, second gear; 10, third gear; 11, second rotating shaft; 12, pointer; 13, rotary encoder; 14, circuit board; 15, dial; 16, transparent plate; 17, fixed seat. DETAILED DESCRIPTION

[0027] The utility model is further illustrated below in combination with the drawings and specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the utility model and not used to limit the scope of the utility model.

[0028] Please refer to Figures 1-7 A pressure sensor, including shell 1, detection rod 2 is slidably installed in shell 1.Detection rod 2 one end is the press head that always extends shell 1, and the other end of detection rod 2 is rack.Shell 1 is provided with the through hole that is suitable for the rack end of detection rod 2 to pass through.Detection rod 2 is fixedly sleeved with collar 4, and the baffle 6 of detection rod 2 is slidably passed through and is fixedly installed in the inner chamber of shell 1.Detection rod 2 is sleeved with spring 5, and the both ends of spring 5 are respectively abutted against collar 4 and baffle 6.Detection rod 2 rack end is engaged with first gear 8, and first gear 8 is coaxially fixedly connected with second gear 9.First gear 8 and second gear 9 are coaxially fixedly connected with first rotating shaft 7 together.Second gear 9 is engaged with third gear 10.The diameter of second gear 9 is greater than the diameter of first gear 8 and the diameter of third gear 10.Third gear 10 is coaxially fixedly connected with second rotating shaft 11.Circular opening of shell 1 is inlaid with dial 15, and second rotating shaft 11 is fixedly connected with pointer 12 and passes through dial 15.Second rotating shaft 11 is coaxially sleeved with rotary encoder 13, and the bracket of rotary encoder 13 is fixedly connected with the inner wall of shell 1.

[0029] The inner cavity of the shell 1 extends at least three sliding assemblies 3 which wrap the detection rod 2, and the sliding assemblies 3 are arranged between the sleeve 4 and the pressing head of the detection rod 2. The part of the detection rod 2 wrapped by the sliding assemblies 3 is a prism, and the embodiment in the drawings is a four-prism, and each face of the four-prism is provided with a sliding assembly 3. Each sliding assembly 3 comprises a sliding seat 301 fixedly connected with the wall of the inner cavity of the shell 1, the sliding seat 301 is rotatably provided with at least two linearly arranged rollers 302, and the rollers 302 are in rolling contact with the outer wall of the detection rod 2. The shell 1 is not in direct contact with the detection rod 2 at the opening of the shell 1 which is adapted to the movement of the detection rod 2, the detection rod 2 is in contact with the shell 1 through the sliding assembly 3, and the friction of the movement of the detection rod 2 is reduced.

[0030] The first rotating shaft 7 and the second rotating shaft 11 are rotatably connected with the shell 1 at one end and rotatably connected with the dial 15 at the other end. The inner cavity of the shell 1 extends a cylinder which is adapted to the first rotating shaft 7 and the second rotating shaft 11, and the dial 15 is provided with a circular hole which is adapted to the first rotating shaft 7 and the second rotating shaft 11.

[0031] The shell 1 is inlaid with a transparent plate 16 which seals the circular opening thereof, and the transparent plate 16 covers the dial 15 in the inner cavity of the shell 1. The transparent plate 16 can protect the pointer 12 and the dial 15 from being touched by the outside world.

[0032] The outer surface of the shell 1 extends at least two fixing seats 17 which are provided with through holes, and all the fixing seats 17 are arranged in the same plane. In the embodiment in the drawings, four fixing seats 17 are provided.

[0033] The inner cavity of the shell 1 is provided with a circuit board 14 which is adapted to the rotary encoder 13. The circuit board 14 is electrically connected with the rotary encoder 13. The circuit board 14 is integrated with a signal transmission module which can transmit pressure data to a server. The circuit board 14 can be powered by a battery installed in the inner cavity of the shell 1, or can be powered by a connector extended from the circuit board 14.

[0034] Working principle:

[0035] The shell 1 is fixed by the fixing seat 17, and the detection rod 2 is kept horizontal, when the laterally moving article presses the pressing head of the detection rod 2, the detection rod 2 moves laterally, so that the sleeve ring 4 compresses the spring 5, according to the Hooke's law, the pressure borne by the detection rod 2 is linearly related to the displacement amount of the detection rod 2, when the detection rod 2 moves, the detection rod 2 drives the second gear 9 to rotate through the meshed first gear 8 (at this time, the displacement amount of the detection rod 2 has been converted into a rotation angle), and the second gear 9 drives the third gear 10 to rotate, since the diameter of the second gear 9 is greater than the diameter of the first gear 8 and the diameter of the third gear 10, the rotation angle of the first gear 8 is amplified, so that the rotation angle of the pointer 12 driven by the third gear 10 through the second rotating shaft 11 is amplified, the scale value of the dial 15 pointed by the pointer 12 is the pressure value (the rotation angle of the pointer 12 is linearly related to the pressure value, and the scale of the dial 15 is the pressure value calibrated according to the rotation angle of the pointer 12), so as to enhance the detection precision of the pressure sensor (including the value directly pointed by the pointer 12 and the value detected by the rotary encoder 13), meanwhile, the second rotating shaft 11 drives the rotary encoder 13, the rotary encoder 13 detects the rotation angle value and transmits the rotation angle value to the circuit board 14, the circuit board 14 calculates the pressure value through the rotation angle value, and the circuit board 14 transmits the pressure data to the server through the signal transmission module.

[0036] It should be noted that the above content only illustrates the technical thought of the present application, and cannot limit the protection scope of the present application, for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, these improvements and refinements fall within the protection scope of the present application.

Claims

1. A pressure sensor comprising a housing (1), characterized in that The shell (1) is slidably installed with a detection rod (2), one end of the detection rod (2) is a pressing head always extending out of the shell (1), and the other end of the detection rod (2) is a rack, the detection rod (2) is fixedly sleeved with a sleeve ring (4), the shell (1) is fixedly installed with a baffle (6) which is slidably penetrated by the detection rod (2), the detection rod (2) is sleeved with a spring (5), and the two ends of the spring (5) are respectively abutted against the sleeve ring (4) and the baffle (6), the rack end of the detection rod (2) is engaged with a first gear (8), the first gear (8) is coaxially fixedly connected with a second gear (9), the first gear (8) and the second gear (9) are coaxially fixedly connected with a first rotating shaft (7), the second gear (9) is engaged with a third gear (10), the diameter of the second gear (9) is greater than the diameter of the first gear (8) and the diameter of the third gear (10), the third gear (10) is coaxially fixedly connected with a second rotating shaft (11), the circular opening of the shell (1) is inlaid with a dial plate (15), and the second rotating shaft (11) is fixedly connected with a pointer (12) penetrating the dial plate (15), and the second rotating shaft (11) is coaxially sleeved with a rotary encoder (13).

2. A pressure sensor according to claim 1, wherein The shell (1) extends out at least three sliding assemblies (3) which cooperatively wrap the detection rod (2), and the sliding assemblies (3) are arranged between the sleeve ring (4) and the pressing head of the detection rod (2).

3. A pressure sensor according to claim 2, wherein Each sliding assembly (3) comprises a sliding seat (301) fixedly connected with the inner cavity wall of the shell (1), the sliding seat (301) is rotatably installed with at least two linearly arranged rollers (302), and the rollers (302) are in rolling contact with the outer wall of the detection rod (2).

4. The pressure sensor of claim 1, wherein, The first rotating shaft (7) and the second rotating shaft (11) are rotatably connected with the shell (1) at one end and rotatably connected with the dial plate (15) at the other end.

5. The pressure sensor of claim 1, wherein, The shell (1) is inlaid with a transparent plate (16) sealing the circular opening thereof, and the transparent plate (16) covers the dial plate (15) in the inner cavity of the shell (1).

6. The pressure sensor of claim 1, wherein, The outer surface of the shell (1) extends out at least two fixed seats (17) provided with through holes, and all the fixed seats (17) are arranged on the same plane.

7. The pressure sensor of claim 1, wherein, The shell (1) is provided with a through hole adapted to the rack end of the detection rod (2) to penetrate, and the inner cavity of the shell (1) is installed with a circuit board (14) adapted to the rotary encoder (13).

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