High-waterproof-performance sealing structure for Hall principle sensor

Abstract

The utility model discloses a sealing structure with high waterproof performance for a Hall principle sensor, the free end of a rotating shaft is inserted into a base, and a rotating seal is arranged between the rotating shaft and the base; a bearing gland is arranged at the top of the base, a static seal is arranged between the top of the base and the bottom of the bearing gland, a first groove is formed in the lower portion of the bearing gland, a second groove is formed in the top of the bearing gland, a sealing partition plate is arranged between the first groove and the second groove, and the first groove is used for containing the free end of a rotating shaft. A magnet is arranged at the top of the free end of the rotating shaft, the second groove is used for containing a Hall chip, a shell seal is arranged between the inner wall of the shell and the side wall of the base, and an end face seal is arranged between the bottom of the shell and the top of the base. The sealing device is simple in structure and convenient to install, and is particularly suitable for sealing between non-contact detection elements such as Hall principle sensors and detected elements.

Description

Technical Field

[0001] The utility model relates to a high waterproof performance sealing structure for a Hall principle sensor, belonging to the technical field of length measuring and angle measuring sensors in engineering machinery. Background Art

[0002] At present, in domestic engineering machinery, length measuring sensors are often used in detection systems such as the extension length of the boom, the remaining number of turns of the winch wire rope, and the extension length of the outriggers.

[0003] In recent years, Hall principle length and angle measurement sensors have gradually been used in engineering machinery, effectively solving problems such as low detection accuracy of gears and potentiometers in traditional length and angle sensors and poor reliability caused by mechanical wear.

[0004] However, the existing Hall principle detection device cannot adapt to the application of engineering machinery in harsh outdoor environments. The waterproof design of the Hall circuit is more important than when used indoors, and its waterproof ability directly affects the protection performance and reliability of the sensor. The existing Hall principle detection device has a sealing structure between the shaft and the base, which requires high machining precision of the shaft and the base. The shaft is a moving part. Once it is worn or the machining quality is unqualified, a gap will appear in the sealing structure between the shaft and the base, causing the seal to fail and water to enter. The probability of moisture entering the circuit board side from the shaft is high, and the moisture cannot be isolated from the circuit board, causing the electrical components on the circuit board to fail and be damaged under harsh conditions such as humidity, water vapor, and rain, and unable to output signals normally, reducing the reliability of the sensor.

[0005] To this end, the utility model designs a highly waterproof sealing structure to solve the problem of insufficient sealing of the existing Hall principle sensor. Utility Model Content

[0006] Purpose: In order to overcome the deficiencies in the prior art, the utility model provides a high waterproof performance sealing structure for a Hall principle sensor.

[0007] Technical solution: To solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A high waterproof performance sealing structure for a Hall principle sensor comprises: a rotating shaft, a rotary seal, a base, a shell, a circuit board, a bearing gland, a magnet, a static seal, a shell seal, and an end face seal.

[0009] The free end of the rotating shaft is inserted into the base, and a rotating seal is arranged between the rotating shaft and the base. A bearing pressure cover is arranged on the top of the base, and a static seal is arranged between the top of the base and the bottom of the bearing pressure cover. A first groove is arranged below the bearing pressure cover, and a second groove is arranged on the top of the bearing pressure cover. A closed partition is arranged between the first groove and the second groove. The first groove is used to accommodate the free end of the rotating shaft, and a magnet is arranged on the top of the free end of the rotating shaft. The second groove is used to accommodate the Hall chip.

[0010] As a preferred solution, a shell seal is provided between the inner wall of the shell and the side wall of the base.

[0011] As a preferred solution, an end face seal is provided between the bottom of the shell and the top of the base.

[0012] As a preferred solution, a circuit board is arranged on the top of the bearing gland, and a Hall chip is arranged on the bottom of the circuit board.

[0013] As a preferred solution, the positions of the magnet and the Hall chip correspond to each other.

[0014] As a preferred solution, the bearing gland comprises a gland body, a first groove is arranged at the bottom of the gland body, a second groove is arranged at the top of the gland body, a closed partition is arranged between the first groove and the second groove, and a plurality of stud through holes are arranged on the gland body.

[0015] As a preferred embodiment, the base includes a base body, a shaft through hole is provided on the base body, the shaft through hole is used to insert the shaft into the base, a bearing cover mounting hole is provided around the shaft through hole, a static seal mounting groove is provided between the shaft through hole and the bearing cover mounting hole, a shell support seat is also provided on the base body, and a circuit board mounting column is provided on the shell support seat.

[0016] As a preferred solution, the thickness of the closed partition is set to 0.5-2 mm.

[0017] As a preferred solution, the bearing gland is made of nylon plastic material.

[0018] As a preferred solution, the stud through hole corresponds to the position of the bearing gland mounting hole.

[0019] Beneficial effects: The utility model provides a high waterproof performance sealing structure for a Hall principle sensor, which has a simple structure and is easy to install, and is particularly suitable for sealing between non-contact detection elements such as Hall principle sensors and measured elements.

[0020] Furthermore, the present design has a bearing cover with a sealing function at one end, which physically isolates the shaft from the circuit board, effectively preventing external moisture from entering the circuit board side, improving the waterproof capability of the Hall principle sensor, greatly improving the reliability of the sensor, and improving the detection reliability of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the high waterproof performance sealing structure of the Hall principle sensor.

[0022] Figure 2 A cross-sectional schematic diagram of the bearing gland.

[0023] Figure 3 It is a schematic diagram of the structure of the bearing cover.

[0024] Figure 4 A schematic diagram of the structure of the base. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the examples of the utility model in conjunction with the drawings in the examples of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the utility model.

[0026] The present invention will be further described below in conjunction with specific embodiments.

[0027] Embodiment 1:

[0028] This embodiment introduces a high waterproof performance sealing structure for Hall principle sensors, such as Figure 1-Figure 2 As shown, it includes: a rotating shaft 1, a rotating seal 2, a base 3, a shell 4, a circuit board 5, a bearing cover 7, a magnet 6, a static seal 8, a shell seal 9, and an end face seal 10.

[0029] The free end of the rotating shaft 1 is inserted into the base 3, and a rotating seal 2 is arranged between the rotating shaft 1 and the base 3. A bearing pressure cover 7 is arranged on the top of the base 3, and a static seal 8 is arranged between the top of the base 3 and the bottom of the bearing pressure cover 7. A first groove 701 is arranged below the bearing pressure cover 7, and a second groove 702 is arranged on the top of the bearing pressure cover 7. A closed partition 703 is arranged between the first groove 701 and the second groove 702. The first groove 701 is used to accommodate the free end of the rotating shaft 1, and a magnet 6 is arranged on the top of the free end of the rotating shaft 1. The second groove 702 is used to accommodate a Hall chip.

[0030] Furthermore, a shell seal 9 is provided between the inner wall of the shell 4 and the side wall of the base 3 .

[0031] Furthermore, an end face seal 10 is provided between the bottom of the housing 4 and the top of the base 3 .

[0032] Furthermore, a circuit board 5 is disposed on the top of the bearing cover 7 , and a Hall chip is disposed on the bottom of the circuit board 5 .

[0033] Furthermore, the position of the magnet 6 corresponds to that of the Hall chip.

[0034] like Figure 3 As shown, further, the bearing gland 7 comprises a gland body 704, a first groove 701 is provided at the bottom of the gland body 704, a second groove 702 is provided at the top of the gland body 704, and a closed partition 703 is provided between the first groove 701 and the second groove 702. A plurality of stud through holes 705 are provided on the gland body 704.

[0035] like Figure 4 As shown, further, the base 3 includes a base body 301, a shaft through hole 302 is provided on the base body 301, the shaft through hole 302 is used for the shaft 1 to be inserted into the base 3, a bearing cover mounting hole 303 is provided around the shaft through hole 302, a static seal mounting groove 304 is provided between the shaft through hole 302 and the bearing cover mounting hole 303, a shell support seat 305 is also provided on the base body 301, and a circuit board mounting column 306 is provided on the shell support seat 305.

[0036] Furthermore, the thickness of the closed partition 703 is set to 0.5-2 mm.

[0037] Furthermore, the bearing cover 7 is made of nylon plastic material.

[0038] Furthermore, the stud through hole 705 corresponds to the position of the bearing cover mounting hole 303 .

[0039] Embodiment 2:

[0040] The Hall principle sensor with high waterproof performance sealing structure of the utility model is mainly divided into the sealing combination between the shell and the base, the rotating shaft and the base, and the base and the bearing gland. Two seals are designed between the shell 4 and the base 3, namely the shell seal 9 and the end face seal 10, which can ensure the sealing and waterproof performance between the shells. A rotating seal 2 is arranged between the rotating shaft 1 and the base 3, and a static seal 8 is arranged between the base 3 and the bearing gland 7 to prevent moisture from entering the circuit board side through the gap between the base and the bearing gland.

[0041] In addition, a closed partition is set on the top of the bearing cover, which has a sealing function. The thickness of the sealing structure is L. The closed partition can effectively isolate the moisture on the shaft side from entering the circuit board side. The bearing cover is made of nylon plastic material, so it does not contain magnetic materials to avoid affecting sensor detection. The value of L needs to be determined according to the material of the bearing cover and the inductive communication parameters of the magnet and the Hall chip. Through design optimization, the L value range is determined to be 0.5-2mm, which improves the waterproof performance while ensuring the normal inductive communication between the magnet and the Hall chip.

[0042] When the sensor is working, one end of the shaft extends out of the base, and the shaft is driven to rotate by the external mechanical structure. A radial magnet is installed at the other end, and the Hall chip on the circuit board is arranged vertically facing the magnet. When the shaft rotates, the magnet and the Hall chip produce magnetic field changes and output detection signals. During the shaft rotation process, a rotating seal is set between the shaft and the base, and a static seal is set between the base and the bearing gland. At the same time, one end of the bearing gland is a closed partition structure, which can effectively prevent moisture from entering the circuit board side through the shaft, thereby improving the waterproof performance of the sensor.

[0043] 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 principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high waterproof sealing structure for a Hall principle sensor, comprising: A rotating shaft, a base, and a shell, characterized in that: the free end of the rotating shaft is inserted into the base, and a rotating seal is arranged between the rotating shaft and the base; a bearing pressure cover is arranged on the top of the base, and a static seal is arranged between the top of the base and the bottom of the bearing pressure cover, a first groove is arranged below the bearing pressure cover, a second groove is arranged on the top of the bearing pressure cover, and a closed partition is arranged between the first groove and the second groove, the first groove is used to accommodate the free end of the rotating shaft, a magnet is arranged on the top of the free end of the rotating shaft, and the second groove is used to accommodate a Hall chip.

2. A high waterproof performance sealing structure for a Hall principle sensor according to claim 1, characterized in that: A shell seal is arranged between the inner wall of the shell and the side wall of the base.

3. A high waterproof performance sealing structure for a Hall principle sensor according to claim 1, characterized in that: An end face seal is arranged between the bottom of the shell and the top of the base.

4. A high waterproof performance sealing structure for a Hall principle sensor according to claim 1, characterized in that: A circuit board is arranged on the top of the bearing pressure cover, and a Hall chip is arranged on the bottom of the circuit board.

5. The high waterproof performance sealing structure for Hall principle sensor according to claim 1, characterized in that: The magnet corresponds to the position of the Hall chip.

6. A high waterproof performance sealing structure for a Hall principle sensor according to claim 1, characterized in that: The bearing gland comprises a gland body, a first groove is arranged at the bottom of the gland body, a second groove is arranged at the top of the gland body, a closed partition is arranged between the first groove and the second groove; and a plurality of stud through holes are arranged on the gland body.

7. A high waterproof performance sealing structure for a Hall principle sensor according to claim 6, characterized in that: The base includes a base body, a shaft through hole is provided on the base body, the shaft through hole is used to insert the shaft into the base, a bearing cover mounting hole is provided around the shaft through hole, a static seal mounting groove is provided between the shaft through hole and the bearing cover mounting hole, a shell support seat is also provided on the base body, and a circuit board mounting column is provided on the shell support seat.

8. The high waterproof performance sealing structure for Hall principle sensor according to claim 1, characterized in that: The thickness of the closed partition is set to 0.5-2 mm.

9. A high waterproof performance sealing structure for a Hall principle sensor according to claim 1, characterized in that: The bearing gland is made of nylon plastic material.

10. A high waterproof performance sealing structure for a Hall principle sensor according to claim 7, characterized in that: The stud through hole corresponds to the position of the bearing cover mounting hole.

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