Miniature non-contact position sensor for throttle valve

Abstract

The utility model relates to a miniature non-contact position sensor for a throttle valve, which relates to the technical field of throttle valve sensing, and comprises a shell, one side of the shell is provided with a mounting cavity, a Hall sensing chip is arranged in the mounting cavity, the other side of the shell is provided with a mounting hole, a rotor is inserted in the mounting hole, and the Hall sensing chip is arranged in the mounting hole. A magnet is arranged at the end, close to the mounting cavity, of the rotor, the magnet and the Hall sensing chip are oppositely arranged, the rotor is sleeved with an abutting ring plate and a limiting ring plate, the abutting ring plate is fixedly connected with the rotor, the limiting ring plate is movably connected with the rotor, and the side, close to the magnet, of the limiting ring plate is used for abutting against the side, away from the magnet, of the abutting ring plate. The abutting ring plate and the limiting ring plate are jointly sleeved with a limiting sleeve, the limiting ring plate is connected with the limiting sleeve, the limiting sleeve is inserted into the mounting hole, and the limiting sleeve is connected with the mounting hole. The motor rotor has the effect of reducing rotor loss.

Description

TECHNICAL FIELD

[0001] The utility model relates to the throttle sensor technology field especially is related to a throttle micro non -contact position sensor. BACKGROUND

[0002] The non -contact throttle position sensor is a kind of electronic device for the opening degree information of throttle is fed back to engine electronic control unit, and the rotation angle of throttle shaft is converted into electrical signal by non -contact throttle position sensor and input to the electronic control unit of engine.

[0003] The related art designs the non -contact throttle position sensor of Chinese patent with authorized announcement No.CN214666604U, it includes the shell, the installation hole is arranged on one side of shell, the installation cavity is arranged on the other side of shell, the installation hole is not communicated with installation cavity, the rotor is rotatably arranged in installation hole, the outer wall of rotor is separated from the inner wall of installation hole, the magnet is bonded to the end of rotor close to installation cavity, the end of rotor away from installation cavity is provided for throttle shaft, the Hall sensor chip is installed in installation cavity, the Hall sensor chip is oppositely arranged with magnet along the center line direction of installation hole on one side, the circuit board is electrically connected on the other side of Hall sensor chip, the wiring terminal is electrically connected on circuit board, the shielding cover is installed on shell, and the circuit board and Hall sensor chip are covered in installation cavity by shielding cover.Throttle shaft is connected with rotor, when throttle shaft rotates, magnet and Hall sensor chip relatively rotate, so that the magnetic flux passing through Hall sensor chip changes, and the output voltage of Hall sensor chip fed back to engine electronic control unit changes accordingly.

[0004] In the process of realizing the present application, the inventors found that in the prior art at least the following problems exist: in order to prevent the rotor and the shell from being easily worn, the outer wall of the rotor is separated from the inner wall of the installation hole, and since the rotor and the shell are a split structure, the rotor is easily lost before the non -contact throttle position sensor is assembled to the throttle, thereby affecting the normal use of the non -contact throttle position sensor. UTILITY MODEL CONTENTS

[0005] In order to reduce the loss of rotor, the present application provides a kind of throttle micro non -contact position sensor.

[0006] The non -contact throttle position sensor provided by the present application adopts the following technical scheme:

[0007] The application discloses a kind of micro non-contact position sensors for throttle, including shell, the installation cavity is opened in one side of the shell, Hall sensor chip is arranged in the installation cavity, installation hole is opened in the other side of the shell, rotor is inserted in the installation hole, magnet is arranged on the rotor near installation cavity one end, magnet is oppositely arranged with Hall sensor chip, abutment ring plate and limit ring plate are sleeved on the rotor, the abutment ring plate is fixedly connected with the rotor, the limit ring plate is movably connected with the rotor, the limit ring plate is used to abut with the abutment ring plate far from magnet side on magnet side, limit sleeve is jointly sleeved on the abutment ring plate and limit ring plate, the limit ring plate is connected with limit sleeve, limit sleeve is inserted in the installation hole, and the limit sleeve is connected with the installation hole.

[0008] By adopting the above technical scheme, when the shell and the rotor are assembled together, the rotor is inserted into the installation hole first, the magnet is oppositely arranged with the Hall sensor chip, then the limit sleeve and the limit ring plate are sleeved on the rotor, and the limit ring plate is located on the side of the abutment ring plate far from the magnet, and then the limit sleeve is fixed with the shell. When the rotor tends to slide out of the installation hole, the side of the abutment ring plate far from the magnet abuts on the side of the limit ring plate close to the magnet, so that the rotor is prevented from falling out of the installation hole. Before the sensor is assembled to the throttle, the rotor is limited by the limit ring plate, so that the loss caused by the rotor falling out of the installation hole is reduced.

[0009] Preferably, a gap exists between the inner wall of the limit sleeve and the outer wall of the abutment ring plate, a gap exists between the inner wall of the limit sleeve and the outer wall of the rotor, and a gap exists between the inner wall of the limit ring plate and the outer wall of the rotor.

[0010] By adopting the above technical scheme, the abrasion of the rotor and the abutment ring plate during rotation is reduced.

[0011] Preferably, the outer wall of the limit sleeve is provided with an external thread groove, the inner wall of the installation hole is provided with an internal thread groove, and the external thread groove and the internal thread groove are matched with each other.

[0012] By adopting the above technical scheme, the limit sleeve is threadedly connected in the installation hole, and the position of the limit ring plate is adjusted by rotating the limit sleeve, so that the movable range of the abutment ring plate is adjusted.

[0013] Preferably, the limit sleeve comprises a left half ring sleeve and a right half ring sleeve, the left half ring sleeve and the right half ring sleeve are oppositely arranged, the rotor, the abutment ring plate and the limit ring plate are located between the left half ring sleeve and the right half ring sleeve, and the left half ring sleeve and the right half ring sleeve are detachably connected with the limit ring plate.

[0014] By adopting the technical scheme, when the rotor and the throttle shaft are fixed together, the left half ring sleeve and the right half ring sleeve are rotated out of the mounting hole, the limiting sleeve is separated from the shell, then the left half ring sleeve and the right half ring sleeve are separated from each other, and the limiting sleeve is detached from the rotor, thereby reducing the abrasion of the rotor and the abutting ring plate when rotating.

[0015] Preferably, the left half ring sleeve is provided with a positioning groove on the side facing the right half ring sleeve, and the right half ring sleeve is provided with a positioning block fixed on the side facing the left half ring sleeve, and the positioning block is inserted into the positioning groove.

[0016] By adopting the technical scheme, the left half ring sleeve and the right half ring sleeve are connected through the positioning block and the positioning groove, so that the outer wall of the left half ring sleeve and the outer wall of the right half ring sleeve form an external thread groove.

[0017] Preferably, the limiting ring plate comprises a left limiting half ring and a right limiting half ring, the left limiting half ring and the right limiting half ring are oppositely arranged, the rotor is located between the opposite faces of the left limiting half ring and the right limiting half ring, the opposite faces of the left limiting half ring and the right limiting half ring are both fixedly provided with an insertion piece, and the opposite faces of the left half ring sleeve and the right half ring sleeve are both provided with an insertion groove for the insertion piece.

[0018] By adopting the technical scheme, when the left half ring sleeve and the right half ring sleeve are detached from the rotor, the left limiting half ring and the right limiting half ring are separated from each other, the limiting ring plate is detached from the rotor, and the abrasion of the limiting ring plate to the rotor is reduced.

[0019] Preferably, the outer wall of the left limiting half ring and the outer wall of the right limiting half ring are both provided with a flexible layer.

[0020] By adopting the technical scheme, the flexible layer reduces the abrasion of the left limiting half ring and the right limiting half ring to the rotor.

[0021] Preferably, a circuit board is arranged in the mounting cavity, the circuit board is electrically connected with the Hall sensor chip, a wiring terminal is electrically connected to the circuit board, and the wiring terminal penetrates through the shell at the end away from the circuit board.

[0022] By adopting the technical scheme, the circuit board and the wiring terminal realize signal processing and transmission between the Hall sensor chip and the engine electronic control unit.

[0023] Preferably, a shielding cover is arranged on the shell, a shielding space is formed between the shielding cover and the mounting cavity, the circuit board and the Hall sensor chip are located in the shielding space, and the wiring terminal penetrates through the shielding cover.

[0024] By adopting the technical scheme, the shielding cover provides electromagnetic shielding, and the reliability and accuracy of the sensor are improved.

[0025] Preferably, the shielding space is filled with a potting layer, and the outer wall of the circuit board, the outer wall of the Hall sensor chip, the inner wall of the mounting cavity, and the outer wall of the shielding cover are all bonded to the potting layer.

[0026] By adopting the above technical solution, the potting layer fills the shielded space and plays a role in sealing, protecting and fixing it.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By setting up a housing, mounting cavity, Hall sensor chip, mounting hole, rotor, magnet, abutment ring plate, limiting ring plate and limiting sleeve, before the sensor is assembled to the throttle valve, the rotor is restricted by the limiting ring plate through the abutment ring plate, reducing the possibility of the rotor falling out of the mounting hole and being lost;

[0029] 2. By setting a left half-ring sleeve, a right half-ring sleeve, an outer through hole, a left limiting half-ring, a right limiting half-ring, an inner through hole, an insertion piece, and an insertion slot, the limiting sleeve and the limiting ring plate can be disassembled from the housing and the rotor.

[0030] 3. By setting positioning grooves and positioning blocks, it is possible to easily install the limiting sleeve and limiting ring plate between the housing and the rotor. Attached Figure Description

[0031] Figure 1 This is a cross-sectional view of a miniature non-contact position sensor for throttle valve according to an embodiment of this application.

[0032] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0033] Figure 3 This is a cross-sectional view illustrating the connection relationship between the limiting sleeve and the limiting ring plate in the embodiments of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Mounting cavity; 12. Mounting hole; 2. Hall sensor chip; 21. Circuit board; 22. Terminal block; 3. Rotor; 31. Magnet; 32. Abutment ring plate; 4. Limiting sleeve; 41. Left half ring sleeve; 411. Positioning groove; 42. Right half ring sleeve; 421. Positioning block; 5. Limiting ring plate; 51. Left limiting half ring; 52. Right limiting half ring; 53. Flexible layer; 6. External thread groove; 61. Internal thread groove; 7. Insertion piece; 71. Insertion groove; 8. Shielding space; 81. Shielding cover; 82. Encapsulation layer. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0036] The embodiment of the application discloses a micro non-contact position sensor for a throttle valve. Figure 1 The shell 1 is provided with a mounting cavity 11 on one side and a mounting hole 12 on the other side, and the mounting cavity 11 and the mounting hole 12 are not communicated with each other. A Hall sensor chip 2 and a circuit board 21 are mounted in the mounting cavity 11, the circuit board 21 is electrically connected with the Hall sensor chip 2, a wiring terminal 22 is electrically connected to the circuit board 21, and one end of the wiring terminal 22 away from the circuit board 21 penetrates through the shell 1. The circuit board 21 and the wiring terminal 22 realize signal processing and transmission between the Hall sensor chip 2 and an engine electronic control unit. A shielding cover 81 is mounted on the shell 1, a shielding space 8 is formed between the shielding cover 81 and the mounting cavity 11, the circuit board 21 and the Hall sensor chip 2 are located in the shielding space 8, and the wiring terminal 22 penetrates through the shielding cover 81. The shielding cover 81 provides electromagnetic shielding, and improves the reliability and accuracy of the sensor. The shielding space 8 is filled with potting material to form a potting layer 82, the outer wall of the circuit board 21, the outer wall of the Hall sensor chip 2, the inner wall of the mounting cavity 11 and the outer wall of the shielding cover 81 are attached to the potting layer 82, and the potting layer 82 filled in the shielding space 8 plays a sealing, protecting and fixing role. A rotor 3 is inserted into the mounting hole 12, a magnet 31 is mounted on one end of the rotor 3 close to the mounting cavity 11, and the magnet 31 is arranged opposite to the Hall sensor chip 2. The throttle shaft is connected with the rotor 3, when the throttle shaft rotates, the magnet 31 rotates relative to the Hall sensor chip 2, the magnetic flux passing through the Hall sensor chip 2 changes, and thus the output voltage of the Hall sensor chip 2 fed back to the engine electronic control unit changes correspondingly.

[0037] In order to reduce the situation of losing due to the rotor 3 falling out of the mounting hole 12, with reference to Figures 1 to 3The abutting ring plate 32 and the limiting ring plate 5 are sleeved on the rotor 3, a gap exists between the inner ring wall of the limiting sleeve 4 and the outer ring wall of the abutting ring plate 32, a gap exists between the inner ring wall of the limiting sleeve 4 and the outer wall of the rotor 3, and a gap exists between the inner ring wall of the limiting ring plate 5 and the outer wall of the rotor 3, so as to reduce the abrasion of the rotor 3 and the abutting ring plate 32 when rotating. The abutting ring plate 32 is integrally formed with the rotor 3, and the limiting ring plate 5 is movably connected with the rotor 3. The limiting ring plate 5 is located on the side, away from the magnet 31, of the abutting ring plate 32, and the side, close to the magnet, of the limiting ring plate 5 is used for abutting against the side, away from the magnet 31, of the abutting ring plate 32. The limiting sleeve 4 is sleeved on the abutting ring plate 32 and the limiting ring plate 5, and the limiting ring plate 5 is connected with the limiting sleeve 4. The limiting sleeve 4 is inserted into the mounting hole 12, and the limiting sleeve 4 is connected with the mounting hole 12. When the rotor 3 is inserted into the mounting hole 12 and the magnet 31 is oppositely arranged with the Hall sensor chip 2, the limiting sleeve 4 and the limiting ring plate 5 are sleeved on the rotor 3, so that the limiting ring plate 5 is located on the side, away from the magnet 31, of the abutting ring plate 32, and then the limiting sleeve 4 is fixed with the shell 1. When the rotor 3 tends to slide out of the mounting hole 12, the side, away from the magnet 31, of the abutting ring plate 32 abuts against the side, close to the magnet, of the limiting ring plate 5, so as to limit the rotor 3 from falling out of the mounting hole 12. Before the sensor is assembled to the throttle valve, the rotor 3 is limited by the limiting ring plate 5, so as to reduce the loss caused by the rotor 3 falling out of the mounting hole 12.

[0038] In order to realize the detachable connection between the limiting sleeve 4 and the shell 1, with reference to Figures 1 to 3 An outer thread groove 6 is arranged on the outer wall of the limiting sleeve 4, and an inner thread groove 61 is arranged on the inner wall of the mounting hole 12. The outer thread groove 6 and the inner thread groove 61 are matched with each other, so that the limiting sleeve 4 is threadedly connected with the shell 1.

[0039] In order to realize the detachable connection between the limiting sleeve 4 and the rotor 3, with reference to Figures 1 to 3 The limiting sleeve 4 comprises a left half ring sleeve 41 and a right half ring sleeve 42. The left half ring sleeve 41 and the right half ring sleeve 42 are oppositely arranged, and the outer thread groove 6 is arranged on the outer ring wall of the left half ring sleeve 41 and the outer ring wall of the right half ring sleeve 42. The rotor 3, the limiting ring plate 5 and the abutting ring plate 32 are all located between the left half ring sleeve 41 and the right half ring sleeve 42. After the rotor 3 is fixed with the throttle valve shaft, the left half ring sleeve 41 and the right half ring sleeve 42 are rotated out of the mounting hole 12, so that the limiting sleeve 4 is separated from the shell 1. Then the left half ring sleeve 41 and the right half ring sleeve 42 are moved away from each other, and the limiting sleeve 4 is detached from the rotor 3, so as to reduce the abrasion of the rotor 3 and the abutting ring plate 32 when rotating. The left half ring sleeve 41 is provided with a positioning groove 411 on the side, facing the right half ring sleeve 42, of the left half ring sleeve 41, and a positioning block 421 is arranged on the side, facing the left half ring sleeve 41, of the right half ring sleeve 42. The positioning block 421 is used for being inserted into the positioning groove 411. The left half ring sleeve 41 and the right half ring sleeve 42 are connected through the positioning block 421 and the positioning groove 411, so as to facilitate the left half ring sleeve 41 and the right half ring sleeve 42 to form the outer thread groove 6 on the outer ring wall of the left half ring sleeve 41 and the outer ring wall of the right half ring sleeve 42.

[0040] In order to achieve the effect of detachable connection of the limiting ring plate 5 and the rotor 3, referring to Figures 1 to 3 , the limiting ring plate 5 includes a left limiting half ring 51 and a right limiting half ring 52, the left limiting half ring 51 and the right limiting half ring 52 are oppositely arranged, and the rotor 3 is located between the opposite faces of the left limiting half ring 51 and the right limiting half ring 52. The outer wall of the left limiting half ring 51 and the outer wall of the right limiting half ring 52 are wrapped with a flexible layer 53 of rubber material, which reduces the wear of the rotor 3 by the left limiting half ring 51 and the right limiting half ring 52. The left limiting half ring 51 is detachably connected with the left half ring sleeve 41, and the right limiting half ring 52 is detachably connected with the right half ring sleeve 42. When the left half ring sleeve 41 and the right half ring sleeve 42 are detached from the rotor 3, the left limiting half ring 51 and the right limiting half ring 52 are separated from each other, and the limiting ring plate 5 is detached from the rotor 3.

[0041] In order to achieve the effect of detachable connection of the limiting ring plate 5 and the limiting sleeve 4, referring to Figures 1 to 3 , the opposite faces of the left limiting half ring 51 and the right limiting half ring 52 are provided with the inserted piece 7, and the opposite faces of the left half ring sleeve 41 and the right half ring sleeve 42 are provided with the inserted slot 71 for inserting the inserted piece 7. The left limiting half ring 51 and the left half ring sleeve 41 are detachably connected, and the right limiting half ring 52 and the right half ring sleeve 42 are detachably connected.

[0042] The implementation principle of the micro non-contact position sensor for the throttle valve in the embodiment of the application is as follows: after the rotor 3 is inserted into the mounting hole 12 and the magnet 31 is oppositely arranged with the Hall sensor chip 2, first, the limiting sleeve 4 is connected with the limiting ring plate 5, then the limiting sleeve 4 and the limiting ring plate 5 are sleeved on the rotor 3, so that the limiting ring plate 5 is located on the side of the abutting ring plate 32 away from the magnet 31, and then the limiting sleeve 4 is fixed with the shell 1. When the rotor 3 tends to slide out of the mounting hole 12, the side of the abutting ring plate 32 away from the magnet 31 abuts on the side of the limiting ring plate 5 close to the magnet, thereby limiting the rotor 3 from falling out of the mounting hole 12. Before the sensor is assembled to the throttle valve, the rotor 3 is limited by the limiting ring plate 5, thereby reducing the loss caused by the rotor 3 falling out of the mounting hole 12. After the rotor 3 is fixedly connected with the throttle valve shaft, the limiting ring plate 5 and the limiting sleeve 4 are detached from between the rotor 3 and the shell 1, so that the outer wall of the rotor 3 is spaced apart from the inner wall of the mounting hole 12, thereby reducing the wear between the rotor 3 and the shell 1.

[0043] The above are preferred embodiments of the application, which do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A micro non-contact position sensor for a throttle valve, comprising a housing, an installation cavity is formed on one side of the housing, a Hall sensor chip is arranged in the installation cavity, an installation hole is formed on the other side of the housing, a rotor is inserted into the installation hole, a magnet is arranged on the rotor close to one end of the installation cavity, and the magnet is arranged opposite to the Hall sensor chip, characterized in that: The rotor is sleeved with an abutting ring plate and a limiting ring plate, the abutting ring plate is fixedly connected with the rotor, the limiting ring plate is movably connected with the rotor, the limiting ring plate is close to the magnet side and is used for abutting with the side of the abutting ring plate away from the magnet, the abutting ring plate and the limiting ring plate are jointly sleeved with a limiting sleeve, the limiting ring plate is connected with the limiting sleeve, the limiting sleeve is inserted into the mounting hole, and the limiting sleeve is connected with the mounting hole.

2. A micro non-contact position sensor for a throttle valve according to claim 1, characterized by: The gap exists between the inner ring wall of the limiting sleeve and the outer ring wall of the abutting ring plate, the gap exists between the inner ring wall of the limiting sleeve and the outer wall of the rotor, and the gap exists between the inner ring wall of the limiting ring plate and the outer wall of the rotor.

3. A micro non-contact position sensor for a throttle valve according to claim 1, characterized by: The outer ring wall of the limiting sleeve is provided with an outer thread groove, the inner wall of the mounting hole is provided with an inner thread groove, and the outer thread groove and the inner thread groove are matched with each other.

4. A micro non-contact position sensor for a throttle valve according to claim 3, characterized by: The limiting sleeve comprises a left half ring sleeve and a right half ring sleeve, the left half ring sleeve and the right half ring sleeve are oppositely arranged, the rotor, the abutting ring plate and the limiting ring plate are located between the left half ring sleeve and the right half ring sleeve, and the left half ring sleeve and the right half ring sleeve are detachably connected with the limiting ring plate.

5. A micro non-contact position sensor for a throttle valve according to claim 4, characterized by: The left half ring sleeve is provided with a positioning groove on the side facing the right half ring sleeve, and the right half ring sleeve is fixedly provided with a positioning block on the side facing the left half ring sleeve.

6. A micro non-contact position sensor for a throttle valve according to claim 4, characterized by: The limiting ring plate comprises a left limiting half ring and a right limiting half ring, the left limiting half ring and the right limiting half ring are oppositely arranged, the rotor is located between the opposite faces of the left limiting half ring and the right limiting half ring, the opposite faces of the left limiting half ring and the right limiting half ring are fixedly provided with inserting pieces, and the opposite faces of the left half ring sleeve and the right half ring sleeve are provided with inserting grooves for the inserting pieces.

7. A micro non-contact position sensor for a throttle valve according to claim 6, characterized by: The outer walls of the left limiting half ring and the right limiting half ring are provided with flexible layers.

8. The micro non-contact position sensor for a throttle valve according to claim 1, characterized by: The mounting cavity is provided with a circuit board, the circuit board is electrically connected with the Hall sensor chip, the circuit board is electrically connected with a wiring terminal, and the end of the wiring terminal away from the circuit board penetrates through the shell.

9. A micro non-contact position sensor for a throttle valve according to claim 8, characterized by: The shell is provided with a shielding cover, a shielding space is formed between the shielding cover and the mounting cavity, the circuit board and the Hall sensor chip are located in the shielding space, and the wiring terminal penetrates through the shielding cover.

10. A micro non-contact position sensor for a throttle valve according to claim 9, characterized by: The shielding space is filled with a filling layer, and the outer wall of the circuit board, the outer wall of the Hall sensor chip, the inner wall of the mounting cavity and the outer wall of the shielding cover are attached to the filling layer.

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