Sensor unit and control system

Abstract

A sensor unit and a control system, the sensor unit comprising: a housing at least partially enclosing to form an accommodating space; the circuit board is positioned in the accommodating space, and the circuit board is configured to receive or send an electric signal; the at least one lead wire is electrically connected with the circuit board, and the lead wire extends to the outside of the accommodating space; wherein the shell is provided with a sealing part, the sensor unit further comprises a sealing piece, and the sealing part, the sealing piece and the lead are matched with one another to seal the containing space.

Description

Technical Field

[0001] The utility model relates to a sensor unit and a control system, and more specifically, to a sensor unit with better sealing performance and a control system including the sensor unit. Background Art

[0002] The sensor unit converts the sensed signal into an electrical signal and then transmits the electrical signal through a lead wire. Since the lead wire passes from the inside of the sensor unit to the outside of the sensor unit, it is inevitably necessary to open an opening in the housing of the sensor unit. In the prior art, external dust and other foreign matters may enter the inside of the sensor unit through the opening in the housing, which has an adverse effect on the sensor unit.

[0003] For this reason, it is desirable to propose a sensor unit to improve the defects in the above prior art. Summary of the Utility Model

[0004] According to a first aspect of the present utility model, there is provided a sensor unit, comprising: a housing that at least partially surrounds to form an accommodation space; a circuit board located within the accommodation space, the circuit board being configured to receive or transmit electrical signals; at least one lead wire electrically connected to the circuit board, the lead wire extending to the outside of the accommodation space; wherein, the housing has a sealing portion, and the sensor unit further includes a sealing member, and the sealing portion, the sealing member and the lead wire cooperate with each other to seal the accommodation space.

[0005] According to this solution, the sealing portion of the housing and the sealing member together enclose the accommodation space, so that the sensor unit has good sealing performance, and external dust and other foreign matters will not enter the inside of the sensor unit, thereby improving the reliability and stability of the sensor unit.

[0006] In some solutions, the accommodation space may be filled with potting glue.

[0007] According to this solution, the potting glue can further improve the sealing performance of the sensor unit, further prevent external dust and other foreign matters from entering the inside of the sensor unit, thereby further improving the reliability and stability of the sensor unit.

[0008] In some solutions, the sealing portion may have a plate-shaped first main body and at least one groove recessed from the first main body in a first direction, the sealing member may have a plate-shaped second main body and at least one protrusion protruding from the second main body toward the groove, and each of the at least one protrusions is inserted into the corresponding groove.

[0009] In some solutions, a section of each of the at least one lead wires may extend in a second direction in the corresponding groove, and the second direction is perpendicular to the first direction.

[0010] In some embodiments, the inner side of the groove facing away from the seal may have a first pit, and a part of each section of at least one lead extends in the corresponding first pit.

[0011] In some embodiments, the side of the protrusion facing the groove may have a second pit, and another part of each section of at least one lead extends in the corresponding second pit.

[0012] According to this embodiment, a part of the lead is stuck in the first pit of the sealing part, and another part is stuck in the second pit of the seal, so that the lead is fixed more reliably.

[0013] In some embodiments, the seal may have a hook at its end in the third direction, and the sealing part may have a slot at its end in the third direction. The hook cooperates with the corresponding slot, and the third direction is perpendicular to the first direction and the second direction.

[0014] According to this embodiment, by the cooperation of the hook and the slot, the seal can be easily assembled onto the sealing part of the housing.

[0015] In some embodiments, the side of the second body opposite to the protrusion may have a recess, and the recess is aligned with the protrusion in the first direction.

[0016] In some embodiments, the seal may have a uniform thickness along the first direction.

[0017] According to this embodiment, by designing a uniform thickness for the seal, the deformation of the seal during the injection molding process can be reduced. In addition, the recess also reduces the raw materials required for manufacturing the seal, saving the manufacturing cost.

[0018] In some embodiments, the side of the sealing part away from the circuit board along the second direction may have a receiving portion configured to receive potting glue.

[0019] According to this embodiment, during the potting operation, the excess potting glue can enter the receiving portion, avoiding overflowing to the outside of the sensor unit.

[0020] In some embodiments, the sensor unit may be configured to sense the operating parameters of the motor.

[0021] In some embodiments, the sensor unit may further include an assembly hole, and the shaft of the motor is installed in the assembly hole.

[0022] According to the second aspect of the present utility model, a control system is provided, including the sensor unit according to the first aspect of the present utility model; an electronic controller electrically connected to the circuit board of the sensor unit through leads.

[0023] In some embodiments, the sensor unit includes a sensor, and the sensor may be an eddy current motor position sensor. Description of the Drawings

[0024] Figure 1 A schematic diagram of a control system according to an embodiment of the present invention is shown;

[0025] Figure 2 shows Figure 1 a partial schematic diagram of [], in which the seal is removed;

[0026] Figure 3 shows Figure 1 a partial schematic diagram of [], in which the seal and the lead are removed;

[0027] Figure 4 A schematic diagram of a seal according to an embodiment of the present invention is shown;

[0028] Figure 5 A schematic diagram of the cooperation between the seal and the sealing part according to an embodiment of the present invention is shown;

[0029] Figure 6 A cross-sectional view of the sealing part according to an embodiment of the present invention is shown.

[0030] List of Reference Numerals:

[0031] 10 Control system

[0032] 100 Sensor unit

[0033] 110 Housing

[0034] 120 Sealing part

[0035] 122 First main body

[0036] 124 Groove

[0037] 125 First pit

[0038] 126 Card slot

[0039] 128 Accommodating part

[0040] 130 Circuit board

[0041] 140 Lead

[0042] 150 Seal

[0043] 152 Second main body

[0044] 154 Protrusion

[0045] 155 Second pit

[0046] 156 Hook

[0047] 158 Recess

[0048] 160 Assembly Hole

[0049] 200 Electronic Controller

[0050] S Accommodating Space Detailed Implementation Manner

[0051] In order to make the objectives, solutions, and advantages of the technical solution of the present utility model clearer, the technical solution of the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings of the specific embodiments of the present utility model. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.

[0052] For clearer description, unless otherwise clearly specified, the meanings of the orientation terms appearing in this article are as follows: The first direction refers to the recessed direction of the groove or the protruding direction of the protruding portion, the second direction refers to the extending direction of the lead wire in the sealing portion and the sealing member, and the third direction refers to the direction perpendicular to both the first direction and the second direction.

[0053] Figure 1 A schematic diagram of a control system 10 according to an embodiment of the present utility model is shown. The control system 10 mainly includes a sensor unit 100 and an electronic controller 200. The electronic controller 200 receives signals from the sensor unit 100 and performs corresponding operations in response to the received signals.

[0054] The sensor unit 100 mainly includes a housing 110, a circuit board 130, and a lead wire 140. The housing 110 at least partially surrounds to form an accommodating space S. The circuit board 130 is located in the accommodating space S and is configured to receive or transmit electrical signals obtained by the sensor. The lead wire 140 extends from the circuit board 130 through the housing 110 to the electronic controller 200 to transmit the sensed signals received by the circuit board 130 to the electronic controller 200.

[0055] Since the lead wire 140 passes from the inside of the sensor unit 100 to the outside of the sensor unit 100, it is inevitably necessary to open an opening in the housing 110 of the sensor unit 100. In the prior art, external dust and other foreign matters may enter the inside of the sensor unit 100 through the opening in the housing 110, which has an adverse effect on the sensor unit 100. For this reason, as Figure 2 and Figure 5As shown, the housing 110 has a sealing portion 120, and the sensor unit 100 further includes a seal 150. The sealing portion 120, the seal 150, and the lead 140 cooperate with each other to seal the accommodation space S. The sealing portion 120 and the seal 150 together enclose the accommodation space S, so that the sensor unit 100 has good sealing performance, and foreign matters such as dust from the outside will not enter the inside of the sensor unit 100, thereby improving the reliability and stability of the sensor unit 100.

[0056] Preferably, the accommodation space S can be filled with potting glue. The potting glue can further improve the sealing performance of the sensor unit 100, further prevent foreign matters such as dust from the outside from entering the inside of the sensor unit 100, thereby further improving the reliability and stability of the sensor unit 100.

[0057] Specifically, the sealing portion 120 may have a plate-shaped first body 122 and at least one groove 124 recessed from the first body 122 in a first direction (for example, Figure 5 the downward direction shown). The seal 150 may have a plate-shaped second body 152 and at least one protrusion 154 protruding from the second body 152 toward the groove 124 (as Figure 4 shown). Each of the at least one protrusions 154 is inserted into a corresponding groove 124. A section of each of the at least one leads 140 may extend in a second direction (for example, Figure 5 the direction perpendicular to the paper plane shown) in the corresponding groove 124 to transmit the electrical signal received by the circuit board 130 to the electronic controller 200. It should be understood that although Figure 5 and Figure 6 show six protrusions 154, six grooves 124, and six leads 140, the present utility model is not intended to limit the specific number of the protrusions 154, the grooves 124, and the leads 140, and any other suitable number of the protrusions 154, the grooves 124, and the leads 140 can be set according to specific application requirements.

[0058] Preferably, the inner side (for example, Figure 5 the lower side shown) of the groove 124 facing away from the seal 150 may have a first pit 125, and the side (for example, Figure 5 the lower side shown) of the protrusion 154 facing the groove 124 may have a second pit 155. A part (for example, Figure 5 the lower part shown) of a section of each of the at least one leads 140 extends in the corresponding first pit 125, while the other part (for example, Figure 5The upper portion shown extends in the corresponding second recess 155. A part of the lead 140 is stuck in the first recess 125 of the sealing portion 120, and another part is stuck in the second recess 155 of the seal 150. The lead 140 is clamped between the first body 122 of the sealing portion 120 and the protruding portion 154 of the seal 150, so that the lead 140 is more reliably fixed and the sealing performance of the sensor unit 100 is further improved.

[0059] More preferably, the first recess 125 may have a circular cross-section, the diameter of the first recess 125 is slightly smaller than the diameter of the lead 140, and the center position of the first recess 125 is closer to the inside of the sensor unit 100 compared to the center position of the lead 140 (for example, Figure 5 the center position of the first recess 125 shown is lower than the center position of the lead 140). Through the press fit between the lead 140 and the first recess 125, the fixing of the lead 140 in the first recess 125 can be made more reliable, and the unwanted displacement of the lead 140 inside the sensor unit 100 can be avoided.

[0060] Preferably, the end of the seal 150 in the third direction (for example, Figure 5 the left-right direction shown) may have a hook 156, and the end of the sealing portion 120 in the third direction may have a slot 126, and the hook 156 cooperates with the corresponding slot 126. Through the cooperation between the hook 156 and the slot 126, the seal 150 can be easily assembled onto the sealing portion 120 of the housing 110.

[0061] Preferably, the side of the second body 152 opposite to the protruding portion 154 (for example, Figure 5 the upper side shown) may have a recess 158, and the recess 158 is aligned with the protruding portion 154 in the first direction. By designing the size of the recess 158, the seal 150 can have a uniform thickness in the first direction, and the uniform thickness of the seal 150 can reduce the deformation of the seal 150 during the injection molding process. In addition, the recess 158 also reduces the raw materials required for manufacturing the seal 150, saving the manufacturing cost.

[0062] Preferably, the side of the sealing portion 120 away from the circuit board 130 in the second direction (for example, Figure 2 the right side shown) may have a receiving portion 128, and the receiving portion 128 is configured to receive potting glue. During the potting operation, the excess potting glue can enter the receiving portion 128, avoiding overflowing to the outside of the sensor unit 100.

[0063] The sensor unit 100 includes sensors capable of converting other signals (such as position signals, speed signals, acceleration signals, force signals, thermal signals, etc.) into electrical signals. The sensors can be, for example, eddy current motor position sensors. The sensor unit 100 of the present utility model can be particularly applied in a vehicle to sense the operating parameters of the motor (such as the position and speed of the rotor, etc.). Specifically, the sensor unit 100 can further include an assembly hole 160, and the shaft of the motor is installed in the assembly hole 160. It should be understood that the present utility model is not intended to limit the specific type of the sensor, but is intended to include any sensor that needs to transmit the electrical signals inside the sensor unit 100 through the lead 140.

[0064] The present utility model has been described in detail with reference to preferred embodiments and various exemplary embodiments. However, those skilled in the art can understand that without departing from the concept of the present utility model, various modifications and changes can be made to the above specific embodiments, and various technical features and structures proposed by the present utility model can be combined without exceeding the protection scope of the present utility model. The protection scope of the present utility model is determined by the appended claims.

Claims

1. A sensor unit, characterized in that: include: A housing at least partially surrounds and forms a receiving space; A circuit board is located in the accommodation space, and the circuit board is configured to receive or send an electrical signal; at least one lead wire, electrically connected to the circuit board, the lead wire extending to the outside of the accommodation space; Wherein, the housing has a sealing portion, the sensor unit further comprises a sealing member, and the sealing portion, the sealing member and the lead cooperate with each other to seal the accommodation space; And wherein, the sealing portion has a plate-shaped first body and at least one groove recessed from the first body along a first direction, the sealing member has a plate-shaped second body and at least one protrusion protruding from the second body toward the groove, each of the at least one protrusion being inserted into a corresponding groove.

2. The sensor unit according to claim 1, characterized in that The accommodating space is filled with potting glue.

3. The sensor unit according to claim 2, characterized in that A section of each of the at least one lead extends in a corresponding groove along a second direction, the second direction being perpendicular to the first direction.

4. The sensor unit according to claim 3, characterized in that The inner side of the groove facing away from the seal has a first recess, and a portion of a section of each of the at least one lead extends in the corresponding first recess.

5. The sensor unit according to claim 4, characterized in that The protrusion has a second recess on one side facing the groove, and another portion of each of the sections of the at least one lead extends in the corresponding second recess.

6. The sensor unit according to claim 3, characterized in that The sealing member has a hook at the end in the third direction, the sealing portion has a slot at the end in the third direction, the hook cooperates with the corresponding slot, and the third direction is perpendicular to the first direction and the second direction.

7. The sensor unit according to claim 1, characterized in that The second body has a recessed portion on a side opposite to the protruding portion, and the recessed portion is aligned with the protruding portion in the first direction.

8. The sensor unit according to claim 7, characterized in that The sealing member has a uniform thickness along the first direction.

9. The sensor unit according to claim 3, characterized in that The sealing portion has a receiving portion on one side away from the circuit board along the second direction, and the receiving portion is configured to receive the potting glue.

10. The sensor unit according to claim 1, characterized in that The sensor unit is configured to sense an operating parameter of the motor.

11. The sensor unit according to claim 10, characterized in that It also includes an assembly hole, in which the shaft of the motor is installed.

12. A control system, characterized in that: include: The sensor unit according to any one of claims 1 to 11; An electronic controller is electrically connected to the circuit board of the sensor unit through the lead wires.

13. The control system according to claim 12, characterized in that: The sensor unit includes a sensor, which is an eddy-current motor position sensor.

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