Brake pad wear sensor
By introducing an active module and a resistance module into the brake pad wear sensor, changes in current signals are generated and transmitted to the ECU, solving the problem that existing technologies cannot detect different stages of brake pad wear, and realizing real-time monitoring and display of brake pad wear status.
Patent Information
- Application Number
- CN202520120167.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing brake pad wear sensors can only trigger an alarm when the wear reaches a preset limit, and cannot detect and transmit status signals of different wear stages of the brake pads, making it impossible for users to plan the replacement time in advance.
Design a brake pad wear sensor that uses a combination of a moving module and a resistor module. The resistor module generates a current signal that changes with the wear displacement, and combined with chip components, transmits current signals of different magnitudes to the ECU to achieve the detection and display of different wear states.
It enables real-time monitoring and display of brake pad wear, helping users understand the wear condition in advance and improving the predictability of brake pad replacement.
Smart Images
Figure CN223498515U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brake pad detection devices, specifically to a vehicle brake pad wear sensor. Background Technology
[0002] Existing brake pad wear sensors typically detect when brake pads wear down to a certain extent and reach a preset limit. The natural loop of the sensing wire is broken, and this signal is converted into an electrical signal for transmission. This signal is then received by the vehicle's ECU (Electronic Control Unit), triggering the warning light to illuminate. However, these brake pad wear sensors can only transmit the signal when the brake pads have worn down to the preset limit. They cannot detect and transmit wear status signals at different stages of brake pad wear, preventing users from planning when to replace brake pads in advance. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology.
[0004] A brake pad wear sensor is provided to detect and transmit wear status signals of brake pads at different wear stages.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a brake pad wear sensor, comprising a housing, an installation cavity within the housing, a detection element and a transmission element within the installation cavity, the transmission element extending outside the housing and linked to a data line for transmitting data, characterized in that: the detection element comprises a movable module that abuts against the brake pad and moves with the wear of the brake pad, and a resistor module that cooperates with the movable module to generate a current signal that changes with the displacement of the movable module, the resistor module being electrically connected to the transmission element.
[0006] A further feature of this invention is that the movable module includes an abutment rod, one end of which extends outside the housing and has an abutment end for abutting with the brake pad. A limiting flange is provided in the middle of the abutment rod. A contact mounting seat is fitted onto the side of the limiting flange opposite to the abutment end. A spring is fitted onto the side of the contact mounting seat opposite to the limiting flange. The spring abuts against the contact mounting seat and the inner wall of the mounting cavity, respectively. The contact mounting seat abuts against the limiting flange. The contact mounting seat is provided with a first contact piece and a second contact piece capable of conducting electricity, and the first contact piece and the second contact piece are electrically connected.
[0007] A further feature of this invention is that the resistor module includes a plurality of resistors arranged in sequence and a conductive strip disposed on one side of each resistor. Each resistor is disposed on a conductive connecting strip. The connecting strip is electrically connected to the data line. The first contact piece passes through each resistor in sequence as the abutment rod moves. The second contact piece is always in contact with the conductive strip, and the second contact piece moves on the conductive strip as the abutment rod moves.
[0008] The present invention, which has the above features, comprises a resistor, a first contact, a second contact, and a conductive strip forming a circuit. The first contact and the second contact move with the contact mounting seat. When the first contact passes through each resistor, the resistance value changes due to the different number of resistors it passes through, thereby generating a current signal of different magnitude, which in turn indicates different brake pad wear conditions.
[0009] A further feature of this invention is that the transmission element includes a chip element for transmitting signals, the chip element is electrically connected to a conductive strip, and the chip element is electrically connected to a data line.
[0010] The present invention, which has the above-mentioned features, transmits different magnitude current signals generated by the conductive strip, resistor, first contact and second contact through the data line to the vehicle's ECU for receiving and generating different display signal information, so that the user can understand the wear status of the brake pads.
[0011] A further feature of this invention is that the resistor and the connecting strip are disposed on the same substrate.
[0012] A further feature of this invention is that the resistor, connecting strip, and conductive strip are disposed on the same substrate.
[0013] A further feature of this invention is that the resistor, connecting strip, conductive strip, and chip element are disposed on the same substrate.
[0014] The present invention, which has the above-mentioned features, increases the integration of resistors, connecting strips, conductive strips, and chip components, and reduces the installation space required.
[0015] The beneficial effects of this utility model are as follows: the resistor, the first contact, the second contact, and the conductive strip form a circuit. The first contact and the second contact move with the contact mounting seat. When the first contact passes through each resistor, the resistance value changes due to the different number of resistors it passes through, thus generating a current signal of different magnitudes, which in turn indicates different brake pad wear conditions. The chip element transmits the current signal to the vehicle's ECU via the data line, which receives and generates different display signal information, allowing the user to understand the brake pad wear condition.
[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description
[0017] Figure 1 This is a partial cross-sectional schematic diagram of an embodiment of the present utility model.
[0018] Figure 2 This is a schematic diagram of a substrate structure comprising a resistor, a connecting strip, a conductive strip, and a chip element, according to an embodiment of the present invention.
[0019] Figure 3 This is a three-dimensional schematic diagram of the contact mounting base according to an embodiment of the present utility model. Detailed Implementation
[0020] like Figure 1 —— Figure 3A brake pad wear sensor is shown, comprising a housing 1, an installation cavity 2 within the housing 1, a detection element and a transmission element within the installation cavity 2, and a data line 3 for transmitting data extending outside the housing. The detection element includes a movable module that abuts against the brake pad and moves with the wear of the brake pad, and a resistor module that cooperates with the movable module to generate a current signal change with the movement of the movable module. The resistor module is electrically connected to the transmission element. The movable module includes a contact rod 4, one end of which extends outside the housing 1 and has a contact end 401 for abutting against the brake pad. A limiting flange 5, which is a retaining spring, is provided in the middle of the contact rod 4. 4. A contact mounting base 6 is sleeved on the side of the limiting flange 5 opposite to the abutting end 401. A spring 7 is sleeved on the side of the contact mounting base 6 opposite to the limiting flange 5. The spring 7 abuts against the contact mounting base 6 and the inner wall of the mounting cavity 2. The contact mounting base 6 abuts against the limiting flange 5. The contact mounting base 6 is provided with a first contact piece 601 and a second contact piece 602 that can conduct electricity. The first contact piece 601 and the second contact piece 602 are electrically connected. The resistor module includes a plurality of resistors 8 arranged in sequence and a conductive strip 9 disposed on one side of each resistor 8. Each resistor 8 is disposed on a conductive connecting strip 10. The connecting strip 10 is electrically connected to the data line 3. The first contact piece 601 As the abutment rod 4 moves, it passes through each resistor 8 in sequence. The second contact piece 602 always abuts against the conductive strip 9, and the second contact piece 602 moves along the conductive strip 9 with the abutment rod 4. The transmission element includes a chip element 11 for transmitting signals. The chip element 11 is electrically connected to the conductive strip 9 and the data line 4. The resistors 8 and the connecting strip 9 are disposed on the same substrate 12. Alternatively, the resistors 8, the connecting strip 10, and the conductive strip 9 can be disposed on the same substrate 12, or the resistors 8, the connecting strip 10, the conductive strip 9, and the chip element 11 can be disposed on the same substrate 12. Most preferably, the resistors 8, the connecting strip 10, the conductive strip 9, and the chip element 11 are disposed on the same substrate 12. To improve integration and reduce installation space, the housing 1 has a mounting groove 13 that communicates with the mounting cavity 2. The substrate 12, which integrates resistors 8, connecting strips 10, conductive strips 9, and chip elements 11, is embedded in the mounting groove 13. Resistors 8, first contacts 601, second contacts 602, and conductive strips 9 form a circuit. The first contacts 601 and second contacts 602 move with the contact mounting base 6. When the first contact 601 passes through each resistor, the resistance value changes due to the different number of resistors 8 it passes through, thus generating different current signals, which in turn indicate different brake pad wear conditions. The chip elements 11 transmit the current signals to the vehicle's ECU via the data line to receive and generate different display signal information, allowing the user to understand the brake pad wear condition.
Claims
1. A brake pad wear sensor, comprising a housing, an installation cavity within the housing, a detection element and a transmission element disposed within the installation cavity, the transmission element extending outside the housing and linked to a data line for transmitting data, characterized in that: The detection element includes a movable module that abuts against the brake pad and moves as the brake pad wears, and a resistor module that works with the movable module to generate a current signal that changes as the movable module moves. The resistor module is electrically connected to the transmission element.
2. A brake pad wear sensor according to claim 1, characterized in that: The active module includes an abutment rod, one end of which extends outside the housing and has an abutment end for abutting with the brake pad. The abutment rod has a limiting flange in the middle. A contact mounting seat is sleeved on the side of the limiting flange opposite to the abutment end. A spring is sleeved on the side of the contact mounting seat opposite to the limiting flange. The spring abuts against the contact mounting seat and the inner wall of the mounting cavity, respectively. The contact mounting seat abuts against the limiting flange. The contact mounting seat is provided with a first contact piece and a second contact piece that can conduct electricity. The first contact piece and the second contact piece are electrically connected.
3. A brake pad wear sensor according to claim 2, characterized in that: The resistor module includes a plurality of resistors arranged in sequence and a conductive strip disposed on one side of each resistor. Each resistor is disposed on a conductive connecting strip. The connecting strip is electrically connected to the data line. The first contact piece passes through each resistor in sequence as the abutment rod moves. The second contact piece is always in contact with the conductive strip and moves on the conductive strip as the abutment rod moves.
4. A brake pad wear sensor according to claim 1 or 3, characterized in that: The transmission element includes a chip element for transmitting signals, the chip element being electrically connected to a conductive strip and a data line.
5. A brake pad wear sensor according to claim 3, characterized in that: The resistor and connecting strip are mounted on the same substrate.
6. A brake pad wear sensor according to claim 5, characterized in that: The resistor, connecting strip, and conductive strip are disposed on the same substrate.
7. A brake pad wear sensor according to claim 6, characterized in that: The resistor, connecting strip, conductive strip, and chip element are disposed on the same substrate.