Device and system for detecting friction performance of brake friction plate

Abstract

The utility model discloses a device and a system for detecting the friction performance of a brake friction plate in the technical field of brake friction plate detection. The device comprises a rotary friction mechanism, a load mechanism, a heating mechanism, an air cooling mechanism and a detection mechanism. According to the brake friction plate friction performance detection device and system provided by the utility model, the load mechanism can transversely shift along with the stress of the friction plate, so that the mechanical sensor can more accurately measure the friction force of the detected friction plate, and the detection result is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to brake friction plate detection technical field, concretely relates to a brake friction plate friction performance detection device and system. BACKGROUND

[0002] The automobile brake assembly is an important assembly for driving safety, and the automobile brake is composed of a shell, a piston and a friction plate and the like, wherein the friction plate is a key component on the friction braking device. The friction performance of the friction material in the friction plate is one of the key factors directly determining the braking effect of the automobile. Due to its use environment and special purpose, it must have a good friction coefficient and wear resistance, and at the same time have a certain heat resistance and mechanical strength, so as to meet the performance requirements of the transmission and braking of the vehicle or the machine, and the detection result will also be used as a very important safety index in the automobile safety test. At the same time, the accuracy of the test result, the collection and statistics of the test result data, and the convenience of the test device are regarded as the pursuit target of the user of the automobile safety test. The existing detection device cannot accurately simulate the actual use of the friction plate, and the structure of the device itself affects the test result of the force sensor, which will directly affect the experimental result. UTILITY MODEL CONTENT

[0003] The utility model discloses a brake friction plate friction performance detection device and system, which can accurately simulate the actual use of the friction plate, and the structure of the device can float, so as to avoid affecting the test result of the force sensor and ensure the accuracy of the experimental result.

[0004] In order to achieve the above-mentioned purpose, the utility model is adopted The technical scheme is as follows:

[0005] On the one hand, the utility model provides a brake friction plate friction performance detection device, which comprises a rotating friction mechanism, a load mechanism, a heating mechanism, an air cooling mechanism and a detection mechanism.

[0006] The heating mechanism and the air cooling mechanism are both installed on the rotating friction mechanism, and are used for heating or cooling on the rotating friction mechanism.

[0007] The load mechanism comprises a base, a load cylinder, a pre-friction cylinder, a lever support, a lever piece, an adjustable height supporting device, a friction plate fixing seat, a height adjusting rod and a cylinder mounting seat, the cylinder mounting seat is installed on the base, the load cylinder is installed on the cylinder mounting seat, the load cylinder can move horizontally relative to the cylinder mounting seat, the supporting device is vertically connected to the working end of the load cylinder, and the load cylinder and the supporting device are coaxial, and the friction plate fixing seat is installed on the top end of the supporting device.

[0008] The lever support and the pre-friction cylinder are both installed on the base, and the lever support, the load cylinder and the pre-friction cylinder are collinear, the height adjusting rod is connected to the working end of the pre-friction cylinder, and the pre-friction cylinder is coaxial with the height adjusting rod, one end of the lever piece is hinged to the upper end of the height adjusting rod, the other end is hinged to the lever support, the middle part of the lever piece in the horizontal direction is hinged to the support device, and the pivot shaft can move horizontally, and the pre-friction cylinder can transmit the pulling force to the friction piece fixing seat through the lever;

[0009] During the test, the upper surface of the friction piece is fixed at the bottom of the friction piece fixing seat, and the lower surface is in contact with the rotating friction mechanism, and when the friction piece is in friction, the mechanism composed of the friction piece fixing seat, the support device and the load cylinder can move horizontally under the action of the friction force of the friction piece;

[0010] The detection mechanism is installed on the load mechanism and the rotating friction mechanism, and is used for detecting the pressure applied to the friction piece, the friction force between the friction piece and the rotating friction mechanism, and the temperature of the rotating friction mechanism.

[0011] Further, the rotating friction mechanism comprises a servo motor, a shaft coupling, a rotating drum and a support bearing;

[0012] The rotating drum comprises a rotating drum body and a rotating drum shaft, wherein the rotating drum shaft is installed on the non-working side of the rotating drum body and is coaxial with the rotating drum body; the rotating drum shaft passes through the support bearing, and the support bearing is supported on the test bench; the rotating drum is connected with the servo motor through the shaft coupling, and the rotating drum, the shaft coupling and the servo motor are coaxial, and the servo motor is used to drive the shaft coupling to rotate, thereby driving the rotating drum to rotate.

[0013] Further, the detection mechanism comprises a first force sensor, a second force sensor and a thermocouple, wherein the first force sensor is installed on the support device and is used for measuring the load applied to the friction piece, the second force sensor is installed on one side of the friction piece fixing seat and is used for measuring the friction force, and when the friction piece fixing seat is displaced under force, it moves away from the second force sensor, and the thermocouple is installed on the outer curved surface of the rotating drum and is used for measuring the temperature.

[0014] Further, the rotating friction mechanism further comprises a positioning bearing, the rotating drum shaft passes through the positioning bearing, and the positioning bearing is supported on the test bench, and the positioning bearing is located between the support bearing and the rotating drum body in the transverse direction.

[0015] Further, the load mechanism further comprises a floating rod and a support plate, the support plate is installed at both ends of the friction piece fixing seat, one end of the floating rod is hinged to the workbench, the other end is hinged to the support plate, and the second force sensor is installed on the outer side of the support plate.

[0016] Further, the heating mechanism comprises an electric heating pipe.

[0017] Further, the air cooling mechanism comprises an air pipe, a blower and an air outlet adjusting plate; the rotary friction mechanism further comprises an outer cover, the outer cover is sleeved on the outer side of the rotary drum, the outlet of the air pipe is connected to the air inlet of the blower, the inlet is installed on the outer cover and faces the outer curved surface of the rotary drum body, and the air outlet adjusting plate is installed outside the inlet of the air pipe and is used for adjusting the air volume.

[0018] Further, a controller is further included and is in communication connection with the servo motor, the load cylinder, the pre-friction cylinder and the blower, and is used for controlling the start and stop of the servo motor, the extension and retraction of the load cylinder, the extension and retraction of the pre-friction cylinder, the start and stop of the blower and the rotating speed.

[0019] In another aspect, the utility model provides a kind of brake friction plate friction performance detection system, including the brake friction plate friction performance detection device.

[0020] Compared with prior art, the utility model achieves the beneficial effects:

[0021] The brake friction plate friction performance detection device and system provided by the utility model include: rotary friction mechanism, load mechanism, heating mechanism, air cooling mechanism and detection mechanism, the vertical mechanism composed of friction plate fixing seat, supporting device and load cylinder can be laterally offset along with the force of friction plate, so that the mechanical sensor can more accurately measure the friction force of the measured friction plate, so that the detection result is more accurate;

[0022] The brake friction plate friction performance detection device and system provided by the utility model can make the detection result more accurate by setting pre-friction cylinder and pre-friction before test, so that sample surface is attached to rotary drum;

[0023] The brake friction plate friction performance detection device and system provided by the utility model can comprehensively detect friction plate under different temperatures by setting heating mechanism and air cooling mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic view of brake friction plate friction performance detection device provided by the utility model;

[0025] Figure 2 It is the structure schematic view of rotary friction mechanism of brake friction plate friction performance detection device provided by the utility model;

[0026] Figure 3 It is the structure schematic view of load mechanism of brake friction plate friction performance detection device provided by the utility model;

[0027] Figure 4It is the structure schematic view of the rotating friction mechanism and the load mechanism of the brake friction plate friction performance detection device provided by the utility model.

[0028] Figure 5 It is the structure schematic view of the brake friction plate friction performance detection system provided by the utility model.

[0029] Figure 6 It is the partial structure schematic view of the brake friction plate friction performance detection device provided by the utility model.

[0030] In the figure: 1, servo motor; 2, shaft coupling; 3, rotating drum; 4, support bearing; 5, load cylinder; 6, pre-friction cylinder; 7, lever support; 8, lever piece; 9, support device; 10, friction plate fixed seat; 11, first force sensor; 12, second force sensor; 13, positioning bearing; 14, air pipe; 15, air port adjusting plate; 16, cylinder mounting seat; 17, height adjusting rod; 18, floating rod. DETAILED DESCRIPTION

[0031] The utility model will be further described below in combination with the drawings. The following examples are only used for more clearly explaining the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0032] The test principle of the brake friction plate friction performance detection device provided by the utility model for carrying out friction performance detection is as follows: the rotating drum is rotated under the driving of the motor, the load cylinder is retracted, the tested friction plate is pressed down to the inner wall of the rotating drum, the first force sensor records the pressure load F n Size, the second force sensor records the friction force F μ Size between the friction plate and the rotating drum, according to the formula μ=F μ / F n The friction coefficient μ of the tested friction plate can be calculated.

[0033] Example 1

[0034] The embodiment provides a brake friction plate friction performance detection device, as shown in the figure, which comprises a rotating friction mechanism, a load mechanism, a heating mechanism, an air cooling mechanism and a detection mechanism. Figure 1 As shown in the figure, the rotating friction mechanism comprises a servo motor 1, a shaft coupling 2, a rotating drum 3 and a support bearing.

[0035] Figure 2

[0036] ​​The rotating drum 3 comprises a rotating drum body and a rotating drum shaft, wherein the rotating drum shaft is coaxial with the rotating drum body and is installed on the non-working side of the rotating drum body; the rotating drum shaft passes through the support bearing 4 which is supported on the test bench; the rotating drum 3 is connected with the servo motor 1 through the coupling 2, and the rotating drum 3, the coupling 2 and the servo motor 1 are coaxial, and the servo motor 1 is used to drive the coupling 2 to rotate, thereby driving the rotating drum 3 to rotate.

[0037] The heating mechanism and the air cooling mechanism are both installed on the outer curved surface of the rotating drum 3, and are used to heat or cool the rotating drum 3.

[0038] As shown in Figure 3 , Figure 4 The load mechanism comprises a base, a load cylinder 5, a pre-friction cylinder 6, a lever support 7, a lever piece 8, an adjustable height supporting device 9, a friction piece fixing seat 10, a height adjusting rod 17 and a cylinder mounting seat 16, the cylinder mounting seat 16 is installed on the base, the load cylinder 5 is installed on the cylinder mounting seat 16, the load cylinder 5 can move transversely relative to the cylinder mounting seat 16, the supporting device 9 is connected to the working end of the load cylinder 5 in a vertical manner, and the load cylinder 5 and the supporting device 9 are coaxial, and the friction piece fixing seat 10 is installed on the top end of the supporting device 9.

[0039] The lever support 7 and the pre-friction cylinder 6 are both installed on the base, and the lever support 7, the load cylinder 5 and the pre-friction cylinder 6 are collinear, the height adjusting rod 17 is connected to the working end of the pre-friction cylinder 6, and the pre-friction cylinder 6 is coaxial with the height adjusting rod 17, one end of the lever piece 8 is hinged to the upper end of the height adjusting rod 17, the other end is hinged to the lever support 7, and the middle part of the lever piece 8 in the horizontal direction is hinged to the supporting device 9, and the rotating shaft can move transversely, and the pre-friction cylinder 6 can transmit the pulling force to the friction piece fixing seat 10 through the lever.

[0040] The detection mechanism comprises a first force sensor 11, a second force sensor 12 and a thermocouple, wherein the first force sensor 11 is installed on the supporting device 9 and is used to measure the load applied to the friction piece, the second force sensor 12 is installed on the friction piece fixing seat 10 and is used to measure the friction force, and the thermocouple is installed on the outer curved surface of the rotating drum 3 and is used to measure the temperature.

[0041] In this embodiment, the material of the rotating drum is cast iron.

[0042] The rotating friction mechanism further comprises a positioning bearing 13, the rotating drum shaft passes through the positioning bearing 13, the positioning bearing 13 is supported on the test bench, and the positioning bearing 13 is located between the support bearing 4 and the rotating drum body in the transverse direction.

[0043] As shown in Figure 3 ,Figure 6 As shown, the load mechanism further comprises a floating rod 18 and a support plate, which is installed at both ends of the friction plate fixing seat 10, one end of the floating rod 18 is hinged on the workbench, and the other end is hinged on the support plate.

[0044] In the embodiment, the heating mechanism adopts an electric heating pipe.

[0045] The air cooling mechanism comprises an air pipe 14, a blower and an air outlet adjusting plate 15, and the rotating friction mechanism further comprises an outer cover, which is sleeved on the outer side of the rotating drum 3, the outlet of the air pipe 14 is connected to the air inlet of the blower, the inlet is installed on the outer cover, and the inlet faces the outer curved surface of the rotating drum body, and the air outlet adjusting plate 15 is installed outside the inlet of the air pipe 14 and is used for adjusting the size of the air volume. When the air cooling mechanism works, the hot air near the rotating drum 3 is drawn away by the blower, so that the air flow is formed, and the cooling is realized.

[0046] The brake friction plate friction performance detection device provided by the embodiment further comprises a controller, which is in communication connection with the servo motor 1, the load cylinder 5, the pre-friction cylinder 6 and the blower, and is used for controlling the start and stop of the servo motor 1, the extension and contraction of the load cylinder 5, the extension and contraction of the pre-friction cylinder 6, and the start and stop and the rotating speed of the blower.

[0047] Before the brake friction plate is detected by using the brake friction plate friction performance detection device provided by the utility model, first, the detection mechanism is installed, the height of the supporting device 9 is adjusted, and the friction plate fixing seat 10 is basically located in the lower half side of the rotating drum 3.

[0048] The method for detecting the brake friction plate by using the brake friction plate friction performance detection device provided by the utility model comprises the following steps:

[0049] (1) Pre-wear test: start the servo motor, drive the rotating drum to rotate, and make the pre-friction cylinder contract and press down the tested friction plate, so that the tested friction plate and the rotating drum are lightly contacted and worn, until the tested surface of the tested friction plate forms a circular surface and completely coincides with the inner surface of the rotating drum, and then the weight and thickness of the tested piece are recorded; this step is used for improving the accuracy of the experimental results;

[0050] (2) Baseline test: under the preset temperature condition and the preset rotating drum rotating speed, the tested friction plate is repeatedly loaded and unloaded until the preset number of rounds is completed, and the friction force between the tested friction plate and the rotating drum at the end of each loading is recorded;

[0051] (3) Fading experiment: under the preset rotation speed of the drum, the tested friction plate is loaded with a preset load from the first preset temperature of the drum temperature, the drum is gradually heated in the process of continuous dragging, until the drum temperature reaches the second preset temperature or the dragging time reaches 10 minutes, the experiment is ended, and the friction force between the tested friction plate and the drum is recorded every other preset time;

[0052] (4) Recovery experiment: under the preset rotation speed of the drum, the drum is gradually cooled, when the drum temperature drops to the third preset temperature, the fourth preset temperature and the fifth preset temperature, the tested friction plate is loaded with a preset load, and the tested friction plate is dragged for 10s, and the friction force of each time is recorded.

[0053] Finally, the friction performance of the tested piece is evaluated through the recorded friction force, the thickness and the weight of the tested piece in the experiment.

[0054] Example 2

[0055] The embodiment provides a brake friction plate friction performance detection system, which comprises the brake friction plate friction performance detection device as described in the embodiment 1, and the system is as shown in the Figure 5 .

[0056] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown in the drawings, and is only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, if the certain posture changes, the directional indication also changes accordingly. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0057] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "mounts", "is linked", "connects" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connects;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can indirectly connect through intermediate medium, can be two elements inside the intercommunication.For ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0058] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the above specific implementation, the above specific implementation is only illustrative, but is not restrictive, and the ordinary skilled person in the art can make a lot of forms under the inspiration of the utility model without departing from the scope of the utility model and the protection scope of the claims, and these all belong to the protection of the utility model.

Claims

1. A device for detecting the frictional performance of a brake pad, characterized by, The device comprises a rotating friction mechanism, a load mechanism, a heating mechanism, an air cooling mechanism and a detection mechanism. The heating mechanism and the air cooling mechanism are both installed on the rotating friction mechanism, and are used for heating or cooling the rotating friction mechanism. The load mechanism comprises a base, a load cylinder (5), a pre-friction cylinder (6), a lever support (7), a lever piece (8), an adjustable height supporting device (9), a friction piece fixing seat (10), an adjustable height height adjusting rod (17) and a cylinder mounting seat (16), the cylinder mounting seat (16) is installed on the base, the load cylinder (5) is installed on the cylinder mounting seat (16), the load cylinder (5) can move transversely relative to the cylinder mounting seat (16), the supporting device (9) is vertically connected to the working end of the load cylinder (5), and the load cylinder (5) and the supporting device (9) are coaxial, and the friction piece fixing seat (10) is installed at the top end of the supporting device (9). The lever support (7) and the pre-friction cylinder (6) are both installed on the base, and the lever support (7), the load cylinder (5) and the pre-friction cylinder (6) are collinear, the height adjusting rod (17) is connected to the working end of the pre-friction cylinder (6), and the pre-friction cylinder (6) is coaxial with the height adjusting rod (17), one end of the lever piece (8) is hingedly connected to the upper end of the height adjusting rod (17), the other end is hingedly connected to the lever support (7), and the middle part of the lever piece (8) in the horizontal direction is hingedly connected to the supporting device (9), and the rotating shaft can move transversely, and the pre-friction cylinder (6) can transmit the pulling force to the friction piece fixing seat (10) through the lever. During the test, the upper surface of the friction piece is fixed at the bottom of the friction piece fixing seat (10), and the lower surface is in contact with the rotating friction mechanism, when the friction piece is rubbed, the mechanism composed of the friction piece fixing seat (10), the supporting device (9) and the load cylinder (5) can move transversely under the action of the friction force of the friction piece. The detection mechanism is installed on the load mechanism and the rotating friction mechanism, and is used for detecting the pressure applied to the friction piece, the friction force between the friction piece and the rotating friction mechanism and the temperature of the rotating friction mechanism.

2. The brake friction piece friction performance detection device according to claim 1, wherein the rotating friction mechanism comprises a servo motor (1), a shaft coupling (2), a rotating drum (3) and a supporting bearing. The rotating drum (3) comprises a rotating drum body and a rotating drum shaft, wherein the rotating drum shaft is installed on the non-working side of the rotating drum body and is coaxial with the rotating drum body; the rotating drum shaft passes through the supporting bearing (4), and the supporting bearing (4) is supported on the test bench; the rotating drum (3) is connected with the servo motor (1) through the shaft coupling (2), and the rotating drum (3), the shaft coupling (2) and the servo motor (1) are coaxial, and the servo motor (1) is used for driving the shaft coupling (2) to rotate, so as to drive the rotating drum (3) to rotate. ​ ​ 3. The apparatus of claim 2 wherein: The detection mechanism comprises a first force sensor (11), a second force sensor (12) and a thermocouple, wherein the first force sensor (11) is installed on the support device (9) for measuring the load applied on the friction plate, the second force sensor (12) is installed on one side of the friction plate fixing seat (10) for measuring the friction force, and moves away from the second force sensor (12) when the friction plate fixing seat (10) is forced to displace, and the thermocouple is installed on the outer curved surface of the rotating drum (3) for measuring the temperature.

4. The apparatus for detecting the friction performance of brake linings according to claim 2, characterized in that: The rotating friction mechanism further comprises a positioning bearing (13), the rotating drum shaft passes through the positioning bearing (13), the positioning bearing (13) is supported on the experiment table, and the positioning bearing (13) is located between the support bearing (4) and the rotating drum body in the transverse direction.

5. The apparatus of claim 3 wherein: The load mechanism further comprises a floating rod (18) and a support plate, the support plate is installed on both ends of the friction plate fixing seat (10), one end of the floating rod (18) is hinged to the workbench, the other end is hinged to the support plate, and the second force sensor (12) is installed on the outer side of the support plate.

6. The apparatus of claim 1 wherein: The heating mechanism comprises an electric heating pipe.

7. The apparatus of claim 2 wherein: The air cooling mechanism comprises an air pipe (14), a blower and an air outlet adjusting plate (15), the rotating friction mechanism further comprises an outer cover, the outer cover is sleeved on the outer side of the rotating drum (3), the outlet of the air pipe (14) is connected to the air inlet of the blower, the inlet is installed on the outer cover, and the inlet faces the outer curved surface of the rotating drum body, and the air outlet adjusting plate (15) is installed outside the inlet of the air pipe (14) for adjusting the size of the air volume.

8. The apparatus of claim 7 wherein: A controller is further included, which is in communication connection with the servo motor (1), the load cylinder (5), the pre-friction cylinder (6) and the blower, for controlling the start and stop of the servo motor (1), the extension and retraction of the load cylinder (5), the extension and retraction of the pre-friction cylinder (6), the start and stop of the blower and the rotating speed.

9. A brake pad friction performance detection system, characterized by: The brake friction plate friction performance detection device comprises the brake friction plate friction performance detection device according to any one of claims 1-8. The brake friction plate friction performance detection device comprises the brake friction plate friction performance detection device according to any one of claims 1-8.

Images