CN209762076U - device for automatically detecting thickness of brake pad of semi-mounted shaft - Google Patents
device for automatically detecting thickness of brake pad of semi-mounted shaft Download PDFInfo
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- CN209762076U CN209762076U CN201920258255.6U CN201920258255U CN209762076U CN 209762076 U CN209762076 U CN 209762076U CN 201920258255 U CN201920258255 U CN 201920258255U CN 209762076 U CN209762076 U CN 209762076U
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Abstract
The utility model discloses an automatic detect semi-mounted shaft brake block thickness device belongs to the technical field that trailer brake block thickness detected. The utility model discloses a be equipped with the control unit, detection device, fix angle sensor and the alarm display unit that is equipped with on the linking arm on the camshaft and the linking arm, through the distance between angle sensor control setpoint and the brake drum inner wall, judge whether to be the maximum distance of the roll face of setpoint distance gyro wheel, and then the control unit control alarm display unit sends and marks the suggestion, changes its brake block. When the stress sensor arranged in the detection device measures data, the deformation quantity of the compression spring is calculated, the abrasion thickness of the brake pad is accurately obtained, and the control unit controls the alarm display unit to give an alarm prompt through the data obtained by the angle sensor and the stress sensor. The utility model discloses simple structure, high accuracy can effectively guarantee its driving safety nature, can utilize the brake block maximum simultaneously.
Description
Technical Field
The utility model relates to a technical field that trailer brake block thickness detected especially relates to an automatic detect semi-mounted axle brake block thickness device.
background
The motion of brake block is realized by the rotation of camshaft, and some semitrailer axles install a calibrated scale at the end of camshaft, reflect the condition of friction disc wearing and tearing according to the angle of rotation of camshaft, but judge through the instruction of calibrated scale and have very big error, the condition of friction disc wearing and tearing can not accurate detection.
The problem of need change the brake block now and lean on experience value and creep into the vehicle bottom and observe the wearing and tearing condition of friction disc through the observation hole of dust cover, the wearing and tearing situation of judgement friction disc that the naked eye observation can not be accurate is solved, and the dust cover is inboard at the vehicle bottom in addition, should not observe, has certain potential safety hazard in addition.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the prior art in not enough, so provide an automated inspection semitrailer axle brake block thickness device, realize the maximize with the brake block rate of use, save it and use the change expense, guarantee its driving safety nature, make things convenient for its installation and change.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A semi-trailer axle comprises an axle tube with a brake bottom plate, a brake drum, a dust cover and a friction assembly with a cam shaft, wherein the device for automatically detecting the thickness of the semi-trailer axle brake pad comprises a detection unit, a control unit and an alarm display unit; the detection unit is arranged on one side wall of the friction assembly, which is opposite to the brake drum, of the cam shaft; the detection unit comprises a connecting arm and a detection device; one end of the connecting arm is fixedly connected with a cam shaft of the friction assembly; the other end of the connecting arm is fixedly connected with a detection device; an angle sensor is arranged on the side wall of the connecting arm; the control unit is arranged on the outer wall of the dust cover; the output ends of the angle sensor and the detection device are electrically connected with the input end of the control unit; the alarm display unit is disposed in the cab.
Further, the connecting arm comprises a horizontal section and a vertical section; one end of the horizontal section is provided with threads, and the end of the horizontal section provided with the threads is connected with a cam shaft of the friction assembly; the vertical section is located outside of the friction pack.
Further, the length of the vertical section is equal to the difference between the length of the cam shaft on the friction assembly from the inner wall of the brake drum and the length of the detection device.
Further, the detection device comprises a bracket, a roller with a rotating shaft and a compression spring; the bracket is of a U-shaped structure, and rectangular holes are formed in two side walls of the bracket; the rectangular hole is arranged in parallel with the connecting arm; one end of the rectangular hole, which is close to the connecting arm, is provided with a stress sensor; the rotating shaft of the roller is connected in the rectangular hole; one end of the compression spring is attached to the stress sensor; the other end of the compression spring is attached to the rotating shaft of the roller.
Furthermore, the outer walls of the support and the roller are provided with heat insulation layers.
Further, the output end of the stress sensor is electrically connected with the input end of the control unit.
Further, the angle sensor detects a distance between the roller and an inner wall of the brake drum.
Compared with the prior art, the utility model discloses possess following beneficial effect:
(1) One end of the connecting arm is fixedly connected with a cam shaft of the friction assembly; one side fixedly connected with angle sensor of linking arm drives the linking arm through the rotation of camshaft and rotates, and angle sensor carries out the monitoring of angle to the linking arm, and when detection device and brake drum inner wall contact, the control unit control alarm display unit sends in the driver's cabin and marks the suggestion and remind the driver need change the brake block, and then guarantees the utilization ratio and the driving safety nature of its brake block.
(2) The detection device comprises a bracket, a roller with a rotating shaft and a compression spring; the bracket is of a U-shaped structure, and rectangular holes are formed in two side walls of the bracket; the rectangular hole is arranged in parallel with the connecting arm; one end of the rectangular hole, which is close to the connecting arm, is provided with a stress sensor; the rotating shaft of the roller is connected in the rectangular hole; one end of the compression spring is attached to the stress sensor; the other end of the compression spring is attached to the rotating shaft of the roller. After the inner wall laminating through gyro wheel and brake drum, the deformation volume of compression spring is judged through the value that compression spring and stress sensor set for, stress sensor and angle sensor combined action, the control unit will control alarm display unit and send out the police dispatch newspaper and remind, and then can be to the vehicle in going, the brake block through this deformation volume thickness carries out the effect that prevents the brake block and become invalid suddenly, can obtain the rate of utilization of brake block and guarantee, and then reduce car owner's change expense, the situation that eliminates the brake block and become invalid suddenly simultaneously takes place, the steam generator is simple in structure, and convenient for installation.
(3) The length of vertical section equals the difference between the length of the inner wall of the brake drum and the length of the detection device from the camshaft on the friction assembly, and when the detection device is in contact with the inner wall of the brake drum, the connecting arm and the inner wall of the brake drum are in a vertical state, so that a measurement reference point is provided for the angle sensor, the control unit can conveniently detect the angle change of the connecting arm through the angle sensor, and the measurement accuracy is improved.
(4) The outer walls of the support and the roller are provided with heat insulation layers, so that the high temperature generated when the brake drum and the friction assembly brake is prevented from influencing the shapes of the roller and the surface of the support, the measurement accuracy is guaranteed, and the service life of the detection device is effectively guaranteed.
Drawings
FIG. 1 is a partial sectional view of the working condition of the present invention;
FIG. 2 is a side view of the partial section of the working device of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
Fig. 5 is a control schematic diagram of the present invention.
In the figure: 1. bridge pipe, 2, brake drum, 3, friction assembly, 4, dust cover, 5, connecting arm, 51, angle sensor, 6, control unit, 7, detection device, 71, bracket, 72, roller, 73, compression spring, 74, stress sensor, 8 and alarm display unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
in the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example 1:
As shown in fig. 1 to 2, an apparatus for automatically detecting the thickness of a brake pad for a semitrailer shaft, which comprises a bridge pipe 1 having a brake spider, a brake drum 2, a dust cover 4, and a friction assembly 3 having a camshaft, includes a detection unit, a control unit 6, and an alarm display unit 8. The detecting element sets up on the camshaft on friction unit 3 just to the lateral wall of brake drum 2, the detecting element includes that length is L's linking arm 5 and detection device 7, the one end of linking arm 5 is fixed with friction unit 3's camshaft, the other end and the detection device 7 of linking arm 5 are fixed, make its linking arm 5 rotatory to the maximum angle through the rotation of camshaft, friction unit 3 brakes through violent friction with brake drum 2, when detection device 7 and the 2 inner wall contacts of brake drum, include that two kinds of states are brake block failure mode and brake block failure mode in advance respectively. An angle sensor 51 for measurement is installed on one side wall of the connecting arm 5, the angle sensor 51 measures the included angle between the connecting arm 5 and the diameter of the brake drum 2 where the camshaft is located, and the angle value when the detection device 7 just contacts the brake drum 2 is the brake pad pre-failure state. The control unit 6 is arranged on the outer wall of the dust cover 4, the output ends of the angle sensor 51 and the detection device 7 are electrically connected with the input end of the control unit 6, and when the angle value measured by the angle sensor 51 is zero (when the detection device 7 contacts the inner wall of the brake drum 2), the control unit 8 works to output signals. Alarm display element 8 sets up in the driver's cabin, and alarm display element 8's input is connected with the output electricity of control unit 6, and when detection device 7 contacted the inner wall of brake drum 2, alarm display element 8 was in operating condition, and the suggestion is marked in the demonstration, and the suggestion driver need change the brake block, and then guarantees its driving safety nature.
example 2:
As shown in fig. 1 to 2, an apparatus for automatically detecting the thickness of a brake pad for a semitrailer shaft, which comprises a bridge pipe 1 having a brake spider, a brake drum 2, a dust cover 4, and a friction assembly 3 having a camshaft, includes a detection unit, a control unit 6, and an alarm display unit 8. The detecting element sets up on the camshaft on friction unit 3 just to the lateral wall of brake drum 2, the detecting element includes that length is L's linking arm 5 and detection device 7, the one end of linking arm 5 is fixed with friction unit 3's camshaft, the other end and the detection device 7 of linking arm 5 are fixed, make its linking arm 5 rotatory to the maximum angle through the rotation of camshaft, friction unit 3 brakes through violent friction with brake drum 2, when detection device 7 and the 2 inner wall contacts of brake drum, include that two kinds of states are brake block failure mode and brake block failure mode in advance respectively. An angle sensor 51 for measurement is installed on one side wall of the connecting arm 5, the angle sensor 51 measures the included angle between the connecting arm 5 and the diameter of the brake drum 2 where the camshaft is located, and the angle value when the detection device 7 just contacts the brake drum 2 is the brake pad pre-failure state. The control unit 6 is arranged on the outer wall of the dust cover 4, the output ends of the angle sensor 51 and the detection device 7 are electrically connected with the input end of the control unit 6, and when the angle value measured by the angle sensor 51 is zero (when the detection device 7 contacts the inner wall of the brake drum 2), the control unit 8 works to output signals. Alarm display element 8 sets up in the driver's cabin, and alarm display element 8's input is connected with the output electricity of control unit 6, and when detection device 7 contacted the inner wall of brake drum 2, alarm display element 8 was in operating condition, shows to mark, and the suggestion driver need change the brake block, and then guarantees its driving safety nature.
In the present embodiment, as shown in fig. 3, it is preferable that the connecting arm 5 includes a horizontal section and a vertical section; the one end that the vertical section was kept away from to the horizontal segment is connected with friction subassembly 3's camshaft with the screw thread mode, and the vertical section is located friction subassembly 3's outside, guarantees detection device 7's normal detection function, prevents to appear rubbing between the two, influences the testing result, guarantees its measurement accuracy.
in this embodiment, preferably, the length of the vertical section is equal to the difference between the length of the camshaft on the friction assembly 3 from the inner wall of the brake drum 2 and the length of the detection device 7, and when the detection device 7 contacts the inner wall of the brake drum 2 (the angle value measured by the angle sensor 51 is zero), the connecting arm 5 coincides with the diameter direction of the brake drum 2 where the camshaft is located, so that the control unit 6 can conveniently work.
As shown in fig. 3 and 4, in this embodiment, preferably, the detecting device 7 includes a bracket 71, a roller 72 with a rotating shaft, and a compression spring 73, where the bracket 71 is a U-shaped structure, two side walls of the bracket 71 are both provided with rectangular holes, the rectangular holes are parallel to the connecting arm 5, one end of the rectangular hole close to the connecting arm 5 is provided with a stress sensor 74, the rotating shaft of the roller 72 is connected in the rectangular hole, one end of the compression spring 73 is attached to the stress sensor 74 with a critical stress value B inside, a deformation amount of the compression spring 73 corresponding to the stress value B is equal to a difference between a thickness value of the brake pad in the pre-failure state and a thickness value of the brake pad in the brake failure state, and an output end of the stress sensor 74 is electrically connected. The other end of the compression spring 73 is attached to the rotating shaft of the roller 72, when the roller 72 contacts the inner wall of the brake drum 2, when the connecting arm 5 rotates to the diameter of the brake drum 2 where the cam shaft is located, the stress sensor 74 is in a non-working state, when the connecting arm 5 rotates to the outer side of the diameter direction of the brake drum 2 where the cam shaft is located, the roller 72 still contacts the inner wall of the brake drum 2 at the moment, when the stress value measured by the stress sensor 74 is smaller than the stress value B, the control unit 8 is still in a working state, but a signal output by the control unit 6 controls the alarm display unit 8 to give an alarm prompt, and a driver is indicated to replace the brake pad as soon as possible. The brake block can be detected in real time, the driving safety is effectively guaranteed, and meanwhile, the device is simple in structure and convenient to install.
In this embodiment, preferably, in the braking process, the outer walls of the bracket 71 and the roller 72 are both provided with heat insulation layers due to the high temperature influence generated by friction between the brake drum 2 and the friction component 3, so that the deformation of the detection device 7 due to the high temperature influence is avoided, and the detection accuracy is ensured.
the utility model discloses a theory of operation: after the parts of the device for automatically detecting the thickness of the brake pad of the semitrailer shaft are installed in place, the angle between the connecting arm 5 of the device and the diameter of the brake drum 2 where the camshaft is located is adjusted by adjusting the camshaft on the friction component 3 of the device, or the angle between the connecting arm 5 of the device and the diameter of the brake drum 2 where the camshaft is located is directly adjusted, the thickness of the brake pad corresponding to the angle is slightly smaller than the effective thickness of the brake pad, and the normal work of the stress sensor 74 of the brake pad is ensured. The detection of the change in angle between the connecting arm 51 and the diameter of the brake drum 2 on which the camshaft is located is performed by the angle sensor 51, when the roller 72 arranged on the detection device 7 is just attached to the inner wall of the brake drum 2 (the angle value measured by the angle sensor 51 is zero), the angle sensor 51 outputs a signal, the control unit 6 controls the alarm display unit 8 to send a mark prompt after receiving the signal, so as to remind a driver to replace a brake pad of the driver, when the roller 72 is attached to the brake drum 2, meanwhile, when the angle measured by the angle sensor 51 is a negative value and the deformation amount of the compression spring 93 corresponding to the stress value measured by the stress sensor 74 is smaller than the stress to B, the control unit 6 controls the alarm display unit 8 to give an alarm to remind a driver, and the driver needs to replace the brake pad as soon as possible to ensure the driving safety, the structure is simple, and the maximum utilization rate of the brake pad is accurately ensured.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitution may be of partial structures, devices, method steps, or may be a complete solution. According to the technical scheme of the utility model and utility model thereof think of and equal replacement or change, all should cover within the scope of protection of the utility model.
Claims (6)
1. A semi-trailer axle comprises an axle tube (1) with a brake bottom plate, a brake drum (2), a dust cover (4) and a friction component (3) with a cam shaft, and is characterized in that the device for automatically detecting the thickness of the brake sheet of the semi-trailer axle comprises a detection unit, a control unit (6) and an alarm display unit (8); the detection unit is arranged on one side wall of the friction assembly (3) with the camshaft facing the brake drum (2); the detection unit comprises a connecting arm (5) and a detection device (7); one end of the connecting arm (5) is fixedly connected with a cam shaft of the friction assembly (3); the other end of the connecting arm (5) is fixedly connected with a detection device (7); an angle sensor (51) is arranged on the side wall of the connecting arm (5); the control unit (6) is arranged on the outer wall of the dust cover (4); the output ends of the angle sensor (51) and the detection device (7) are electrically connected with the input end of the control unit (6); the alarm display unit (8) is disposed in the cab.
2. The device for automatically detecting the thickness of the brake pad of the semitrailer according to claim 1, characterized in that the connecting arm (5) comprises a horizontal segment and a vertical segment; one end of the horizontal section is provided with threads, and the end of the horizontal section provided with the threads is connected with a cam shaft of the friction assembly (3); the vertical section is located outside the friction assembly (3).
3. Device for automatic detection of the thickness of brake semi-trailer according to claim 2, characterized in that the length of said vertical section is equal to the difference between the length of the camshaft on the friction assembly (3) from the inner wall of the brake drum (2) and the length of the detection device (7).
4. Device for automatically detecting the thickness of brake pads of semitrailers according to claim 1, characterized in that said detection device (7) comprises a bracket (71), a roller (72) with a rotation axis and a compression spring (73); the support (71) is of a U-shaped structure, and rectangular holes are formed in two side walls of the support (71); the rectangular hole is arranged in parallel with the connecting arm (5); one end of the rectangular hole, which is close to the connecting arm (5), is provided with a stress sensor (74); the rotating shaft of the roller (72) is connected in the rectangular hole; one end of the compression spring (73) is attached to the stress sensor (74); the other end of the compression spring (73) is attached to the rotating shaft of the roller (72).
5. The device for automatically detecting the thickness of the brake pad of the semitrailer according to claim 4, characterized in that the outer walls of the bracket (71) and the roller (72) are provided with heat insulation layers.
6. Device for automatically detecting the thickness of brake semi-trailer according to claim 4, characterized in that the output of said stress sensor (74) is electrically connected to the input of the control unit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920258255.6U CN209762076U (en) | 2019-02-28 | 2019-02-28 | device for automatically detecting thickness of brake pad of semi-mounted shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920258255.6U CN209762076U (en) | 2019-02-28 | 2019-02-28 | device for automatically detecting thickness of brake pad of semi-mounted shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209762076U true CN209762076U (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920258255.6U Active CN209762076U (en) | 2019-02-28 | 2019-02-28 | device for automatically detecting thickness of brake pad of semi-mounted shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209762076U (en) |
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2019
- 2019-02-28 CN CN201920258255.6U patent/CN209762076U/en active Active
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