CN203422187U - Detection device of drum-type brake - Google Patents
Detection device of drum-type brake Download PDFInfo
- Publication number
- CN203422187U CN203422187U CN201320503109.8U CN201320503109U CN203422187U CN 203422187 U CN203422187 U CN 203422187U CN 201320503109 U CN201320503109 U CN 201320503109U CN 203422187 U CN203422187 U CN 203422187U
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- CN
- China
- Prior art keywords
- drum brake
- pulling force
- bracing wire
- control system
- electric cylinder
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- Expired - Lifetime
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Abstract
The utility model discloses a detection device of a drum-type brake and relates to the test device field. The objective of the utility model is to solve the technical problem of structural and operational complexity of a drum-type brake detection device in the prior art. The detection device of the utility model comprises a detection stage and a control system; the detection stage is provided with a driver, a detection member and a position seat used for placing the drum-type brake; the detection member includes a tension sensor and a displacement sensor; the tension sensor is connected with the drum-type brake in the positioning seat through a pull wire; the driver drives the pull wire to pull the drum-type brake to realize parking braking and to releases the pull wire to make the drum-type brake recover an initial state; the tension sensor and the displacement sensor respectively detect the pulling force and stroke of the pull wire in the driving process of the driver; the tension sensor and the displacement sensor are electrically connected with the control system; and the control system can calculate the working initial force and engineering displacement of the brake.
Description
[technical field]
The utility model relates to a kind of pick-up unit, especially a kind of pick-up unit of drum brake.
[background technology]
While adopting drum brake with the automobile of EPB electronic parking system, start electronic parking, when drum brake is applied to certain pulling force, the technical parameters such as the initial tensile force of startup drum brake, bracing wire stroke are all had to technical requirement, thereby guarantee the braking effect of drum brake.The at present detection of drum brake is mainly inspected by random samples by the dedicated experiments equipment of inspection center, and handles complexity and need professional and technical personnel to detect, and cannot meet the requirement of mass detection on production line.
[summary of the invention]
The technical matters that the utility model solves is to provide a kind of pick-up unit of drum brake, can detect the braking effect of drum brake, and apparatus structure is simple, robotization is high, manipulation is simple.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of pick-up unit of drum brake, comprise monitor station and control system, described monitor station is provided with electric cylinder, detection piece and the positioning seat of placing drum brake, described detection piece comprises pulling force sensor and displacement transducer, described pulling force sensor connects the drum brake in positioning seat by bracing wire, described electric cylinder drives bracing wire to pull drum brake to reach parking braking state and discharges bracing wire and makes drum brake reply original state, described pulling force sensor and displacement transducer detect respectively pulling force and the stroke of bracing wire in electric cylinder driving process, described pulling force sensor and displacement transducer are electrically connected to described control system.
Further, described positioning seat is provided with the pneumatic displacement transducer corresponding with drum brake both sides friction disc, and described pneumatic displacement transducer is electrically connected to control system.
Further, described monitor station is provided with electric cylinder fixed mount and guy wire support, and described electric cylinder is arranged on described electric cylinder fixed mount, and described bracing wire is arranged on guy wire support, and described pulling force sensor is set between electric cylinder and bracing wire.
Further, described displacement transducer connects described electric cylinder, pulling force sensor or bracing wire by connecting link.
Further, between described pulling force sensor and bracing wire, be provided with bracing wire adjustment block.
Further, described monitor station is provided with control box, described control system is set in described control box, and control system is provided with display screen.
Further, described pick-up unit also comprises pilot lamp, and described pilot lamp is electrically connected to described control system.
Further, described electric cylinder is servo electric jar.
The beneficial effects of the utility model:
In pick-up unit of the present utility model, pulling force sensor connects the drum brake in positioning seat by bracing wire, electric cylinder can drive bracing wire to pull drum brake action, in drawing process, pulling force sensor detects the size of bracing wire upper pulling force, displacement transducer detects the stroke of bracing wire, and by data feedback to control system, control system calculates job initiation power and the engineering displacement of surveyed drum brake, detect numerical value and standard value and compare, judge whether institute's survey drum brake meets standard.This device simple in structure, easy for installation, and operating process do not have specific (special) requirements to reviewer, robotization is high, handle simple, can be by shop floor worker fast operating.
These features of the present utility model and advantage will be below embodiment, accompanying drawing in detailed exposure.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is concrete scheme of installation of the present utility model;
Fig. 3 is the La Li – stroke curve partial view that control system records;
Fig. 4 is the La Li – stroke curve full view that control system records.
[embodiment]
The utility model provides a kind of pick-up unit of drum brake, comprise monitor station and control system, monitor station is provided with electric cylinder, detection piece and the positioning seat of placing drum brake, detection piece comprises pulling force sensor and displacement transducer, pulling force sensor connects the drum brake in positioning seat by bracing wire, electric cylinder drives bracing wire to pull drum brake to reach parking braking state and discharges bracing wire and makes drum brake reply original state, pulling force sensor and displacement transducer detect respectively pulling force and the stroke of bracing wire in electric cylinder driving process, pulling force sensor and displacement transducer are electrically connected to control system.Pulling force sensor and displacement transducer drum brake is reached to parking braking state and reply the pulling force surveyed in original state process and travel feedback to control system, control system is according to the variation relation of stroke and pulling force, can calculate detent job initiation power and engineering displacement, measured result can provide reference for the design of drum brake, or as the whether qualified reference of check institute's survey drum brake.
Accompanying drawing below in conjunction with the utility model embodiment is explained and illustrated the technical scheme of the utility model embodiment, but following embodiment is only preferred embodiment of the present utility model, not all.Embodiment based in embodiment, those skilled in the art are other embodiment that obtains under the prerequisite of not making creative work, all belongs to protection domain of the present utility model.
With reference to figure 1 and Fig. 2, the pick-up unit of shown drum brake, comprise monitor station 1 and control system, the positioning seat 12 that monitor station 1 is provided with electric cylinder 6, detection piece and places drum brake 7, detection piece comprises pulling force sensor 4 and displacement transducer 5, the drum brake 7 that pulling force sensor 4 connects in positioning seat 12 by bracing wire 2, electric cylinder 6 connects pulling force sensor 4 and drives bracing wire 2 actions.When in reality is used, drum brake is in original state, without External Force Acting, when drum brake arrives parking braking state, brake-shoe compresses brake drum.In test process, electric cylinder 6 drives bracing wire 2 to pull drum brake to reach parking braking state and discharge bracing wire from original state and makes drum brake reply original state.Pulling force sensor 4 detect bracing wires by electric cylinder 6, pulled with dispose procedure in pulling force in bracing wire, displacement transducer 5 detects the stroke of bracing wire in these processes, pulling force sensor 4 and displacement transducer 5 are electrically connected to control system, preferred control system is PLC system.Control system is calculated detent job initiation power and the engineering displacement of institute's survey drum brake according to the measuring-signal of pulling force sensor and displacement transducer, and judges whether this drum brake meets the requirements.
Wherein, cavity 121 is set on positioning seat 12, in cavity 121, be placed with drum brake 7, the braking torque arm that bracing wire 2 connects in drum brake, by braking torque arm, drive brake-shoe to rotate, and in positioning seat 12, the inwall of cavity 121 is provided with two pneumatic displacement transducers 9,9 one-tenth 180 degree of pneumatic displacement transducer are symmetrical, be arranged in the outside of drum brake 7 two friction discs, pneumatic displacement transducer 9 is electrically connected to control system.In positioning seat, place after drum brake, start two pneumatic displacement transducers, whether control system can be measured friction disc external diameter according to the displacement of pneumatic displacement transducer, detect friction disc external diameter size and meet the requirements, to guarantee the parking effect of drum brake.
With reference to figure 2, monitor station 1 of the present utility model is provided with bracing frame 11, the base 111 of bracing frame 11 is provided with relative electric cylinder fixed mount 112 and guy wire support 113, the guy wire support 113 of close positioning seat 12 is provided with orienting sleeve 114, cross-under bracing wire 2 in orienting sleeve 114, on the electric cylinder fixed mount 112 of opposite side, electric cylinder 6 has been installed, pulling force sensor 4 one end connect electric cylinder 6, other end connecting stay wire 2, electric cylinder pulls in the process of bracing wire, pulling force sensor detects the variation of pulling force, and by data feedback to control system, in this structure, the two ends of pulling force sensor are supported, strengthen the accuracy of the value of thrust of surveying.
On the base 111 of above-mentioned bracing frame, displacement transducer 5 is set, the junction of electric cylinder 6 and pulling force sensor 4 is provided with connecting link 51, and the lower end of connecting link 51 is connected in displacement transducer 5.Connecting link 51 is with electric cylinder 6 actions, thus drive pulling force sensor 5, and the numerical value that pulling force sensor 5 records stroke feeds back to control system.Known according to test philosophy, guarantee that connecting link 51 one end connect pulling force sensor 5, and the other end is except being connected between electric cylinder 6 and pulling force sensor 4, can also be connected between pulling force sensor 4 and bracing wire 2, or be directly connected in bracing wire 2, all can measure the stroke of bracing wire.
Preferably, also between pulling force sensor 4 and bracing wire 2, be provided with bracing wire adjustment block 8.Rotate bracing wire adjustment block 8 and can, by bracing wire 2 tensions, guarantee that test starts front bracing wire in tensioning state, guarantees the braking procedure of the accurate corresponding drum brake of bracing wire stroke.
And, on monitor station 1, be also provided with control box 31, in control box 31, control system is set, and control system is provided with display screen 32, display screen 32 is arranged on the surface of control box 31, control system, according to the detection signal of displacement transducer and pulling force sensor, is drawn out La Li – stroke curve on display screen, the relation in display driver process between the variation of bracing wire stroke and tension variations.Can also the concrete concrete numerical value that shows friction disc external diameter.
In addition, pick-up unit also comprises pilot lamp 33, and pilot lamp 33 is electrically connected to control system.Control system is according to the detection signal computation and measurement value of displacement transducer, pulling force sensor and pneumatic displacement transducer, and measured value is compared with Comparison of standards value, judges whether each parameter meets standard.Surveyed drum brake detected when defective, control system generation signal, controls pilot lamp flicker, just can get rid of substandard product.Testing process does not need the numerical value on reading displayed screen just can get rid of substandard product, uses simply, and not needing just can complete independently operation through the technical staff of professional knowledge training.
The electric cylinder 6 adopting is servo electric jar.Servo electric jar is by the modular product of servomotor and leading screw integrated design, converts rotatablely moving of servomotor to rectilinear motion, and precise speed is controlled, Accurate Position Control, and accurately thrust is controlled; Thereby accurately control the variation of pulling force.
In the course of work:
First detected drum brake 7 is installed to bracing wire 2, put into positioning seat 12, rotate bracing wire adjustment block 8 by bracing wire 2 tensions.After starter gear, first two pneumatic displacement transducers 9 on positioning seat 12 move, and carry out the detection of friction disc external diameter; Completing friction disc external diameter detects after pneumatic displacement transducer reset, also improving gradually pulling force pulls bracing wire 2 in servo electric jar startup, the value of thrust that pulling force is promoted to setting reaches after parking braking state drum brake, and servo electric jar discharges pulling force to drum brake and replys original state; In this process, control system is according to the data-signal obtaining from displacement transducer 5 and pulling force sensor 4, on display screen 32, draw out La Li – stroke curve, and the engineering displacement while calculating friction disc external diameter, detent job initiation power and release direction predetermined pull value showing on display screen 32, control system contrasts calculated value and correlative value, calculated value is within correlative value scope time, 33 flickers of control system generation signal controlling pilot lamp.
The concrete Computing Principle of control system, the amount of movement of control system when the spacing of two pneumatic displacement transducers deducts two pneumatic displacement transducer contact friction sheets during according to initial position, calculates the size of friction disc external diameter.
The calculating of detent job initiation power, with reference to the pulling force-stroke curve partial view shown in figure 3, beats " X " and locates as flex point.Relatively before and after flex point: before flex point, after travel displacement 1mm, segment of curve is comparatively mild, and this section is detent hollow travel stage, and the pulling force increasing degree between the stroke of interval is little; After flex point, larger at interval of the pulling force increasing degree of stroke.According to servo electric jar, pull in bracing wire process, the curvilinear motion characteristic that control system is depicted, can determine flex point, and pulling force corresponding to flex point place is detent job initiation power.Control system is calculated flex point according to the tension variations degree under the stroke of interval, for example: the Rule of judgment of setting is that stroke is at interval of 1mm, tension variations is less than 10N, when occurring stroke interval 1mm, and pressure changes while surpassing 10N, judge that the point before and after changing is flex point, according to stroke value and the value of thrust of this point of the position enquiring of flex point, value of thrust is detent job initiation power.
The calculating of engineering displacement, with reference to figure 4, stroke value corresponding to curve inquiry predetermined pull value producing according to dispose procedure, the stroke value at the stroke value of gained and flex point place is subtracted each other the engineering displacement that obtains release direction predetermined pull value.For example: during engineering displacement value during test release direction 450N, control system is according to La Li – stroke curve, stroke value while inquiring release direction 450N, the trip value and stroke value corresponding to detent job initiation power are subtracted each other, the engineering displacement value in the time of just can obtaining release direction 450N.
By above-described embodiment, the purpose of this utility model is by fully effective having reached.The personage who is familiar with this technology should be understood that the utility model includes but not limited to accompanying drawing and the content of describing in embodiment above.Any modification that does not depart from function and structure principle of the present utility model all will be included in the scope of claims.
Claims (8)
1. the pick-up unit of a drum brake, it is characterized in that: comprise monitor station and control system, described monitor station is provided with electric cylinder, detection piece and the positioning seat of placing drum brake, described detection piece comprises pulling force sensor and displacement transducer, described pulling force sensor connects the drum brake in positioning seat by bracing wire, described electric cylinder drives bracing wire to pull drum brake to reach parking braking state and discharges bracing wire and makes drum brake reply original state, described pulling force sensor and displacement transducer detect respectively pulling force and the stroke of bracing wire in electric cylinder driving process, described pulling force sensor and displacement transducer are electrically connected to described control system.
2. the pick-up unit of a kind of drum brake according to claim 1, is characterized in that: described positioning seat is provided with the pneumatic displacement transducer corresponding with drum brake both sides friction disc, and described pneumatic displacement transducer is electrically connected to control system.
3. the pick-up unit of a kind of drum brake according to claim 1 and 2, it is characterized in that: described monitor station is provided with electric cylinder fixed mount and guy wire support, described electric cylinder is arranged on described electric cylinder fixed mount, described bracing wire is arranged on guy wire support, and described pulling force sensor is set between electric cylinder and bracing wire.
4. the pick-up unit of a kind of drum brake according to claim 3, is characterized in that: described displacement transducer connects described electric cylinder, pulling force sensor or bracing wire by connecting link.
5. the pick-up unit of a kind of drum brake according to claim 1 and 2, is characterized in that: between described pulling force sensor and bracing wire, be provided with bracing wire adjustment block.
6. the pick-up unit of a kind of drum brake according to claim 1 and 2, is characterized in that: described monitor station is provided with control box, described control system is set in described control box, and control system is provided with display screen.
7. the pick-up unit of a kind of drum brake according to claim 6, is characterized in that: described pick-up unit also comprises pilot lamp, and described pilot lamp is electrically connected to described control system.
8. the pick-up unit of a kind of drum brake according to claim 1 and 2, is characterized in that: described electric cylinder is servo electric jar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320503109.8U CN203422187U (en) | 2013-08-16 | 2013-08-16 | Detection device of drum-type brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320503109.8U CN203422187U (en) | 2013-08-16 | 2013-08-16 | Detection device of drum-type brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422187U true CN203422187U (en) | 2014-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320503109.8U Expired - Lifetime CN203422187U (en) | 2013-08-16 | 2013-08-16 | Detection device of drum-type brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203422187U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439045A (en) * | 2013-08-16 | 2013-12-11 | 浙江亚太机电股份有限公司 | Detecting device for drum brake |
| CN113203513A (en) * | 2021-04-26 | 2021-08-03 | 上海交通大学 | Elevator drum brake electromagnetic force real-time testing device |
-
2013
- 2013-08-16 CN CN201320503109.8U patent/CN203422187U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439045A (en) * | 2013-08-16 | 2013-12-11 | 浙江亚太机电股份有限公司 | Detecting device for drum brake |
| CN113203513A (en) * | 2021-04-26 | 2021-08-03 | 上海交通大学 | Elevator drum brake electromagnetic force real-time testing device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |