CN215066067U - Constant speed friction material test device - Google Patents
Constant speed friction material test device Download PDFInfo
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- CN215066067U CN215066067U CN202022752153.5U CN202022752153U CN215066067U CN 215066067 U CN215066067 U CN 215066067U CN 202022752153 U CN202022752153 U CN 202022752153U CN 215066067 U CN215066067 U CN 215066067U
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Abstract
A constant-speed friction material testing device belongs to the field of clutch part inspection equipment. The utility model aims at adopting permanent magnet in-wheel motor, semiconductor heating, refrigeration piece, load sensor, torque sensor direct measurement comprehensive techniques such as frictional force to can the accurate measurement frictional force the constant speed friction material test device. The utility model is characterized in that a bottom beam is fixedly arranged on a base, four upright posts are fixedly arranged on the bottom beam through bolts, and a beam is fixedly arranged at the upper ends of the four upright posts through locking nuts; the crossbeam is provided with a load measuring unit structure, and the bottom beam is provided with a friction disc operation mechanism. The utility model discloses a permanent magnet wheel hub motor for the revolution is continuously adjustable, and the direct design value power of operation interface simplifies the operation, utilizes torque sensor direct measurement frictional force, eliminates the circulating water refrigeration, reduces service environment requirement, reduces the pollutant and discharges, reduces the dust and to operating personnel and environmental pollution, has the automatic measure function, improves work efficiency and reduces intensity of labour.
Description
Technical Field
The utility model belongs to clutch part inspection equipment field.
Background
Along with the development of the automobile industry, people have higher and higher requirements on the comfort and the stability of automobile driving, and the clutch is used as an important component of an automobile transmission system and provides higher requirements on the comprehensive performance of a clutch driven disc. The friction coefficient of a driven disc friction plate has an important influence on the performance of a clutch assembly, because the torque of an engine is constant, the pressing force of the clutch cover assembly is fixed, if the friction force between the driven disc and a cover assembly pressure plate is too small, if the clutch assembly is required to normally transmit torque, the pressing force of the clutch cover assembly pressure plate needs to be increased, the pressing force and the separating force of a clutch cover assembly diaphragm spring are inevitably increased, and the processing cost of the diaphragm spring is increased, and the driving comfort is influenced. Under the condition that the pressing force of the cover assembly is fixed, the friction torque can be increased by properly increasing the friction coefficient, so that the clutch cover assembly and the driven plate assembly are quickly synchronized, the sliding film time is reduced, and the service life of the clutch assembly is prolonged. However, when the pressing force of the clutch cover assembly is fixed, if the friction coefficient of the driven plate is too large, the transmission torque of the transmission pair of the clutch assembly is too fast, so that jerk is caused, the service life of the clutch assembly is affected, and the driving comfort is also affected. In addition, when the new pressing force and the old pressing force of the clutch cover assembly are fixed, the wear rate can affect the service life of the clutch assembly, and the wear rate can affect the service life of the clutch assembly. Therefore, the friction plate with a proper friction coefficient and a smaller wear rate is selected to have a crucial influence on the clutch assembly and the performance of the whole vehicle. Therefore, how to select the friction plate is particularly important for the design and qualification judgment of the clutch driven plate assembly.
At present, a common constant-speed friction material tester is a constant-speed friction material tester taking an HP-S type constant-speed friction tester and an XD-MSM of Suiyang friction material research institute as prototypes. Such constant-speed friction material testing machines have some disadvantages:
1. the equipment only has a semi-automatic measurement function, and is considered to be operated more;
2. the continuous operation of the equipment has higher noise;
3. the tap water circularly dissipates heat, the consumption of the tap water is large, and in addition, the friction material is divided to be discharged together with the tap water to cause environmental pollution;
4. the equipment only has one point of friction type temperature measuring thermocouple, and the temperature control and measurement precision is low;
5. the electric heating pipe is not tightly attached to the friction disc, so that the temperature control precision is influenced.
Disclosure of Invention
The utility model aims at adopting permanent magnet in-wheel motor, semiconductor heating, refrigeration piece, load sensor, torque sensor direct measurement comprehensive techniques such as frictional force to can the accurate measurement frictional force the constant speed friction material test device.
The utility model is characterized in that a bottom beam is fixedly arranged on a base, four upright posts are fixedly arranged on the bottom beam through bolts, and a beam is fixedly arranged at the upper ends of the four upright posts through locking nuts;
a fixed shaft of the hub motor is fixedly arranged on the bottom beam through a fastening nut, a friction disc is arranged on an outer rotor of the hub motor through a fixedly arranged rotating transmission shaft, a torque sensor is arranged at the contact position of the rotating transmission shaft and the friction disc, and a collecting ring is arranged between the torque sensor and the outer rotor;
the device comprises a beam, a speed reducer, a screw rod, a load sensor fixing disc, a sample supporting disc, a load sensor fixing disc, a sample supporting disc and a steel ball, wherein the speed reducer is fixedly mounted on the beam, the speed reducer is connected with a servo motor, the screw rod is connected with the speed reducer, the bottom end of the screw rod is connected to the load sensor fixing disc, two ends of the load sensor fixing disc are inserted into balance bolts and fastened through balance bolt locking nuts, the bottom end of each balance bolt is fixedly mounted on the sample supporting disc, a load balance spring is sleeved on each balance bolt between the sample supporting disc and the load sensor fixing disc, the load sensor is mounted in the middle of the load sensor fixing disc, a conical opening is formed in the sample supporting disc corresponding to the middle of the load sensor, and the steel ball is placed between the conical opening and the load sensor; a guide post is fixedly arranged on the sample supporting disk and inserted on the cross beam; the sample connecting block is arranged below the sample supporting plate and corresponds to the friction disc;
the friction disc has the following structure: the friction disc comprises an upper surface of the friction disc and a lower surface of the friction disc, the upper surface of the friction disc is connected with the lower surface of the friction disc through a plurality of support columns, a platinum resistor embedding point is arranged on the surface of the upper surface of the friction disc at a position corresponding to the sample connecting block, and a heating and cooling plate and a cooling fin are arranged on the inner surface of the upper surface of the friction disc;
and the left side, the right side and the rear side of the area formed by the four upright posts are provided with dust removal air inlets, and the dust remover is communicated with the dust removal air inlets through a dust removal channel.
The utility model discloses a permanent magnet wheel hub motor for the revolution is continuously adjustable, and the direct design value power of operation interface simplifies the operation, utilizes torque sensor direct measurement frictional force, eliminates the circulating water refrigeration, reduces service environment requirement, reduces the pollutant and discharges, reduces the dust and to operating personnel and environmental pollution, has the automatic measure function, improves work efficiency and reduces intensity of labour.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a part of the load cell of the present invention;
FIG. 3 is a schematic structural view of a friction disk of the present invention;
fig. 4 is a schematic block circuit diagram of the present invention;
fig. 5 is a circuit diagram of the temperature controller of the present invention;
fig. 6 is a circuit diagram of the dc power supply of the present invention;
fig. 7 is a circuit diagram of the filter module of the present invention.
Detailed Description
The utility model is characterized in that a base 15 is fixedly provided with a bottom beam 16, the base 15 and the bottom beam 16 form the support of the whole device, the bottom beam 16 is fixedly provided with four upright posts 21 through bolts, the four upright posts 21 enclose a cuboid space, and the upper ends of the four upright posts 21 are fixedly provided with a beam 1 through locking nuts 6; crossbeam 1 and floorbar 16 all are a flat board, and crossbeam 1 covers the higher authority in cuboid space, and floorbar 16 then covers the bottom in cuboid space, and the utility model discloses an other parts are all with two dull and stereotyped center installations from top to bottom, guarantee that other parts are arranged in four stands and are enclosed into inside the space.
A fixed shaft 14 of the hub motor is fixedly arranged on a bottom beam 16 through a fastening nut 13, a friction disc 9 is arranged on an outer rotor 12 of the hub motor through a fixedly arranged rotating transmission shaft 17, a torque sensor 10 is arranged at the contact position of the rotating transmission shaft 17 and the friction disc 9, and a collecting ring 11 is arranged between the torque sensor 10 and the outer rotor 12; the hub motor is a structure taking a shaft as a stator (namely a fixed shaft 14), an outer rotor 12 outputs power, a friction disc 9 fixedly arranged with the outer rotor 12 is driven to be selectively installed together through the rotation of the outer rotor 12, and a torque sensor 10 obtains torque force through rotation.
A speed reducer 3 is fixedly installed on a cross beam 1, the speed reducer 3 is connected with a servo motor 5, a lead screw 4 is connected with the speed reducer 3, the bottom end of the lead screw 4 is connected with a load sensor fixing disc 25, two ends of the load sensor fixing disc 25 are inserted into balance bolts 24 and fastened through balance bolt locking nuts 23, the bottom end of each balance bolt 24 is fixedly installed on a sample supporting disc 7, a load balance spring 22 is sleeved on each balance bolt 24 between each sample supporting disc 7 and the load sensor fixing disc 25, a load sensor 26 is installed in the middle of each load sensor fixing disc 25, a conical opening 28 is formed in each sample supporting disc 7 corresponding to the middle of each load sensor 26, and a steel ball 27 is placed between each conical opening 28 and each load sensor 26; a guide post 2 is fixedly arranged on the sample supporting disk 7, and the guide post 2 is inserted on the cross beam 1; the sample connecting block 8 is arranged below the sample supporting plate 7 and corresponds to the friction disc 9; the servo motor 5 and the speed reducer 3 are power mechanisms of the screw rod 4 and are used for driving the screw rod 4 to move up and down. All mechanisms below the screw rod 4, which is used as a suspension rod moving up and down, can move up and down until the sample connecting block 8 is in contact with the upper surface of the friction disc 9. Three balance bolts 24 which are uniformly distributed at 120 degrees are fixed on a sample supporting disc 7, the other ends of the balance bolts 24 penetrate through three load balance springs 22 and a load sensor fixing disc 25 respectively and then are pre-fixed by three balance bolt locking nuts (balance bolt locking nuts 23), a steel ball 27 is arranged in a conical opening 28 of the sample supporting disc 7, the steel ball 27 is positioned between a load sensor 26 and the sample supporting disc 7, and the conical opening, the steel ball and a 9-load sensor are matched, so that the influence of torque force on load testing precision can be effectively eliminated. And adjusting three balance bolt locking nuts to enable the sample supporting disk to transmit 10N of force to the load sensor through the steel ball, and then continuously adjusting the balance locking nuts to enable the sample supporting disk to be parallel to the friction disk 9. The guide post 2 is a guide rod which simply plays a role in guiding, can penetrate through the cross beam 1 to move up and down, and the gap between the reserved holes of the guide post 2 on the cross beam 1 is as small as possible, so that the sample supporting disc 7 cannot be inclined under the driving of the screw rod 4.
Construction of the friction disk 9: the friction disc 9 comprises a friction disc upper surface 93 and a friction disc lower surface 95, the friction disc upper surface 93 and the friction disc lower surface 95 are connected through a plurality of support columns 96, a platinum resistor embedding point 94 is arranged on the surface of the friction disc upper surface 93 corresponding to the position of the sample connecting block 8, and a heating and cooling plate 92 and a cooling fin 91 are arranged on the inner surface of the friction disc upper surface 93; the friction disc structure is as shown in fig. 3, three embedded platinum resistors are uniformly distributed at 120 degrees and embedded in platinum resistor embedding points on the upper surface of the friction disc, a plurality of groups of heating and cooling plates are attached to the lower surface of the friction disc, and a plurality of groups of radiating fins are attached to the heating and cooling plates and then fixed to the lower surface of the friction disc. The upper surface of the friction disc and the lower surface of the friction disc are connected and fixed by uniformly distributed support columns, and ventilation windows are formed among the support columns so as to dissipate heat.
The left side, the right side and the rear side of an area formed by four upright posts 21 are provided with dust removing air inlets 18, and a dust remover 19 is communicated with the dust removing air inlets 18 through a dust removing channel 20. When the friction disk rotates, the sample connecting block 8 contacts and rubs with the friction disk, some dust is generated, and the dust can influence the detection result of the utility model, so, the dust collection mechanism is installed at the left side, the right side and the rear side, and the dust collection mechanism is arranged on the other three sides except the front side for providing the personnel operating equipment.
The electric control system part is shown as an electric control system block diagram in fig. 4, all signal acquisition and control output of the system are completed by a computer, and a display completes operation interface display. The RS232 interface board, the RS485 interface board and the I/O card are all inserted on the computer mainboard. The load sensor and the torque sensor are connected to the signal conditioning module, and load and torque signals are processed by the signal conditioning module, input to the data acquisition card and processed by the computer. The servo motor and the encoder are connected to the servo driver, the control signal of the servo driver is connected to the RS232 interface board, and the computer completes control through the RS232 interface board. The hub motor is connected to the hub motor driver, the control signal of the hub motor is connected to the RS232 interface board, and the control is completed by the computer through the RS232 interface board. The three platinum resistors are fixed in the platinum resistor embedding point shown in fig. 3, and the platinum resistor signal end is connected to the temperature controller, processed into an RS485 transmission signal and then accessed into a computer through an RS485 interface board for signal processing. The computer completes the control of the heating and refrigerating control unit and the dedusting control unit through the I/O card.
The wiring of the temperature controller is shown as the temperature controller in fig. 5, three platinum resistors are fixed in the platinum resistor embedding point in fig. 3, and the platinum resistor signal ends are respectively connected with the +, -electrodes corresponding to the temperature controller sensor input sections CH1, CH2, CH3 according to the +, -electrodes. The power supply section supplies power DC24V +, -which are respectively and correspondingly connected with the DC power output end DC +, -end of the figure 6, thus completing the power supply of the temperature controller. The plus and minus ends of the communication section RS485 are respectively connected with the corresponding plus and minus ends of the RS485 interface board in the figure 4 according to a half-duplex mode, and the signal wire shielding wire is grounded.
As shown in the dc power supply of fig. 6, the ac 220V power supply filtered by L3 and L4 of fig. 7 is connected to the input end U, N of the T1 transformer of fig. 6, and the output end of the T1 transformer is connected to the bridge circuit formed by diodes D1, D2, D3, and D4 to deliver dc voltage. The direct current positive electrode is connected with an FU1 fuse and the positive electrode of a C1 capacitor, and the direct current negative electrode is connected with the negative electrode of C1. The diodes D5 and D6, the integrated block LM317, the capacitor C3, the resistor R1 and the potentiometer RP1 jointly form a direct-current power supply adjusting loop, and the output end of the circuit achieves stable direct current 24V by adjusting the potentiometer RP 1. The positive pole of the filter capacitor C2 is connected with 24V +, and the negative pole is connected with 24V-, so that the direct current 24V is more stable.
Fig. 7 shows a two-stage series low-pass filter module, where L1 and L2 are ac 220V input terminals, and L3 and L4 are ac 220V output terminals after filtering. The direct current 24V power supply module formed by fig. 6 and 7 can suppress electromagnetic interference between the line and the ground, output smooth direct current 24V and provide good power supply for each electric device.
The utility model discloses during the use, install sample connecting block 8 on sample supporting disk 7 earlier, then adjusted load measurement unit structure (fig. 2 part), then open servo motor 5, drive lead screw 4 downstream through speed reducer 3, until sample connecting block 8 and friction disk 9 contact, power during the contact is decided according to the experiment requirement, then start in-wheel motor, friction disk 9 will rotate like this, then collect torque force and load force respectively through torque sensor 10 and load sensor 26, thereby just can be according to the accurate coefficient of friction who calculates sample connecting block 8 of current computational formula, the friction ratio promptly.
Claims (1)
1. The utility model provides a constant speed friction material test device which characterized in that: a bottom beam (16) is fixedly arranged on the base (15), four upright posts (21) are fixedly arranged on the bottom beam (16) through bolts, and a cross beam (1) is fixedly arranged at the upper ends of the four upright posts (21) through locking nuts (6);
a fixed shaft (14) of the hub motor is fixedly arranged on a bottom beam (16) through a fastening nut (13), a friction disc (9) is arranged on an outer rotor (12) of the hub motor through a fixedly arranged rotating transmission shaft (17), a torque sensor (10) is arranged at the contact position of the rotating transmission shaft (17) and the friction disc (9), and a collecting ring (11) is arranged between the torque sensor (10) and the outer rotor (12);
a speed reducer (3) is fixedly arranged on the cross beam (1), the speed reducer (3) is connected with a servo motor (5), a lead screw (4) is connected with the speed reducer (3), the bottom end of the lead screw (4) is connected on a load sensor fixing disc (25), two ends of a load sensor fixing disc (25) are inserted into balance bolts (24) and fastened through balance bolt locking nuts (23), the bottom ends of the balance bolts (24) are fixedly arranged on a sample supporting disc (7), a load balance spring (22) is sleeved on a balance bolt (24) between the sample supporting disk (7) and the load sensor fixing disk (25), a load sensor (26) is arranged in the middle of the load sensor fixed disc (25), a conical opening (28) is arranged on the sample supporting disk (7) corresponding to the middle part of the load sensor (26), a steel ball (27) is arranged between the cone mouth (28) and the load sensor (26); a guide post (2) is fixedly arranged on the sample supporting disk (7), and the guide post (2) is inserted on the cross beam (1); the sample connecting block (8) is arranged below the sample supporting disc (7) and corresponds to the friction disc (9);
structure of the friction disc (9): the friction disc (9) comprises an upper surface (93) and a lower surface (95) of the friction disc, the upper surface (93) and the lower surface (95) of the friction disc are connected through a plurality of support columns (96), a platinum resistor embedding point (94) is arranged on the surface of the upper surface (93) of the friction disc at a position corresponding to the test sample connecting block (8), and a heating and cooling plate (92) and a cooling fin (91) are arranged on the inner surface of the upper surface (93) of the friction disc;
the left side, the right side and the rear side of an area formed by the four upright posts (21) are provided with dust removal air inlets (18), and a dust remover (19) is communicated with the dust removal air inlets (18) through a dust removal channel (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022752153.5U CN215066067U (en) | 2020-11-25 | 2020-11-25 | Constant speed friction material test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022752153.5U CN215066067U (en) | 2020-11-25 | 2020-11-25 | Constant speed friction material test device |
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| CN215066067U true CN215066067U (en) | 2021-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378844A (en) * | 2020-11-25 | 2021-02-19 | 长春一东离合器股份有限公司 | Constant speed friction material test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378844A (en) * | 2020-11-25 | 2021-02-19 | 长春一东离合器股份有限公司 | Constant speed friction material test device |
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