CN115979944A - Large-lateral-force rubber-coated piston friction force testing machine - Google Patents
Large-lateral-force rubber-coated piston friction force testing machine Download PDFInfo
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- CN115979944A CN115979944A CN202310209157.4A CN202310209157A CN115979944A CN 115979944 A CN115979944 A CN 115979944A CN 202310209157 A CN202310209157 A CN 202310209157A CN 115979944 A CN115979944 A CN 115979944A
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Abstract
The invention belongs to the technical field of piston friction force testing equipment, and particularly relates to a large-lateral-force rubber-coated piston friction force testing machine which comprises a rack and a linear moving mechanism, wherein the linear moving mechanism is fixed on the rack, a test slot is arranged on the rack, a balance weight hanging frame is arranged at the test slot, a mandrel is detachably connected onto the balance weight hanging frame, a rubber-coated piston is fixed on the mandrel, and the rubber-coated piston is positioned in the test slot and can move along the test slot; the lower end of the balance weight hanging frame is connected with a balance weight block; the linear moving mechanism is connected with the mandrel through the tension-compression type sensor, and pulls the traction sensor, the balance weight hanging frame, the mandrel and the rubber coating piston on the mandrel to move along the test slot through the linear moving mechanism. Obtaining a force value displacement curve according to a force value signal of the tension and pressure sensor and the displacement of the linear electric sliding table, and selecting a smooth section of the curve to output a friction value numerical value after calculation; the test cost of the test is lower, and the condition that one shock absorber needs to be damaged when the friction value of large lateral force is tested before is avoided.
Description
Technical Field
The invention belongs to the technical field of piston friction force testing equipment, and particularly relates to a large-lateral-force rubber-coated piston friction force testing machine.
Background
At present, the piston friction force test of domestic shock absorber manufacturers is derived from the German test standard of Georgil. Because of the structural limitation of the shock absorber, under the condition of large lateral force, the piston friction force test data is inaccurate and unstable.
As shown in fig. 9, the conventional piston side force test standard is limited by the structure, which affects the test result of the piston friction force and cannot bear large side force, generally below 500N. Moreover, the rubber-coated piston 6 is arranged in the working cylinder of the shock absorber and is soaked in oil, so that the rubber-coated piston can only test the friction coefficient in an oil (wet) state; meanwhile, the test cost is high, and one shock absorber needs to be damaged when the friction value of large lateral force is tested.
Disclosure of Invention
Aiming at the technical problem, the invention provides a large-lateral-force rubber-coated piston friction force testing machine which can test the friction force without damaging a shock absorber.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a friction force testing machine for a rubber-coated piston with large lateral force comprises a rack and a linear moving mechanism, wherein the linear moving mechanism is fixed on the rack, a test slot is arranged on the rack, a balance weight hanging frame is arranged at the test slot, a spindle is detachably connected to the balance weight hanging frame, a rubber-coated piston is fixed on the spindle, the upper end of the test slot is provided with an opening, and the rubber-coated piston is located in the test slot and can move along the test slot; the lower end of the balance weight hanging rack is connected with a balance weight block; the linear moving mechanism is connected with the mandrel through the tension-compression type sensor, and pulls the traction sensor, the balance weight hanging frame, the mandrel and the rubber coating piston on the mandrel to move along the test slot through the linear moving mechanism.
The linear moving mechanism adopts a linear motor, a base of the linear motor is fixedly connected with the rack, one end of the pull-press type sensor is fixed on a rotor seat of the linear motor, the other end of the pull-press type sensor is connected with the mandrel through a rope, and two ends of the rope are respectively fixedly connected with the other end of the pull-press type sensor and the mandrel.
The reset push rod is fixed on the linear moving mechanism, and the end part of the reset push rod can be contacted with the mandrel; the reset push rod is driven to move through the linear moving mechanism, and the reset push rod pushes the reset push rod, the balance weight hanging frame, the mandrel and the rubber coating piston on the mandrel to move along the test groove in the reverse direction.
A semi-cylindrical track is fixed on the rack, and two ends of the semi-cylindrical track are plugged to form test slots.
The balancing weight is located the bottom of frame, and the balancing weight passes through the connecting rod to be connected with the counter weight stores pylon, and the balancing weight can be dismantled with the connecting rod and be connected, and the connecting rod can pass frame and counter weight stores pylon fixed connection or articulated, is equipped with corresponding fluting in the frame.
The two sides of the balance weight hanging rack are detachably connected with a mandrel support, and two ends of the mandrel are respectively spliced with the mandrel support.
One end of the mandrel is provided with a circle of bulges, the mandrel is connected with a locking nut through threads, the rubber coating piston is positioned between the circle of bulges and the locking nut, and the rubber coating piston is fixed through the locking nut.
The rubber-coated piston is characterized by further comprising two mandrel gaskets, wherein the two mandrel gaskets are sleeved on the mandrel and are respectively located on two sides of the rubber-coated piston.
The rubber-covered piston further comprises a gasket pin, and the gasket pin can sequentially penetrate through the mandrel gasket on one side of the rubber-covered piston, the rubber-covered piston and the mandrel gasket on the other side of the rubber-covered piston.
One end of the mandrel is fixedly connected with the mandrel lifting ring, and the tension-compression type sensor is connected with the mandrel lifting ring.
Compared with the prior art, the invention has the following beneficial effects:
pulling the traction sensor, the balance weight hanging frame, the mandrel and the rubber coating piston on the mandrel to move along the test slot through the linear moving mechanism, obtaining a force value displacement curve according to a force value signal of the tension and compression sensor and the displacement of the linear electric sliding table, and selecting a smooth section of the curve to output a friction value after calculation; the test cost of the test is low, and the condition that one shock absorber needs to be damaged when the friction value of the large lateral force is tested before is avoided. The friction value test of the encapsulated piston under 300N to 1700N can be met; meanwhile, oil can be injected into the test groove according to actual conditions, and two friction coefficients of dry and wet can be tested.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of a half-section of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
FIG. 5 is a schematic view of the present invention showing one direction of the counterweight hanging bracket;
FIG. 6 is a schematic view of the counterweight hanging bracket of the present invention in another orientation;
FIG. 7 is an exploded view of the mandrel and encapsulated piston connection of the present invention;
FIG. 8 is a circuit schematic of the invention;
FIG. 9 is a schematic diagram of a test in the prior art;
wherein: 1 is the frame, 2 is linear movement mechanism, 3 is the test groove, 4 is the counter weight stores pylon, 5 is the dabber, 6 is the rubber coating piston, 7 is the balancing weight, 8 is the pressure formula sensor that draws, 9 is the rope, 10 is the push rod that resets, 11 is the semi-cylindrical track, 12 is the connecting rod, 13 is the fluting, 14 is the dabber support, 15 is the arch, 16 is lock nut, 17 is the dabber gasket, 18 is the gasket round pin, 19 is dabber rings.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1 to 7, the large-lateral-force rubber-coated piston friction testing machine comprises a rack 1 and a linear moving mechanism 2, wherein the linear moving mechanism 2 is fixed on the rack 1, a test slot 3 is arranged on the rack 1, a balance weight hanger 4 is arranged at the position of the test slot 3, a spindle 5 is detachably connected onto the balance weight hanger 4, a rubber-coated piston 6 is fixed onto the spindle 5, the upper end of the test slot 3 is open, and the rubber-coated piston 6 can be arranged in the test slot 3 through the upper end of the opening and can move along the test slot 3.
The lower end of the balance weight hanging frame 4 is connected with a balance weight 7; the side surface of the rubber-coating piston 6 is attached to the test slot 3, and the counterweight hanging frame 4 is pulled down through the counterweight 7, so that the rubber-coating piston 6 applies downward force to the test slot 3; meanwhile, the counter weight 7 with different weights can be replaced as required.
The linear moving mechanism 2 is connected with the mandrel 5 through the tension-compression type sensor 8, and the traction sensor, the balance weight hanging frame 4, the mandrel 5 and the rubber coating piston 6 on the mandrel are pulled to move along the test slot 3 through the linear moving mechanism 2.
Confirming whether oil needs to be added into the test slot 3 according to actual needs; the test procedure was as follows: pushing the balance weight hanging frame 4 to enable the rubber coating piston 6 to be located on one side of the test slot 3, then pulling the traction sensor, the balance weight hanging frame 4, the mandrel 5 and the rubber coating piston 6 on the mandrel to move along the test slot 3 through the linear moving mechanism 2, and enabling the rubber coating piston 6 to move for 100mm; and (3) obtaining a force value displacement curve according to a force value signal of the tension and compression sensor and a displacement signal (specifically obtained by a controller) of the linear electric sliding table, selecting a smooth section of the curve after calculation to output a friction value → after three times of reciprocating, outputting a final result of the friction value → disassembling the mandrel support 14 on one side, and then replacing the next group of encapsulated piston 6 test pieces.
Meanwhile, a corresponding industrial personal computer can be arranged and displays the force value displacement curve. The control circuit is designed by those skilled in the art according to the needs, and the circuit arrangement in fig. 8 can be used for reference, and other adjustment designs can be made, so that they are not described in detail herein.
Further, the linear moving mechanism 2 can be realized by other linear moving mechanisms 2 such as an air cylinder, an oil cylinder, an electric telescopic bar, a gear rack moving mechanism and the like; as long as the encapsulated piston 6 can be driven to move.
The linear moving mechanism 2 preferably adopts a linear motor (servo drive), a base of the linear motor is fixedly connected with the rack 1, one end of the tension-compression type sensor 8 is fixed on a rotor seat of the linear motor, the other end of the tension-compression type sensor 8 is connected with the mandrel 5 through a rope 9, and two ends of the rope 9 are respectively fixedly connected with the other end of the tension-compression type sensor 8 and the mandrel 5; i.e. the encapsulated piston 6 is pulled to move by the cord 9. The rope 9 is preferably a wire rope.
Further, in the test, the rubber-coated piston 6 needs to be manually moved to one side for resetting, and then pulled for testing after resetting, so that certain inconvenience exists in the test process. Therefore, the device also comprises a reset push rod 10, wherein the reset push rod 10 is fixed on the linear moving mechanism 2, and the end part of the reset push rod 10 can be contacted with the mandrel 5; the reset push rod 10 is driven by the linear moving mechanism 2 to move reversely, so that the reset push rod 10 pushes, the balance weight hanging frame 4, the mandrel 5 and the rubber coating piston 6 on the mandrel move reversely along the test slot 3, and the rubber coating piston 6 is reset to one side of the test slot 3. Can avoid manual reset through above-mentioned structure setting, pull and test, promote and reset.
Further, the test slot 3 may be directly implemented by the slot 13 in the rack 1, or may be implemented by the following structure: namely, a semi-cylindrical track 11 is fixed on the frame 1, and two ends of the semi-cylindrical track 11 are sealed to form the test slot 3.
Further, balancing weight 7 is located the bottom of frame 1, and balancing weight 7 passes through connecting rod 12 to be connected with counter weight stores pylon 4, and balancing weight 7 can be dismantled with connecting rod 12 and be connected, and connecting rod 12 can pass frame 1 and counter weight stores pylon 4 fixed connection or articulated, is equipped with corresponding fluting 13 in the frame 1, and connecting rod 12 can be followed fluting 13 and removed, does not influence rubber coating piston 6 and removes along test groove 3. Preferably by hinged connection
Furthermore, various structures can be adopted to realize the detachable connection of the mandrel 5, such as insertion, clamping, bolt connection and the like; the following structure is preferably employed: the both sides of counter weight stores pylon 4 can be dismantled and be connected with dabber support 14, specific accessible bolted connection: two ends of the mandrel 5 are respectively inserted into the mandrel support 14. When the mandrel support 14 on one side is dismounted, the mandrel 5 is drawn out.
Further, in order to conveniently fix and disassemble the rubber-coated piston 6, the following structure is adopted: one end of the mandrel 5 is provided with a circle of bulges 15, the mandrel 5 is connected with a locking nut 16 through threads, the rubber-coated piston 6 is positioned between the circle of bulges 15 and the locking nut 16, and the bulges 15 and the locking nut 16 are tightly clamped and fixed with the rubber-coated piston 6 by screwing the locking nut 16.
Further, in order to avoid damage to the rubber piston 6 caused by the lock nut 16 and the protrusion 15, the rubber piston further comprises two mandrel gaskets 17, and the two mandrel gaskets 17 are sleeved on the mandrel 5 and are respectively located on two sides of the rubber piston 6.
Further, in order to fix the positions of the encapsulation piston 6 and the mandrel gasket 17, corresponding pin shafts may be provided, so that a gasket pin 18 is further provided, and the gasket pin 18 may sequentially pass through the mandrel gasket 17 on one side of the encapsulation piston 6, and the mandrel gasket 17 on the other side of the encapsulation piston 6.
Furthermore, in order to facilitate connection with the tension-compression type sensor 8 (rope 9), a mandrel hoisting ring 19 is fixedly connected to one end of the mandrel 5, and the tension-compression type sensor 8 is connected with the mandrel hoisting ring 19; specifically, the method comprises the following steps: the rope 9 may be tethered to a mandrel eye 19.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (10)
1. The utility model provides a big yawing force rubber coating piston friction test machine which characterized in that: the rubber coating device comprises a rack (1) and a linear moving mechanism (2), wherein the linear moving mechanism (2) is fixed on the rack (1), a test slot (3) is arranged on the rack (1), a balance weight hanging frame (4) is arranged at the test slot (3), a spindle (5) is detachably connected onto the balance weight hanging frame (4), a rubber coating piston (6) is fixed onto the spindle (5), the upper end of the test slot (3) is open, and the rubber coating piston (6) is located in the test slot (3) and can move along the test slot (3); the lower end of the balance weight hanging frame (4) is connected with a balance weight block (7); the linear moving mechanism (2) is connected with the mandrel (5) through the tension-compression type sensor (8), and the traction sensor, the balance weight hanging frame (4), the mandrel (5) and the rubber coating piston (6) on the mandrel are pulled to move along the test slot (3) through the linear moving mechanism (2).
2. The high lateral force encapsulated piston friction tester of claim 1, wherein: the linear moving mechanism (2) adopts a linear motor, a base of the linear motor is fixedly connected with the rack (1), one end of the pull-press type sensor (8) is fixed on a rotor seat of the linear motor, the other end of the pull-press type sensor (8) is connected with the mandrel (5) through a rope (9), and two ends of the rope (9) are respectively fixedly connected with the other end of the pull-press type sensor (8) and the mandrel (5).
3. A high lateral force encapsulated piston friction tester as claimed in claim 1 or 2, wherein: the device is characterized by further comprising a reset push rod (10), wherein the reset push rod (10) is fixed on the linear moving mechanism (2), and the end part of the reset push rod (10) can be in contact with the mandrel (5); the reset push rod (10) is driven to move through the linear moving mechanism (2), and the reset push rod (10) pushes, the balance weight hanging frame (4), the mandrel (5) and the rubber coating piston (6) on the mandrel move along the test slot (3) in the reverse direction.
4. The high lateral force encapsulated piston friction tester of claim 1, wherein: the testing device is characterized in that a semi-cylindrical track (11) is fixed on the rack (1), and two ends of the semi-cylindrical track (11) are plugged to form a testing groove (3).
5. The high lateral force encapsulated piston friction tester of claim 1, wherein: the counterweight block (7) is located at the bottom of the frame (1), the counterweight block (7) is connected with the counterweight hanging frame (4) through a connecting rod (12), the counterweight block (7) is detachably connected with the connecting rod (12), the connecting rod (12) can penetrate through the frame (1) to be fixedly connected or hinged with the counterweight hanging frame (4), and a corresponding slot (13) is formed in the frame (1).
6. The high lateral force encapsulated piston friction tester of claim 1, wherein: the two sides of the balance weight hanging rack (4) are detachably connected with a mandrel support (14), and two ends of the mandrel (5) are respectively spliced with the mandrel support (14).
7. The encapsulated piston friction test machine with large lateral force of claim 1, characterized in that: one end of the mandrel (5) is provided with a circle of protrusions (15), the mandrel (5) is connected with a locking nut (16) through threads, the rubber-coated piston (6) is located between the circle of protrusions (15) and the locking nut (16), and the rubber-coated piston (6) is fixed through the locking nut (16).
8. The encapsulated piston friction test machine of claim 7, wherein: the rubber-coated piston is characterized by further comprising two mandrel gaskets (17), wherein the two mandrel gaskets (17) are sleeved on the mandrel (5) and are respectively located on two sides of the rubber-coated piston (6).
9. The high lateral force encapsulated piston friction tester of claim 8, wherein: the rubber coating piston further comprises a gasket pin (18), and the gasket pin (18) can sequentially penetrate through the mandrel gasket (17) on one side of the rubber coating piston (6), the rubber coating piston (6) and the mandrel gasket (17) on the other side of the rubber coating piston (6).
10. The high lateral force encapsulated piston friction tester as claimed in any one of claims 1 to 9, wherein: one end of the mandrel (5) is fixedly connected with a mandrel lifting ring (19), and the pull-press type sensor (8) is connected with the mandrel lifting ring (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310209157.4A CN115979944A (en) | 2023-03-07 | 2023-03-07 | Large-lateral-force rubber-coated piston friction force testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310209157.4A CN115979944A (en) | 2023-03-07 | 2023-03-07 | Large-lateral-force rubber-coated piston friction force testing machine |
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| CN115979944A true CN115979944A (en) | 2023-04-18 |
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| CN202310209157.4A Pending CN115979944A (en) | 2023-03-07 | 2023-03-07 | Large-lateral-force rubber-coated piston friction force testing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116926729A (en) * | 2023-09-12 | 2023-10-24 | 山西新环精密制造股份有限公司 | Steel belt structure for spindle conveying |
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2023
- 2023-03-07 CN CN202310209157.4A patent/CN115979944A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116926729A (en) * | 2023-09-12 | 2023-10-24 | 山西新环精密制造股份有限公司 | Steel belt structure for spindle conveying |
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