CN109900408B - Electric servo loading device for friction material chase testing machine - Google Patents
Electric servo loading device for friction material chase testing machine Download PDFInfo
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- CN109900408B CN109900408B CN201910220263.6A CN201910220263A CN109900408B CN 109900408 B CN109900408 B CN 109900408B CN 201910220263 A CN201910220263 A CN 201910220263A CN 109900408 B CN109900408 B CN 109900408B
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- 238000012360 testing method Methods 0.000 title claims abstract description 73
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Abstract
The invention provides an electric servo loading device for a friction material chase testing machine, which is characterized in that a main shaft is arranged on a main shaft supporting table in a main shaft mechanism, a swing arm is coaxially and rotatably arranged outside one end of the main shaft through a shaft sleeve, a friction drum is coaxially fixed on the end surface of the shaft sleeve, the central lines of the output ends of a test piece clamp, a test piece hook, a guide mechanism, a loading force sensor, a ball screw transmission mechanism and a motor transmission mechanism are intersected with the central line of the main shaft, a loading force calibration mechanism is connected with the top of the test piece hook, and the friction force measurement mechanism and the friction force calibration mechanism are horizontally collinear and respectively arranged on the main shaft supporting tables on two sides of the main shaft. The invention adopts an electric servo technology, ensures that the force line of the loading force measuring mechanism passes through the center of the main shaft, cancels the lever in the friction force measurement, changes the direct connection of the tension sensor, reduces the measurement error, and ensures the accuracy and the reproducibility of the test result.
Description
Technical Field
The invention belongs to the field of friction material friction and wear testing machines, and particularly relates to an electric servo loading device for a friction material chase testing machine.
Background
Existing friction material chase testers, which implement the SAEJ661 standard and the GB/T17469-1998 standard, are derived from an initial design thirty years ago. As shown in fig. 1, the structure of the loading mechanism of the testing machine specified in the standard is schematically shown, and as is obvious from the figure, the testing machine specified in the standard adopts weight loading. As shown in FIG. 2, a schematic structural diagram of a loading device of a test model with wider practicability in the prior art is shown, wherein a primary friction drum I and a primary main shaft center II are coaxially installed, a primary test piece clamp III is installed above a primary loading center VI to realize the implementation of loading force, a primary loading force sensor V and a loading oil cylinder or an air cylinder are sequentially arranged below the primary loading center VI, the loading device is realized by adopting the loading oil cylinder or the air cylinder VIII, in addition, the primary friction force sensor VII is installed below one side of the loading device, a primary friction force calibration mechanism IV is installed above the other side of the loading device, and the transmission of friction force is realized between the primary friction force sensor VII and the primary friction force calibration mechanism IV through a lever.
The loading device of the existing friction material chase testing machine has the main defects that:
1. The loading cylinder or the air cylinder is adopted to realize the loading, so that the force line central line of the loading device is difficult to ensure to pass through the rotation center of the main shaft strictly, and the accuracy and the repeatability of the friction force and the friction coefficient test result are seriously affected;
2. The transmission of friction force between the friction force sensor and the friction force calibration mechanism is realized through one lever, and the accuracy of the measurement result is further influenced.
The defects are main technical defects which prevent the friction material chase testing machine from being popularized and applied.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an electric servo loading device for a friction material chase testing machine, which adopts a novel electric servo technology, and can rotate around the central line of a main shaft on the basis of strictly ensuring that the force line of the loading device passes through the central line of the main shaft, thereby ensuring the accuracy and reproducibility of a testing result. The technical scheme of the invention is as follows:
An electric servo loading device for a friction material chase testing machine comprises a main shaft mechanism, a loading force measuring mechanism, a loading force calibrating mechanism, a friction force measuring mechanism and a friction force calibrating mechanism, wherein in the main shaft mechanism, a main shaft 4 is arranged on a main shaft supporting table 32, a swing arm 6 is coaxially and rotatably arranged outside one end of the main shaft 4 through a shaft sleeve 2, and a friction drum 8 is coaxially and fixedly arranged on the end face of the shaft sleeve 2;
The loading force measuring mechanism is formed by sequentially connecting a test piece clamp 12, a test piece hook 11, a guide mechanism, a loading force sensor 15, a ball screw transmission mechanism, a motor transmission mechanism and a servo motor 21 from top to bottom, and the central lines of the output ends of the test piece clamp 12, the test piece hook 11, the guide mechanism, the loading force sensor 15, the ball screw transmission mechanism and the motor transmission mechanism are intersected with the central line of the main shaft 4;
the loading force calibration mechanism is connected with the top of the test piece hook 11;
The friction force measuring mechanism and the friction force calibrating mechanism are respectively arranged on the main shaft supporting tables 32 on two sides of the main shaft 4 along horizontal collineation.
Further, the main shaft mechanism consists of a bearing seat 1, a shaft sleeve 2, a main shaft 4, a main shaft supporting bearing 5, a swing arm 6, a swing arm supporting bearing 3, a shaft end flange 7, a friction drum 8 and a main shaft supporting table 32;
The bearing pedestal 1 is fixed on the main shaft supporting table 32, one end of the shaft sleeve 2 is sleeved in the bearing pedestal 1, two ends of the main shaft 4 are installed in the shaft sleeve 2 through main shaft supporting bearings 5, the top of the swing arm 6 is sleeved at the other end of the shaft sleeve 2 through the swing arm supporting bearings 3, and the friction drum 8 is installed at the end part of the main shaft 4 through a shaft end flange 7.
Further, the guide mechanism is composed of a sliding block 9 and a linear guide rail 10, the sliding block 9 is fixed at the lower end of the test piece hook 11, and the linear guide rail 10 is fixed on the swing arm 6 along the length direction of the swing arm 6.
Further, the ball screw transmission mechanism consists of a nut sleeve 16, a rolling bearing screw 17, a nut sleeve anti-rotation component and a proximity switch 31;
The top end of the nut sleeve 16 is connected with the loading force sensor 15 through a spherical hinge bearing 23, the nut sleeve 16 is sleeved on the outer side of the rolling bearing screw 17 and forms a ball screw transmission pair through threaded cooperation of a screw nut fixed on the inner side of the nut sleeve 16 and the rolling bearing screw 17, a nut sleeve anti-rotation component is arranged on a transmission connecting table 33 on the side surface of the nut sleeve 16, and the nut sleeve 16 is connected with the nut sleeve anti-rotation component, so that the nut sleeve 16 only performs axial linear motion under the rotary drive of the rolling bearing screw 17;
The proximity switch 31 is installed on the side of the swing arm 6 at a height position corresponding to the highest position of the movement of the nut cover 16.
Further, the nut sleeve anti-rotation component consists of a nut sleeve anti-rotation guide post 34 and an anti-rotation sleeve;
the nut sleeve anti-rotation guide post 34 is fixed on the transmission connection table 33 at one side of the nut sleeve 16 in parallel, the anti-rotation sleeve is fixedly connected on the outer wall of the nut sleeve 16, and the anti-rotation sleeve is sleeved on the outer surface of the nut sleeve anti-rotation guide post 34.
Further, the motor transmission mechanism is arranged at the bottom of a transmission connection table 33 below the swing arm 6 and consists of a driven toothed belt wheel 18, a toothed belt 19 and a driving toothed belt wheel 20;
the driven toothed belt wheel 18 is used as the output end of a motor transmission mechanism and is coaxially connected with a rolling bearing screw rod 17 in a ball screw transmission mechanism in a transmission way, the driving toothed belt wheel 20 is connected with the driven toothed belt wheel 18 in a transmission way through a toothed belt 19, and the driving toothed belt wheel 20 is coaxially arranged at the output end of a servo motor 21.
Further, the loading force calibration mechanism consists of a connecting plate 30, a third support 28, a loading force calibration lever 29 and a loading force weight tray 22;
one end of a loading force calibration lever 29 is connected with the top of the test piece hook 11 through a connecting plate 30, a third support 28 is arranged on the upper surface of a main shaft supporting table 32, the middle part of the loading force calibration lever 29 is supported on the third support 28, and a loading force weight tray 22 is hung at the other end of the loading force calibration lever 29.
Further, the friction force measuring mechanism consists of a first support 14, a spherical hinge bearing 23 and a friction force sensor 13;
The first support 14 is fixed on the main shaft supporting table 32, one end of the friction sensor 13 which is horizontally arranged is connected on the first support 14 through a spherical hinge bearing 23, and the other end of the friction sensor 13 is hinged on the swing arm 6 through another spherical hinge bearing 23.
Further, the friction force calibration mechanism is arranged on the device and consists of a stay wire 24, a second support 25, an L-shaped lever 26 and a friction force weight disc 27;
One end of a stay wire 24 is connected to the swing arm 6 through a spherical hinge bearing 23, the other end of the stay wire 24 is connected with one end of an L-shaped lever 26, a second support 25 is fixed on a main shaft supporting table 32, a bending point in the middle of the L-shaped lever 26 is hinged to the second support 25, and a friction weight tray 26 is hung to the other end of the L-shaped lever 26.
Further, the swing arm 6 is composed of a swing arm pipe sleeve 601, a swing arm connecting frame 602, a swing arm stand 603 and a guide rail mounting seat 604;
The swing arm pipe sleeve 601 is fixed at the top of swing arm grudging post 603, and swing arm link 602 is fixed in swing arm grudging post 603 top and is located the position of swing arm pipe sleeve 601 bottom, is equipped with one on the below lateral wall of swing arm grudging post 603 and opens has the connection boss, and guide rail mount pad 604 is fixed on swing arm grudging post 603 along the length direction of swing arm grudging post 603.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the electric servo loading device, a hydraulic station is omitted, the electric servo is used for loading, the loading process is controlled more accurately, and the maintenance cost of the manufacturing machine is lower;
2. The electric servo loading device strictly ensures that a loading force line passes through the center of the main shaft, the loading device can rotate around the center of the main shaft, and after the loading device is installed, the loading device does not need secondary adjustment and centering, so that the test result is more accurate and reproducible;
3. According to the invention, a lever is omitted in the friction force measuring structure of the electric servo loading device, the tension sensor is directly connected, the friction force directly acts on the sensor, the measuring error is reduced, and the test result is more accurate.
Drawings
FIG. 1 is a schematic diagram of a loading mechanism of a testing machine specified in the standard;
FIG. 2 is a schematic diagram of a loading device of a test model in the prior art;
FIG. 3 shows an electric servo loading device for a friction material chase testing machine according to the present invention;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a schematic diagram of a loading force calibration mechanism in the electric servo loading device according to the present invention;
FIG. 6 is a schematic diagram of a friction calibration mechanism in the electric servo loading device according to the present invention;
FIG. 7a is a schematic illustration of the structure of a swing arm in an electric servo loading device according to the present invention;
FIG. 7b is a left side view of FIG. 7 a;
Fig. 7c is a cross-sectional view A-A of fig. 7 a.
In the figure:
i-primary friction drum, II-primary main shaft center, III-primary test piece clamp, IV-primary friction force calibration mechanism,
V-primary load force sensor, VI-primary load center, VII-primary friction force sensor, VIII-load cylinder or cylinder;
1-bearing seat, 2-shaft sleeve, 3-swing arm supporting bearing, 4-main shaft,
5-Main shaft supporting bearings, 6-swing arms, 7-shaft end flanges, 8-friction drums,
9-Sliding blocks, 10-linear guide rails, 11-test piece hooks, 12-test piece clamps,
13-Friction force sensor, 14-first support, 15-load force sensor, 16-nut sleeve,
17-Rolling bearing screw rod, 18-driven toothed belt wheel, 19-toothed belt, 20-driving toothed belt wheel,
21-Servo motor, 22-loading force weight tray, 23-spherical hinge bearing, 24-stay wire,
25-Second support, 26-L-shaped lever, 27-friction weight tray, 28-third support,
29-Loading force calibration lever, 30-connecting plate, 31-proximity switch, 32-main shaft supporting table,
33-A transmission connection table; 34-nut sleeve anti-rotation guide post.
601-Swing arm pipe sleeve, 602-swing arm connecting frame and 603-swing arm vertical frame. 604-rail mount.
Detailed Description
For further explanation of the technical scheme of the invention, the specific embodiments of the invention are as follows in combination with the accompanying drawings of the specification:
The invention provides an electric servo loading device for a friction material chase testing machine, which consists of a main shaft mechanism, a loading force measuring mechanism, a loading force calibrating mechanism, a friction force measuring mechanism and a friction force calibrating mechanism.
As shown in fig. 3, the spindle mechanism is composed of a bearing block 1, a shaft sleeve 2, a spindle 4, a spindle support bearing 5, a swing arm 6, a swing arm support bearing 3, a shaft end flange 7, a friction drum 8 and a spindle support table 32. The bearing seat 1 is fixedly arranged on the upper surface of the main shaft supporting table 32 through bolts, one end of the shaft sleeve 2 is sleeved in the bearing seat 1, the outer wall of the shaft sleeve 2 is matched with the inner wall of the bearing seat 1, the main shaft 4 is sleeved on the inner side of the shaft sleeve 2, and two ends of the outer wall of the main shaft 4 are rotatably supported and arranged in the shaft sleeve 2 through a pair of main shaft supporting bearings 5; the swing arm sleeve at the top of the swing arm 6 is sleeved outside the other end of the shaft sleeve 2, and the inner wall of the swing arm sleeve is rotatably supported and installed on the outer wall of the shaft sleeve 2 through the swing arm supporting bearing 3; the friction drum 8 is coaxially mounted at the end of the main shaft 4 by means of a shaft end flange 7.
As shown in fig. 7a, 7b and 7c, the swing arm 6 is composed of a swing arm sleeve 601, a swing arm connecting frame 602, a swing arm stand 603 and a guide rail mounting seat 604. The axis of the swing arm pipe sleeve 601 is perpendicular to the central line of the swing arm connecting frame 602, the swing arm pipe sleeve 601 is welded and fixed at the top of the swing arm vertical frame 603, and the swing arm connecting frame 602 is perpendicular to the swing arm vertical frame 603 and is welded and fixed at a position above the swing arm vertical frame 603 close to the bottom of the swing arm pipe sleeve 601; symmetrical stepped holes are formed in two ends of the inner side of the swing arm pipe sleeve 601 and are used for being matched with the swing arm support bearing 3 for positioning, a connecting through hole is formed in the end face of the swing arm connecting frame 602, a connecting blind hole is formed in the side face of the swing arm connecting frame 602, the swing arm vertical frame 603 is supported by a square pipe, a connecting boss is welded on the side wall below the swing arm vertical frame 603, and the connecting through hole is formed in the boss; the guide rail mounting seat 604 is mounted on the side wall of the swing arm stand 603 along the length direction of the swing arm stand 603.
As shown in fig. 3 and 4, the loading force measuring mechanism is provided along the length direction of the swing arm 6, and is composed of a test piece clamp 12, a test piece hook 11, a slider 9, a linear guide rail 10, a loading force sensor 15, a spherical hinge bearing 23, a proximity switch 31, a nut sleeve 16, a rolling bearing screw 17, a transmission connection table 33, a nut sleeve anti-rotation guide post 34, a driven toothed belt wheel 18, a toothed belt 19, a driving toothed belt wheel 20 and a servo motor 21.
The test piece clamp 12 is fixed on the inner side of the friction drum 8, a test block with tested performance is arranged in the test piece clamp 12, the upper end of the test piece hook 11 is fixedly connected below the test piece clamp 12, the lower end of the test piece hook 11 is fixedly connected to the sliding block 9, the sliding block 9 is in matched sliding connection with the linear guide rail 10, the linear guide rail 10 is arranged along the length direction of the swing arm 6 and is fixedly connected in the guide rail mounting seat 604 on the swing arm 6, and the central lines (namely the loading force lines applied to the test piece) of the sliding block 9, the linear guide rail 10, the test piece hook 11 and the test piece clamp 12 are all intersected with the central line of the main shaft;
The upper end of the loading force sensor 15 is connected with the bottom of the test piece hook 11 through a spherical hinge bearing 23, the lower end of the loading force sensor 15 is connected with the top end of a nut sleeve 16 below through another spherical hinge bearing 23, the nut sleeve 16 is sleeved on the outer side of a rolling bearing screw 17, a nut is fixed on the inner side of the nut sleeve 16, and the nut is in threaded fit connection with the rolling bearing screw 17 to form a ball screw transmission pair; the nut sleeve anti-rotation guide post 34 is arranged on one side of the nut sleeve 16 in parallel and is fixed on the upper surface of the transmission connection table 33, an anti-rotation sleeve is fixedly connected to the outer wall of the nut sleeve 16 and sleeved on the outer surface of the nut sleeve anti-rotation guide post 34, and the nut sleeve anti-rotation guide post 34 and the nut sleeve 16 are axially arranged in parallel, so that the nut sleeve 16 cannot rotate axially, and the nut sleeve 16 only does axial linear motion under the rotation drive of the rolling bearing screw 17;
the proximity switch 31 is mounted on the side wall of the swing arm stand 603 and is matched with the maximum displacement position of the nut sleeve 16 moving upwards along the ball bearing screw 17, so that when the nut sleeve 16 moves to the highest position, the proximity switch 31 is triggered to limit the displacement amount of the nut sleeve 16 moving upwards;
The driving connection table 33 is positioned at the bottom of the swing arm 6, the swing arm 6 is fixedly connected with a side frame of the driving connection table 33 through a connection boss below the swing arm vertical frame 603, the bottom shaft end of the rolling bearing screw 17 is coaxially connected with a driven toothed belt wheel 18 arranged at one side below the driving connection table 33 in a driving way, the driving toothed belt wheel 20 is arranged at the other side below the driving connection table 33, the driving toothed belt wheel 20 is in driving connection with the driven toothed belt wheel 18 through a toothed belt 19, the driving toothed belt wheel 20 is coaxially arranged at the output end of the servo motor 21, and a shell of the servo motor 21 is fixedly arranged at the bottom of the driving connection table 33;
The center lines of the loading force sensor 15, the nut sleeve 16, the rolling bearing screw 17 and the driven gear pulley 18 (namely, the loading force lines applied to the upper parts) are intersected with the center line of the main shaft;
In the loading force measuring mechanism, when the servo motor 21 starts to work, rotary power is output through the servo motor 21 and is transmitted to the rolling bearing screw 17 through the driving toothed belt wheel 20, the toothed belt 19 and the driven toothed belt wheel 18 in sequence, under the rotary driving of the rolling bearing screw 17, the loading force sensor 15, the test piece hook 11 and the test piece clamp 12 move linearly downwards along with the nut sleeve 16 along the axial direction, the test piece is contacted with the friction drum 8, and the loading force sensor 15 measures the loading force (positive pressure) applied by the test piece to the friction drum 8. In the loading force measuring mechanism, the loading force driving end is driven by the servo motor 21, the transmission part is driven by the toothed belt transmission pair and the ball screw transmission pair, the transmission is accurate and stable, the loading force line is ensured to always pass through the central axis of the main shaft 4, namely to intersect with the central axis, and the accuracy of the measuring result is ensured.
As shown in fig. 5, the loading force calibration mechanism is composed of a connecting plate 30, a third support 28, a loading force calibration lever 29 and a loading force weight tray 22. The loading force calibration lever 29 is a linear lever, one end of the loading force calibration lever 29 is connected with the top of the test piece hook 11 through a connecting plate 30, the third support 28 is arranged on the upper surface of the main shaft supporting table 32, the middle part of the loading force calibration lever 29 is supported on the third support 28 to form a lever fulcrum, and the loading force weight disc 22 is hung at the other end of the loading force calibration lever 29.
In the loading force calibration mechanism, when the loading force sensor 15 is calibrated, the servo motor 21 is in a non-working state, the test block and the friction drum 8 are in a non-contact state, weights with certain mass are placed on the weight disc 22, the gravity of the weights sequentially acts on the loading force sensor 15 through the loading force weight disc 22, the loading force calibration lever 29, the third support 28, the connecting plate 30 and the test piece hook 11, the force loaded on the loading force sensor 15 is calculated through the gravity of the weights and the lever ratio, and the force measurement value of the loading force sensor 15 is adjusted to be the same as the actual loading force at the moment, so that the loading force calibration is completed.
As shown in fig. 6, the friction force measuring mechanism is horizontally arranged on the main shaft supporting table 32, and is composed of a first support 14, a spherical hinge bearing 23 and a friction force sensor 13. The first support 14 is horizontally and fixedly arranged on the upper surface of the spindle supporting table 32 at one radial side of the swing arm 6, the friction sensor 13 is horizontally arranged, one end of the friction sensor 13 is connected to the first support 14 through one spherical hinge bearing 23, and the other end of the friction sensor 13 is hinged to the corresponding end (right end in the figure) of the swing arm connecting frame 602 on the swing arm 6 through the other spherical hinge bearing 23.
In the above-mentioned friction force measuring mechanism, when the testing machine works, the main shaft 4 drives the friction drum 8 to be in a rotating state, the test block contacts with the inner side of the friction drum 8 through the loading force measuring mechanism and generates downward loading force (positive pressure) on the friction drum 8, the friction force in the horizontal direction is generated between the test block and the friction drum 8, the friction force is transmitted to the friction force sensor 13 through the swing arm connecting frame 602 and the spherical hinge bearing 23 on the swing arm 6, and the friction force sensor 13 measures the value of the friction force. Because the vector direction of the friction force and the friction force sensor 13 form a horizontal straight line (the lever structure in the original design is cancelled), the measurement error is extremely small, and the test result is more accurate.
As shown in fig. 6, the friction calibration mechanism is composed of a pull wire 24, a second support 25, an L-shaped lever 26 and a friction weight tray 27. One end of the pull wire 24 is hinged to a corresponding end (left end in the drawing) of a swing arm connecting frame 602 on the swing arm 6 through a spherical hinge bearing 23, the other end of the pull wire 24 is connected with the top end of the vertical side of the L-shaped lever 26, the second support 25 is horizontally and fixedly arranged on the upper surface of a main shaft supporting table 32 on the other side of the main shaft 5, the middle bending part of the L-shaped lever 26 is hinged to the second support 25, and the friction weight disc 26 is hung to the tail end of the horizontal side of the L-shaped lever 26.
In the above-mentioned friction calibration mechanism, when calibrating the friction sensor 13, one end of the pull wire 24 is hinged with the left end of the swing arm connecting frame 602 on the swing arm 6, a weight with a certain mass is placed on the weight disc 27, the gravity of the weight sequentially acts on the friction sensor 13 through the friction weight disc 27, the L-shaped lever 26, the second support 25, the pull wire 24, the ball hinge bearing 23, the swing arm connecting frame 602 on the swing arm 6 and the ball hinge bearing 23, and the force acting on the friction sensor 13 is calculated through the gravity of the weight and the lever ratio of the L-shaped lever 26, and the force measurement value of the friction sensor 13 is adjusted to be the same as the actual loading force at this time, thereby completing the friction calibration.
Claims (8)
1. The utility model provides a friction material chase testing machine is with electronic servo loading device, comprises main shaft mechanism, loading force measurement mechanism, loading force calibration mechanism, friction force measurement mechanism and friction force calibration mechanism, its characterized in that:
In the main shaft mechanism, a main shaft (4) is arranged on a main shaft supporting table (32), a swing arm (6) is coaxially and rotatably arranged outside one end of the main shaft (4) through a shaft sleeve (2), and a friction drum (8) is coaxially fixed on the end surface of the shaft sleeve (2);
The loading force measuring mechanism is formed by sequentially connecting a test piece clamp (12), a test piece hook (11), a guide mechanism, a loading force sensor (15), a ball screw transmission mechanism, a motor transmission mechanism and a servo motor (21) from top to bottom, and the central lines of the output ends of the test piece clamp (12), the test piece hook (11), the guide mechanism, the loading force sensor (15), the ball screw transmission mechanism and the motor transmission mechanism are intersected with the central line of the main shaft (4);
The loading force calibration mechanism is connected with the top of the test piece hook (11);
The friction force measuring mechanism and the friction force calibrating mechanism are respectively arranged on the main shaft supporting tables (32) at two sides of the main shaft (4) along horizontal collineation;
The main shaft mechanism consists of a bearing seat (1), a shaft sleeve (2), a main shaft (4), a main shaft supporting bearing (5), a swing arm (6), a swing arm supporting bearing (3), a shaft end flange (7), a friction drum (8) and a main shaft supporting table (32);
The bearing seat (1) is fixed on the main shaft supporting table (32), one end of the shaft sleeve (2) is sleeved in the bearing seat (1), two ends of the main shaft (4) are installed in the shaft sleeve (2) through the main shaft supporting bearing (5), the top of the swing arm (6) is sleeved at the other end of the shaft sleeve (2) through the swing arm supporting bearing (3), and the friction drum (8) is installed at the end part of the main shaft (4) through the shaft end flange (7);
the guide mechanism consists of a sliding block (9) and a linear guide rail (10), wherein the sliding block (9) is fixed at the lower end of the test piece hook (11), and the linear guide rail (10) is fixed on the swing arm (6) along the length direction of the swing arm (6).
2. The electric servo loading device for friction material chase testing machine as recited in claim 1, wherein:
The ball screw transmission mechanism consists of a nut sleeve (16), a rolling bearing screw (17), a nut sleeve anti-rotation component and a proximity switch (31);
The top end of the nut sleeve (16) is connected with the loading force sensor (15) through a spherical hinge bearing (23), the nut sleeve (16) is sleeved on the outer side of the rolling bearing screw (17) and is in threaded fit with the rolling bearing screw (17) through a nut fixed on the inner side of the nut sleeve to form a ball screw transmission pair, a nut sleeve anti-rotation component is arranged on a transmission connecting table (33) on the side surface of the nut sleeve (16), and the nut sleeve (16) is connected with the nut sleeve anti-rotation component, so that the nut sleeve (16) only makes axial linear movement under the rotary drive of the rolling bearing screw (17);
The proximity switch (31) is arranged on the side surface of the swing arm (6), and the height position corresponds to the highest position of the movement of the nut sleeve (16).
3. The electric servo loading device for friction material chase testing machine as recited in claim 2, wherein:
The nut sleeve anti-rotation component consists of a nut sleeve anti-rotation guide post (34) and an anti-rotation sleeve;
The nut sleeve anti-rotation guide post (34) is fixed on a transmission connection table (33) at one side of the nut sleeve (16) in parallel, the anti-rotation sleeve is fixedly connected to the outer wall of the nut sleeve (16), and the anti-rotation sleeve is sleeved on the outer surface of the nut sleeve anti-rotation guide post (34).
4. The electric servo loading device for friction material chase testing machine as recited in claim 1, wherein:
The motor transmission mechanism is arranged at the bottom of a transmission connection table (33) below the swing arm (6) and consists of a driven toothed belt wheel (18), a toothed belt (19) and a driving toothed belt wheel (20);
The driven toothed belt wheel (18) is used as the output end of the motor transmission mechanism and is coaxially connected with a rolling bearing screw (17) in the ball screw transmission mechanism in a transmission way, the driving toothed belt wheel (20) is in transmission connection with the driven toothed belt wheel (18) through a toothed belt (19), and the driving toothed belt wheel (20) is coaxially arranged at the output end of the servo motor (21).
5. The electric servo loading device for friction material chase testing machine as recited in claim 1, wherein:
the loading force calibration mechanism consists of a connecting plate (30), a third support (28), a loading force calibration lever (29) and a loading force weight disc (22);
One end of a loading force calibration lever (29) is connected with the top of the test piece hook (11) through a connecting plate (30), a third support (28) is arranged on the upper surface of a main shaft supporting table (32), the middle part of the loading force calibration lever (29) is supported on the third support (28), and a loading force weight disc (22) is hung at the other end of the loading force calibration lever (29).
6. The electric servo loading device for friction material chase testing machine as recited in claim 1, wherein:
The friction force measuring mechanism consists of a first support (14), a spherical hinge bearing (23) and a friction force sensor (13);
the first support (14) is fixed on a main shaft supporting table (32), one end of a friction sensor (13) which is horizontally arranged is connected to the first support (14) through a spherical hinge bearing (23), and the other end of the friction sensor (13) is hinged to the swing arm (6) through another spherical hinge bearing (23).
7. The electric servo loading device for friction material chase testing machine as recited in claim 1, wherein:
the friction force calibration mechanism is arranged on the device and consists of a stay wire (24), a second support (25), an L-shaped lever (26) and a friction force weight disc (27);
one end of a stay wire (24) is connected to the swing arm (6) through a spherical hinge bearing (23), the other end of the stay wire (24) is connected with one end of an L-shaped lever (26), a second support (25) is fixed on a main shaft supporting table (32), a middle bending point of the L-shaped lever (26) is hinged to the second support (25), and a friction weight disc (27) is hung to the other end of the L-shaped lever (26).
8. An electric servo loading device for friction material chase testing machine as recited in any one of claims 1, 2, 4, 6 and 7, wherein:
the swing arm (6) consists of a swing arm pipe sleeve (601), a swing arm connecting frame (602), a swing arm vertical frame (603) and a guide rail mounting seat (604);
the swing arm pipe sleeve (601) is fixed at the top of the swing arm stand (603), the swing arm connecting frame (602) is fixed above the swing arm stand (603) and is located at the bottom of the swing arm pipe sleeve (601), a connecting boss is arranged on the side wall below the swing arm stand (603), and the guide rail mounting seat (604) is fixed on the swing arm stand (603) along the length direction of the swing arm stand (603).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110160904B (en) * | 2019-06-24 | 2024-06-21 | 安徽理工大学 | Combined type friction and wear testing machine based on flexible hinge |
| CN110307933B (en) * | 2019-07-16 | 2024-03-29 | 西南交通大学 | Static calibration test bed for coupler force of railway vehicle |
| CN110672439B (en) * | 2019-10-22 | 2020-07-31 | 中国矿业大学(北京) | A swing arm mechanism and equipment for multiaspect excavation rock burst experiment |
| CN110726636B (en) * | 2019-12-02 | 2022-05-24 | 吉林大学 | Four-axis centering adjustment system and method for biaxial tensile testing machine |
| CN112275492B (en) * | 2020-10-22 | 2021-06-29 | 长江师范学院 | Automatic liquid spraying device for cylindrical workpiece and operation method thereof |
| CN113848062A (en) * | 2021-12-01 | 2021-12-28 | 三迪(常州)智能装备有限公司 | Oilless bearing friction force detection equipment |
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