CN111006881A - Novel pedal fatigue endurance test device - Google Patents
Novel pedal fatigue endurance test device Download PDFInfo
- Publication number
- CN111006881A CN111006881A CN201911384260.2A CN201911384260A CN111006881A CN 111006881 A CN111006881 A CN 111006881A CN 201911384260 A CN201911384260 A CN 201911384260A CN 111006881 A CN111006881 A CN 111006881A
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- pedal
- driving unit
- swing arm
- mounting rack
- clamp
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention provides a novel pedal fatigue endurance test device which comprises a driving unit mounting rack, a swing arm mounting rack and a pedal mounting rack, wherein the driving unit mounting rack is arranged on the driving unit mounting rack; the driving unit is arranged on the driving unit mounting rack, and the output end of the driving unit is connected with the swing arm; the swing arm mounting rack is rotatably connected with a swing arm of which the lower end can swing to one side close to or far away from the driving unit; the swing arm is vertically connected with the fixed rod through a first linear sliding block guide rail, and the connection form is a sliding pair; the fixed rod is connected with the force sensor; the force sensor is arranged on the pedal clamp, and the pedal clamp can clamp the pedal surface; and a pedal mounting seat for mounting a pedal is mounted on one side, close to the pedal clamp, of the pedal mounting rack. The novel pedal fatigue endurance test device can solve the problem of high cost caused by the fact that loading force needs to be guaranteed to be perpendicular to a pedal surface at any time in the movement process and the requirement of high power frequency on the performance of a driving unit is met.
Description
Technical Field
The invention belongs to the field of automobile brake tests, and particularly relates to a novel pedal fatigue endurance test device.
Background
The fatigue life test of the automobile brake pedal is generally carried out on a fatigue endurance test bed in the form of existence of brake pedal parts, the tail end of a driving unit is fixed in a spherical hinge mode, the output end of the driving unit is connected with a pedal face, and the driving unit drives the pedal to reciprocate. According to QC/T788-2018 automobile pedal performance requirements and a bench test method, the fatigue endurance test conditions are 5: the motion track is 85 +/-5% of the total stroke, the frequency is more than 0.7-3.0 Hz, the loading force is 0-500N, the force direction is vertical to the center of the pedal face, and the loading times are 50 ten thousand. However, at present, it is difficult for the test bench adopting the direct loading manner of the driving unit to completely satisfy the above 4 conditions. The pedal stroke is about 125mm, the 85% stroke is about 105mm, the frequency of the reciprocating stroke 210mm of the driving unit is 0.7Hz, and the general driving unit is difficult to meet the requirement of 50 ten thousand movements under the high-speed condition. Meanwhile, the motion trail of the pedal surface is circular motion, and the central normals of the pedal surface at any two moments are not intersected at one point, so that the loading force can not be ensured to be vertical to the pedal surface at any moment in a mode that the driving unit is directly loaded on the pedal surface. In the test process, because the motion state of the pedal cannot well meet the test conditions, the test result is often uncertain and disputed. To the above problems, pedal manufacturers and detection mechanisms urgently need a novel brake pedal fatigue endurance test device.
Disclosure of Invention
In view of the above, the present invention is directed to provide a novel pedal fatigue endurance test apparatus, which can solve the problem of high cost caused by the requirement of high power frequency on the performance of a driving unit and the requirement of ensuring that the loading force is perpendicular to a pedal surface at any time during the movement process, and can simultaneously meet the requirements of a pedal strength test and a pedal longitudinal stiffness test.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a novel pedal fatigue endurance test device comprises a driving unit mounting rack, a swing arm mounting rack and a pedal mounting rack;
the driving unit is arranged on the driving unit mounting rack, and the output end of the driving unit is connected with the swing arm;
the swing arm mounting rack is rotatably connected with a swing arm of which the lower end can swing to one side close to or far away from the driving unit; the swing arm is vertically connected with the fixed rod through a first linear sliding block guide rail, and the connection form is a sliding pair; the fixed rod is connected with the force sensor; the force sensor is arranged on the pedal clamp, and the pedal clamp can clamp the pedal surface;
a pedal mounting seat for mounting a pedal is mounted on one side, close to the pedal clamp, of the pedal mounting rack, and two angle adjusting pieces capable of sliding up and down are mounted on one side, far away from the pedal clamp, of the pedal mounting rack in parallel; a linear bearing is rotatably connected between the two angle adjusting pieces; one end of the linear bearing, which is close to the pedal clamp, is connected with a master cylinder simulation piece; the other end of the master cylinder simulation piece can be connected with a pedal; the main cylinder simulation piece is provided with a load force adjusting piece, and a pressure spring is arranged between the load force adjusting piece and the linear bearing.
Furthermore, the driving unit is connected with the driving unit mounting rack through a driving unit mounting connecting piece in a rotating pair mode.
Furthermore, the driving unit is connected with the swing arm through a driving rod, and the driving rod can move telescopically along with the driving unit.
Preferably, the mounting position of the driving rod and the swing arm connecting piece along the height direction of the swing arm is adjustable.
Furthermore, the driving rod and the swing arm are connected with a swing arm connecting piece through the driving rod, and the connecting form is a revolute pair.
Furthermore, the swing arm is connected with the swing arm mounting rack through a first rolling bearing, and the connection form is a revolute pair.
Furthermore, the driving unit, the driving rod, the swing arm, the first rolling bearing, the first linear slide block guide rail, the fixed rod and the pedal clamp form a four-bar linkage.
Further, the fixing rod is rigidly connected with the force sensor; the fixed rod is perpendicular to the pedal which is well clamped by the pedal clamp during the test.
Furthermore, the first line of slide block guide rail is fixedly arranged on one side of the swing arm far away from the driving unit, and the slide block of the first line of slide block guide rail is fixedly connected with the fixed rod.
Furthermore, two sets of second linear slide rail guide rails are arranged on one side, away from the pedal clamp, of the pedal mounting rack in parallel, and an angle adjusting piece is fixedly connected to a sliding block of each set of second linear slide rail guide rail.
Furthermore, each first angle adjusting piece is provided with a second rolling bearing; a linear bearing mounting seat is mounted on the inner ring of the second rolling bearing; the linear bearing is installed in the linear bearing installation seat.
Furthermore, the pressure spring is arranged on the load force adjusting piece in an interference fit mode, and the load force adjusting piece is arranged on the main cylinder simulating piece in a threaded connection mode.
Furthermore, a cylindrical rod-shaped object with a U-shaped groove and a thread at one end of the main cylinder simulation piece is integrally arranged in the linear bearing and can do reciprocating linear motion along the axis of the linear bearing.
Furthermore, the load force adjusting piece is a cube with an internal thread at the center, the side surfaces of the cube are respectively provided with a threaded hole, and each threaded hole is internally provided with a screw rod;
furthermore, the angle adjusting piece is a T-shaped structural piece, and a bearing hole for mounting the bearing is formed in the middle of the angle adjusting piece.
Furthermore, an angle sensor is arranged between the pedal mounting seat and the pedal arm of the pedal.
Further, the driving unit is one of an electric cylinder, an air cylinder and a hydraulic cylinder.
Further preferably, the drive unit is an electric cylinder.
Compared with the prior art, the novel pedal fatigue endurance test device has the following advantages:
(1) the structure is simple, the function is strong, and the test conditions of large stroke, high speed and vertical loading in the motion process can be simultaneously met by using a common driving unit;
(2) the device has strong universality, various models of pedal tests can be completed by replacing the pedal mounting seat, the compression amount of the compression spring is adjusted to meet the requirements of different loading forces, and the position of the driving rod is adjusted to meet the requirements of different loading frequencies;
(3) the collected data are accurate, the collected force value is always a force value vertical to the pedal, and the data of the angular displacement sensor can accurately reflect the stroke of the pedal through pedal size conversion;
(4) the control is accurate, a displacement control mode is adopted, and the requirement of loading force when the pressure spring reaches a specified position can be met accurately through adjustment of the pressure spring;
(5) the whole set of device is high in test efficiency, low in test cost, simple in structure and low in manufacturing cost, can be flexibly applied to different occasions, and greatly improves the efficiency and convenience of test work.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a perspective view of the novel pedal fatigue endurance testing apparatus according to an embodiment of the present invention at an angle;
FIG. 2 is a perspective view of another angle of the novel pedal fatigue endurance testing apparatus according to the embodiment of the present invention;
FIG. 3 is a perspective view of the novel pedal fatigue endurance testing apparatus according to the embodiment of the present invention at a third angle;
FIG. 4 is a perspective view of the novel pedal fatigue endurance testing apparatus according to the embodiment of the present invention, in a state of use, without a swing arm mounting stand and a pedal mounting stand;
FIG. 5 is an enlarged view of the relative position mounting structure of the pedal mount, pedal clamp, and force sensor of FIG. 1;
FIG. 6 is an enlarged view taken at A in FIG. 5;
FIG. 7 is a first clamp body of the pedal clamp;
FIG. 8 is a second clamp body of the pedal clamp;
FIG. 9 is a front view of the novel pedal fatigue endurance testing apparatus according to the embodiment of the present invention in a use state;
FIG. 10 is a view showing a state of use of the novel pedal fatigue endurance testing apparatus according to the embodiment of the present invention;
FIG. 11 is a left side view of the novel pedal fatigue endurance testing apparatus according to an embodiment of the present invention in a use state;
FIG. 12 is a perspective view of the master cylinder simulator;
FIG. 13 is a perspective view of the load force adjuster;
FIG. 14 is a side view of the load force adjuster;
FIG. 15 is a perspective view of the angle adjustment member;
FIG. 16 is a view showing the installation structure of the linear bearing, the linear bearing mounting seat and the connecting rod;
FIG. 17 is a front view of FIG. 16;
FIG. 18 is a swing arm perspective view;
FIG. 19 is a perspective view of a swing arm mounting stand;
FIG. 20 is a front view of the swing arm mounting stand;
FIG. 21 is a top view of the swing arm mounting stand;
fig. 22 is a side view of the swing arm mounting stand.
Description of reference numerals:
1-mounting a rack on a driving unit; 2-mounting a connecting piece on the driving unit; 3-a drive unit; 4-a driving rod; 5-swinging arm; 6-a first rolling bearing; 7-swing arm mounting rack; 8-bearing end cap; 9-connecting the driving rod with the swing arm; 10-a first linear slider guide; 11-a fixing bar; 12-a force sensor; 13-a pedal clamp; 1301-a first fixture body; 1302-a second gripper body; 14-an angle sensor; 15-pedal mount; 16-pedal mounting stand; 17-master cylinder simulation; 18-a load force adjuster; 19-a pressure spring; 20-a second linear slider guide; 21-an angle adjustment; 22-linear bearings; 23-a second rolling bearing; 24-linear bearing mount; 25-an internally threaded hole; 26-a threaded hole; 27-a bearing bore; 28-U-shaped slot; 29-a connecting rod; 30-a pedal arm; 31-tread surface; 32-pin shaft hole.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-6 and 9-12, a novel brake pedal fatigue endurance testing device mainly comprises: the device comprises a driving unit mounting rack 1, a driving unit mounting connecting piece 2, a driving unit 3, a driving rod 4, a swing arm 5, a first rolling bearing 6, a swing arm mounting rack 7, a bearing end cover 8, a driving rod and swing arm connecting piece 9, a first linear sliding block guide rail 10, a fixing rod 11, a force sensor 12, a pedal clamp 13, an angle sensor 14, a pedal mounting seat 15, a pedal mounting rack 16, a main cylinder simulator 17, a load force adjusting piece 18, a pressure spring 19, a second linear sliding block guide rail 20, an angle adjusting piece 21, a linear bearing 22, a second rolling bearing 23 and a linear bearing mounting seat 24.
The driving unit mounting rack 1 is provided with a driving unit 3, and the output end of the driving unit 3 is connected with a swing arm 5; the swing arm mounting rack 7 is rotatably connected with a swing arm 5 of which the lower end can swing to one side close to or far away from the driving unit 3; the swing arm 5 is vertically connected with a fixed rod 11 through a first linear slider guide rail 10 in a moving pair mode; the fixed rod 11 is vertically connected with the pedal through a pedal clamp 13 and is rigidly fixed, more specifically, the fixed rod is rigidly connected with a force sensor 12, the force sensor 12 is arranged on the pedal clamp 13, and the pedal clamp 13 can clamp the pedal surface; a pedal mounting seat 15 for mounting a pedal is mounted on one side, close to the pedal clamp 13, of the pedal mounting rack 16, and two angle adjusting pieces 21 capable of sliding up and down are mounted on one side, far away from the pedal clamp 13, of the pedal mounting rack 16 in parallel; a linear bearing 22 is rotatably connected between the two angle adjusting pieces 21; one end of the linear bearing 22 close to the pedal clamp 13 is connected with a master cylinder simulation piece 17; the other end of the master cylinder simulation part 17 can be connected with a pedal; the main cylinder simulation part 17 is provided with a load force adjusting part 18, a pressure spring 19 is arranged between the load force adjusting part 18 and a linear bearing 22, and the magnitude of the loading force when the pedal moves to a required position can be adjusted by adjusting the pressure spring 19 and the load force adjusting part 18.
More specifically, the driving unit 3 is connected with the driving unit mounting seat 3 through a driving unit mounting connecting piece 2 in a form of a revolute pair; the driving unit 3 is connected with the swing arm 5 through a driving rod 4, and the driving rod 4 can move telescopically along with the driving unit 3; the driving rod 4 and the swing arm 5 are connected with a swing arm connecting piece 9 through the driving rod, and the connecting form is a revolute pair; the swing arm 5 is connected with a swing arm mounting rack 7 through a first rolling bearing 6, and the connection form is a revolute pair. The driving unit 3, the driving rod 4, the swing arm 5, the rolling bearing 6, the linear slider guide rail 10, the fixed rod 11 and the pedal (pedal fixture 13 when the pedal is not installed) form a four-bar linkage mechanism, because the fixed end of the swing arm 5 is a rolling pair which takes a pedal rotating shaft as a circle center to do circular motion, and the force generated by the moving pair of the first linear slider guide rail 10 is decomposed, when the driving rod 4 makes telescopic swinging motion along with the driving unit 3, the force transmitted to the pedal (the force transmitted to the pedal fixture 13 when the pedal is not installed) is always perpendicular to the pedal surface along the direction of the fixed rod 11, and the pedal (the force transmitted to the pedal fixture 13 when the pedal is not installed) realizes circular motion under the driving of the driving unit 3. An alternative swing arm mounting stage 7 configuration is shown in fig. 10-22.
As an alternative embodiment of the present invention, the mounting position of the driving lever and the swing arm connecting member 9 in the height direction of the swing arm is adjustable. Specifically, in an alternative embodiment, a plurality of mounting holes are formed in the side of the swing arm 5 close to the driving unit 3 (see fig. 18 for a swing arm structure), and then the driving rod and the swing arm connecting piece 9 are detachably mounted on the swing arm 5 through bolts. Thus, by adjusting the position of the driving rod and the swing arm connecting piece 9 along the swing arm 5, the circular motion of driving the pedal with the small stroke of the driving unit to move along the large stroke can be realized.
As an alternative embodiment of the present invention, the first string sliding block guiding rail 10 is fixedly installed on the side of the swing arm 5 far away from the driving unit 3, and the sliding block of the first string sliding block guiding rail 10 is fixedly connected with the fixing rod 11.
As an alternative embodiment of the present invention, two sets of second linear sliding rail guide rails 20 are arranged in parallel on the side of the pedal mounting rack 16 away from the pedal fixture 13, and an angle adjusting member 21 is fixedly connected to a slide block of each set of second linear sliding rail guide rail 20. Each first angle adjuster 21 is provided with a second rolling bearing 23; a linear bearing mounting seat 24 is mounted on the inner ring of the second rolling bearing 23; the linear bearing 22 is mounted in the linear bearing mount 24. Referring to fig. 16 and 17, the linear bearing mount 24 is provided with a through hole, the linear bearing 22 is mounted in the through hole, the linear bearing 22 is a flanged linear bearing, the flange portion of the flanged linear bearing is located outside one side of the linear bearing mount 24 away from the pedal clamp body 13, in addition, in order to mount the second rolling bearing 23 and fix the second rolling bearing 23 with the angle adjusting member 21, a connecting rod 29 is fixedly connected to each of two opposite sides of the linear bearing mount 24, when in use, the two second rolling bearings 23 are respectively sleeved on the two connecting rods, and then the second rolling bearings 23 and the connecting rod 29 are mounted on the angle adjusting member 21 (specifically, the second rolling bearings 23 are mounted in the bearing holes 27).
As an alternative embodiment of the present invention, the compression spring 19 is mounted to the load force adjuster 18 by interference fit, and the load force adjuster 18 is mounted to the master cylinder simulator 17 by screw coupling.
As an alternative embodiment of the present invention, as shown in fig. 12, the master cylinder simulator 17 is a cylindrical rod having a screw thread with a U-shaped groove 28 at one end. The main cylinder simulation piece 17 is integrally arranged in a linear bearing 22 (one end of the main cylinder simulation piece 17 far away from the pedal clamp 13 in the figure 1 extends out of the linear bearing 22) and can do reciprocating linear motion along the axis of the linear bearing 22; the end of the U-shaped groove is provided with a mounting hole, and is connected with the pedal arm through a pin shaft when in use; the middle thread is matched with the internal thread of the load force adjusting piece 18, the load force adjusting piece 18 can realize position adjustment in the axis direction through a thread structure, and the pressure spring 19 is enabled to present different compression degrees, so that different requirements of main cylinder supporting force are provided for pedals of different models.
As an alternative embodiment of the present invention, as shown in fig. 13 and 14, the load force adjuster 18 is a square body with a central threaded hole 25, one threaded hole 26 is formed in each side surface, and 4 threaded holes 26 are provided to receive screws to increase the moment of the load force adjuster 18, thereby facilitating the position adjustment of the load force adjuster 18 in the axial direction of the master cylinder simulator 17.
As an alternative embodiment of the present invention, as shown in fig. 15, the angle adjusting member 21 is a T-shaped structural member, and is connected to the sliding block of the second linear guideway 20 through four holes at the bottom, and a bearing hole 27 for mounting a bearing is provided in the middle. The whole body can move up and down along with the slide block of the second linear slide rail guide rail 20, so that the main cylinder simulation part 17 connected with the pedal can form different included angles with the pedal arm, and the pedal simulator is suitable for pedals of different models.
As an alternative embodiment of the present invention, the driving unit 3 may select one of electric cylinder, air cylinder, and hydraulic cylinder; most preferred is an electric cylinder.
As an alternative embodiment of the present invention, as shown in fig. 7 and 8, the pedal clamp 13 is composed of a first clamp body 1301 and a second clamp body 1302 which are oppositely arranged, wherein the first clamp body 1301 is two vertical plates which are independently arranged and provided with threaded holes at two ends, the second clamp body 1302 is a structure in which four corners are provided with threaded holes, two opposite sides are recessed, and the recessed part is provided with a mounting hole.
A pedal structure suitable for use with the present invention, as shown in fig. 5 and 6, includes the pedal mounting seat 15, the pedal arm 30, and the pedal surface 31, the pedal arm 30 and the pedal mounting seat 15 are pivotally connected by a pin shaft, the pedal arm 30 is provided with a pin shaft hole 32, and the pedal arm 30 and the master cylinder simulator 17 can be connected by a pin shaft through the pin shaft hole 32. During test installation, the pedal surface 31 is placed between the first clamp body 1301 and the second clamp body 1302, the first clamp body 1301, the pedal surface 31 and the second clamp body 1302 are fixedly connected through bolts, and clamping and fixing installation of the pedal clamp 13 on the clamped pedal surface 31 is achieved. In addition, an angle sensor 14 is installed between the pedal mounting seat 15 and the pedal arm 30 of the pedal, specifically, one end of the angle sensor 14 is connected to a screw rod of the pedal mounting seat 15, one end of the angle sensor is connected to a pin shaft installed in the pin shaft hole 32, and the other end of the angle sensor is fixed and rotates.
The installation process of the whole novel brake pedal fatigue endurance test device can be as follows:
mounting of the tread portion: the pedal is fixed with the pedal mounting seat 15 through a bolt, the pedal mounting seat 15 is fixed with the pedal mounting rack 16 through a bolt, two sets of second linear slider guide rails 20 are fixed on the left side and the right side of the back of the pedal mounting rack 16 through bolts, the angle adjusting piece 21 is fixed on sliders in the second linear slider guide rails 20 through bolts, the outer rings of the two second rolling bearings 23 are mounted on the angle adjusting piece 21 through interference fit, the linear bearing mounting seat 24 is mounted on the inner ring of the rolling bearing 23 through interference fit, the linear bearing 22 is fixed on the linear bearing mounting seat 24 through bolts, the pressure spring 19 is mounted on the load force adjusting piece 18 through interference fit, the load force adjusting piece 18 is mounted on the master cylinder simulation piece 17 through a threaded connection mode, one end of the master cylinder simulation piece 17 is connected with the pedal through a pin.
Installation of the swing arm part: the outer ring of a first rolling bearing 6 is installed on a swing arm installation rack 7 in a clearance fit mode, a bearing end cover 8 is fixed on the swing arm installation rack 7 through bolts, a swing arm 5 is installed on the inner ring of the rolling bearing 6 in an interference fit mode, a first linear sliding block guide rail 10 is fixed on one side of the swing arm 5 through bolts, a driving rod and a swing arm connecting piece 9 are fixed on the other side of the swing arm 5 through bolts, one end of a fixing rod 11 is fixed on a sliding block of the first linear sliding block guide rail 10 through bolts, the other end of the fixing rod is fixed on a force sensor 12 through bolts, the force sensor 12 is fixed on a pedal clamp 13 through bolts, the pedal clamp 13 clamps a pedal surface.
Mounting of the drive unit part: the driving unit 3 is installed on the driving unit installing connecting piece 2 through a pin shaft, the driving unit installing connecting piece 2 is fixed on the driving unit installing rack 1 through a bolt, one end of the driving rod 4 is installed on the driving unit 3 in a threaded mode, and the other end of the driving rod is connected with the swing arm connecting piece 9 through the pin shaft and the driving rod.
So far, the test device is completely installed.
When the device is used, the load force adjusting piece 18 is adjusted to the maximum position, the pressure spring 19 is in a completely loose state, the driving unit 3 extends out for a certain displacement (for example, 30mm), the position of the driving rod and the swing arm connecting piece 9 along the direction of the swing arm 5 and the mutual position relation between the driving unit mounting rack 1 and the swing arm mounting rack 7 as well as between the swing arm mounting rack 7 and the pedal mounting rack 16 are adjusted, so that the pedal moves to a required position (for example, 85% of full stroke) from an initial state, the load force adjusting piece 18 is adjusted to enable one end of the pressure spring 19 to be in contact with the linear bearing mounting seat 24, the load force adjusting piece 18 is continuously adjusted and adjusted to enable the pressure spring 19 to be compressed according to a force sensor feedback value until a force value reaches a required value (for example, 500N), the driving. The test can be started. The force and displacement values can be collected in real time in the test process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a novel footboard fatigue endurance test device which characterized in that: comprises a driving unit mounting rack (1), a swing arm mounting rack (7) and a pedal mounting rack (16);
the driving unit (3) is installed on the driving unit installation rack (1), and the output end of the driving unit (3) is connected with the swing arm (5);
the swing arm mounting rack (7) is rotatably connected with a swing arm (5) of which the lower end can swing to one side close to and far away from the driving unit (3); the swing arm (5) is vertically connected with a fixed rod (11) through a first linear sliding block guide rail (10) in a moving pair mode; the fixed rod is connected with a force sensor (12); the force sensor (12) is arranged on the pedal clamp (13), and the pedal clamp (13) can clamp the pedal surface;
a pedal mounting seat (15) for mounting a pedal is mounted on one side, close to the pedal clamp (13), of the pedal mounting rack (16), and two angle adjusting pieces (21) capable of sliding up and down are mounted on one side, far away from the pedal clamp (13), of the pedal mounting rack (16) in parallel; a linear bearing (22) is rotatably connected between the two angle adjusting pieces (21); one end of the linear bearing (22) close to the pedal clamp (13) is connected with a master cylinder simulation piece (17); the other end of the master cylinder simulation piece (17) can be connected with a pedal; the master cylinder simulation piece (17) is provided with a load force adjusting piece (18), and a pressure spring (19) is arranged between the load force adjusting piece (18) and the linear bearing (22).
2. The novel pedal fatigue endurance testing apparatus of claim 1, wherein: the driving unit (3) is connected with the driving unit mounting rack (1) through a driving unit mounting connecting piece (2) in a form of a revolute pair.
3. The novel pedal fatigue endurance testing apparatus according to claim 1 or 2, wherein: the driving unit (3) is connected with the swing arm (5) through the driving rod (4), and the driving rod (4) can move telescopically along with the driving unit (3).
4. The novel pedal fatigue endurance testing apparatus of claim 3, wherein: the driving rod (4) and the swing arm (5) are connected with a swing arm connecting piece (9) through the driving rod, and the connecting form is a revolute pair;
preferably, the installation position of the driving rod and the swing arm connecting piece (9) along the height direction of the swing arm (5) is adjustable.
5. The novel pedal fatigue endurance testing apparatus of claim 3, wherein: the swing arm (5) is connected with a swing arm mounting rack (7) through a first rolling bearing (6) in a form of a revolute pair.
6. The novel pedal fatigue endurance testing apparatus of claim 5, wherein: the four-bar mechanism comprises a driving unit (3), a driving rod (4), a swing arm (5), a first rolling bearing (6), a first linear slider guide rail (10), a fixed rod (11) and a pedal clamp (13).
7. The novel pedal fatigue endurance testing apparatus according to claim 1 or 2, wherein: the fixing rod (11) is rigidly connected with the force sensor (12); the fixing rod (11) is perpendicular to the pedal which is well clamped by the pedal clamp (13) during the test.
8. The novel pedal fatigue endurance testing apparatus according to claim 1 or 2, wherein: the first line of slide block guide rail (10) is fixedly arranged on one side of the swing arm (5) far away from the driving unit (3), and a slide block of the first line of slide block guide rail (10) is fixedly connected with the fixing rod (11).
9. The novel pedal fatigue endurance testing apparatus of claim 1, wherein: two sets of second linear slide rail guide rails (20) are arranged on one side, away from the pedal clamp (13), of the pedal mounting rack (16) in parallel, and an angle adjusting piece (21) is fixedly connected to a sliding block of each set of second linear slide rail guide rail (20);
and/or a second rolling bearing (23) is mounted on each first angle adjusting piece (21); a linear bearing mounting seat (24) is mounted on the inner ring of the second rolling bearing (23); the linear bearing (22) is arranged in the linear bearing mounting seat (24);
and/or the pressure spring (19) is arranged on the load force adjusting piece (18) in an interference fit mode, and the load force adjusting piece (18) is arranged on the master cylinder simulating piece (17) in a threaded connection mode.
10. The novel pedal fatigue endurance testing apparatus according to claim 1 or 9, wherein: one end of the master cylinder simulation piece (17) is provided with a cylindrical rod-shaped object with a U-shaped groove and threads, the cylindrical rod-shaped object is integrally arranged in the linear bearing (22), and can do reciprocating linear motion along the axis of the linear bearing (22);
and/or the load force adjusting piece (18) is a cube with a central internal threaded hole, the side surfaces of the cube are respectively provided with a threaded hole, and each threaded hole is internally provided with a screw rod;
and/or the angle adjusting piece (21) is a T-shaped structural piece, and a bearing hole for bearing installation is arranged in the middle of the angle adjusting piece;
preferably, an angle sensor (14) is arranged between the pedal mounting seat (15) and a pedal arm of the pedal;
preferably, the driving unit (3) is one of an electric cylinder, an air cylinder and a hydraulic cylinder;
more preferably, the drive unit (3) is an electric cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384260.2A CN111006881A (en) | 2019-12-28 | 2019-12-28 | Novel pedal fatigue endurance test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384260.2A CN111006881A (en) | 2019-12-28 | 2019-12-28 | Novel pedal fatigue endurance test device |
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| CN111006881A true CN111006881A (en) | 2020-04-14 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129515A (en) * | 2020-11-20 | 2020-12-25 | 江西江铃集团深铃汽车零部件有限公司 | Vacuum booster's endurance test platform |
| CN112362508A (en) * | 2020-09-30 | 2021-02-12 | 中汽研（天津）汽车工程研究院有限公司 | Low-cycle strain fatigue control method for thin plate |
| CN112697450A (en) * | 2020-11-11 | 2021-04-23 | 中汽研汽车检验中心（天津）有限公司 | System and method for testing reliability of automobile brake pedal |
| CN112729858A (en) * | 2020-11-23 | 2021-04-30 | 协展(福建)机械工业有限公司 | Pedal actuating power efficiency testing system and testing method thereof |
| CN114199586A (en) * | 2021-11-30 | 2022-03-18 | 东风商用车有限公司 | Special foot model for trample endurance test |
| CN117419916A (en) * | 2023-11-12 | 2024-01-19 | 山东宝德龙健身器材有限公司 | Stability and fatigue test device for fitness equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112362508A (en) * | 2020-09-30 | 2021-02-12 | 中汽研（天津）汽车工程研究院有限公司 | Low-cycle strain fatigue control method for thin plate |
| CN112697450A (en) * | 2020-11-11 | 2021-04-23 | 中汽研汽车检验中心（天津）有限公司 | System and method for testing reliability of automobile brake pedal |
| CN112129515A (en) * | 2020-11-20 | 2020-12-25 | 江西江铃集团深铃汽车零部件有限公司 | Vacuum booster's endurance test platform |
| CN112729858A (en) * | 2020-11-23 | 2021-04-30 | 协展(福建)机械工业有限公司 | Pedal actuating power efficiency testing system and testing method thereof |
| CN112729858B (en) * | 2020-11-23 | 2023-07-11 | 协展(福建)机械工业有限公司 | Pedal actuating force efficiency test system and test method thereof |
| CN114199586A (en) * | 2021-11-30 | 2022-03-18 | 东风商用车有限公司 | Special foot model for trample endurance test |
| CN117419916A (en) * | 2023-11-12 | 2024-01-19 | 山东宝德龙健身器材有限公司 | Stability and fatigue test device for fitness equipment |
| CN117419916B (en) * | 2023-11-12 | 2024-03-19 | 山东宝德龙健身器材有限公司 | Stability and fatigue test device for fitness equipment |
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