A new type of pedal fatigue durability test device

Abstract

The present invention provides a novel pedal fatigue and durability test device, comprising a drive unit mounting stand, a swing arm mounting stand and a pedal mounting stand; a drive unit is mounted on the drive unit mounting stand, and the output end of the drive unit is connected to a swing arm; a swing arm is rotatably connected to the swing arm mounting stand, and the lower end of the swing arm can swing toward and away from the drive unit; the swing arm is vertically connected to a fixed rod through a first linear slider guide, and the connection form is a moving pair; the fixed rod is connected to a force sensor; the force sensor is mounted on a pedal clamp, and the pedal clamp can support the pedal surface; a pedal mounting seat for mounting the pedal is mounted on the pedal mounting stand close to the pedal clamp. The novel pedal fatigue and durability test device described in the present invention can solve the problem that the loading force needs to be kept perpendicular to the pedal surface at all times during movement, and the high cost caused by the high power frequency requirements on the performance of the drive unit.

Description

Technical Field

[0001] The invention belongs to the field of automobile brake testing, and in particular relates to a novel pedal fatigue durability testing device. Background Art

[0002] The fatigue life test of automobile brake pedals is generally carried out on a fatigue durability test bench in the form of brake pedal components. The tail end of the drive unit is fixed by a ball joint, the output end is connected to the pedal surface, and the drive unit drives the pedal to reciprocate. According to QC / T788-2018 Automobile Pedal Performance Requirements and Bench Test Methods, there are 5 fatigue durability test conditions: the motion trajectory is 85±5% of the full stroke, the frequency is greater than 0.7~3.0Hz, the loading force is 0~500N, the force direction is perpendicular to the center of the pedal surface, and the number of loading times is 500,000 times. However, at present, it is difficult for the test bench using this method of direct loading of the drive unit to fully meet the above 4 conditions. The pedal stroke is about 125mm, the 85% stroke is about 105mm, and the frequency of the reciprocating motion stroke of the drive unit is 210mm at 0.7Hz. It is difficult for a general drive unit to meet the requirement of 500,000 times under this high-speed condition. At the same time, the motion trajectory of the pedal surface is a circular motion, and the normal lines of the center of the pedal surface at any two moments do not intersect at one point. Therefore, the form of directly loading the drive unit on the pedal surface cannot ensure that the loading force is always perpendicular to the pedal surface. During the test, since the pedal motion state cannot meet the test conditions well, the test results are often uncertain and controversial. In response to the above problems, pedal manufacturers and testing agencies are in urgent need of a new brake pedal fatigue durability test device. Summary of the invention

[0003] In view of this, the present invention aims to propose a novel pedal fatigue endurance testing device, which can solve the problem that the loading force needs to be kept perpendicular to the pedal surface at all times during movement and the high cost caused by the high power frequency requirements on the performance of the drive unit, and can also meet the needs of pedal strength test and pedal longitudinal stiffness test at the same time, has strong versatility, adjustable force value and stroke frequency, real-time monitoring of force and displacement data, high test efficiency, low test cost, simple structure and low manufacturing cost.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A novel pedal fatigue endurance test device comprises a drive unit mounting stand, a swing arm mounting stand and a pedal mounting stand;

[0006] The drive unit mounting stand is provided with a drive unit, and an output end of the drive unit is connected to a swing arm;

[0007] The swing arm mounting stand is rotatably connected to a swing arm, the lower end of which can swing toward and away from the driving unit; the swing arm is vertically connected to a fixed rod through a first linear slider guide rail, and the connection form is a moving pair; the fixed rod is connected to a force sensor; the force sensor is installed on a pedal clamp, and the pedal clamp can support the pedal surface;

[0008] A pedal mounting seat for mounting the pedal is installed on the side of the pedal mounting platform close to the pedal clamp, and two angle adjustment parts that can slide up and down are installed in parallel on the side of the pedal mounting platform away from the pedal clamp; a linear bearing is rotatably connected between the two angle adjustment parts; one end of the linear bearing close to the pedal clamp is connected to the master cylinder simulation part; the other end of the master cylinder simulation part can be connected to the pedal; a load force adjustment part is provided on the master cylinder simulation part, and a compression spring is installed between the load force adjustment part and the linear bearing.

[0009] Furthermore, the drive unit and the drive unit mounting stand are connected via a drive unit mounting connector, and the connection form is a revolute pair.

[0010] Furthermore, the driving unit and the swing arm are connected via an active rod, and the active rod can perform telescopic movement along with the driving unit.

[0011] Preferably, the installation position of the active rod and the swing arm connecting piece along the swing arm height direction is adjustable.

[0012] Furthermore, the active rod and the swing arm are connected via an active rod and swing arm connector, and the connection form is a revolute pair.

[0013] Furthermore, the swing arm and the swing arm mounting frame are connected via a first rolling bearing, and the connection form is a revolute pair.

[0014] Furthermore, the driving unit, the active rod, the swing arm, the first rolling bearing, the first linear slider guide, the fixed rod and the pedal clamp form a four-bar linkage.

[0015] Furthermore, the fixing rod is rigidly connected to the force sensor; the fixing rod is vertically arranged to the pedal supported by the pedal clamp during the test.

[0016] Furthermore, the first linear slider guide rail is fixedly installed on a side of the swing arm away from the driving unit, and a slider of the first linear slider guide rail is fixedly connected to a fixing rod.

[0017] Furthermore, two sets of second linear slide rails are provided in parallel on the side of the pedal mounting frame away from the pedal clamp, and an angle adjustment piece is fixedly connected to the slider of each set of second linear slide rails.

[0018] Furthermore, each first angle adjustment member is mounted with a second rolling bearing; the inner ring of the second rolling bearing is mounted with a linear bearing mounting seat; and the linear bearing is mounted in the linear bearing mounting seat.

[0019] Furthermore, the compression spring is installed on the load force adjusting member through interference fit, and the load force adjusting member is installed on the master cylinder simulation member through threaded connection.

[0020] Furthermore, the master cylinder simulation member is a threaded cylindrical rod with a U-shaped groove at one end, which is installed as a whole in a linear bearing and can perform reciprocating linear motion along the axis of the linear bearing.

[0021] Furthermore, the load force adjustment member is a cube with an internal thread in the center, and each side has a threaded hole, and a screw is installed in each threaded hole;

[0022] Furthermore, the angle adjustment member is a T-shaped structural member, and a bearing hole for bearing installation is provided in the middle.

[0023] Furthermore, an angle sensor is installed between the pedal mounting seat and the pedal arm of the pedal.

[0024] Furthermore, the driving unit is one of an electric cylinder, a pneumatic cylinder and a hydraulic cylinder.

[0025] Further preferably, the driving unit is an electric cylinder.

[0026] Compared with the prior art, the novel pedal fatigue durability test device described in the present invention has the following advantages:

[0027] (1) Simple structure and powerful functions. The general drive unit can simultaneously meet the test conditions of large stroke, high speed and vertical loading during movement;

[0028] (2) It has strong versatility. By replacing the pedal mounting seat, various types of pedal tests can be completed. The compression amount of the compression spring can be adjusted to meet the requirements of different loading forces, and the position of the active rod can be adjusted to meet the requirements of different loading frequencies.

[0029] (3) The collected data is accurate. The collected force value is always perpendicular to the pedal. The data of the angle displacement sensor can accurately reflect the pedal stroke by converting the pedal size.

[0030] (4) Precise control, using displacement control mode, the loading force requirements when reaching the specified position can be accurately met by adjusting the compression spring;

[0031] (5) The whole set of equipment has high test efficiency, low test cost, simple structure, low manufacturing cost, and can be flexibly applied to different occasions, which greatly increases the efficiency and convenience of testing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 A three-dimensional diagram of a novel pedal fatigue and durability testing device according to an embodiment of the present invention in a use state at one angle;

[0034] Figure 2 A three-dimensional diagram of the use state of the novel pedal fatigue and durability testing device according to an embodiment of the present invention from another angle;

[0035] Figure 3 A three-dimensional diagram of the use state of the novel pedal fatigue and durability testing device according to an embodiment of the present invention from a third angle;

[0036] Figure 4 It is a stereoscopic diagram of the novel pedal fatigue and endurance test device according to an embodiment of the present invention in a use state without the swing arm mounting stand and the pedal mounting stand;

[0037] Figure 5 for Figure 1 An enlarged view of the relative position installation structure of the middle pedal mounting seat, pedal, pedal fixture, and force sensor;

[0038] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0039] Figure 7 A first clamp body in the pedal clamp;

[0040] Figure 8 A second clamp body in the pedal clamp;

[0041] Fig. 9 It is a front view of the new pedal fatigue and durability testing device in use according to an embodiment of the present invention;

[0042] Fig.10 It is a schematic diagram of the new pedal fatigue endurance test device in use according to an embodiment of the present invention;

[0043] Fig.11 It is a left view of the new pedal fatigue endurance test device in the embodiment of the present invention in use;

[0044] Fig.12 A three-dimensional diagram of a master cylinder simulation;

[0045] Fig.13 is a three-dimensional diagram of a load force adjustment member;

[0046] Fig.14 is a side view of a load force adjustment member;

[0047] Fig.15 is a three-dimensional diagram of an angle adjustment member;

[0048] Fig.16 This is the installation structure diagram of the linear bearing, linear bearing mounting seat, and connecting rod;

[0049] Fig.17 for Fig.16 The main view;

[0050] Fig.18 It is a three-dimensional diagram of the swing arm;

[0051] Fig.19 A perspective view of the mounting bracket for the swing arm;

[0052] Fig. 20 Front view of the mounting bracket for the swing arm;

[0053] Fig.21 A top view of the mounting bracket for the swing arm;

[0054] Fig. 22 Side view of the mounting bracket for the swing arm.

[0055] Description of reference numerals:

[0056] 1-drive unit mounting stand; 2-drive unit mounting connector; 3-drive unit; 4-active rod; 5-swing arm; 6-first rolling bearing; 7-swing arm mounting stand; 8-bearing end cover; 9-active rod and swing arm connector; 10-first linear slider guide; 11-fixed rod; 12-force sensor; 13-pedal clamp; 1301-first clamp body; 1302-second clamp body; 14-angle sensor; 15-pedal mounting seat; 16-pedal mounting stand; 17-master cylinder simulation part; 18-load force adjustment part; 19-compression spring; 20-second linear slider guide; 21-angle adjustment part; 22-linear bearing; 23-second rolling bearing; 24-linear bearing mounting seat; 25-inner threaded hole; 26-threaded hole; 27-bearing hole; 28-U-shaped groove; 29-connecting rod; 30-pedal arm; 31-pedal surface; 32-pin shaft hole. DETAILED DESCRIPTION

[0057] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0060] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0061] like Figure 1-6 , Figure 9-12 As shown, a novel brake pedal fatigue endurance test device mainly includes: a drive unit mounting stand 1, a drive unit mounting connector 2, a drive unit 3, an active rod 4, a swing arm 5, a first rolling bearing 6, a swing arm mounting stand 7, a bearing end cover 8, an active rod and swing arm connector 9, a first linear slider guide 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 stand 16, a master cylinder simulation member 17, a load force adjustment member 18, a compression spring 19, a second linear slider guide 20, an angle adjustment member 21, a linear bearing 22, a second rolling bearing 23 and a linear bearing mounting seat 24.

[0062] The drive unit mounting stand 1 is provided with a drive unit 3, and the output end of the drive unit 3 is connected to a swing arm 5; the swing arm mounting stand 7 is rotatably connected with a swing arm 5, the lower end of which can swing toward and away from the drive unit 3; the swing arm 5 is vertically connected to a fixed rod 11 through a first linear slider guide 10, and the connection form is a moving pair; the fixed rod 11 is vertically connected to the pedal through a pedal clamp 13, and is rigidly fixed. More specifically, the fixed rod is rigidly connected to a force sensor 12, and the force sensor 12 is mounted on the pedal clamp 13, and the pedal clamp 13 can support the pedal surface; the pedal mounting stand 16 is close to the pedal clamp 1 A pedal mounting seat 15 for mounting a pedal is installed on one side, and two angle adjustment members 21 that can slide up and down are installed in parallel on the pedal mounting stand 16 away from the pedal clamp 13; a linear bearing 22 is rotatably connected between the two angle adjustment members 21; the linear bearing 22 is connected to a master cylinder simulation member 17 at one end close to the pedal clamp 13; the other end of the master cylinder simulation member 17 can be connected to the pedal; a load force adjustment member 18 is provided on the master cylinder simulation member 17, and a compression spring 19 is installed between the load force adjustment member 18 and the linear bearing 22, and the size of the loading force when the pedal moves to the required position can be adjusted by adjusting the compression spring 19 and the load force adjustment member 18.

[0063] More specifically, the drive unit 3 is connected to the drive unit mounting seat 3 through the drive unit mounting connector 2, and the connection form is a revolving pair; the drive unit 3 and the swing arm 5 are connected through the active rod 4, and the active rod 4 can telescope with the drive unit 3; the active rod 4 and the swing arm 5 are connected through the active rod and the swing arm connector 9, and the connection form is a revolving pair; the swing arm 5 is connected to the swing arm mounting stand 7 through the first rolling bearing 6, and the connection form is a revolving pair. The driving unit 3, the active rod 4, the swing arm 5, the rolling bearing 6, the linear slider guide 10, the fixed rod 11 and the pedal (i.e., the pedal fixture 13 when the pedal is not installed) form a four-bar linkage. Since the fixed end of the swing arm 5 is a rolling pair that performs circular motion with the pedal rotation axis as the center, and the force decomposition effect generated by the moving pair of the first linear slider guide 10, when the active rod 4 performs telescopic and swinging motion with the driving unit 3, the force transmitted to the pedal (i.e., the force transmitted to the pedal fixture 13 when the pedal is not installed) is always a force perpendicular to the pedal surface along the direction of the fixed rod 11, and the pedal (i.e., the force transmitted to the pedal fixture 13 when the pedal is not installed) realizes circular motion driven by the driving unit 3. The structure of an optional swing arm mounting stand 7 is shown in FIG. Figure 10-22 .

[0064] As an optional embodiment of the present invention, the installation position of the active rod and the swing arm connecting member 9 along the swing arm height direction can be adjusted. Specifically, an optional embodiment is to set a plurality of installation holes on the side of the swing arm 5 close to the drive unit 3 (see the swing arm structure). Fig.18), and then the active rod and the swing arm connecting member 9 are detachably mounted on the swing arm 5 by bolts. In this way, by adjusting the position of the active rod and the swing arm connecting member 9 along the swing arm 5, the circular motion of the pedal with a large stroke can be driven by the linear motion of the driving unit with a small stroke.

[0065] As an optional embodiment of the present invention, the first linear slider guide rail 10 is fixedly installed on the side of the swing arm 5 away from the driving unit 3 , and the slider of the first linear slider guide rail 10 is fixedly connected to the fixing rod 11 .

[0066] As an optional embodiment of the present invention, two sets of second linear slide rails 20 are parallelly arranged on the side of the pedal mounting platform 16 away from the pedal clamp 13, and the slider of each set of second linear slide rails 20 is fixedly connected to the angle adjustment member 21. A second rolling bearing 23 is installed on each first angle adjustment member 21; a linear bearing mounting seat 24 is installed on the inner ring of the second rolling bearing 23; and the linear bearing 22 is installed in the linear bearing mounting seat 24. For details about the installation structure of the linear bearing and the linear bearing mounting seat 24, see Fig.16 and Fig.17 ,like Fig.16 and Fig.17 As shown, the linear bearing mounting seat 24 is provided with a through hole, in which the linear bearing 22 is mounted. The linear bearing 22 is a linear bearing with a flange, and its flange portion is located on the outside of the linear bearing mounting seat 24 away from the pedal clamp body 13. In addition, in order to install the second rolling bearing 23 and fix it to the angle adjustment member 21, a connecting rod 29 is fixedly connected to each of the opposite sides of the linear bearing mounting seat 24. When in use, the two second rolling bearings 23 are first respectively mounted on the two connecting rods, and then the second rolling bearings 23 and the connecting rod 29 are installed on the angle adjustment member 21 (specifically, the second rolling bearing 23 is installed in the bearing hole 27).

[0067] As an optional embodiment of the present invention, the compression spring 19 is installed on the load force adjusting member 18 by interference fit, and the load force adjusting member 18 is installed on the master cylinder simulation member 17 by threaded connection.

[0068] As an optional embodiment of the present invention, Fig.12 As shown in FIG. 1 , the master cylinder simulation member 17 is a cylindrical rod-shaped object with a thread and a U-shaped groove 28 at one end. The master cylinder simulation member 17 is integrally installed in the linear bearing 22 (the master cylinder simulation member 17 is in the Figure 1A linear bearing 22 extends out from one end away from the pedal clamp 13, and can make reciprocating linear motion along the axis of the linear bearing 22; the end where the U-shaped groove is located is provided with a mounting hole, which is connected to the pedal arm through a pin when in use; the middle thread is installed in conjunction with the internal thread of the load force adjustment member 18, and the load force adjustment member 18 can achieve axial position adjustment through the threaded structure, so that the compression spring 19 presents different degrees of compression, thereby providing different requirements of the master cylinder support force for different models of pedals.

[0069] As an optional embodiment of the present invention, Fig.13 and Fig.14 As shown, the load force adjusting member 18 is a cube with an internal threaded hole 25 in the center and a threaded hole 26 on each side. After the four threaded holes 26 are installed with screws, the torque of the load force adjusting member 18 can be increased, which facilitates the axial position adjustment of the load force adjusting member 18 along the master cylinder simulation member 17.

[0070] As an optional embodiment of the present invention, Fig.15 As shown, the angle adjustment member 21 is a T-shaped structural member, which is connected to the slider of the second linear slide rail 20 through four holes at the bottom, and has a bearing hole 27 in the middle for installing a bearing. The whole member can move up and down with the slider of the second linear slide rail 20, so that the master cylinder simulation member 17 connected to the pedal can form different angles with the pedal arm to adapt to different models of pedals.

[0071] As an optional embodiment of the present invention, the driving unit 3 may be selected from one of the driving devices such as an electric cylinder, a pneumatic cylinder and a hydraulic cylinder; the most preferred one is an electric cylinder.

[0072] As an optional embodiment of the present invention, Figure 7 and Figure 8 As shown, the pedal clamp 13 is composed of a first clamp body 1301 and a second clamp body 1302 which are arranged opposite to each other, wherein the first clamp body 1301 is two independently arranged vertical plates with threaded holes at both ends, and the second clamp body 1302 is a structure with threaded holes at all four corners, and the two opposite sides are concave, and the concave part is provided with mounting holes.

[0073] A pedal structure suitable for the present invention, such as Figure 5 and Figure 6As shown, the pedal mounting seat 15, the pedal arm 30, and the pedal surface 31 are rotatably connected with the pedal mounting seat 15 through a pin shaft. The pedal arm 30 is provided with a pin shaft hole 32, through which the pedal arm 30 can be connected with the master cylinder simulation member 17 through a pin shaft. During the test installation, the pedal surface 31 is placed between the first clamp body 1301 and the second clamp body 1302, and the first clamp body 1301, the pedal surface 31 and the second clamp body 1302 are fixedly connected by bolts, so that the pedal clamp 13 can clamp the pedal surface 31 and fix it. 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 the screw of the pedal mounting seat 15, and the other end is connected to the pin shaft installed in the pin shaft hole 32, and one end is fixed and the other end rotates.

[0074] The installation process of the entire novel brake pedal fatigue durability test device of the present invention can be:

[0075] Installation of the pedal part: the pedal is fixed to the pedal mounting seat 15 by bolts, the pedal mounting seat 15 is fixed to the pedal mounting frame 16 by bolts, two sets of second linear slider guides 20 are fixed to the left and right sides of the back of the pedal mounting frame 16 by bolts, the angle adjustment member 21 is fixed to the slider in the second linear slider guide 20 by bolts, the outer rings of the two second rolling bearings 23 are installed on the angle adjustment member 21 by interference fit, the linear bearing mounting seat 24 is installed on the inner ring of the rolling bearing 23 by interference fit, the linear bearing 22 is fixed to the linear bearing mounting seat 24 by bolts, the compression spring 19 is installed on the load force adjustment member 18 by interference fit, the load force adjustment member 18 is installed on the master cylinder simulation member 17 by threaded connection, one end of the master cylinder simulation member 17 is connected to the pedal through a pin shaft, and the other end is installed on the linear bearing 22.

[0076] Installation of the swing arm part: the outer ring of the first rolling bearing 6 is installed on the swing arm mounting frame 7 by clearance fit, the bearing end cover 8 is fixed to the swing arm mounting frame 7 by bolts, the swing arm 5 is installed on the inner ring of the rolling bearing 6 by interference fit, the first linear slider guide 10 is fixed to one side of the swing arm 5 by bolts, the active rod and the swing arm connecting piece 9 are fixed to the other side of the swing arm 5 by bolts, one end of the fixed rod 11 is fixed to the slider of the first linear slider guide 10 by bolts, and the other end is fixed to the force sensor 12 by bolts, the force sensor 12 is fixed to the pedal clamp 13 by bolts, the pedal clamp 13 clamps the pedal surface 31, and the position of the pedal clamp 13 is adjusted so that the fixed rod 11 is perpendicular to the pedal surface.

[0077] Installation of the drive unit part: the drive unit 3 is installed on the drive unit mounting connector 2 through a pin shaft, the drive unit mounting connector 2 is fixed to the drive unit mounting stand 1 through bolts, one end of the active rod 4 is installed on the drive unit 3 by threading, and the other end is connected to the active rod and the swing arm connector 9 through a pin shaft.

[0078] At this point, the test equipment has been installed.

[0079] When in use, adjust the load force adjustment member 18 to the maximum position, the compression spring 19 is in a completely relaxed state, the drive unit 3 extends a certain displacement (for example, 30 mm), adjust the position of the active rod and the swing arm connector 9 along the swing arm 5 direction, and the relative position relationship between the drive unit mounting stand 1 and the swing arm mounting stand 7, and the swing arm mounting stand 7 and the pedal mounting stand 16, so that the pedal moves from the initial state to the required position (for example, 85% of the full stroke), adjust the load force adjustment member 18 so that one end of the compression spring 19 contacts the linear bearing mounting seat 24, and continue to adjust the load force adjustment member 18 according to the feedback value of the force sensor to compress the compression spring 19 until the force value reaches the required value (for example, 500N), and the drive unit 3 retracts, and the debugging and setting of the test device is completed. The test can be started. During the test, the force and displacement values ​​can be collected in real time.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of pedal fatigue durability test device, characterized by: It comprises a drive unit mounting frame (1), a swing arm mounting frame (7) and a pedal mounting frame (16); The drive unit mounting stand (1) is provided with a drive unit (3), and an output end of the drive unit (3) is connected to a swing arm (5); The swing arm mounting stand (7) is rotatably connected to a swing arm (5) whose lower end can swing toward and away from the drive unit (3); the swing arm (5) is vertically connected to a fixed rod (11) via a first linear slider guide rail (10), and the connection form is a moving pair; the fixed rod is connected to a force sensor (12); the force sensor (12) is mounted on a pedal clamp (13), and the pedal clamp (13) can support the pedal surface; A pedal mounting seat (15) for mounting a pedal is mounted on the side of the pedal mounting platform (16) close to the pedal clamp (13), and two angle adjustment members (21) that can slide up and down are mounted in parallel on the side of the pedal mounting platform (16) away from the pedal clamp (13); a linear bearing (22) is rotatably connected between the two angle adjustment members (21); one end of the linear bearing (22) close to the pedal clamp (13) is connected to a master cylinder simulation member (17); the other end of the master cylinder simulation member (17) can be connected to a pedal; a load force adjustment member (18) is provided on the master cylinder simulation member (17), and a compression spring (19) is installed between the load force adjustment member (18) and the linear bearing (22); The drive unit (3) is connected to the drive unit mounting stand (1) via a drive unit mounting connector (2), and the connection is in the form of a revolute pair; The driving unit (3) and the swing arm (5) are connected via an active rod (4), and the active rod (4) can perform telescopic movement along with the driving unit (3); The active rod (4) and the swing arm (5) are connected via an active rod and swing arm connecting piece (9), and the connection form is a revolute pair; the installation position of the active rod and swing arm connecting piece (9) along the height direction of the swing arm (5) is adjustable; The swing arm (5) and the swing arm mounting stand (7) are connected via a first rolling bearing (6), and the connection form is a revolute pair.

2. The new pedal fatigue durability test device according to claim 1 is characterized in that: The driving unit (3), the active rod (4), the swing arm (5), the first rolling bearing (6), the first linear slider guide rail (10), the fixing rod (11) and the pedal clamp (13) form a four-bar linkage.

3. The new pedal fatigue durability test device according to claim 1 is characterized in that: The fixing rod (11) is rigidly connected to the force sensor (12); the fixing rod (11) is vertically arranged to the pedal supported by the pedal clamp (13) during the test.

4. The new pedal fatigue durability test device according to claim 1 is characterized in that: The first linear slider guide rail (10) is fixedly mounted on a side of the swing arm (5) away from the drive unit (3), and a slider of the first linear slider guide rail (10) is fixedly connected to a fixing rod (11).

5. The new pedal fatigue durability test device according to claim 1 is characterized in that: Two sets of second linear slide rails (20) are arranged in parallel on one side of the pedal mounting stand (16) away from the pedal clamp (13), and an angle adjustment member (21) is fixedly connected to a slider of each set of second linear slide rails (20); And / or, each first angle adjustment member (21) is mounted with a second rolling bearing (23); the inner ring of the second rolling bearing (23) is mounted with a linear bearing mounting seat (24); and the linear bearing (22) is mounted in the linear bearing mounting seat (24); And / or, the compression spring (19) is installed on the load force adjustment member (18) by interference fit, and the load force adjustment member (18) is installed on the master cylinder simulation member (17) by threaded connection.

6. The novel pedal fatigue durability testing device according to claim 1 or 5, characterized in that: The master cylinder simulation member (17) is a cylindrical rod-shaped object with a U-shaped groove and a thread at one end, which is installed in a linear bearing (22) as a whole and can perform reciprocating linear motion along the axis of the linear bearing (22); And / or, the load force adjustment member (18) is a cube with an internal threaded hole in the center, and each side has a threaded hole, and a screw is installed in each threaded hole; And / or, the angle adjustment member (21) is a T-shaped structural member, with a bearing hole for bearing installation being provided in the middle.

7. The new pedal fatigue durability test device according to claim 6 is characterized in that: An angle sensor (14) is installed between the pedal mounting seat (15) and the pedal arm of the pedal.

8. The new pedal fatigue durability test device according to claim 6 is characterized in that: The driving unit (3) is one of an electric cylinder, a pneumatic cylinder and a hydraulic cylinder.

9. The new pedal fatigue durability test device according to claim 6 is characterized in that: The driving unit (3) is an electric cylinder.

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