阅读说明：本技术 一种摩托车减震器连续冲击疲劳试验装置 (Continuous impact fatigue test device for motorcycle shock absorber ) 是由 丁予涵 朱小琴 朱鹏程 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种摩托车减震器连续冲击疲劳试验装置,其机械部分由减速电机、导轮、钢丝绳、底座、槽钢立柱、尼龙棒、落锤、圆柱导轨、抓取机构、横梁、链条、链轮、楔形机构、气缸和气缸安装板组成；控制部分由信号单元、输入信号调理电路、滤波电路、计算机、PCI-1711L板卡、输出信号调理电路、制动电阻、变频器、减速电机和气动换向阀组成。本发明构造简单,节约成本,安装方便,自动化程度高,系统单次循环周期短,极大地提高了减震器疲劳试验的效率。(The invention discloses a continuous impact fatigue test device for a motorcycle shock absorber, wherein a mechanical part of the device consists of a speed reducing motor, a guide wheel, a steel wire rope, a base, a channel steel upright post, a nylon rod, a drop hammer, a cylindrical guide rail, a grabbing mechanism, a cross beam, a chain wheel, a wedge-shaped mechanism, a cylinder and a cylinder mounting plate; the control part consists of a signal unit, an input signal conditioning circuit, a filter circuit, a computer, a PCI-1711L board card, an output signal conditioning circuit, a brake resistor, a frequency converter, a speed reducing motor and a pneumatic reversing valve. The invention has simple structure, cost saving, convenient installation, high automation degree and short single cycle period of the system, and greatly improves the efficiency of the fatigue test of the shock absorber.)

1. The utility model provides a motorcycle bumper shock absorber is impact fatigue test device in succession which characterized in that: the mechanism comprises a mechanism part, wherein the mechanism part consists of a speed reducing motor (100), a guide wheel (1), a steel wire rope (2), a base (3), a channel steel upright post (4), a nylon rod (5), a drop hammer (6), a cylindrical guide rail (7), a grabbing mechanism (8), a cross beam (9), a chain (10), a chain wheel (11), a wedge-shaped mechanism (12), an air cylinder (13) and an air cylinder mounting plate (14), the air cylinder (13) is positioned above the base (3) and fixedly connected with the channel steel upright post (4) through the air cylinder mounting plate (14), the speed reducing motor (100) is fixedly arranged inside the base (3), an output shaft of the speed reducing motor (100) is connected with the guide wheel (1) through a key, the steel wire rope (2) is fixed in a rope groove of the guide wheel (1), and the other end of the steel wire rope (2) penetrates through the inner side of the channel steel upright post (4) and is fixedly connected with one end of the chain (10), chain (10) articulates behind sprocket (11) of installing in crossbeam (9) top and snatchs mechanism (8), equivalent girth behind guide pulley (1) winding wire rope (2) equals the stroke of snatching mechanism (8), it is on cylindrical guide rail (7) of both sides respectively sliding connection to snatch the mechanism both ends, it can be inserted and firm the connection by the bellied mushroom head form guide arm in drop hammer (6) upper portion to snatch mechanism (8), wedge mechanism (12) are inserted and are snatched mechanism (8) after snatch mechanism (8) and are separated with drop hammer (6), drop hammer (6) both ends are freely rolling on cylindrical guide rail (7) through the middle nylon gyro wheel that is arcuation sunken, drop hammer (6) lower extreme face personally submits sunken form, cylinder mounting panel (14) upper portion bilateral symmetry arranges two nylon stick (5), the terminal surface sunken degree of depth equals nylon stick (5) height and sunken width can cover two nylon stick (5) height completely under drop hammer (6) (5).

2. The motorcycle shock absorber continuous impact fatigue test device according to claim 1, characterized in that: and two ends of the grabbing mechanism (8) are sleeved on the cylindrical guide rails (7) at two sides through sliding bearings.

3. The motorcycle shock absorber continuous impact fatigue test device according to claim 1, characterized in that: the automatic control system is characterized by further comprising a control part, wherein the control part consists of a signal unit (20), an input signal conditioning circuit (30), a filter circuit (40), a computer (50), a PCI-1711L board card (60), an output signal conditioning circuit (70), a brake resistor (80), a frequency converter (90), a speed reducing motor (100) and a pneumatic reversing valve (110), the signal unit (20) consists of an automatic/manual selection switch (21), a manual lifting/automatic starting button (22), a manual descending button (23), a manual stopping button (24), a first proximity switch (25) to a fourth proximity switch (28) and an acceleration sensor (29), the PCI-1711L board card (60) is provided with a digital quantity input module (61), an analog quantity input module (62) and a digital quantity output module (63), and other elements except the acceleration sensor (29) in the signal unit (20) are connected with the input signal conditioning circuit (30) The input signal conditioning circuit (30) is connected with the digital input module (61) again, the acceleration sensor (29) is connected with the filter circuit (40) and the analog input module (62) in series in sequence, the digital output module (63) is connected with the output signal conditioning circuit (70), the output signal conditioning circuit (70) is connected with the frequency converter (90) and the speed reducing motor (100) in sequence, the frequency converter (90) is also connected with the brake resistor (80), the output signal conditioning circuit (70) is also connected with the pneumatic reversing valve (110), the input signal conditioning circuit (30) converts 0/24V direct current signals into 0/5V direct current signals, and the output signal conditioning circuit (70) converts 0/5V direct current signals into 0/24V direct current signals.

4. The motorcycle shock absorber continuous impact fatigue test device according to claim 3, characterized in that: first proximity switch (25) all install in on same one side channel-section steel stand (4), wherein first proximity switch (25) mounting height is than snatching the extreme position that mechanism (8) are located the top and hang down 1cm, and second proximity switch (26) mounting height is less than first proximity switch (25) and snatchs the one fifth of mechanism (8) whole stroke, and third proximity switch (27) mounting height is located the lowest position of snatching mechanism (8) stroke, and fourth proximity switch (28) mounting height is higher than nylon stick (5) peak by 5cm, just fourth proximity switch (28) are response magnetic hall type proximity switch.

5. The motorcycle shock absorber continuous impact fatigue test device according to claim 3, characterized in that: and an acceleration sensor (29) and a magnet sensed by the fourth proximity switch (28) are mounted on the drop hammer (6).

6. The motorcycle shock absorber continuous impact fatigue test device according to claim 3, characterized in that: the frequency converter (90) controls the high speed and the low speed of the speed reducing motor (100) through two fixed speeds which can be set in the frequency converter, and the speed reducing motor (100) is provided with a brake device.

7. The motorcycle shock absorber continuous impact fatigue test device according to claim 3, characterized in that: the control part has two modes of automatic control and manual control, when the automatic/manual selection switch (21) is in an automatic mode, the manual lifting/automatic starting button (22) is used as a starting button of the automatic mode, and when the automatic/manual selection switch (21) is in a manual mode, the manual lifting/automatic starting button (22) is used as a lifting button of the manual mode.

Technical Field

The invention belongs to the field of product performance testing, relates to a fatigue performance testing device, and particularly relates to a continuous impact fatigue testing device for a motorcycle shock absorber.

Background

The shock absorber is taken as a key part integrating safety and performance into a whole for a motorcycle, the performance of the shock absorber can be detected before the shock absorber product leaves a factory or the whole motorcycle is assembled, two common fatigue test methods are adopted at present, one method is to adopt a single shock absorber to be vertically installed and carry out sinusoidal shock excitation for hundreds of thousands or even hundreds of thousands of times with certain amplitude and frequency, the difference between the loading mode of the shock absorber and the actual working condition of the shock absorber on the motorcycle is large, the consumed time is long, and the durability test of the shock absorber can be completed only about two weeks. The other type is a rotary drum test, a suspension is formed by double front dampers, wheels are arranged on the suspension, the suspension is installed on a rotary drum testing machine according to an actual inclination angle, impact excitation is generated on the wheels by bosses on the wheels through rotation of a rotary drum, the installation angle of a shock absorber is the same as the actual working condition in the test method, lateral force is applied to the shock absorber in the test, the test method is close to the actual working condition of the shock absorber, and the time is also long.

The traditional fatigue performance testing device cannot meet the testing requirements of high-end damping products. Lack of test equipment and means causes domestic motorcycle shock absorber production enterprises to stay in low-end or middle-low end levels for a long time and are difficult to enter the production and sale of high-end shock absorbers. Therefore, the domestic damper industry needs to improve detection means, improve testing equipment and meet the requirement of upgrading and transforming enterprise products. Actually, due to the difference of loading strength, compared with the low-strength impact, the impact response of a working part subjected to high-strength impact load has a plurality of different laws, under the impact of high speed (the loading speed of 4m/s-5m/s is 8-10 times of that of the two test methods), the internal pressure of the shock absorber at the impact moment is increased sharply, higher requirements are provided for the quality of internal parts of the shock absorber, particularly the wear resistance of a piston and a cylinder wall and the quality of a sealing element, and the high-strength impact test aims to simulate the real working condition of a high-end shock absorption product during use as much as possible, so that real test data are provided for engineering design. Aiming at the impact fatigue test of the motorcycle shock absorber, the drop hammer type impact testing machine takes the strength and the durability of the shock absorber into consideration, is high-strength impact loading equipment which has simple structure, stable operation and good continuity, and aims at the high-end motorcycle shock absorber to replace the traditional sine shock excitation test and rotary drum type impact test device, thereby greatly shortening the test time and improving the test efficiency.

Disclosure of Invention

The invention aims to provide a continuous impact fatigue test device for a motorcycle shock absorber, aiming at the problems and the defects in the existing test.

In order to achieve the purpose, the invention adopts the technical scheme that:

a continuous impact fatigue test device for a motorcycle shock absorber comprises a mechanism part, wherein the mechanism part comprises a speed reducing motor, a guide wheel, a steel wire rope, a base, a channel steel upright post, a nylon rod, a drop hammer, a cylindrical guide rail, a grabbing mechanism, a cross beam, a chain wheel, a wedge-shaped mechanism, a cylinder and a cylinder mounting plate, the cylinder is positioned above the base and is fixedly connected with the channel steel upright post through the cylinder mounting plate, the speed reducing motor is fixedly arranged inside the base, an output shaft of the speed reducing motor is connected with the guide wheel through a key, the steel wire rope is fixed and wound in a rope groove of the guide wheel, the other end of the steel wire rope penetrates through the inner side of the channel steel upright post and is fixedly connected with one end of the chain, the chain is hung on the grabbing mechanism after passing through the chain wheel arranged above the cross beam, the equivalent circumference of the guide wheel wound on the steel wire rope is equal to the stroke of the grabbing mechanism, and the two ends of the grabbing mechanism are respectively connected to the cylindrical guide rails on the two sides in a sliding manner, the grabbing mechanism is characterized in that a component arranged in the grabbing mechanism can be inserted into and firmly connected with a mushroom-head-shaped guide rod protruding from the upper portion of a drop hammer, the grabbing mechanism is separated from the drop hammer after the wedge-shaped mechanism is inserted into the grabbing mechanism, two ends of the drop hammer freely roll on a cylindrical guide rail through a nylon roller with the middle being arcuately concave, the lower end face of the drop hammer is concave, two nylon rods are symmetrically arranged on the upper portion of the cylinder mounting plate in a left-right mode, the concave depth of the lower end face of the drop hammer is equal to the height of the nylon rods, and the concave width of the lower end face of the drop hammer can completely cover the two nylon rods.

Preferably, two ends of the grabbing mechanism are sleeved on the cylindrical guide rails on two sides through sliding bearings.

Preferably, the device also comprises a control part, wherein the control part consists of a signal unit, an input signal conditioning circuit, a filter circuit, a computer, a PCI-L board card, an output signal conditioning circuit, a brake resistor, a frequency converter, a speed reducing motor and a pneumatic reversing valve, the signal unit consists of an automatic/manual selection switch, a manual lifting/automatic starting button, a manual descending button, a manual stopping button, a first proximity switch, a fourth proximity switch and an acceleration sensor, the PCI-L board card is provided with a digital quantity input module, an analog quantity input module and a digital quantity output module, other elements except the acceleration sensor in the signal unit are connected with the input signal conditioning circuit, the input signal conditioning circuit is connected with the digital quantity input module, and the acceleration sensor is sequentially connected with the filter circuit and the analog quantity input module in series, the digital quantity output module is connected with an output signal conditioning circuit, the output signal conditioning circuit is sequentially connected with a frequency converter and a speed reducing motor in series, the frequency converter is further connected with a brake resistor, the output signal conditioning circuit is further connected with a pneumatic reversing valve, the input signal conditioning circuit converts/V direct current signals into/V direct current signals, and the output signal conditioning circuit converts the/V direct current signals into/V direct current signals.

Preferably, the first proximity switch to the fourth proximity switch are installed on the same side of the channel steel stand column, wherein the installation height of the first proximity switch is 1cm lower than the limit position of the grabbing mechanism at the top, the installation height of the second proximity switch is one fifth of the whole stroke of the grabbing mechanism lower than that of the first proximity switch, the installation height of the third proximity switch is located at the lowest position of the grabbing mechanism stroke, the installation height of the fourth proximity switch is 5cm higher than the highest point of the nylon rod, and the fourth proximity switch is a Hall type proximity switch capable of inducing magnetism.

Preferably, an acceleration sensor and a magnet sensed by the fourth proximity switch are mounted on the drop hammer.

Preferably, the frequency converter controls the high speed and the low speed of the speed reducing motor through two fixed speeds which can be set in the frequency converter, and the speed reducing motor is provided with a brake device.

Preferably, the control part has two modes of automatic control and manual control, when the automatic/manual selection switch is in an automatic mode, the manual lifting/automatic starting button is used as a starting button of the automatic mode, and when the automatic/manual selection switch is in a manual mode, the manual lifting/automatic starting button is used as a lifting button of the manual mode.

The invention has the advantages and beneficial effects that:

(1) the control system for the continuous impact fatigue test of the shock absorber has the advantages of simple structure, convenience in installation and cost saving.

(2) The control system for the shock absorber continuous impact fatigue test has high automation degree, and the single cycle period is short when the system automatically runs, so that the efficiency of the shock absorber fatigue test is greatly improved.

(3) The continuous impact fatigue test control system of the shock absorber can automatically and continuously grab and release the drop hammer, and the secondary impact of the drop hammer can be prevented by using the air cylinder.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a control schematic of the present invention.

In the figure: 1-guide wheel, 2-steel wire rope, 3-base, 4-channel steel column, 5-nylon rod, 6-drop hammer, 7-cylindrical guide rail, 8-grabbing mechanism, 9-beam, 10-chain, 11-chain wheel, 12-wedge mechanism, 13-cylinder, 14-cylinder mounting plate, 20-signal unit, 21-automatic/manual selection switch, 22-manual lifting/automatic starting button, 23-manual descending button, 24-manual stopping button, 25-first proximity switch, 26-second proximity switch, 27-third proximity switch, 28-fourth proximity switch, 29-acceleration sensor, 30-input signal conditioning circuit, 40-filter circuit and 50-computer, the device comprises a 60-PCI-1711L board card, a 61-digital input module, a 62-analog input module, a 63-digital output module, a 70-output signal conditioning circuit, 80-brake resistors, a 90-frequency converter, 100-speed reducing motor and 110-pneumatic reversing valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-2, a continuous impact fatigue test device for a motorcycle shock absorber comprises a mechanism part, wherein the mechanism part comprises a speed reducing motor 100, a guide wheel 1, a steel wire rope 2, a base 3, a channel steel upright post 4, a nylon rod 5, a drop hammer 6, a cylindrical guide rail 7, a grabbing mechanism 8, a cross beam 9, a chain 10, a chain wheel 11, a wedge mechanism 12, a cylinder 13 and a cylinder mounting plate 14, the cylinder 13 is positioned above the base 3, the cylinder 13 is fixedly connected with the channel steel upright post 4 through the cylinder mounting plate 14, the speed reducing motor 100 is fixedly arranged inside the base 3, an output shaft of the speed reducing motor 100 is connected with the guide wheel 1 through a key, the steel wire rope 2 is fixed and wound in a rope groove of the guide wheel 1, the other end of the steel wire rope 2 penetrates through the inner side of the channel steel upright post 4 and is fixedly connected with one end of the chain 10, the grabbing mechanism 8 is hooked after the chain 10 passes through the chain wheel 11 arranged above the cross beam 9, the equivalent circumference of the grabbing mechanism 8 after the steel wire rope 1 is wound on the chain guide wheel 2 is equal to the stroke of the grabbing mechanism 8, snatch the mechanism both ends respectively sliding connection on the cylinder guide 7 of both sides, the component of snatching the mechanism 8 built-in can be inserted and firm connection by the bellied mushroom head form guide arm in drop 6 upper portion, wedge mechanism 12 snatchs mechanism 8 and drop 6 separation after inserting and snatching the mechanism 8, the nylon gyro wheel that drop 6 both ends are the arcuation sunken through the centre freely rolls on cylinder guide 7, the sunken form of drop 6 lower extreme personally submits, two nylon stick 5 of 14 upper portions bilateral symmetry arrangement of cylinder mounting panel, the terminal surface sunken degree of depth equals nylon stick 5 height and sunken width can cover two nylon stick 5 completely under the drop 6.

Two ends of the grabbing mechanism 8 are sleeved on the cylindrical guide rails 7 on two sides through sliding bearings.

The control part comprises a signal unit 20, an input signal conditioning circuit 30, a filter circuit 40, a computer 50, a PCI-1711L board card 60, an output signal conditioning circuit 70, a brake resistor 80, a frequency converter 90, a speed reducing motor 100 and a pneumatic directional control valve 110, wherein the signal unit 20 comprises an automatic/manual selection switch 21, a manual lifting/automatic starting button 22, a manual descending button 23, a manual stopping button 24, a first proximity switch 25 to a fourth proximity switch 28 and an acceleration sensor 29, the PCI-1711L board card 60 is provided with a digital quantity input module 61, an analog quantity input module 62 and a digital quantity output module 63, other elements except the acceleration sensor 29 in the signal unit 20 are connected with the input signal conditioning circuit 30, the input signal conditioning circuit 30 is further connected with the digital quantity input module 61, the acceleration sensor 29 is sequentially connected with the filter circuit 40 and the analog quantity input module 62 in series, the digital quantity output module 63 is connected with the output signal conditioning circuit 70, the output signal conditioning circuit 70 is sequentially connected with the frequency converter 90 and the speed reducing motor 100 in series, the frequency converter 90 is further connected with the brake resistor 80, the output signal conditioning circuit 70 is further connected with the pneumatic reversing valve 110, the input signal conditioning circuit 30 converts 0/24V direct current signals into 0/5V direct current signals, and the output signal conditioning circuit 70 converts 0/5V direct current signals into 0/24V direct current signals.

The first proximity switch 25 to the fourth proximity switch 28 are all installed on the channel steel upright 4 on the same side, wherein the installation height of the first proximity switch 25 is 1cm lower than the extreme position of the grabbing mechanism 8 at the top, when the grabbing mechanism 8 carries the drop hammer 6 to move upwards and triggers the first proximity switch 25, at the moment, the wedge-shaped mechanism 12 is just inserted into the grabbing mechanism 8, the drop hammer 6 and the grabbing mechanism 8 start to separate, the drop hammer 6 falls in a state of approximate free falling body, and the grabbing mechanism 8 stops moving under the action of the brake of the speed reducing motor 100; the installation height of the second proximity switch 26 is one fifth of the whole stroke of the grabbing mechanism 8 lower than that of the first proximity switch 25, and when the grabbing mechanism 8 carries the drop hammer 6 to move upwards and triggers the second proximity switch 26, the lifting speed of the speed reducing motor 100 is switched from high speed to low speed; the mounting height of the third proximity switch 27 is at the lowest position of the stroke of the gripping mechanism 8, and is used as the initial position of the whole test device during automatic operation, and the initial state of the automatic operation mode requires manual connection of the gripping mechanism 8 and the drop hammer 6; the installation height of the fourth proximity switch 28 is 5cm higher than the highest point of the nylon rod 5, the fourth proximity switch 28 is a Hall type proximity switch for sensing magnetism, when the drop hammer 6 drops to the position of the fourth proximity switch 28 in an approximate free falling body, the pneumatic reversing valve 110 controls the piston rod of the cylinder 13 to extend out so as to support the drop hammer 6 and prevent the drop hammer 6 from being impacted by the shock absorber for the second time, and the nylon rod 5 is used for protecting the cylinder 13 and preventing the piston of the cylinder 13 from impacting the cylinder cover under the action of the drop hammer 6.

The falling weight 6 is provided with an acceleration sensor 29 and a magnet sensed by a fourth proximity switch 28, and the acceleration sensor 29 is used for detecting the acceleration generated during the impact of the falling weight 6 on the shock absorber.

The inverter 90 controls the high speed and the low speed of the reduction motor 100 by a two-step fixed speed that can be set therein, and the reduction motor 100 has a brake device.

The control part has two modes of automatic control and manual control, when the automatic/manual selection switch 21 is in the automatic mode, the manual lifting/automatic starting button 22 is used as a starting button of the automatic mode, and when the automatic/manual selection switch 21 is in the manual mode, the manual lifting/automatic starting button 22 is used as a lifting button of the manual mode.

The foregoing is only a preferred embodiment of the present invention. The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such equivalent changes and modifications as would be obvious to one skilled in the art be included herein are deemed to be within the scope and spirit of the present invention as defined by the appended claims.