Friction coefficient detection device and friction coefficient measurement method

Abstract

The present invention relates to a friction coefficient detection device and a friction coefficient measurement method, the friction coefficient detection device comprises a mounting base, a sliding platform, a limit piece, a pulley assembly, a traction piece and a rotating support frame, the sliding platform is arranged on the mounting base; two limit pieces are detachably arranged on the sliding platform, the limit piece is used to limit the first detection piece; the pulley assembly is arranged at one end of the sliding platform; the traction piece component has a accommodating groove for accommodating the second detection piece, one end of the traction piece is connected to the first load through a pull rope, and the pull rope is wound on the pulley assembly; the second detection piece can slide relative to the first detection piece with the traction piece under the action of the first load; the rotating support frame is fixed on the mounting base, the rotating support frame is used to support the third detection piece, one end of the pull rope is wound around the third detection piece, and the other end is connected to the first load, the pull rope cooperates with the pulley assembly, and the third detection piece can rotate relative to the rotating support frame under the action of the first load.

Description

Technical Field

[0001] The present invention relates to the technical field of friction coefficient detection, and in particular to a friction coefficient detection device and a friction coefficient measurement method. Background Art

[0002] The friction coefficient of solid materials is an important parameter in materials research. The conventional method is to use a special material surface friction coefficient tester for testing. However, the testing process and operation of professional testers on the market are relatively complicated.

[0003] The friction coefficient tester in the prior art can only test the friction coefficient of products with specific shapes, but cannot test different products, that is, the scope of application is small. In addition, the friction coefficient test equipment in the prior art can only test a single sliding friction coefficient or a rotational friction coefficient, and there is no equipment that can test both the sliding friction coefficient and the rotational friction coefficient at the same time. Summary of the invention

[0004] Based on this, it is necessary to provide a friction coefficient detection device and a friction coefficient measurement method to address the technical problem that the friction coefficient detection equipment in the prior art has a single detection performance.

[0005] A friction coefficient detection device, the friction coefficient detection device comprising:

[0006] Sliding platform;

[0007] A limiting member, two of which are detachably arranged on the sliding platform, and are used to limit the first detection member;

[0008] A pulley assembly is provided at one end of the sliding platform;

[0009] A traction member, the member having a receiving groove for receiving the second detection member, one end of the traction member is connected to the first load through a pull rope, and the pull rope is wound around the pulley assembly; the second detection member can slide relative to the first detection member along with the traction member under the action of the first load;

[0010] A rotating support frame, wherein the rotating support frame is used to support the third detection member, one end of a pull rope is wound around the third detection member, and the other end is connected to the first load, the pull rope cooperates with the pulley assembly, and the third detection member can rotate relative to the rotating support frame under the action of the first load.

[0011] In one embodiment, the sliding platform has two side surfaces arranged opposite to each other along the first direction, and guide rails are arranged on the two side surfaces; the friction coefficient detection device further includes:

[0012] A rolling member is rotatably disposed on the guide rail, and the rolling member is elastically connected to the traction member.

[0013] In one embodiment, the friction coefficient detection device also includes a pressure block, which is used to be placed on the second detection member to apply positive pressure to the second detection member, and the pressure block and the rolling member are both provided with ears, and the two ends of the elastic member are respectively connected to the ears of the pressure block and the rolling member.

[0014] In one of the embodiments, the traction member is constructed by connecting a plurality of connecting plates end to end, and the plurality of connecting plates enclose and define a through slot, and the through slot is the accommodating slot.

[0015] In one embodiment, the limiting member is configured as a magnetic seat, and the sliding platform is configured as a cast iron material.

[0016] In one embodiment, the friction coefficient detection device further includes a mounting base, and the pulley assembly includes:

[0017] A pulley bracket, fixedly connected to the mounting base;

[0018] A pulley is rotatably mounted on the pulley bracket, and the pull rope is wound around the pulley;

[0019] Wherein, the height of the pulley on the pulley bracket is adjustable so that the portion of the pull rope between the traction member and the pulley is in a horizontal direction.

[0020] In one embodiment, a mounting portion is provided at one end of the pulley bracket, and the mounting portion is constructed as a plate-like structure. A through guide groove is opened on the mounting portion, and the rotating shaft of the pulley is arranged in the guide groove. The position of the rotating shaft in the guide groove is adjustable.

[0021] In one of the embodiments, a measuring piece is provided on the pull rope, and the measuring piece is used to detect the tension applied to the pull rope.

[0022] In one embodiment, the rotating support frame comprises:

[0023] A mandrel mounting frame is fixedly connected to the mounting base, and a mounting groove is configured on the mandrel mounting frame;

[0024] A mandrel, one end of which is disposed in the mounting groove and fixed to the mandrel mounting frame by a fastener;

[0025] Wherein, the position of the core shaft in the mounting groove is adjustable, and the third detection member is used to be rotatably connected to the core shaft.

[0026] A friction coefficient measurement method is provided, wherein the friction coefficient measurement method is used to detect the sliding friction coefficient of a first detection member and a second detection member, and the friction coefficient measurement method comprises the following steps:

[0027] Placing the first detection member on the sliding platform and fixing the first detection member by two stoppers;

[0028] Fixing the second detection member in the receiving groove of the traction member and placing it on the first detection member;

[0029] One end of the pull rope is connected to the traction member, and the other end of the pull rope is connected to the first load, the pull rope is wound around the pulley of the pulley assembly, and a measuring member for detecting the tension applied to the pull rope is provided on the pull rope;

[0030] placing a pressure block on the second detection member, and adjusting the weight of the first load so that the second detection member slides relative to the first detection member along with the traction member;

[0031] The sliding friction coefficient μ between the first detection member and the second detection member is calculated. H .

[0032] In one embodiment, the sliding friction coefficient μ between the first detection member and the second detection member is obtained by calculation. H , calculated by the following formula:

[0033]

[0034] Among them, μ H represents the sliding friction coefficient μ between the first detection member and the second detection member H ;

[0035] G represents the minimum first load value of the second detection member from stationary to sliding;

[0036] F represents the positive pressure generated between the first detection member and the second detection member;

[0037] g represents the deadweight of the second detection member.

[0038] A friction coefficient measuring method is provided, wherein the friction coefficient measuring method is used to detect the rotational friction coefficient of a third detection member, and the friction coefficient measuring method comprises the following steps:

[0039] Connecting the third detection member to the rotating support frame, winding the end of the pull rope away from the first load around the third detection member, and hanging a second load at the end of the pull rope facing the third detection member;

[0040] adjusting the weight of the first load to rotate the third detection member;

[0041] The rotational friction coefficient μ of the third detection member is calculated T .

[0042] In one embodiment, the calculation obtains the rotational friction coefficient μ of the third detection member. T , calculated by the following formula:

[0043]

[0044] Among them, μ T represents the rotational friction coefficient of the third detection member;

[0045] G represents the weight of the first load suspended at the end of the pull rope;

[0046] r2 represents the effective radius of the pulley;

[0047] G0 represents the weight of the second load;

[0048] R represents the radius of the sliding surface of the third detection member. Beneficial effects of the present invention:

[0049] The present invention provides a friction coefficient detection device, wherein a mounting base is used to support and fix a sliding platform, a pulley assembly to rotate a support frame, etc. The sliding platform is used to support a first detection member and cooperate with a limiting member to limit the first detection member. The limiting member is detachably arranged on the sliding platform to facilitate limiting the first detection members of different models. A pulley assembly is arranged on the mounting base to facilitate applying a pulling force to a second detection member placed on the first detection member by hanging a load, thereby achieving the sliding of the second detection member relative to the first detection member. In this way, the sliding friction coefficient of the first detection member and the second detection member can be calculated based on the minimum load of the second detection member from static to sliding. By arranging a traction member, a pull rope with a first load connected to one end is connected to the traction member, and the second detection member is arranged in a receiving groove of the traction member, so that the traction member is pulled by the first load to slide relative to the first detection member, and then the second detection member is driven to slide relative to the first detection member. By fixing the rotating support frame on the mounting base, the third detection member is rotatably connected to the rotating support frame, and the direction of the pull rope is changed through the pulley assembly so that the first load is hung on one end of the pull rope, and the other end of the pull rope is connected to the third detection member, and the third detection member is pulled to rotate by the first load, so as to calculate the rotational friction coefficient of the third detection member according to the minimum load of the third detection member from static to rotation. Through the above structure, both the sliding friction coefficient and the rotational friction coefficient can be detected, thereby improving the applicability of the friction coefficient detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A cross-sectional view of a friction coefficient detection device provided in one embodiment of the present invention when used to detect a sliding friction coefficient;

[0051] Figure 2 An enlarged view of the first detection member and the second detection member in the friction coefficient detection device provided in one embodiment of the present invention;

[0052] Figure 3 A schematic diagram of the structure of the cooperation between the guide rail and the rolling element in the friction coefficient detection device provided by one embodiment of the present invention;

[0053] Figure 4 An enlarged view of a core shaft mounting frame in a friction coefficient detection device provided in one embodiment of the present invention;

[0054] Figure 5 A cross-sectional view of a friction coefficient detection device provided in one embodiment of the present invention when used to detect a rotational friction coefficient;

[0055] Figure 6 A schematic flow chart of a method for measuring sliding friction coefficient provided in one embodiment of the present invention;

[0056] Figure 7 A schematic flow chart of a method for measuring a rotational friction coefficient provided in one embodiment of the present invention.

[0057] Reference numerals:

[0058] Mounting base 100; sliding platform 200; limiting member 300; pulley assembly 400; pulley bracket 410; pulley 420; traction member 500; rotating support frame 600; spindle mounting frame 610; spindle 620; rolling member 700; hanging ear 710; pressure block 800; pull rope 910; measuring member 920; first detection member 930; second detection member 940; third detection member 950; first load 960; guide rail 970; pull ring 980; elastic member 990. DETAILED DESCRIPTION

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0065] See also Figures 1 to 5 As shown, an embodiment of the present invention provides a friction coefficient detection device, which includes a sliding platform 200, a limiter 300, a pulley assembly 400, a traction member 500 and a rotating support frame 600. Two limiters 300 are detachably arranged on the sliding platform 200, and the limiters 300 are used to limit the first detection member 930; the pulley assembly 400 is arranged at one end of the sliding platform 200; the traction member 500 has a receiving groove for accommodating the second detection member 940, and one end of the traction member 500 is connected to the pull rope 910 Connected to the first load 960, the pull rope 910 is wound around the pulley assembly 400; the second detection member 940 can slide relative to the first detection member 930 along with the traction member 500 under the action of the first load 960; the rotating support frame 600 is used to support the third detection member 950, one end of the pull rope 910 is wound around the third detection member 950, and the other end is connected to the first load 960. The pull rope 910 cooperates with the pulley assembly 400, and the third detection member 950 can rotate relative to the rotating support frame 600 under the action of the first load 960.

[0066] The present technical solution provides a friction coefficient detection device, wherein the sliding platform 200 is used to support the first detection member 930 and cooperate with the limiting member 300 to limit the first detection member 930. The limiting member 300 is detachably arranged on the sliding platform 200 so as to limit the first detection member 930 of different models. A pulley assembly 400 is arranged so as to apply a pulling force to the second detection member 940 placed on the first detection member 930 by hanging a load, thereby realizing the sliding of the second detection member 940 relative to the first detection member 930. In this way, the sliding friction coefficients of the first detection member 930 and the second detection member 940 can be calculated based on the minimum load of the second detection member 940 from static to sliding. By setting the traction member 500, the pull rope 910 connected with the first load 960 at one end is connected to the traction member 500, and the second detection member 940 is set in the receiving groove of the traction member 500, so that the traction member 500 is pulled by the first load 960 to slide relative to the first detection member 930, and then the second detection member 940 is driven to slide relative to the first detection member 930. By setting the rotating support frame 600, the third detection member 950 is rotatably connected to the rotating support, and the direction of the pull rope 910 is changed by the pulley assembly 400, so that the first load 960 is suspended at one end of the pull rope 910, and the other end of the pull rope 910 is connected to the third detection member 950, and the third detection member 950 is pulled to rotate by the first load 960, so that the rotational friction coefficient of the third detection member 950 is calculated according to the minimum load of the third detection member 950 from static to rotation. Through the above structure, both the sliding friction coefficient and the rotational friction coefficient can be detected, thereby improving the applicability of the friction coefficient detection device.

[0067] It should be noted that the sliding platform can be arranged on a fixed component, for example, the sliding platform can be arranged on a foundation, or on a component fixed relative to the bottom surface. In the present application, a mounting base 100 is provided, and the mounting base 100 is supported on the bottom surface. The sliding platform 200 is arranged on the mounting base 100, and the rotating support frame 600 is also arranged on the mounting base 100. The mounting base 100 is used to support and fix the sliding platform 200, the pulley assembly 400, and the rotating support frame 600.

[0068] It is understandable that, in the present embodiment, the mounting base 100 is configured as a flat plate-like structure, and the sliding platform 200 is fixedly supported on the mounting base 100 by a support member. The sliding platform 200 is configured as a rectangular plate-like structure. The stopper 300 can be any component arranged on the sliding platform 200, as long as the stopper 300 is connected to the sliding platform 200, the stopper 300 can limit the first detection member 930 from moving relative to the sliding platform 200. There is no restriction on the specific shape of the first detection member 930 and the second detection member 940, and the first detection member 930 and the second detection member 940 can be a block structure. Of course, the first detection member 930 and the second detection member 940 can also be a plane for the relative surfaces of the two, and other parts can be set according to actual needs, as long as the first detection member 930 can be fixed by the stopper 300, the second detection member 940 can be fixed relative to the traction member 500, and can move with the traction member 500.

[0069] In one embodiment, the sliding platform 200 has two side surfaces that are relatively arranged along the first direction, and guide rails 970 are arranged on the two side surfaces; the friction coefficient detection device also includes a rolling member 700, which is rollably arranged on the guide rail 970, and the rolling member 700 is elastically connected to the traction member 500.

[0070] In this embodiment, the first direction is the width direction of the sliding platform 200, and guide rails 970 are provided on two sides of the sliding platform 200 in the width direction. The rolling member 700 is a roller bearing, one end of which is installed in the track of the guide rail 970 and can roll in the guide rail 970. The roller bearing is elastically connected to the traction member 500, so that the second detection member 940 fixedly arranged in the receiving groove of the traction member 500 can generate positive pressure on the first detection member 930. One end of the roller bearing slides in the guide rail 970, so that when the traction member 500 moves relative to the first detection member 930 under the action of the first load 960, the roller bearing can move along the guide rail 970 with the traction member 500, so that the second detection member 940 can always apply positive pressure to the first detection member 930.

[0071] like Figure 1 and Figure 2 As shown, further, the friction coefficient detection device also includes a pressure block 800, which is used to be placed on the second detection member 940 to apply positive pressure to the second detection member 940, and the pressure block 800 and the rolling member 700 are both provided with hanging ears 710, and the two ends of the elastic member 990 are respectively connected to the hanging ears 710 of the pressure block 800 and the rolling member 700. In this embodiment, the elastic member 990 is a spring, and the hanging ears 710 are provided on the pressure block 800 and the rolling member 700, so that the two ends of the spring are respectively hung on the hanging ears 710.

[0072] like Figure 2 As shown, in one embodiment, the traction member 500 is constructed by connecting a plurality of connecting plates end to end, and the plurality of connecting plates enclose and define a through slot, which is a receiving slot. When the second detection member 940 is a square member, the connecting plates are connected end to end in sequence to form a square receiving slot, so that the second detection member can be easily received in the receiving slot.

[0073] In one embodiment, the stopper 300 is configured as a magnetic seat, and the sliding platform 200 is configured as a cast iron material. Specifically, the magnetic seat includes a base and a permanent magnet, a permanent magnet is arranged in the base, and the base is a soft magnetic material. A rotating handle is arranged on the base, and the rotating handle is connected to the permanent magnet. When the permanent magnet is rotated, the direction of the magnetic pole of the permanent magnet can be changed. For example, when the magnetic pole of the permanent magnet is rotated to face the base, the base is magnetized. At this time, the base has a strong magnetism and can be adsorbed with the sliding platform 200. By rotating the rotating handle, when the permanent magnet is in a horizontal direction, the middle of the magnetic pole of the permanent magnet faces the base. At this time, the base will not be magnetized, so that there is almost no magnetic force on the base, so that the base is easily separated from the sliding platform 200. In this embodiment, the sliding platform 200 is configured as a cast iron material so that when the base of the magnetic seat is magnetized, it can be adsorbed with the sliding platform 200.

[0074] In this embodiment, the position-limiting member 300 is configured in the form of a magnetic seat, which is convenient for disassembly. In addition, there is no restriction on the relative position with the sliding platform 200, and the magnetic seat can be adsorbed at any position of the sliding platform 200. Therefore, such a configuration enables the position-limiting member 300 to limit the first detection member 930 of different shapes and sizes.

[0075] like Figure 1 and Figure 5 As shown, in one embodiment, the friction coefficient detection device further includes a mounting base 100, and the pulley assembly 400 includes a pulley bracket 410 and a pulley 420, wherein the pulley bracket 410 is fixedly connected to the mounting base 100; the pulley 420 is rotatably arranged on the pulley bracket, and the pull rope 910 is wound around the pulley 420; wherein the height of the pulley 420 on the pulley bracket 410 is adjustable so that the portion of the pull rope 910 between the traction member 500 and the pulley 420 is in a horizontal direction. Further, a mounting portion is provided at one end of the pulley bracket 410, and the mounting portion is constructed as a plate-like structure, and a through guide groove is provided on the mounting portion, and the rotating shaft of the pulley 420 is arranged in the guide groove, and the position of the rotating shaft in the guide groove is adjustable.

[0076] In this embodiment, the pulley bracket 410 is used to support the pulley 420, so as to change the direction of the pull rope 910 wound around the pulley 420, and at the same time, the first load 960 connected to one end of the pull rope 910 can be in a suspended state, so that the traction member 500 is pulled to slide relative to the first detection member 930 by the weight of the first load 960. By setting the mounting portion as a plate-like structure and providing a through guide groove on the mounting portion, the rotating shaft of the pulley 420 can be set in the guide groove, and the height of the pulley 420 can be adjusted by adjusting the position of the rotating shaft in the guide groove. By adjusting the height of the pulley, the portion of the pull rope 910 located between the traction member 500 and the pulley 420 can be adjusted in the horizontal direction, so that the detection force will not be decomposed due to the pull rope 910 having a certain angle, thereby ensuring the accuracy of the detection.

[0077] like Figure 1 and Figure 5 As shown, in the present embodiment, two pulley assemblies 400 are arranged at one end of the sliding platform 200, and the height of the two pulleys 420 should be adjusted to the same level as the traction member 500 when the sliding friction coefficient between the first detection member 930 and the second detection member 940 is detected. Specifically, a pull ring 980 is arranged at the end of the traction member 500, and one end of the pull rope 910 is connected to the pull ring 980. The highest point of the pulleys 420 on the two pulley assemblies 400 should be adjusted to the same level as the height of the pull ring 980, so that the pull rope 910 is on the horizontal plane, so that the pull rope 910 applies a horizontal pulling force to the traction member. Accordingly, when the rotational friction coefficient of the second detection member 940 is detected, the height of the highest point of the two pulleys 420 should be adjusted to be consistent with the height of the third detection member 950.

[0078] Specifically, when the position of the rotating shaft relative to the guide groove is adjusted to a preset position, the rotating shaft and the mounting portion can be locked by tightening the nut to prevent the rotating shaft from sliding relative to the guide groove, and further to prevent the pulley from sliding relative to the mounting portion, thereby enabling a more stably detected friction coefficient of the corresponding components.

[0079] like Figure 1 and Figure 5As shown, in one embodiment, a measuring member 920 is provided on the pull rope, and the measuring member 920 is used to detect the tension on the pull rope. Specifically, the measuring member 920 is a tension sensor, and the tension sensor is provided on the pull rope so as to detect the tension on the pull rope through the tension sensor, thereby calculating the sliding friction coefficient of the second detection member through the minimum tension value on the pull rope when the second detection member slides from static to relative to the first detection member. Correspondingly, the rotational friction coefficient of the third detection member is calculated through the minimum tension value on the pull rope when the third detection member rotates from static to relative to the shaft core.

[0080] like Figure 1 , Figure 4 and Figure 5 As shown, in one embodiment, the rotating support frame 600 includes a core shaft mounting frame 610 and a core shaft 620, the core shaft mounting frame 610 is fixedly connected to the mounting base 100, and a mounting groove is constructed on the core shaft mounting frame 610; one end of the core shaft 620 is arranged in the mounting groove and is fixed to the core shaft mounting frame 610 by a fastener; wherein, the position of the core shaft 620 in the mounting groove is adjustable, and the third detection member is used to be rotatably connected to the core shaft 620.

[0081] like Figure 1 and Figure 5 As shown, in this embodiment, the mandrel mounting frame 610 is fixedly connected to the mounting base 100, and a mounting groove is constructed on the mandrel mounting frame 610, so that one end of the mandrel 620 is arranged in the mounting groove and fixedly connected to the mandrel mounting frame 610 by a fastener. The mandrel 620 is used to be rotatably connected to the third detection member, and the mandrel 620 is fixedly connected to the mandrel mounting frame 610 to achieve a rotatable connection of the third detection member relative to the mandrel mounting frame 610. Specifically, the fastener can be a fastening nut, wherein an external thread is arranged at one end of the mandrel 620 to facilitate threaded cooperation with the fastening nut.

[0082] like Figure 6 As shown, an embodiment of the present invention provides a friction coefficient measurement method, and the friction coefficient measurement method includes the following steps:

[0083] S110, placing the first detection member on the sliding platform, and fixing the first detection member by two limit members;

[0084] S120, fixing the second detection member in the receiving groove of the traction member and placing it on the first detection member;

[0085] S130, connecting one end of the pull rope to the traction member, and the other end of the pull rope to the first load, the pull rope is wound around the pulley of the pulley assembly, and a measuring member for detecting the tension of the pull rope is provided on the pull rope;

[0086] S140, placing a pressure block on the second detection member, and adjusting the weight of the first load so that the second detection member slides relative to the first detection member along with the traction member;

[0087] S150, calculating the sliding friction coefficient μ between the first detection member and the second detection member H .

[0088] Wherein, the above steps and methods are used to detect the coefficient of sliding friction between the first detection member and the second detection member. Specifically, the mounting base is a sliding platform, a pulley assembly and a rotating support frame mounting base, all of which are reliably fixed to the corresponding positions of the mounting base by bolts. Two symmetrically arranged guide rails are installed on the two pairs of sides of the sliding platform, one end of the roller bearing is installed in the track of the guide rail and can roll in the track, and the other end of the roller bearing has a spring lug extending therefrom. When measuring the coefficient of sliding friction between the first detection member and the second detection member, the first detection member is placed on the sliding platform and adsorbed on the sliding platform using two magnetic seats, wherein the sliding platform is a cast iron material, and the first detection member can be firmly restricted on the sliding platform so that it does not slide between relative planes. The second detection member is placed on the first detection member, and the second detection member is fixed by the receiving groove of the traction member, and a pull ring is provided on the traction member, one end of the pull ring is fixedly connected to the traction member, and the other end of the pull ring is connected to the pull rope. A pressure block is placed above the second detection member, and spring ears are provided on both sides of the pressure block. One end of the spring is hung on the spring ear of the pressure block, and the other end is hung on the spring ear extending from the roller bearing. The tension springs arranged symmetrically on both sides will generate a positive pressure F between the first detection member and the second detection member. The pull rope is placed on the pulleys of two pulley assemblies arranged at intervals, and the pulleys are locked by adjusting the height of the two pulley assemblies to ensure the tension level of the pull rope. In addition, a detection member is provided on the pull rope. In this embodiment, the detection member is a tension sensor, which is provided on the rope end of the pull rope between the two pulleys, and the tension sensor is used to detect the tension on the pull rope. The other end of the pull rope is hung with a first load after passing around the pulley. By adjusting the weight of the first load, the second detection member can be dragged from static to sliding. Then the sliding friction coefficient between the first detection member and the second detection member can be calculated.

[0089] Specifically, the sliding friction coefficient μ between the first detection member and the second detection member is calculated as follows: H , calculated by the following formula:

[0090]

[0091] Among them, μ H represents the sliding friction coefficient μ between the first detection member and the second detection member H ;

[0092] G represents the minimum first load value of the second detection member from stationary to sliding;

[0093] F represents the positive pressure generated between the first detection member and the second detection member;

[0094] g represents the deadweight of the second testing member.

[0095] like Figure 7 As shown, an embodiment of the present invention further provides a friction coefficient measurement method, which is used to detect the rotational friction coefficient of the third detection member. Specifically, the rotational friction coefficient of the third detection member is measured by the friction coefficient detection device provided in the embodiment of the present invention. The friction coefficient measurement method includes the following steps:

[0096] S210, connecting the third detection member to the rotating support frame, winding the end of the pull rope away from the first load around the third detection member, and hanging the second load at the end of the pull rope facing the third detection member;

[0097] S220, adjusting the weight of the first load to rotate the third detection member;

[0098] S230, calculate and obtain the rotational friction coefficient μ of the third detection member T .

[0099] The above steps are used to detect the rotational friction coefficient of the third detection member. Specifically, the rotational friction coefficient μ T The measurement is as follows. The third detection member is mounted on the spindle 620 of the rotating support frame, a weight G0 is hung on the third detection member, and the height of the spindle 620 on the spindle mounting frame 610 is adjusted, and the height of the two pulleys on the pulley bracket is adjusted so that the highest point of the third detection member is at the same height as the highest point of the two pulleys, as shown in FIG. Figure 4 Wrap one end of the pull rope around the outer circle of the third detection member for several turns and pass it around two pulleys at the same time, making sure that the pull rope is horizontal. The other end of the pull rope is hung with the first load after passing it around the pulleys. By adjusting the first load, the third detection member can be made to rotate from static to relative.

[0100] Specifically, the rotational friction coefficient μ of the third detection member is calculated as follows: T , calculated by the following formula:

[0101]

[0102] Among them, μ T represents the rotational friction coefficient of the third testing member;

[0103] G represents the weight of the first load suspended at the end of the pull rope;

[0104] r2 represents the effective radius of the pulley;

[0105] G0 represents the weight of the second load;

[0106] R represents the radius of the sliding surface of the third detection member.

[0107] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A friction coefficient detection device, characterized in that: The friction coefficient detection device comprises: Sliding platform; A limiting member, two of which are detachably arranged on the sliding platform, and are used to limit the first detection member; A pulley assembly is provided at one end of the sliding platform; A traction member is constructed with a receiving groove for receiving the second detection member, one end of the traction member is connected to the first load through a pull rope, and the pull rope is wound around the pulley assembly; the second detection member can slide relative to the first detection member along with the traction member under the action of the first load; A rotating support frame, wherein the rotating support frame is used to support the third detection member, one end of a pull rope is wound around the third detection member, and the other end is connected to the first load, the pull rope cooperates with the pulley assembly, and the third detection member can rotate relative to the rotating support frame under the action of the first load.

2. The friction coefficient detection device according to claim 1, characterized in that: The sliding platform has two side surfaces arranged opposite to each other along a first direction, and guide rails are arranged on the two side surfaces; the friction coefficient detection device also includes: A rolling member is rotatably disposed on the guide rail, and the rolling member is elastically connected to the traction member.

3. The friction coefficient detection device according to claim 2, characterized in that: The friction coefficient detection device also includes a pressure block, which is used to be placed on the second detection member to apply positive pressure to the second detection member. Both the pressure block and the rolling member are provided with hanging ears, and the two ends of the elastic member are respectively connected to the hanging ears of the pressure block and the rolling member.

4. The friction coefficient detection device according to claim 1, characterized in that: The traction member is constructed by connecting a plurality of connecting plates end to end, and the plurality of connecting plates enclose and define a through slot, which is the accommodating slot.

5. The friction coefficient detection device according to claim 1, characterized in that: The limiting member is configured as a magnetic seat, and the sliding platform is configured as a cast iron material.

6. The friction coefficient detection device according to claim 1, characterized in that: The friction coefficient detection device also includes a mounting base, and the pulley assembly includes: A pulley bracket, fixedly connected to the mounting base; A pulley is rotatably mounted on the pulley bracket, and the pull rope is wound around the pulley; Wherein, the height of the pulley on the pulley bracket is adjustable so that the portion of the pull rope between the traction member and the pulley is in a horizontal direction.

7. The friction coefficient detection device according to claim 6, characterized in that: A mounting portion is provided at one end of the pulley bracket, and the mounting portion is constructed as a plate-like structure. A through guide groove is provided on the mounting portion, and the rotating shaft of the pulley is arranged in the guide groove. The position of the rotating shaft in the guide groove is adjustable.

8. The friction coefficient detection device according to claim 1, characterized in that: The pull rope is provided with a measuring piece, and the measuring piece is used to detect the tension applied to the pull rope.

9. The friction coefficient detection device according to any one of claims 1 to 8, characterized in that: The rotating support frame includes: A mandrel mounting frame is fixedly connected to the mounting base, and a mounting groove is configured on the mandrel mounting frame; A mandrel, one end of which is disposed in the mounting groove and fixed to the mandrel mounting frame by a fastener; Wherein, the position of the core shaft in the mounting groove is adjustable, and the third detection member is used to be rotatably connected to the core shaft.

10. A friction coefficient measurement method, the friction coefficient measurement method is used to detect the sliding friction coefficient of a first detection member and a second detection member, characterized in that: The friction coefficient measurement method comprises the following steps: Placing the first detection member on the sliding platform and fixing the first detection member by two stoppers; Fixing the second detection member in the receiving groove of the traction member and placing it on the first detection member; One end of the pull rope is connected to the traction member, and the other end of the pull rope is connected to the first load, the pull rope is wound around the pulley of the pulley assembly, and a measuring member for detecting the tension applied to the pull rope is provided on the pull rope; placing a pressure block on the second detection member, and adjusting the weight of the first load so that the second detection member slides relative to the first detection member along with the traction member; The sliding friction coefficient μ between the first detection member and the second detection member is calculated. H .

11. The friction coefficient measurement method according to claim 10, characterized in that: The sliding friction coefficient μ between the first detection member and the second detection member is obtained by calculation. H , calculated by the following formula: Among them, μ H represents the sliding friction coefficient μ between the first detection member and the second detection member H ; G represents the minimum first load value of the second detection member from stationary to sliding; F represents the positive pressure generated between the first detection member and the second detection member; g represents the deadweight of the second detection member.

12. A friction coefficient measurement method, the friction coefficient measurement method is used to detect the rotational friction coefficient of a third detection member, characterized in that: The friction coefficient measurement method comprises the following steps: Connecting the third detection member to the rotating support frame, winding the end of the pull rope away from the first load around the third detection member, and hanging a second load at the end of the pull rope facing the third detection member; adjusting the weight of the first load to rotate the third detection member; The rotational friction coefficient μ of the third detection member is calculated T .

13. The friction coefficient measurement method according to claim 12, characterized in that: The calculation obtains the rotational friction coefficient μ of the third detection member T , calculated by the following formula: Among them, μ T represents the rotational friction coefficient of the third detection member; G represents the weight of the first load suspended at the end of the pull rope; r2 represents the effective radius of the pulley; G0 represents the weight of the second load; R represents the radius of the sliding surface of the third detection member.

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