Friction coefficient detection device and equipment

Abstract

The present application relates to the technical field of friction coefficient detection, and specifically to a friction coefficient detection device and equipment, the device comprising a controller, a moving mechanism, a first clamping mechanism and a second clamping mechanism; the first clamping mechanism comprises a first clamping assembly for clamping a workpiece; the moving mechanism can apply a force in a first direction to the workpiece, and collect a first force parameter received by the workpiece along the first direction; the second clamping mechanism can clamp a second clamping assembly of the first clamping assembly, can drive the workpiece to reciprocate along a second direction, and collect a second force parameter received by the workpiece along the second direction; the controller is used to obtain the first force parameter and the second force parameter, and calculate the friction coefficient based on the first force parameter and the second force parameter; the present application realizes rapid detection of the friction coefficient of the workpiece, and by changing the movement speed of the second clamping mechanism, realizes the detection of the friction coefficient under various working conditions, and also improves the detection accuracy of the friction coefficient.

Description

Technical Field

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

[0002] Friction is one of the key factors affecting industrial production. During the production process, friction can cause uneven deformation, wear or slipping of products, which will have a great impact on product performance and life. Therefore, the friction problem is one of the issues to be solved in engineering applications. The dynamic and static friction coefficient equipment is one of the important tests for testing the dynamic and static friction coefficient between different materials.

[0003] The existing friction coefficient measurement equipment is cumbersome and troublesome to operate. The manual labor takes up a lot of time in the measurement process, and it is difficult to obtain multiple sets of test data in one operation. Therefore, the measurement data is not accurate and the measurement efficiency is low.

[0004] Based on the shortcomings of the existing technology, it is urgent to develop a friction coefficient detection device and equipment to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a friction coefficient detection device, which can quickly detect the friction coefficient of a workpiece; and by changing the movement speed of the second clamping mechanism, the friction coefficient can be detected under various working conditions; at the same time, the workpiece is driven to reciprocate by the first clamping mechanism and the second clamping mechanism to obtain multiple sets of detection data, thereby improving the detection accuracy of the friction coefficient.

[0006] The present application discloses a friction coefficient detection device, comprising a controller, a moving mechanism, a first clamping mechanism and a second clamping mechanism;

[0007] The first clamping mechanism includes a first clamping assembly for clamping a workpiece;

[0008] The moving mechanism comprises a first driving assembly, a first sensor and a mounting assembly; the mounting assembly can be sleeved on a workpiece, the first driving assembly is used to drive the mounting assembly to move, so that the mounting assembly can apply a force in a first direction to the workpiece; the first sensor is used to collect a first force parameter applied to the workpiece along the first direction;

[0009] The second clamping mechanism includes a second driving assembly, a second sensor, and a second clamping assembly for clamping the first clamping assembly; the second driving assembly is used to drive the second clamping assembly to reciprocate along a second direction, thereby driving the workpiece to reciprocate along the second direction relative to the mounting assembly; the second sensor is used to collect a second force parameter applied to the workpiece along the second direction;

[0010] The controller is used to obtain the first force parameter and the second force parameter, and calculate the friction coefficient based on the first force parameter and the second force parameter.

[0011] Further, it also includes a support assembly;

[0012] The first clamping mechanism, the second clamping mechanism and the moving mechanism are arranged on the supporting assembly, and the mounting assembly is arranged in the clamping space of the first clamping assembly.

[0013] Further, the moving mechanism also includes a first mounting bracket and a floating assembly capable of reciprocating along the first direction;

[0014] The first driving assembly, the first sensor, the mounting assembly and the floating assembly are all arranged on the first mounting bracket;

[0015] The first end of the floating component is drivingly connected to the first driving component, and the first sensor is arranged between the mounting component and the second end of the floating component; the first driving component is used to drive the mounting component and the floating component to move relative to the first mounting bracket.

[0016] Further, the second clamping mechanism also includes a first guide rail assembly, a second mounting bracket and a leveling assembly;

[0017] The leveling assembly, the second driving assembly, the second sensor, the first guide rail assembly, and the second clamping assembly are all arranged on the second mounting bracket;

[0018] The first guide rail assembly, the second sensor and the second clamping assembly are connected in sequence; the first guide rail assembly is arranged along the second direction, the second drive assembly is drivingly connected to the first guide rail assembly, and the second drive assembly drives the first guide rail assembly to reciprocate, thereby driving the second clamping assembly to reciprocate along the second direction.

[0019] Furthermore, the second clamping mechanism further includes a displacement sensor;

[0020] The displacement sensor is arranged on the second mounting bracket, and the displacement sensor is used to obtain the moving distance of the second clamping assembly.

[0021] Further, the second clamping assembly includes a connecting member and a third mounting bracket;

[0022] The second sensor and the connecting member are both arranged on the third mounting bracket;

[0023] The first end of the second sensor is detachably connected to the third mounting bracket, and the second end of the second sensor is detachably connected to the first guide rail assembly, so that the force deformation direction of the second sensor is the same as the second direction;

[0024] The first clamping assembly is fixedly connected to the mounting bracket via the connecting piece, and the first clamping assembly moves in coordination with the third mounting bracket.

[0025] Further, the first guide rail assembly includes a first air-floating shaft, a first bearing sleeve and an air filter device for filtering air;

[0026] The first bearing sleeve is mounted on the first air-floating shaft, and the first bearing sleeve and the first air-floating shaft are connected to form a first space, and the air outlet of the air filter device and the first space are used to pass air into the first space;

[0027] One end of the first air-floating shaft is drivingly connected to the second driving assembly. The first air-floating shaft moves relative to the first bearing sleeve under the drive of the second driving assembly, thereby driving the second clamping assembly to reciprocate along the axis direction of the first air-floating shaft.

[0028] Further, the first clamping mechanism further includes a driving assembly, a connecting assembly, a second guide rail assembly, and an elastic assembly moving along the first direction;

[0029] The elastic component, the driving component and the second guide rail component are sequentially arranged on the connecting component; the first end of the second guide rail component is detachably connected to the first clamping component, the second end of the second guide rail component is connected to the first end of the connecting component, the second end of the connecting component is detachably connected to the elastic component, and the elastic component is drivingly connected to the driving end of the driving component;

[0030] The elastic component can move along the first direction under the drive of the driving component to adjust the position of the first clamping component in the first direction.

[0031] Furthermore, the second guide rail assembly includes a second air-floating shaft and a second bearing sleeve that are relatively slidably connected;

[0032] The second bearing sleeve is mounted on the second air-floating shaft, and the second bearing sleeve and the second air-floating shaft are connected to form a second space, and the air outlet of the air filter device and the second space are used to pass air into the second space;

[0033] The second air-floating shaft is detachably connected to the first clamping assembly, and the first clamping assembly is driven by the second clamping assembly to reciprocate along the axial direction of the second air-floating shaft.

[0034] On the other hand, the present application also protects a friction coefficient detection device, including a display and the friction coefficient detection device as described above;

[0035] The friction coefficient detection device is electrically connected to the display; the display is used to display the friction coefficient.

[0036] Implementing the embodiments of the present application has the following beneficial effects:

[0037] The present application realizes the simultaneous application of force parameters in the first direction and the second direction to the workpiece by setting up a moving mechanism, a first clamping mechanism and a second clamping mechanism, and respectively collects the force parameters in the first direction and the second direction through the first sensor and the second sensor, so as to realize rapid detection of the friction coefficient of the workpiece; and by changing the movement speed of the second clamping mechanism, detection of the friction coefficient under various working conditions is realized; at the same time, the workpiece is driven to reciprocate by the first clamping mechanism and the second clamping mechanism to obtain multiple sets of detection data, thereby improving the detection accuracy of the friction coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and a person of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

[0039] Figure 1 is a structural diagram of the friction coefficient detection device described in this embodiment;

[0040] Figure 2 is a structural diagram of the mobile mechanism described in this embodiment;

[0041] Figure 3 This is a structural diagram of the first clamping mechanism of this embodiment;

[0042] Figure 4 for Figure 1 A partial enlarged view of

[0043] Figure 5 This is a structural diagram of the second clamping mechanism of this embodiment;

[0044] Figure 6 This is a structural diagram of the second clamping assembly and the second sensor after being connected in this embodiment;

[0045] Figure 7This is a structural diagram after the workpiece described in this embodiment is connected to the second mounting member.

[0046] Among them, the reference numerals in the figure correspond to:

[0047] 1-moving mechanism; 2-first clamping mechanism; 3-second clamping mechanism; 4-supporting assembly; 5-workpiece; 11-first driving assembly; 12-first sensor; 13-mounting assembly; 14-first mounting bracket; 15-floating assembly; 21-first clamping assembly; 22-driving assembly; 23-connecting assembly; 24-second guide rail assembly; 25-elastic assembly; 31-second driving assembly; 32-second sensor; 33-first guide rail assembly; 34-second clamping assembly; 35-second mounting bracket; 36- Leveling assembly; 37-displacement sensor; 38-limiting assembly; 41-first support member; 42-second support member; 43-third support member; 111-first driving member; 112-second driving member; 113-third driving member; 131-first mounting member; 132-second mounting member; 241-second air-floating shaft; 242-second bearing sleeve; 331-first air-floating shaft; 332-first bearing sleeve; 333-air filter device; 341-connecting member; 342-third mounting bracket; 1321-mounting hole. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] The existing technology has the following disadvantages: the existing friction coefficient measurement equipment is cumbersome and troublesome to operate, the manual labor takes up a lot of time in the measurement process, and it is difficult to obtain multiple sets of test data in one operation, so the measurement data is not accurate and the measurement efficiency is low.

[0051] In view of the defects of the prior art, the present application realizes the simultaneous application of force parameters in the first direction and the second direction to the workpiece by setting up a moving mechanism, a first clamping mechanism and a second clamping mechanism, and respectively collects the force parameters in the first direction and the second direction through the first sensor and the second sensor, so as to realize rapid detection of the friction coefficient of the workpiece; and by changing the movement speed of the second clamping mechanism, the detection of the friction coefficient under various working conditions is realized; at the same time, the workpiece is driven to reciprocate by the first clamping mechanism and the second clamping mechanism to obtain multiple sets of detection data, thereby improving the detection accuracy of the friction coefficient.

[0052] Example 1

[0053] See attached Figure 1 to Figure 7 , this embodiment provides a friction coefficient detection device, including a controller, a moving mechanism 1, a first clamping mechanism 2 and a second clamping mechanism 3; the first clamping mechanism 2 includes a first clamping assembly 21 for clamping a workpiece 5; the moving mechanism 1 includes a first driving assembly 11, a first sensor 12 and a mounting assembly 13; the mounting assembly 13 can be sleeved on the workpiece 5, and the first driving assembly 11 is used to drive the mounting assembly 13 to move, so that the mounting assembly 13 can apply a force in a first direction to the workpiece 5; the first sensor 12 is used to collect a first force parameter applied to the workpiece 5 along the first direction; the second clamping mechanism 3 includes a second driving assembly 31, a second sensor 32 and a second clamping assembly 34 for clamping the first clamping assembly 21; the second driving assembly 31 is used to drive the second clamping assembly 34 to reciprocate along the second direction, thereby driving the workpiece 5 to reciprocate along the second direction relative to the mounting assembly 13; the second sensor 32 is used to collect a second force parameter applied to the workpiece 5 along the second direction; the controller is used to obtain the first force parameter and the second force parameter, and calculate the friction coefficient based on the first force parameter and the second force parameter.

[0054] It should be noted that: in this embodiment, by setting up a moving mechanism 1, a first clamping mechanism 2 and a second clamping mechanism 3 to cooperate, it is possible to simultaneously apply force parameters in the first direction and the second direction to the workpiece 5, and the force parameters in the first direction and the second direction are respectively collected by the first sensor 12 and the second sensor 32 to achieve rapid detection of the friction coefficient of the workpiece; and by changing the movement speed of the second clamping mechanism, the detection of the friction coefficient under various working conditions is achieved; at the same time, the first clamping mechanism 2 and the second clamping mechanism 3 are used to drive the workpiece 5 to reciprocate, so as to obtain multiple sets of detection data and improve the detection accuracy of the friction coefficient.

[0055] It is further necessary to explain that the first direction is perpendicular to the second direction, the first direction is the gravity direction of the mounting assembly 13 , and the second direction is the axial direction of the workpiece 5 .

[0056] It should also be noted that: the second clamping mechanism 3 includes a displacement operation mode and a torque operation mode. The displacement operation mode is to change the moving distance of the second clamping component 34 through the second drive component 31, and the torque operation mode is to change the force applied to the second clamping component 34 through the second drive component 31; since the second clamping mechanism 3 includes the above two operation modes, the static friction coefficient and the dynamic friction coefficient of the workpiece 5 can be detected, and the measurement of the dynamic friction coefficient and the static friction coefficient can be achieved by using only the friction coefficient detection device of this embodiment, thereby improving the friction coefficient detection efficiency and its adaptability.

[0057] Specifically, when the second clamping mechanism 3 is in the displacement operation mode, the dynamic friction coefficient at this time is obtained by controlling the second driving component 31 to move a first distance at a first speed, thereby realizing the detection of the dynamic friction coefficient of the workpiece 5 .

[0058] More specifically, the dynamic friction coefficient at the first speed is obtained by controlling the second drive component 31 to move a first distance at a first speed, and the dynamic friction coefficient at the second speed is obtained by controlling the second drive component 31 to move a first distance at a second speed; and the final dynamic friction coefficient is calculated based on the dynamic friction coefficients at the first speed and the second speed. The dynamic friction coefficient under various working conditions can be obtained by changing the speed, which significantly improves the detection accuracy of the dynamic friction coefficient.

[0059] Furthermore, the first speed and the second speed are not equal, and the first speed or the second speed may be 0.1 mm / s, 0.5 mm / s or 1 mm / s, etc., and the first distance may be 5 mm, 8 mm or 10 mm.

[0060] Specifically, when the second clamping mechanism 3 is in the torque operation mode, the static friction coefficient is obtained by controlling the second driving component 31 to change the force applied to the second clamping component 34, that is, the second driving component 31 increases the torque by 0.1N / S; that is, the force applied to the workpiece 5 at the moment of movement is obtained, and the static friction coefficient of the workpiece 5 is detected at this time.

[0061] It should be noted that when a test is performed in this embodiment, the operating mode of the second clamping mechanism 3 can be switched, that is, the displacement operating mode and the torque operating mode can be operated in time-sharing mode in one test, which can obtain multiple sets of static friction and dynamic friction, and improve the accuracy of subsequent calculation of the dynamic friction coefficient and the static friction coefficient.

[0062] Specifically, the calculation formula for the dynamic friction coefficient is: u=F2 / F1; the calculation formula for the static friction coefficient is: u=F3 / F1; wherein, F1=G+Fx; G is the gravity of the mounting assembly 13, Fx is the pressure value obtained by the first sensor 12, F2 is the pressure value obtained by the second sensor when the workpiece 5 is moving, and F3 is the pressure value obtained by the second sensor when the workpiece 5 is stationary.

[0063] In some possible embodiments, a support assembly 4 is further included; the first clamping mechanism 2 , the second clamping mechanism 3 and the moving mechanism 1 are arranged on the support assembly 4 , and the mounting assembly 13 is arranged in the clamping space of the first clamping assembly 21 .

[0064] Specifically, the clamping space of the first clamping component 21 is used to clamp the workpiece 5 and accommodate the workpiece 5. The installation component 13 is arranged in the clamping space, which can ensure that when the first clamping component 21 drives the workpiece to move back and forth along the second direction, the installation component 13 can apply a force in the first direction to the workpiece, so that the workpiece 5 is simultaneously subjected to the forces in the first direction and the second direction, and then the friction coefficient of the workpiece 5 can be calculated by the force parameters in the first direction and the force parameters in the second direction, thereby realizing rapid detection of the friction coefficient of the workpiece 5 and greatly reducing the friction coefficient detection time.

[0065] In some possible embodiments, the mobile mechanism 1 also includes a first mounting bracket 14 and a floating component 15 capable of reciprocating along a first direction; the first driving component 11, the first sensor 12, the mounting component 13 and the floating component 15 are all arranged on the first mounting bracket 14; the first end of the floating component 15 is drivingly connected to the first driving component 11, and the first sensor 12 is arranged between the second ends of the mounting component 13 and the floating component 15; the first driving component 11 is used to drive the mounting component 13 and the floating component 15 to move relative to the first mounting bracket 14.

[0066] In this embodiment, the first mounting bracket 14 includes a first support member 141, a second support member 142 and a third support member 143; the second support member 142 is provided with a slide rail and a clamping member, and the third support member 143 is slidably connected to the slide rail so that the third support member 143 can move along the slide rail on the second support member 142; the clamping member can be clamped with the third support member 143 so that the third support member 143 can be relatively fixed relative to the second support member 142; the second support member 142 is arranged on the first support member 141, and the arrangement direction of the second support member 142 is the same as the arrangement direction of the slide rail.

[0067] Specifically, the first driving assembly 11 includes a first driving member 111, a second driving member 112 and a third driving member 113; the first driving member 111, the second driving member 112 and the third driving member 113 are all arranged on the first mounting bracket 14, the first driving member 111 and the second driving member 112 are both detachably connected to the first support member 141, and the first driving member 111 and the second driving member 112 are arranged on the same side of the first support member 141, the first driving member 111 is used to drive the first mounting bracket 14 to reciprocate along the first direction, and the second driving member 112 is used to level the first support member 141 in the second direction and the third direction; wherein the third direction is a direction perpendicular to the first direction and the second direction; the third driving member 113 is arranged on the third direction On the support member 143, the first end of the third driving member 113 is connected to the first end of the floating component 15, and the second end of the third driving member 113 is detachably connected to the third support member 143. The third driving member 113 is used to level the floating component 15 and the mounting component 13 as a whole in the second direction and the third direction, so that the mounting component 13 is in a horizontal state, ensuring that the mounting component 13 can be mounted on the workpiece 5 in a horizontal state, so that the axes of the two coincide, and avoid the two from generating forces other than friction, which affects the final detection of the friction coefficient of the workpiece 5; the second driving member 112 and the third driving member 113 are used to level the mounting component 13 respectively, so as to achieve sequential leveling, improve the leveling accuracy, and thereby ensure the accuracy of the friction coefficient of the workpiece 5.

[0068] Furthermore, the specific structures of the second driving member 112 and the third driving member 113 are not limited, as long as the second driving member 112 can level the first supporting member 141 and the third driving member 113 can level the floating assembly and the mounting assembly 13 as a whole.

[0069] Specifically, the mounting component 13 includes a first mounting component 131 and a second mounting component 132 having a mounting hole 1321; the first end of the first mounting component 131 is detachably connected to the second mounting component 132, and the second end of the first mounting component 131 is connected to the second end of the first sensor 12; the second end of the floating component 15 is connected to the first end of the first sensor 12, and the floating component 15 can drive the mounting component 13 to move along the first direction; by providing a detachable first mounting component 131 and a second mounting component 132, when the second mounting component 132 is damaged, only the second mounting component 132 needs to be replaced, thereby avoiding overall disassembly and increasing the overall cost.

[0070] Furthermore, the workpiece 5 is disposed in the mounting hole 1321 , and the axis of the workpiece 5 coincides with the axis of the mounting hole 1321 .

[0071] In some possible embodiments, the second clamping mechanism 3 also includes a first guide rail assembly 33, a second mounting bracket 35 and a leveling assembly 36; the leveling assembly 36, the second drive assembly 31, the second sensor 32, the first guide rail assembly 33, and the second clamping assembly 34 are all arranged on the second mounting bracket 35; the first guide rail assembly 33, the second sensor 32 and the second clamping assembly 34 are connected in sequence; the first guide rail assembly 33 is arranged along the second direction, the second drive assembly 31 is drivingly connected to the first guide rail assembly 33, and the second drive assembly 31 drives the first guide rail assembly 33 to reciprocate, thereby driving the second clamping assembly 34 to reciprocate along the second direction.

[0072] Specifically, the leveling assembly 36 includes a connecting plate, a first adjusting bolt, a second adjusting bolt and a third adjusting bolt. The first ends of the first adjusting bolt, the second adjusting bolt and the third adjusting bolt are detachably connected to the connecting plate, and the second ends of the first adjusting bolt, the second adjusting bolt and the third adjusting bolt are threadedly connected to the second mounting bracket 35. The distance between the second mounting bracket 35 and the connecting plate is adjusted by adjusting the first adjusting bolt, the second adjusting bolt and the third adjusting bolt respectively, so as to level the second clamping assembly 34 arranged on the second mounting bracket 35 to make it in a horizontal state. The second clamping assembly 34 is ensured to ensure that the first clamping assembly 21 is in a horizontal state, so that the workpiece 5 clamped by the first clamping assembly 21 is in a horizontal state, so as to ensure that the axis of the workpiece 5 coincides with the axis of the mounting assembly 13, so as to avoid the two from generating forces other than friction, thereby ensuring the detection accuracy of the friction coefficient of the workpiece 5.

[0073] In some possible embodiments, the second clamping mechanism 3 further includes a displacement sensor 37 ; the displacement sensor 37 is disposed on the second mounting bracket 35 , and the displacement sensor 37 is used to obtain a moving distance of the second clamping assembly 34 .

[0074] Specifically, the displacement sensor 37 is a grating line displacement sensor, which includes a main grating, a sub-grating, a photoelectric conversion device, an amplifier and a grating digital display. When the main grating and the sub-grating in a pair of grating scales are relatively displaced, the displacement sensor 37 produces a regular black and white striped pattern under the combined action of light interference and diffraction. After the photoelectric device converts the black and white stripes into a sinusoidal electrical signal, which is then amplified by an amplifier and shaped by a shaping circuit to obtain two sinusoidal waves or square waves with a phase difference of 90°, which are sent to the grating digital display for counting and display, thereby realizing displacement detection; the displacement sensor 37 is used to detect the moving distance output by the second drive component 31, so that the displacement sensor 37 can obtain the moving distance of the second clamping component 34, and at the same time, the moving distance output by the second drive component 31 obtained by the displacement sensor 37 is compared with the moving distance obtained by the displacement sensor 37 to realize the closed-loop setting of the moving distance detection, thereby ensuring the accuracy of the second drive component 31 driving the second clamping component 34 to move, thereby ensuring the precise control of the force applied to the workpiece 5 in the horizontal direction, and ensuring the accuracy of the friction coefficient detection of the workpiece 5.

[0075] Specifically, the second driving assembly 31 includes a voice coil motor, and the accuracy of the voice coil motor can reach 0.1 um. Through the cooperation between the voice coil motor and the displacement sensor 37, micron-level repeatable positioning accuracy can be achieved, thereby ensuring the accuracy of the friction coefficient detection of the workpiece 5.

[0076] Furthermore, the controller obtains the moving distance obtained by the displacement sensor 37 and the actual moving distance of the voice coil motor in real time, and compares the two moving distances. When the two moving distances are not equal or the difference is greater than the set value, the voice coil motor is stopped, and the corresponding mechanism is inspected and replaced to ensure that the voice coil motor always accurately drives the second clamping assembly 34 to operate, thereby improving the friction coefficient detection accuracy; when the two moving distances are the same, it means that the voice coil motor accurately drives the second clamping assembly 34 to operate, which ensures the friction coefficient detection accuracy of the workpiece 5.

[0077] In some possible embodiments, the second clamping mechanism 3 also includes at least one limiting component 38, which is disposed on the second mounting bracket 35. The limiting component 38 can abut against the second clamping component 34 to limit the second clamping component 34 so that it can only move within a certain range.

[0078] In some possible embodiments, the second clamping assembly 34 includes a connecting piece 341 and a third mounting bracket 342; the second sensor 32 and the connecting piece 341 are both arranged on the third mounting bracket 342; the first end of the second sensor 32 is detachably connected to the third mounting bracket 342, and the second end of the second sensor 32 is detachably connected to the first guide rail assembly 33, so that the force deformation direction of the second sensor 32 is the same as the second direction; the first clamping assembly 21 is fixedly connected to the mounting bracket through the connecting piece 341, and the first clamping assembly 21 moves in coordination with the third mounting bracket 342.

[0079] Specifically, the third mounting bracket 342 includes a fixed portion and two connecting portions, each connecting portion is provided with a connecting piece 341, the two connecting portions are symmetrically arranged on both sides of the fixed portion, and the connecting portion is detachably connected to the fixed portion, so that by replacing the fixing portions of different lengths, the third mounting bracket 342 can clamp the first clamping components 21 of different widths, thereby improving the adaptability of the second clamping component 34.

[0080] In other possible embodiments, the third mounting bracket 342 includes a locking portion, a telescopic portion and two connecting portions, the locking portion is arranged on the telescopic portion; the two connecting portions are symmetrically arranged on both sides of the telescopic portion; and a connecting piece 341 is arranged on each connecting portion, so that after the two connecting portions are connected to the telescopic portion, a second clamping component 34 that clamps the first clamping component 21 can be formed.

[0081] Specifically, the telescopic part can be telescoped along its arrangement direction to drive the connecting parts on both sides to move, thereby adjusting the distance between the two connecting parts. By adjusting the distance between the two connecting parts, the second clamping component 34 in this embodiment can be adapted to the first clamping components 21 of different widths, thereby improving the adaptability of the second clamping component 34.

[0082] Specifically, the locking portion can lock the telescopic portion so that its length cannot be adjusted, thereby achieving relative fixed positions of the two connecting portions, and further achieving stability when the second clamping assembly 34 is clamped, which can also improve the friction coefficient detection accuracy of the workpiece 5 to a certain extent.

[0083] In some possible embodiments, the telescopic portion may be a telescopic rod, a plurality of locking holes are provided on the telescopic rod, and the locking portion is provided in the locking holes to limit the telescopic rod.

[0084] It should be noted that in this embodiment, the structures of the locking portion and the telescopic portion are not set, as long as the telescopic portion can be telescoped and the locking portion can lock the telescopic portion.

[0085] In some possible embodiments, the first guide rail assembly 33 includes a first air-floating shaft 331, a first bearing sleeve 332 and an air filter device 333 for filtering air; the first bearing sleeve 332 is sleeved on the first air-floating shaft 331, and the first bearing sleeve 332 is connected to the first air-floating shaft 331 to form a first space, and the air outlet of the air filter device 333 is connected to the first space, and is used to pass air into the first space; one end of the first air-floating shaft 331 is drivingly connected to the second driving assembly 31, and the first air-floating shaft 331 is driven by the second driving assembly 31 to move relative to the first bearing sleeve 332, thereby driving the second clamping assembly 34 to reciprocate along the axial direction of the first air-floating shaft 331.

[0086] Specifically, an air inlet pipe is provided on the first bearing sleeve 332, and the air inlet of the air inlet pipe is connected to the air outlet of the air filter device 333. The air filter device 333 is used to pass gas into the first bearing sleeve 332, so that the first air floating shaft 331 and the first bearing sleeve 332 are not in direct contact, thereby reducing the friction between the two. This eliminates the friction generated by the friction coefficient detection device itself in this embodiment to a certain extent, thereby improving the detection accuracy of the friction coefficient of the workpiece 5.

[0087] Specifically, the air supply pressure of the air filter device 333 is 4 bar, which ensures that the air film generated by the gas in the air bearing is constant, and the thickness of the air film is about 4 um, which ensures that the air bearing and the air bearing are not in direct contact.

[0088] It should be noted that: in the present embodiment, the first guide rail assembly 33 is the first air floating shaft 331 , and its specific structure is not limited as long as the first air floating shaft 331 is not in direct contact with the first bearing sleeve 332 .

[0089] In some possible embodiments, the first clamping mechanism 2 also includes a driving component 22, a connecting component 23, a second guide rail component 24 and an elastic component 25 that moves along the first direction; the elastic component 25, the driving component 22 and the second guide rail component 24 are sequentially arranged on the connecting component 23; the first end of the second guide rail component 24 is detachably connected to the first clamping component 21, the second end of the second guide rail component 24 is connected to the first end of the connecting component 23, the second end of the connecting component 23 is detachably connected to the elastic component 25, and the elastic component 25 is drivingly connected to the driving end of the driving component 22; the elastic component 25 can move along the first direction under the drive of the driving component 22 to adjust the position of the first clamping component 21 in the first direction.

[0090] Specifically, the elastic component 25 includes an elastic member, a first fixing member and a second fixing member; the first fixing member and the second fixing member are respectively arranged at two ends of the elastic member, and the distance between the first fixing member and the second fixing member is adjusted by adjusting the elastic member.

[0091] Specifically, the driving end of the driving component 22 is connected to the second fixing member, and the driving component 22 can drive the elastic member to deform along its axial direction, thereby adjusting the vertical distance between the first clamping component 21 and the second clamping component 34 to ensure the accuracy of the friction coefficient detection of the workpiece 5.

[0092] Furthermore, the driving assembly 22 includes a cylinder, the connecting assembly 23 is a connecting rod, and the elastic member is a spring.

[0093] In some possible embodiments, the second guide rail assembly 24 includes a second air-floating shaft 241 and a second bearing sleeve 242 that are relatively slidably connected; the second bearing sleeve 242 is sleeved on the second air-floating shaft 241, and the second bearing sleeve 242 is connected to the second air-floating shaft 241 to form a second space, and the air outlet of the air filter device 333 and the second space are used to pass air into the second space; the second air-floating shaft 241 is detachably connected to the first clamping assembly 21, and the first clamping assembly 21 reciprocates along the axial direction of the second air-floating shaft 241 under the drive of the second clamping assembly 34.

[0094] Specifically, an air inlet pipe is provided on the second bearing sleeve 242, and the air inlet of the air inlet pipe is connected to the air outlet of the air filter device 333. The air filter device 333 is used to pass gas into the second bearing sleeve 242, so that the second air floating shaft 241 and the second bearing sleeve 242 are not in direct contact, thereby reducing the friction between the two. This also eliminates the friction generated by the friction coefficient detection device itself in this embodiment to a certain extent, thereby improving the detection accuracy of the friction coefficient of the workpiece 5.

[0095] It should be noted that in the present embodiment, the second guide rail assembly 24 is an air bearing, and its specific structure is not limited as long as the second air bearing shaft 241 and the second bearing sleeve 242 are not in direct contact with each other.

[0096] The friction coefficient detection process of the friction coefficient detection device is as follows: when it is necessary to detect the friction coefficient of the workpiece 5, the second clamping assembly 34 is in a horizontal state and the axis of the mounting hole 1321 is in a horizontal state by leveling the moving mechanism 1 and the second clamping mechanism 3 respectively; the workpiece 5 is passed through the mounting hole 1321, and the workpiece 5 is clamped on the first clamping assembly 21, and the mounting assembly 13 is controlled to apply a force along the first direction to the workpiece 5; the second clamping assembly 34 is controlled to move along the second direction or have a movement trend, so that a force in the second direction is generated between the workpiece 5 and the mounting assembly 13, and the controller can obtain the first force parameter in the first direction and the second force parameter in the second direction, and calculate the two to obtain the friction coefficient of the workpiece 5.

[0097] On the other hand, the present application also protects a friction coefficient detection device, including a display and the friction coefficient detection device as described above; the friction coefficient detection device is electrically connected to the display; and the display is used to display the friction coefficient.

[0098] It should be noted that: the detection equipment includes the above-mentioned friction coefficient detection device, which can simultaneously apply force parameters in the first direction and the second direction to the workpiece 5 by setting up a moving mechanism 1, a first clamping mechanism 2 and a second clamping mechanism 3, and respectively collect the force parameters in the first direction and the second direction through the first sensor 12 and the second sensor 32, so as to realize rapid detection of the friction coefficient of the workpiece; and by changing the movement speed of the second clamping mechanism, the friction coefficient can be detected under various working conditions; at the same time, the workpiece 5 is driven to reciprocate by the first clamping mechanism 2 and the second clamping mechanism 3 to obtain multiple sets of detection data, thereby improving the detection accuracy of the friction coefficient.

[0099] Although the present application has been described through preferred embodiments, the present application is not limited to the embodiments described herein, and also includes various changes and modifications made without departing from the scope of the present application.

[0100] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0101] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0102] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A friction coefficient detection device, characterized in that: It comprises a controller, a moving mechanism (1), a first clamping mechanism (2) and a second clamping mechanism (3); The first clamping mechanism (2) comprises a first clamping assembly (21) for clamping a workpiece (5); The moving mechanism (1) comprises a first driving component (11), a first sensor (12) and a mounting component (13); the mounting component (13) can be sleeved on a workpiece (5); the first driving component (11) is used to drive the mounting component (13) to move so that the mounting component (13) can apply a force in a first direction to the workpiece (5); the first sensor (12) is used to collect a first force parameter applied to the workpiece (5) along the first direction; The second clamping mechanism (3) comprises a second driving assembly (31), a second sensor (32) and a second clamping assembly (34) for clamping the first clamping assembly (21); the second driving assembly (31) is used to drive the second clamping assembly (34) to reciprocate along a second direction, thereby driving the workpiece (5) to reciprocate along the second direction relative to the mounting assembly (13); the second sensor (32) is used to collect a second force parameter applied to the workpiece (5) along the second direction; The first clamping mechanism (2) further comprises a driving component (22), a connecting component (23), a second guide rail component (24), and an elastic component (25) that moves along the first direction; The elastic component (25), the driving component (22) and the second guide rail component (24) are sequentially arranged on the connecting component (23); the first end of the second guide rail component (24) is detachably connected to the first clamping component (21), the second end of the second guide rail component (24) is connected to the first end of the connecting component (23), the second end of the connecting component (23) is detachably connected to the elastic component (25), and the elastic component (25) is drivingly connected to the driving end of the driving component (22); The elastic component (25) is capable of moving along the first direction under the drive of the driving component (22) to adjust the position of the first clamping component (21) in the first direction; The controller is used to obtain the first force parameter and the second force parameter, and calculate the friction coefficient based on the first force parameter and the second force parameter; wherein the first direction is arranged perpendicular to the second direction, the first direction is the gravity direction of the mounting component (13), and the second direction is the axial direction of the workpiece (5).

2. The friction coefficient detection device according to claim 1, characterized in that: Also included is a support assembly (4); The first clamping mechanism (2), the second clamping mechanism (3) and the moving mechanism (1) are arranged on the supporting assembly (4), and the mounting assembly (13) is arranged in the clamping space of the first clamping assembly (21).

3. The friction coefficient detection device according to claim 2, characterized in that: The moving mechanism (1) further comprises a first mounting bracket (14) and a floating assembly (15) capable of reciprocating along the first direction; The first driving component (11), the first sensor (12), the mounting component (13) and the floating component (15) are all arranged on the first mounting bracket (14); The first end of the floating component (15) is drivingly connected to the first driving component (11), and the first sensor (12) is arranged between the mounting component (13) and the second end of the floating component (15); the first driving component (11) is used to drive the mounting component (13) and the floating component (15) to move relative to the first mounting bracket (14).

4. The friction coefficient detection device according to claim 1, characterized in that: The second clamping mechanism (3) further comprises a first guide rail assembly (33), a second mounting bracket (35) and a leveling assembly (36); The leveling assembly (36), the second driving assembly (31), the second sensor (32), the first guide rail assembly (33), and the second clamping assembly (34) are all arranged on the second mounting bracket (35); The first guide rail assembly (33), the second sensor (32) and the second clamping assembly (34) are connected in sequence; the first guide rail assembly (33) is arranged along the second direction; the second drive assembly (31) is drivingly connected to the first guide rail assembly (33); the second drive assembly (31) drives the first guide rail assembly (33) to reciprocate, thereby driving the second clamping assembly (34) to reciprocate along the second direction.

5. The friction coefficient detection device according to claim 4, characterized in that: The second clamping mechanism (3) further comprises a displacement sensor (37); The displacement sensor (37) is arranged on the second mounting bracket (35), and the displacement sensor (37) is used to obtain the moving distance of the second clamping assembly (34).

6. The friction coefficient detection device according to claim 5, characterized in that: The second clamping assembly (34) comprises a connecting piece (341) and a third mounting bracket (342); The second sensor (32) and the connecting member (341) are both arranged on the third mounting bracket (342); The first end of the second sensor (32) is detachably connected to the third mounting bracket (342), and the second end of the second sensor (32) is detachably connected to the first guide rail assembly (33), so that the force deformation direction of the second sensor (32) is the same as the second direction; The first clamping assembly (21) is fixedly connected to the third mounting bracket (342) via the connecting piece (341), and the first clamping assembly (21) and the third mounting bracket (342) move in coordination.

7. The friction coefficient detection device according to claim 5, characterized in that: The first guide rail assembly (33) comprises a first air-floating shaft (331), a first bearing sleeve (332) and an air filter device (333) for filtering air; The first bearing sleeve (332) is sleeved on the first air floating shaft (331); the first bearing sleeve (332) and the first air floating shaft (331) are connected to form a first space; the air outlet of the air filter device (333) is in communication with the first space, and is used to pass air into the first space; One end of the first air-floating shaft (331) is drivingly connected to the second driving assembly (31); the first air-floating shaft (331) is driven by the second driving assembly (31) to move relative to the first bearing sleeve (332), thereby driving the second clamping assembly (34) to reciprocate along the axis of the first air-floating shaft (331).

8. The friction coefficient detection device according to claim 7, characterized in that: The second guide rail assembly (24) comprises a second air-floating shaft (241) and a second bearing sleeve (242) which are relatively slidably connected; The second bearing sleeve (242) is sleeved on the second air floating shaft (241); the second bearing sleeve (242) and the second air floating shaft (241) are connected to form a second space; the air outlet of the air filter device (333) is in communication with the second space, so as to allow air to flow into the second space; The second air-floating shaft (241) is detachably connected to the first clamping assembly (21); the first clamping assembly (21) is driven by the second clamping assembly (34) to reciprocate along the axis direction of the second air-floating shaft (241).

9. A friction coefficient detection device, characterized in that: comprising a display and a friction coefficient detection device as claimed in any one of claims 1 to 8; The friction coefficient detection device is electrically connected to the display; the display is used to display the friction coefficient.

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