Friction tester

Abstract

A friction resistance testing machine includes: a friction mechanism with a friction head, a workbench and a driving mechanism, wherein the friction head of the friction mechanism is located directly above the workbench, and the driving mechanism includes: a motor, a linkage component, an eccentric swing rod, an eccentric block, a connecting rod and a sliding frame that can move in a straight line, the motor and the eccentric swing rod are connected by a linkage component to drive the eccentric swing rod to swing around the axis, the eccentric swing rod is provided with a slide groove, the eccentric block can be arranged in the slide groove in a straight line, one end of the connecting rod is pivotally connected to the eccentric block, and the other end of the connecting rod is pivotally connected to the sliding frame, and the sliding frame is fixed to the workbench. The friction resistance testing machine of the utility model adopts a driving mechanism of a toggle structure, which can ensure the stability of reciprocating movement while speeding up the moving speed of the workbench, thereby improving the test efficiency.

Description

Technical Field

[0001] The utility model relates to a friction resistance testing machine, in particular to a friction resistance testing machine for a coating. Background Art

[0002] After the coating is attached to the product, it is usually necessary to test the friction resistance of the coating. In order to improve the test efficiency, improve the test accuracy and reduce the workload of workers, most manufacturers will use friction testers to automatically test the coating of the product. The friction tester generally includes a friction head, a workbench and a driving mechanism that drives the workbench to move back and forth. During the test, the product is placed on the workbench, the friction head contacts the coating of the product, and the driving mechanism drives the workbench to move back and forth until the coating is worn. At the same time, the number of reciprocating movements is recorded to obtain the friction resistance of the coating.

[0003] However, most existing friction resistance testing machines use a screw and a screw nut to drive the worktable to move back and forth (such as a friction testing device for automobile plastic parts disclosed in Chinese utility model CN211262947U). If high-speed movement is performed, the above-mentioned matching method is prone to slipping, resulting in the inability to further improve the efficiency of the friction resistance test. Utility Model Content

[0004] The technical solution of the utility model is aimed at the above situation. In order to solve the above problem, a friction resistance testing machine is provided, which includes: a friction mechanism with a friction head, a workbench and a driving mechanism. The friction head of the friction mechanism is located directly above the workbench. The driving mechanism includes: a motor, a linkage component, an eccentric pendulum, an eccentric block, a connecting rod and a sliding frame that can move in a straight line. The motor is connected to the eccentric pendulum through a linkage component to drive the eccentric pendulum to swing around the axis. The eccentric pendulum is provided with a slide groove, and the eccentric block can be movably arranged in the slide groove along a straight line. One end of the connecting rod is pivotally connected to the eccentric block, and the other end of the connecting rod is pivotally connected to the sliding frame. The sliding frame is fixed to the workbench.

[0005] Furthermore, the linkage component is a reducer, the input shaft of the reducer is fixed to the motor shaft of the motor, and the output shaft of the reducer is fixed to the eccentric swing arm.

[0006] Furthermore, the friction mechanism includes: a bracket, a balancing shaft and a friction device, the balancing shaft is fixed to the bracket, the friction device includes: a lever, a balancing weight, a bearing block, a counterweight and the friction head, the lever is rotatably arranged on the balancing shaft, the balancing weight and the bearing block are both fixed to the lever and the balancing shaft is located between the balancing weight and the bearing block, the counterweight is placed on the bearing block, and the friction head is fixed to the lower end of the bearing block.

[0007] Furthermore, there are multiple friction devices, and the multiple friction devices are arranged in a row.

[0008] Furthermore, the workbench includes: a supporting plate, a plurality of supporting frames, a plurality of pressure blocks and a plurality of screws. The plurality of supporting frames are fixed to the supporting plate and arranged in two rows. The two rows of supporting plates are opposite to each other and the arrangement direction of the two rows of supporting plates is the same as the arrangement direction of a row of friction devices. The supporting frame has a screw hole, the screw is engaged with the screw hole and the lower end of the screw is rotatably connected with the pressure block.

[0009] Furthermore, the friction resistance testing machine also includes: a base, the motor, linkage components, eccentric rocker arm, eccentric block and connecting rod are all located inside the base, the base is provided with a base plate, a track and a slider, the workbench is located directly above the base plate, the track is fixed to the lower surface of the base plate and the arrangement direction of the track is perpendicular to the arrangement direction of a row of friction devices, the slider can be movably arranged on the track along a straight line and the slider is fixed to the sliding frame.

[0010] After adopting the above technical solution, the beneficial effect of the utility model is: the friction resistance testing machine of the utility model adopts a driving mechanism of a toggle structure, which can ensure the stability of reciprocating movement while accelerating the moving speed of the workbench, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the friction resistance testing machine involved in the utility model;

[0012] Figure 2 This is an internal view of the friction resistance testing machine involved in the utility model;

[0013] Figure 3 It is a schematic diagram of a workbench involved in the utility model. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further described below by way of embodiments:

[0015] The utility model provides a friction resistance testing machine, combined with Figures 1-2As shown, the friction resistance testing machine includes: a friction mechanism 1 provided with a friction head 135, a workbench 2 and a driving mechanism 3, the friction head 135 of the friction mechanism 1 is located directly above the workbench 2, the driving mechanism 3 includes: a motor 31, a linkage component 32, an eccentric pendulum 33, an eccentric mass 34, a connecting rod 35 and a sliding frame 36 that can move in a straight line, the motor 31 and the eccentric pendulum 33 are connected through the linkage component 32 to drive the eccentric pendulum 33 to swing around the axis, the eccentric pendulum 33 is provided with a slide groove 330, the eccentric mass 34 can be movably arranged in the slide groove 330 along a straight line, one end of the connecting rod 35 is pivotally connected to the eccentric mass 34, the other end of the connecting rod 35 is pivotally connected to the sliding frame 36, and the sliding frame 36 is fixed to the workbench 2.

[0016] When using the friction tester, first place the coated product on the workbench 2, with the coated surface facing upward, and the friction head 135 of the friction mechanism 1 in contact with the coating. Then, the drive mechanism 3 is used to drive the workbench 2 to move back and forth, so that the friction head 135 and the coating rub against each other. Finally, the friction resistance of the coating is obtained by recording the number of reciprocating movements of the workbench 2 when the coating is worn, or the wear of the coating is checked after reaching a predetermined number of reciprocating movements, so as to determine whether the friction resistance of the coating meets the requirements. The above working process is the same as that of the prior art, and will not be described in detail here. Different from the prior art, the friction tester of the utility model adopts a toggle structure composed of an eccentric swing rod 33, an eccentric block 34 and a connecting rod 35. The motor 31 drives the eccentric swing rod 33 to swing around the axis through the linkage component 32, so as to cause the eccentric block 34 to reciprocate in the slide groove 330. The eccentric block 34 drives the sliding frame 36 to reciprocate through the connecting rod 35, thereby realizing the reciprocating movement of the workbench 2. Among them, different from the meshing structure of the screw and the screw nut in the prior art, the above-mentioned toggle structure will not slip due to the increase in moving speed, so it can further increase the reciprocating speed of the workbench, thereby improving the test efficiency.

[0017] In this embodiment, please continue to refer to Figure 2 The linkage component 32 is a reducer, the input shaft of the reducer is fixed to the motor shaft of the motor 31, and the output shaft of the reducer is fixed to the eccentric swing rod 33. Of course, in other embodiments, the linkage component 32 can also be other types of linkage components, such as a coupling, as long as it can drive the eccentric swing rod 33 to swing around the axis.

[0018] For details, please continue to refer to Figure 1The friction mechanism 1 includes: a bracket 11, a balancing shaft 12 and a friction device 13, the balancing shaft 12 is fixed to the bracket 11, the friction device 13 includes: a lever 131, a balancing weight 132, a bearing block 133, a counterweight 134 and the above-mentioned friction head 135, the lever 131 is rotatably arranged on the balancing shaft 12, the balancing weight 132 and the bearing block 133 are both fixed to the lever 131 and the balancing shaft 12 is located between the balancing weight 132 and the bearing block 133, the counterweight 134 is placed on the bearing block 133, and the friction head 135 is fixed to the lower end of the bearing block 133. Among them, the friction force between the friction head 135 and the coating can be adjusted by adjusting the number of the counterweight 134; the lever 131 can be kept balanced by configuring the number of the balancing weight 132.

[0019] More specifically, there are multiple friction devices 13, and the multiple friction devices 13 are arranged in a row. The friction tester can test multiple products at the same time.

[0020] More specifically, if Figure 3 As shown, the workbench 2 includes: a receiving plate 21, a plurality of receiving frames 22, a plurality of pressing blocks 23 and a plurality of screws 24. The plurality of receiving frames 22 are fixed to the receiving plate 21 and arranged in two rows. The two rows of receiving plates 21 are opposite to each other and the arrangement direction of the two rows of receiving plates 21 is the same as the arrangement direction of a row of friction devices 13. The receiving frame 22 has a screw hole 220. The screw 24 is engaged with the screw hole 220 and the lower end of the screw 24 is in rotational connection with the pressing block 23 (that is, the screw 24 and the pressing block 23 can rotate relative to each other). After the product is placed, the screw 24 can be rotated to move the screw 24 downward, and the pressing block 23 is driven to move downward, thereby pressing the end of the product. Since the lower end of the screw 24 is in rotational connection with the pressing block 23, the pressing block 23 will not rotate with the rotation of the screw 24.

[0021] For more details, please refer to Figure 1 and Figure 2 As shown, the friction tester also includes: a base 4, a motor 31, a linkage component 32, an eccentric swing rod 33, an eccentric block 34 and a connecting rod 35 are all located inside the base 4, the base 4 is provided with a base plate 41, a track 42 and a slider 43, the workbench 2 is located directly above the base plate 41, the track 42 is fixed to the lower surface of the base plate 41 and the arrangement direction of the track 42 is perpendicular to the arrangement direction of a row of friction devices 13, the slider 43 is arranged on the track 42 so as to be movable along a straight line and the slider 43 is fixed to the sliding frame 36. Among them, the sliding frame 36 can be moved along a straight line by the cooperation of the track 42 and the slider 43; the motor 31, the linkage component 32, the eccentric swing rod 33, the eccentric block 34 and the connecting rod 35 are arranged inside the base 4 to protect the above components.

Claims

1. A friction tester, comprising: A friction mechanism with a friction head, a workbench and a driving mechanism are provided, wherein the friction head of the friction mechanism is located directly above the workbench, and is characterized in that: the driving mechanism comprises: a motor, a linkage component, an eccentric pendulum rod, an eccentric block, a connecting rod and a sliding frame movable along a straight line, the motor and the eccentric pendulum rod are connected by a linkage component to drive the eccentric pendulum rod to swing around the axis, the eccentric pendulum rod is provided with a slide groove, the eccentric block can be movably arranged in the slide groove along a straight line, one end of the connecting rod is pivotally connected to the eccentric block, the other end of the connecting rod is pivotally connected to the sliding frame, and the sliding frame is fixed to the workbench.

2. The friction tester according to claim 1, characterized in that: The linkage component is a reducer, the input shaft of the reducer is fixed to the motor shaft of the motor, and the output shaft of the reducer is fixed to the eccentric swing rod.

3. The friction tester according to claim 1, characterized in that: The friction mechanism comprises: a bracket, a balancing shaft and a friction device, the balancing shaft is fixed to the bracket, the friction device comprises: a lever, a balancing weight, a bearing block, a counterweight and the friction head, the lever is rotatably arranged on the balancing shaft, the balancing weight and the bearing block are both fixed to the lever and the balancing shaft is located between the balancing weight and the bearing block, the counterweight is placed on the bearing block, and the friction head is fixed to the lower end of the bearing block.

4. The friction tester according to claim 3, characterized in that: There are multiple friction devices, and the multiple friction devices are arranged in a row.

5. The friction resistance testing machine according to claim 3, characterized in that: The workbench includes: a supporting plate, multiple supporting frames, multiple pressure blocks and multiple screws. The multiple supporting frames are fixed to the supporting plate and arranged in two rows. The two rows of supporting plates are opposite to each other and the arrangement direction of the two rows of supporting plates is the same as the arrangement direction of a row of friction devices. The supporting frame has screw holes, the screws are engaged with the screw holes and the lower ends of the screws are rotatably connected with the pressure blocks.

6. The friction resistance testing machine according to claim 3, characterized in that: The friction resistance testing machine also includes: a base, the motor, linkage components, eccentric swing rod, eccentric block and connecting rod are all located inside the base, the base is provided with a base plate, a track and a slider, the workbench is located directly above the base plate, the track is fixed to the lower surface of the base plate and the arrangement direction of the track is perpendicular to the arrangement direction of a row of friction devices, the slider can be movably arranged on the track along a straight line and the slider is fixed to the sliding frame.

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