Leather wear resistance testing device capable of adjusting friction force

Abstract

The utility model relates to the technical field of leather, and discloses a leather wear resistance testing device capable of adjusting friction force, which comprises a bottom plate and a top plate, the bottom plate is fixedly connected with a top plate support through a support column, the bottom surface of the top plate is fixedly connected with an electric telescopic rod, the bottom end of the electric telescopic rod is fixedly connected with a pressure sensor, and the pressure sensor is fixedly connected with a motor. The bottom surface of the pressure sensor is fixedly connected with a mounting seat, the side wall of the mounting seat is fixedly connected with four groups of curved bars which are symmetrically arranged, the bottom end of each curved bar is provided with a clamping assembly, the clamping assembly comprises a pressing plate, and the side wall of the pressing plate is provided with a plurality of groups of notches which are distributed in an array mode. According to the utility model, through the rotation of the rotating disc, the extrusion rod in the chute extrudes towards the interior of the chute, so that the extrusion rod drives the extension plate to extend towards the periphery of the pressing plate or gather towards the middle distance of the pressing plate, and the contact area with a leather sample is adjusted so as to adapt to the leather samples with different sizes.

Description

Technical Field

[0001] This utility model relates to the field of leather technology, and in particular to a leather abrasion resistance testing device with adjustable friction. Background Technology

[0002] After production, leather needs to undergo various physical and chemical tests to ensure its quality. Among these tests, the abrasion resistance of leather is an important indicator that is frequently tested. If the abrasion resistance of leather does not meet the standards, leather products are prone to wear, tear, and shortened lifespan during use.

[0003] A search revealed Chinese Patent Publication No. CN209117506U, which discloses a leather abrasion resistance testing machine. By setting four clamping members above the grinding disc, multiple leather samples can be clamped simultaneously for testing, resulting in high testing efficiency. The samples are pressed onto the grinding disc by an electric telescopic rod, and the clamping force is precisely controlled by a controller and a pressure sensor to ensure the stability and accuracy of the contact between the samples and the grinding disc.

[0004] The aforementioned abrasion testing machine has certain drawbacks during use, such as the need to cut leather samples into a certain shape and size before clamping, which cannot meet the abrasion testing requirements of leathers of different sizes. Therefore, an adjustable friction abrasion testing device for leather is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a leather abrasion resistance testing device with adjustable friction, which aims to improve the problem that in the prior art, leather samples need to be cut into a certain shape and size before being clamped, which cannot meet the abrasion resistance testing requirements of leathers of different sizes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable friction leather abrasion resistance testing device includes a base plate and a top plate. The base plate and the top plate support are fixedly connected by a support column. An electric telescopic rod is fixedly connected to the bottom surface of the top plate. A pressure sensor is fixedly connected to the bottom end of the electric telescopic rod. A mounting base is fixedly connected to the bottom surface of the pressure sensor. Four sets of symmetrically arranged curved rods are fixedly connected to the side wall of the mounting base. A clamping assembly is provided at the bottom end of the curved rod. The clamping assembly includes a pressure plate. The side wall of the pressure plate has multiple arrayed notches. An extension plate is slidably connected inside the notches. A pressing rod is fixedly connected to the surface of the extension plate. A turntable is rotatably connected to the outer wall of the curved rod. The surface of the turntable has four sets of symmetrically arranged inclined grooves. The pressing rod is inserted into the inclined groove. Multiple sets of arrayed toothed grooves are formed on the side wall of the turntable.

[0008] As a further description of the above technical solution:

[0009] The side wall of the crank is provided with a limiting component, the limiting component includes a groove, a movable plate is slidably connected inside the groove, and a positioning rod is fixedly connected to the bottom surface of the movable plate, the positioning rod being inserted into the inside of the tooth groove.

[0010] As a further description of the above technical solution:

[0011] A grinding assembly is fixedly connected to the surface of the base plate. The grinding assembly includes a column, which is fixedly connected to the surface of the base plate. A tray is fixedly connected to the top of the column.

[0012] As a further description of the above technical solution:

[0013] The surface of the tray is provided with a collection groove, and an annular baffle is fixedly connected to the surface of the tray. The bottom surface of the collection groove is provided with a discharge port, and a collection box is placed on the surface of the bottom plate, with the collection box corresponding to the position of the discharge port.

[0014] As a further description of the above technical solution:

[0015] A motor is fixedly connected to the bottom surface of the tray, and the output shaft of the motor passes through and is rotatably connected to the surface of the tray. A grinding disc is fixedly connected to the end of the motor output shaft.

[0016] As a further description of the above technical solution:

[0017] The surface of the movable plate has a through hole, and a guide rod is slidably connected in the through hole. The end of the guide rod is fixedly connected to the inner wall of the groove.

[0018] As a further description of the above technical solution:

[0019] The movable plate is elastically connected to the inner wall of the groove by a reset spring.

[0020] As a further description of the above technical solution:

[0021] A limiting groove is formed on the inner wall of the notch, and a limiting block is slidably connected inside the limiting groove. The limiting block is fixedly connected to the side wall of the extension plate.

[0022] As a further description of the above technical solution:

[0023] A side plate is fixedly connected to the side wall of the grinding disc, and a cleaning brush is fixedly connected to the bottom surface of the side plate.

[0024] As a further description of the above technical solution:

[0025] The tray has multiple sets of neatly arranged mounting slots, and rollers are rotatably connected inside the mounting slots. The grinding disc is in contact with the surface of the rollers.

[0026] This utility model has the following beneficial effects:

[0027] 1. In this utility model, the rotation of the turntable causes the extrusion rod inside the inclined groove to press into the inclined groove, causing the extrusion rod to drive the extension plate to extend to the periphery of the pressure plate or to converge towards the center of the pressure plate, adjusting the contact area with the leather sample to adapt to leather samples of different sizes.

[0028] 2. In this utility model, the reset spring provides downward pressure to the moving plate, causing the positioning rod to insert into the toothed groove on the side wall of the turntable, thereby fixing the position of the turntable and keeping the extension plate in a relatively fixed state, thus preventing the extension plate from sliding during operation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a leather abrasion resistance testing device with adjustable friction force proposed in this utility model.

[0030] Figure 2 This is a schematic diagram of the electric telescopic rod structure of an adjustable friction leather abrasion resistance testing device proposed in this utility model;

[0031] Figure 3 This is a schematic diagram of the clamping and limiting components of an adjustable friction leather abrasion resistance testing device proposed in this utility model.

[0032] Figure 4 This is a schematic diagram of the polishing component structure of an adjustable friction leather abrasion resistance testing device proposed in this utility model.

[0033] Legend:

[0034] 1. Base plate; 2. Top plate; 3. Support column; 4. Electric telescopic rod; 5. Pressure sensor; 6. Mounting base; 7. Curved rod; 8. Clamping assembly; 81. Pressure plate; 82. Notch; 83. Extension plate; 84. Limiting groove; 85. Limiting block; 86. Extrusion rod; 87. Turntable; 88. Inclined groove; 89. Toothed groove; 9. Limiting assembly; 91. Groove; 92. Moving plate; 93. Guide rod; 94. Positioning rod; 95. Return spring; 10. Grinding assembly; 101. Column; 102. Tray; 103. Mounting groove; 104. Roller; 105. Motor; 106. Grinding disc; 107. Collection trough; 108. Annular baffle; 109. Discharge port; 110. Collection box; 111. Side plate; 112. Cleaning brush. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Reference Figure 1 - Figure 2 This utility model provides an embodiment of a leather abrasion resistance testing device with adjustable friction force, comprising a base plate 1 and a top plate 2. The base plate 1 and the top plate 2 are fixedly connected by support columns 3. Four sets of support columns 3 are symmetrically arranged at the corners between the base plate 1 and the top plate 2, providing support and fixation for the top plate 2. An electric telescopic rod 4 is fixedly connected to the bottom surface of the top plate 2. A pressure sensor 5 is fixedly connected to the bottom end of the electric telescopic rod 4. A mounting base 6 is fixedly connected to the bottom surface of the pressure sensor 5. A controller is provided on the front side of the surface of the base plate 1 and is connected to the electric telescopic rod 4 and the pressure sensor 5 through wires. Four sets of symmetrically arranged curved rods 7 are fixedly connected to the side wall of the mounting base 6. A clamping assembly 8 is provided at the bottom end of the curved rods 7. The electric telescopic rod 4 moves downward by controlling the pressure sensor 5, the mounting base 6, and the curved rods 7, so that the clamping assembly 8 presses the leather sample onto the surface of the polishing disc 106. The pressure sensor 5 transmits the pressure data to the controller, and the data is displayed on the display on the controller, thereby facilitating the control of the pressure applied by the electric telescopic rod 4.

[0037] Reference Figure 2 - Figure 3The clamping assembly 8 includes a pressure plate 81. The sidewall of the pressure plate 81 has multiple arrayed notches 82. An extension plate 83 is slidably connected inside the notches 82. A limiting groove 84 is formed in the inner wall of the notches 82. A limiting block 85 is slidably connected inside the limiting groove 84 and is fixedly connected to the sidewall of the extension plate 83. The notches 82 provide space for the extension plate 83 to extend. By unfolding and retracting the extension plate 83, the contact area with the leather sample can be adjusted to accommodate leather samples of different sizes. The limiting groove 84 and the limiting block 85 provide a guiding track for the extension plate 83 and limit the movement distance of the extension plate 83, allowing the extension plate 83 to move stably within the notches 82. An extrusion rod 86 is fixedly connected to the surface of the extension plate 83. A turntable 87 is rotatably connected to the outer wall of the curved rod 7. The surface of the turntable 87 has four sets of symmetrically arranged inclined slots 88. The extrusion rod 86 is inserted into the inside of the inclined slots 88. By rotating the turntable 87, the extrusion rod 86 inside the inclined slots 88 is pressed against the inside of the inclined slots 88, causing the extrusion rod 86 to drive the extension plate 83 to extend to the periphery of the pressure plate 81 or to converge towards the center of the pressure plate 81. Multiple sets of arrayed toothed grooves 89 are provided on the side wall of the turntable 87. The toothed grooves 89 facilitate manual rotation of the turntable 87 and cooperate with the limiting component 9 to fix the turntable 87, ensuring that the turntable 87 is fixed in position during operation.

[0038] Reference Figure 2 - Figure 3 The side wall of the crank 7 is provided with a limiting component 9, which includes a groove 91. A movable plate 92 is slidably connected inside the groove 91. A through hole is opened on the surface of the movable plate 92, and a guide rod 93 is slidably connected in the through hole. The end of the guide rod 93 is fixedly connected to the inner wall of the groove 91. The guide rod 93 is used to provide positioning and guidance for the movable plate 92, so that the movable plate 92 can move stably in the vertical direction inside the groove 91. A positioning rod 94 is fixedly connected to the bottom surface of the movable plate 92. The positioning rod 94 is inserted into the toothed groove 89. The movable plate 92 is elastically connected to the inner wall of the groove 91 by a return spring 95. The return spring 95 provides downward pressure to the movable plate 92, so that the positioning rod 94 is inserted into the toothed groove 89 on the side wall of the turntable 87, so that the position of the turntable 87 is fixed and the extension plate 83 remains in a relatively fixed state. When it is necessary to adjust the length of the extension plate 83, the movable plate 92 is lifted, so that the positioning rod 94 is separated from the toothed groove 89, and the fixation of the turntable 87 is released.

[0039] Reference Figure 1 , Figure 4A grinding assembly 10 is fixedly connected to the surface of the base plate 1. The grinding assembly 10 includes a column 101, which is fixedly connected to the surface of the base plate 1. A tray 102 is fixedly connected to the top of the column 101. The tray 102 has multiple sets of neatly distributed mounting slots 103. Rollers 104 are rotatably connected inside the mounting slots 103. The column 101 and the tray 102 are used to support the grinding disc 106 and ensure the overall stability of the grinding assembly 10. The mounting slot 103 is used to mount the roller 104. The roller 104 contacts the polishing disc 106, providing support for the polishing disc 106 and facilitating its rotation. The bottom surface of the tray 102 is fixedly connected to the motor 105. The output shaft of the motor 105 passes through and is rotatably connected to the surface of the tray 102. The end of the output shaft of the motor 105 is fixedly connected to the polishing disc 106. The polishing disc 106 is in contact with the surface of the roller 104. The motor 105 drives the polishing disc 106 to rotate through its output shaft, thereby performing an abrasion resistance test on the leather sample pressed on the surface of the polishing disc 106. A collection trough 107 is formed on the surface of the tray 102, and an annular baffle 108 is fixedly connected to the surface of the tray 102. A discharge port 109 is formed on the bottom surface of the collection trough 107, and a collection box 110 is placed on the surface of the base plate 1. The collection box 110 is positioned corresponding to the discharge port 109. The collection trough 107 is used to collect spilled waste. The annular baffle 108 forms a raised edge on the surface of the tray 102 to intercept waste, allowing the waste to fall smoothly into the interior of the collection trough 107, thus improving the collection effect. The discharge port 109 is used to discharge the waste accumulated in the collection trough 107 into the collection box 110. A side plate 111 is fixedly connected to the side wall of the grinding disc 106, and a cleaning brush 112 is fixedly connected to the bottom surface of the side plate 111. The cleaning brush 112 is located inside the collection trough 107. The side plate 111 rotates with the grinding disc 106, causing the cleaning brush 112 to move in a circular motion inside the collection tank 107, pushing the waste material towards the discharge port 109, which facilitates the cleaning of the waste material in the collection tank 107.

[0040] Working principle: In use, first place the leather sample on the surface of the polishing disc 106. Then, by raising the moving plate 92, the positioning rod 94 is separated from the toothed groove 89, releasing the fixation of the turntable 87. By manually rotating the turntable 87, the rotation of the turntable 87 causes the pressing rod 86 inside the inclined groove 88 to press against the inside of the inclined groove 88. The pressing rod 86 drives the extension plate 83 to extend to the periphery of the pressure plate 81 or to converge towards the center of the pressure plate 81 until the extension plate 83 is in contact with the edge of the leather sample. Release the moving plate 92, and the return spring 95 lifts. The downward pressure of the moving plate 92 causes the positioning rod 94 to insert into the toothed groove 89 on the side wall of the turntable 87, thus fixing the position of the turntable 87 and keeping the extension plate 83 relatively fixed. Then, the electric telescopic rod 4 is activated by the controller. The extension of the electric telescopic rod 4 pushes the pressure sensor 5, the mounting base 6, and the crank 7 downward, so that the clamping assembly 8 presses the leather sample onto the surface of the polishing disc 106. The pressure sensor 5 transmits the pressure data to the controller, and the data is displayed on the display on the controller, thereby facilitating the control of the pressure applied by the electric telescopic rod 4.

[0041] Then, by starting the motor 105, the output shaft of the motor 105 drives the polishing disc 106 to rotate, thereby conducting an abrasion resistance test on the leather sample pressed on the surface of the polishing disc 106. During the test, the side plate 111 rotates with the rotation of the polishing disc 106, causing the cleaning brush 112 to make circular motion inside the collection tank 107, pushing the waste material to the discharge port 109, which facilitates the cleaning of the waste material in the collection tank 107. After the test is completed, the electric telescopic rod 4 and the motor 105 are turned off by the controller. Then, by lifting the moving plate 92, the fixation of the turntable 87 is released. The turntable 87 is rotated in the opposite direction, causing the extension plate 83 to retract. Then, the electric telescopic rod 4 is lifted upward, causing the clamping assembly 8 to separate from the leather sample. Then, the leather sample can be taken out.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable friction force leather abrasion testing device comprising a base plate (1) and a top plate (2), characterized in that: The bottom plate (1) and the top plate (2) support are fixedly connected through the supporting column (3), the bottom surface of the top plate (2) is fixedly connected with the electric telescopic rod (4), the bottom end of the electric telescopic rod (4) is fixedly connected with the pressure sensor (5), the bottom surface of the pressure sensor (5) is fixedly connected with the mounting seat (6), the side wall of the mounting seat (6) is fixedly connected with four groups of symmetrically arranged curved rods (7), the bottom end of the curved rod (7) is provided with a clamping assembly (8), the clamping assembly (8) comprises a pressing plate (81), a plurality of groups of array distribution notches (82) are formed in the side wall of the pressing plate (81), the inside of the notch (82) is slidably connected with an extension plate (83), the surface of the extension plate (83) is fixedly connected with an extrusion rod (86), the outer wall of the curved rod (7) is rotatably connected with a rotating disc (87), the surface of the rotating disc (87) is provided with four groups of symmetrically arranged inclined grooves (88), the extrusion rod (86) is inserted into the inclined groove (88), a plurality of groups of array distribution tooth grooves (89) are formed in the side wall of the rotating disc (87).

2. A device for abrasion testing of leather according to claim 1, characterized in that: The side wall of the curved rod (7) is provided with a limiting assembly (9), the limiting assembly (9) comprises a groove (91), the inside of the groove (91) is slidably connected with a moving plate (92), the bottom surface of the moving plate (92) is fixedly connected with a positioning rod (94), and the positioning rod (94) is inserted into the tooth groove (89).

3. A device for abrasion testing of leather according to claim 1, characterized in that: The surface of the bottom plate (1) is fixedly connected with a polishing assembly (10), the polishing assembly (10) comprises a stand column (101), the stand column (101) is fixedly connected on the surface of the bottom plate (1), and the top of the stand column (101) is fixedly connected with a tray (102).

4. A device for abrasion testing of leather according to claim 3, characterized in that: The surface of the tray (102) is provided with a collecting groove (107), the surface of the tray (102) is fixedly connected with an annular baffle (108), the bottom surface of the collecting groove (107) is provided with a discharge port (109), the surface of the bottom plate (1) is placed with a collecting box (110), and the position of the collecting box (110) corresponds to the discharge port (109).

5. A device for abrasion testing of leather according to claim 3, characterized in that: The bottom surface of the tray (102) is fixedly connected with a motor (105), the output shaft of the motor (105) penetrates and is rotatably connected on the surface of the tray (102), and the end of the output shaft of the motor (105) is fixedly connected with a polishing disc (106).

6. The adjustable friction leather abrasion testing device of claim 2, wherein: The surface of the moving plate (92) is provided with a through hole, and a guide rod (93) is slidably connected in the through hole, and the end of the guide rod (93) is fixedly connected on the inner wall of the groove (91).

7. The adjustable friction leather abrasion testing device of claim 2, wherein: The moving plate (92) is elastically connected on the inner wall of the groove (91) through a reset spring (95).

8. The adjustable friction leather wear testing device of claim 1, wherein: The inner wall of the notch (82) is provided with a limiting groove (84), the inside of the limiting groove (84) is slidably connected with a limiting block (85), and the side wall of the limiting block (85) is fixedly connected with the extension plate (83).

9. The adjustable friction leather wear testing device of claim 5, wherein: The side wall of the polishing disc (106) is fixedly connected with a side plate (111), and the bottom surface of the side plate (111) is fixedly connected with a cleaning brush (112).

10. The adjustable friction leather wear testing device of claim 5, wherein: The tray (102) is provided with a plurality of groups of arranged mounting grooves (103), the inside of the mounting grooves (103) is rotationally connected with a roller (104), and the polishing disc (106) is attached to the surface of the roller (104).

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