Shear force test tool for composite brake pad

Abstract

The utility model relates to the field of railway product part processing and manufacturing, in particular to a shear force test tool for a composite brake pad, which comprises a product pressure head and a product fixing tool, the product pressing head is used for pressing the friction body downwards; the product fixing tool comprises a bottom plate, a supporting plate extending vertically is fixedly mounted at the top of the bottom plate, a mounting groove used for containing the steel backing is formed in one side of the supporting plate, and a pressing block used for pressing the steel backing is detachably mounted on the supporting plate. The steel backing is placed in the installation groove of the supporting plate, the pressing block is fixed to the supporting plate through the hexagon socket screws, the steel backing is pressed through one end of the pressing block, and the steel backing is prevented from shaking in the test process.

Description

Technical Field

[0001] The utility model relates to the field of processing and manufacturing railway product parts, in particular to a shear force test tool for a synthetic brake pad. Background Art

[0002] Trains occupy a very important position in people's travel, especially long-distance travel. Most people will give priority to traveling by train. The braking system, which ensures the safety of the train, is particularly important.

[0003] The shear force test in the physical and mechanical performance testing of brake pads is mainly to test the bonding ability between the brake pad friction body and the steel back. If the shear force performance of the product is not up to standard, it is very likely to cause the product to fall off in daily use, such as falling off, and seriously affecting the braking performance.

[0004] In the prior art, the utility model patent with application number CN201822234759.2 discloses a powder metallurgy brake pad friction body bonding surface strength test shearing tool, including a fixed seat, a pressure rod and a cover plate, the fixed seat is provided with a sliding hole that slides with the pressure rod, the fixed seat is also provided with a mounting groove for mounting the brake pad friction body, the mounting groove is connected to the sliding hole, the cover plate is detachably connected to the fixed seat to press the brake pad friction body, and the mounting groove is detachably provided with a blade block that matches the pressure rod to shear the brake pad friction body. Put the test block cut to the specified size into the mounting groove, press it into the mounting groove by two screws on the cover plate, and then place the tool as a whole on the tensile testing machine, press the pressure rod until the bonding surface of the brake pad friction body completely falls off, and the test is completed.

[0005] The existing shearing tooling needs to cut the product into test pieces of specified size to complete the shear force test. However, in actual processing and production, some product standards require the shear force of the entire product to be tested. The existing shearing tooling cannot complete the shear force test of the entire composite brake pad product, which needs to be improved. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a tooling capable of completing the overall shear force test of a composite brake piece, so as to solve the problems in the prior art.

[0007] In order to solve the above technical problems, the technical solution of the utility model is: a shear force testing tool for a synthetic brake pad, comprising a product pressure head and a product fixing tool; the product pressure head is used to apply downward pressure to the friction body; the product fixing tool comprises a base plate, a vertically extending support plate is fixedly installed on the top of the base plate, one side of the support plate is provided with a mounting groove for placing a steel back, and a pressure block for pressing the steel back is detachably installed on the support plate.

[0008] As a further improvement, the pressing block is semi-cylindrical, and one side of the pressing block is in contact with the support plate.

[0009] As a preferred technical solution, the pressing block is mounted on the supporting plate by means of hexagon socket bolts.

[0010] As a preferred technical solution, the support plate is provided with four mounting holes distributed in a rectangular array, a locking rod is passed through the mounting holes, the locking rod is sleeved with the pressure block, and a first stopper is fixedly installed at one end of the locking rod to prevent the pressure block from falling off.

[0011] As a further improvement, a locking device is installed on two locking rods that are opposite to each other up and down or left and right, and the locking device is located on the side of the support plate away from the pressure block; the locking device includes a mounting frame and two locking blocks, the two locking blocks are a fixed block and a movable block respectively, the fixed block is fixedly installed on the mounting frame, the movable block is slidably installed on the mounting frame, and the mounting frame is screwed with an adjusting bolt for pushing the movable block close to the fixed block; the locking block is provided with a strip hole for the locking rod to pass through, the two locking rods are respectively sleeved in the corresponding strip holes of the locking blocks, and the end of the locking rod away from the first stop block is fixedly installed with a second stop block for preventing the locking block from falling off; one side of the locking block is attached to the support plate, and the two locking blocks gradually become thicker from the inner end to the outer end.

[0012] After adopting the above technical solution, the beneficial effects of the utility model are:

[0013] (1) In this application, the steel back is placed in the mounting groove of the support plate, the pressing block is fixed to the support plate with a hexagon socket bolt, and the steel back is pressed by one end of the pressing block to prevent the steel back from shaking during the test. There is no need to cut the synthetic brake pad, which can meet the requirements of the overall shear force test of the synthetic brake pad;

[0014] (2) The present application pushes the movable block to move toward the side close to the fixed block by adjusting the bolt, so that the thicker ends of the two locking blocks move to between the support plate and the second stop block, so that the two pressure blocks simultaneously press the steel back, which improves the fixing efficiency of the composite brake pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the product fixing tooling of the second embodiment of the utility model;

[0018] Figure 3 yes Figure 2 A schematic diagram of the structure on the back of the device;

[0019] Figure 4 yes Figure 2 AA section diagram.

[0020] In the figure: 1-product pressure head; 2-slider; 3-bottom plate; 4-support plate; 5-mounting groove; 6-pressure block; 7-hexagon socket bolt; 8-mounting hole; 9-locking rod; 10-first stopper; 11-mounting frame; 12-locking block; 13-fixed block; 14-movable block; 15-sliding pin; 16-long strip hole; 17-adjusting bolt; 18-limiting column; 19-strip hole; 20-second stopper; 21-steel back; 22-friction body. DETAILED DESCRIPTION

[0021] Embodiment 1:

[0022] like Figure 1 As shown, a shear force test fixture for a synthetic brake pad includes a product pressure head 1 and a product fixing fixture. The product pressure head 1 is used to apply downward pressure to the friction body 22. The bottom of the product pressure head 1 is in an arc shape that fits the top of the friction body 22. The top of the product pressure head 1 is designed with a slider 2 according to the shape of the universal testing machine pressure head slideway.

[0023] The product fixing tooling includes a base plate 3, a vertically extending support plate 4 is fixed on the top of the base plate 3 by bolts, a mounting groove 5 for placing the steel back 21 is provided on the front side of the support plate 4, the shape of the mounting groove 5 matches the steel back 21, and the depth of the mounting groove 5 is consistent with the thickness of the steel back 21, so that when the steel back 21 is placed in the mounting groove 5, the friction body 22 extends out of the mounting groove 5, and a pressure block 6 for pressing the steel back 21 is detachably installed on the support plate 4.

[0024] In this embodiment, the pressing block 6 is semi-cylindrical, and one flat side of the pressing block 6 is in contact with the support plate 4. Specifically, four pressing blocks 6 are provided, and a through hole is provided on the pressing block 6. A hexagon socket bolt 7 is passed through the through hole, and the hexagon socket bolt 7 is screwed on the support plate 4.

[0025] When in use, place the steel back 21 of the composite brake pad in the mounting groove 5 of the support plate 4, fix the pressing block 6 to the support plate 4 using the hexagon socket bolt 7, and press the steel back 21 with one end of the pressing block 6 to prevent the steel back 21 from shaking during the test.

[0026] Finally, connect the slider 2 on the upper end of the product pressure head 1 to the pressure head of the universal testing machine, place the product fixing tool under the product pressure head 1, and start the overall shear force test of the composite gate piece.

[0027] Embodiment 2:

[0028] like Figures 2 to 4 As shown, the difference between this embodiment and the first embodiment is that four mounting holes 8 distributed in a rectangular array are provided on the support plate 4, a locking rod 9 is passed through the mounting hole 8, a pressure block 6 is sleeved on the locking rod 9, and a first stopper 10 for preventing the pressure block 6 from falling off is screwed on one end of the locking rod 9.

[0029] A lock is installed on the two locking rods 9 opposite to each other, and the lock is located on the side of the support plate 4 away from the pressure block 6; the lock includes a mounting frame 11 in a rectangular frame and two locking blocks 12, the two locking blocks 12 are respectively a fixed block 13 and a movable block 14, the fixed block 13 is welded in the lower end of the mounting frame 11, and the movable block 14 is vertically slidably installed in the mounting frame 11, and the opposite sides of the movable block 14 are respectively embedded with horizontally extending sliding pins 15, and the opposite side walls of the mounting frame 11 are respectively provided with elongated holes 16 matching the sliding pins 15, and the sliding pins 15 can slide up and down in the elongated holes 16, and the top wall of the mounting frame 11 is provided with screw holes, and screw holes are screwed with a screw for pushing the movable block 14 close to the fixed block 13 An adjusting bolt 17 is provided, the adjusting bolt 17 extends vertically, and a laterally extending limit column 18 is embedded at the lower end of the adjusting bolt 17. The limit column 18 is located inside the mounting frame 11, which can prevent the adjusting bolt 17 from completely detaching from the mounting frame 11 upward; a strip hole 19 is provided on the locking block 12 for the locking rod 9 to pass through, and the length direction of the strip hole 19 extends vertically. The two locking rods 9 are respectively sleeved in the strip holes 19 of the corresponding locking blocks 12, and a second stopper 20 is welded at one end of the locking rod 9 away from the first stopper 10 to prevent the locking block 12 from falling off; one side of the locking block 12 is attached to the support plate 4, and the two locking blocks 12 gradually become thicker from the inner end to the outer end, and the inner side of the second stopper 20 is provided with an inclined surface that fits the locking block 12.

[0030] When fixing the composite brake pad, place the steel back 21 in the mounting groove 5, and then adjust the angle of the pressure block 6 so that one end of it rotates to the front side of the steel back 21; rotate the adjusting bolt 17 to move it downward, and the lower end of the adjusting bolt 17 abuts against the top of the movable block 14 and pushes the movable block 14 to move downward toward the side close to the fixed block 13, so that the thicker end of the two locking blocks 12 moves between the support plate 4 and the second stop block 20, and then the locking rod 9 drives the first stop block 10 to move backward toward the support plate 4, so that the two pressure blocks 6 simultaneously press the steel back 21, which has a higher fixing efficiency for the composite brake pad.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A shear force test tool for a synthetic brake pad, characterized in that: It includes a product pressing head and a product fixing tool; the product pressing head is used to apply downward pressure to the friction body; the product fixing tool includes a base plate, a vertically extending support plate is fixedly installed on the top of the base plate, one side of the support plate is provided with a mounting groove for placing a steel back, and a pressure block for pressing the steel back is detachably installed on the support plate.

2. A shear force test tool for a composite brake pad as claimed in claim 1, characterized in that: The pressing block is semi-cylindrical, and one side of the pressing block is in contact with the supporting plate.

3. A shear force test tool for a composite brake pad as claimed in claim 1, characterized in that: The pressing block is mounted on the supporting plate by means of hexagon socket bolts.

4. A shear force test tool for a composite brake pad as claimed in claim 1, characterized in that: The support plate is provided with four mounting holes distributed in a rectangular array, a locking rod is passed through the mounting hole, the locking rod is sleeved with the pressure block, and a first stopper for preventing the pressure block from falling off is fixedly mounted at one end of the locking rod.

5. A shear force test tool for a composite brake pad as claimed in claim 4, characterized in that: A locking device is installed on two locking rods that are opposite to each other up and down or left and right, and the locking device is located on the side of the support plate away from the pressure block; the locking device comprises a mounting frame and two locking blocks, the two locking blocks are respectively a fixed block and a movable block, the fixed block is fixedly installed on the mounting frame, the movable block is slidably installed on the mounting frame, and the mounting frame is screwed with an adjusting bolt for pushing the movable block close to the fixed block; the locking block is provided with a strip hole for the locking rod to pass through, the two locking rods are respectively sleeved in the corresponding strip holes of the locking blocks, and the end of the locking rod away from the first stop block is fixedly installed with a second stop block for preventing the locking block from falling off; one side of the locking block is attached to the support plate, and the two locking blocks gradually become thicker from the inner end to the outer end.

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