A powder metallurgy brake shoe friction and wear test shoe
By designing a test vato for friction and wear experiments of powder metallurgy gate walls including bottom plate, support plate, tile nose brazing and spring sheet, the problem of insufficiency of powder metallurgy gate walls and test machine clamps in the prior art was solved, and stability and accuracy during the experiment were achieved.
Patent Information
- Application Number
- CN202420698267.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-04-07
AI Technical Summary
In the prior art, the bond between the powder metallurgical gate tiles and the clamps of the test machine in the friction and wear performance experiment is not strong, resulting in vibration and noise during the experiment, affecting the accuracy of the experimental results.
A vatore for friction and wear experiments of powder metallurgy gate shingles is designed, including bottom plate, support plate, tile nose brazing and spring sheets. The tile nose brazing is matched with the positioning groove and slot of the tile nose brazing, and combined with the spring sheet fixing mechanism, the firm connection between the tile nose brazing and the clamp of the test machine is ensured.
It effectively reduces the occurrence of abnormal vibration and noise in friction and wear experiments, improves the accuracy of experimental results, and ensures the stable fixation of the tile nose brazing through the design of the spring blade, avoiding accidental falloff.
Smart Images
Figure CN222719362U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of processing and manufacturing railway product parts, in particular to a shoe support for a powder metallurgy brake shoe friction and wear experiment. Background Art
[0002] There are many ways of train braking, including resistance braking, magnetic rail braking, eddy current braking, friction braking, etc. Among them, friction braking is indispensable. The performance of brake shoes and brake pads has become an important aspect related to the safety of train operation.
[0003] Friction and wear performance and physical and mechanical performance tests are important performance tests for brake shoes and pads. The results of friction and wear performance tests directly affect whether the train brake shoes and pads are qualified. In addition, the standards for train brake shoes and pads all require the use of a 1:1 friction and wear performance tester to test the product.
[0004] In the prior art, when conducting friction and wear tests on powder metallurgy brake shoes, the powder metallurgy brake shoes are generally fixed to the actual train shoe brackets, and then the actual train shoe brackets are fixed to the clamps of the friction and wear performance tester. However, the clamp structure of the friction and wear performance tester is different from the shape of the actual vehicle clamp, which leads to the mismatch between the actual train shoe brackets and the friction and wear performance test clamps. Subsequently, vibrations, noises, and other phenomena occur in the subsequent experimental process, resulting in inaccurate results of the friction and wear performance test.
[0005] Therefore, there is an urgent need in the market for a powder metallurgy brake shoe motor suitable for friction and wear performance experiments. Utility Model Content
[0006] The technical problem to be solved by the utility model is to provide a powder metallurgy brake shoe friction and wear test shoe support, which is more firmly combined with the test machine clamp 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 shoe support for friction and wear experiments of powder metallurgy brake shoes, comprising a bottom plate, the bottom plate is provided with a fixing screw hole, a support plate is fixedly installed on the top of the bottom plate, the top of the support plate is in an arc shape that fits the steel back of the powder metallurgy brake shoe, a shoe nose is provided in the middle of the back of the steel back, and a positioning groove matching the shoe nose is provided on the top of the support plate; a first support block is fixedly installed on the bottom plate, the first support block is provided with a guide hole, and a shoe matching the shoe nose is slidably installed in the guide hole A matching shoe nose brace, a second supporting block is also fixedly mounted on the bottom plate, the second supporting block is provided with a slot for inserting one end of the shoe nose brace; a spring sheet is provided on the shoe nose brace, one end of the spring sheet is fixedly mounted on the shoe nose brace and fits with the shoe nose brace, the other end of the spring sheet extends in a direction away from the slot and tilts toward a side away from the shoe nose brace, a baffle matching the spring sheet is movably mounted on the first supporting block, the baffle blocks the spring sheet to limit the shoe nose brace from leaving the slot.
[0008] As a further improvement, a mounting groove is provided in the first support block, and the guide hole is connected to the mounting groove; a guide column is fixedly installed in the mounting groove, and mounting parts are respectively provided at both ends of the baffle plate, and both mounting parts are slidably installed on the guide column; a notch is provided on the baffle plate for the spring sheet with one end raised to pass through.
[0009] As a further improvement, a step surface is provided on the guide column, and a spring is connected between the step surface and one of the mounting parts. When the spring stretches naturally, it drives the notch part to deviate from the moving trajectory of the spring sheet.
[0010] As a further improvement, when the spring stretches naturally and one end of the spring sheet naturally tilts up, the projection of the tilted end of the spring sheet along the sliding direction of the shoe nose drill is located on the baffle.
[0011] As a further improvement, an adjusting rod is fixedly mounted on one of the mounting parts, the adjusting rod is arranged parallel to the guide column, and one end of the adjusting rod passes through the outer side of the first supporting block.
[0012] As a further improvement, two ends of the steel back on a side away from the friction body are respectively provided with positioning protrusions, and positioning blocks are fixedly mounted on the support plate, and the positioning blocks are supported on the inner sides of the corresponding positioning protrusions.
[0013] After adopting the above technical solution, the beneficial effects of the utility model are:
[0014] (1) The four corners of the base plate of the present application are respectively provided with fixing screw holes, and the base plate is connected and fixed to the test machine clamp using hexagon socket screws, and the powder metallurgy brake shoe is placed on the top of the two support plates, and the shoe nose is fixed by the shoe nose drill, and then the friction and wear test detection operation can be started. The combination of the shoe support and the test machine clamp is more firm, which can reduce the occurrence of abnormal vibration and noise during the friction and wear test;
[0015] (2) When the shoe nose bar is inserted into the slot, the left end of the spring sheet passes through the long strip hole to the right and rises again, and the spring sheet is blocked by the baffle, so that the shoe nose bar cannot be pulled out to the left, thereby preventing the shoe nose bar from accidentally falling off during the experiment, and fixing the powder metallurgy brake shoe more reliably;
[0016] (3) After the experiment is completed, the present application presses the adjusting rod to drive the baffle to move backward, so that the notch on the baffle moves to be vertically aligned with the shoe nose drill, and then the shoe nose drill can be pulled out to the left, thereby conveniently removing the powder metallurgy brake shoe from the shoe support. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] 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.
[0018] Figure 1 It is a schematic diagram of the structure of the powder metallurgy brake shoe to be fixed in the embodiment of the utility model;
[0019] Figure 2 It is a schematic diagram of the structure of an embodiment of the utility model;
[0020] Figure 3 yes Figure 1 Schematic diagram of top view;
[0021] Figure 4 yes Figure 3 Middle AA section view;
[0022] Figure 5 is an exploded schematic diagram of a first supporting block of an embodiment of the utility model;
[0023] Figure 6 It is a left side schematic diagram of the baffle of the utility model embodiment.
[0024] In the figure: 1-steel back; 2-friction body; 3-nose; 4-positioning protrusion; 5-bottom plate; 6-fixing screw hole; 7-support plate; 8-positioning groove; 9-positioning block; 10-first support block; 11-second support block; 12-guide hole; 13-slot; 14-spring sheet; 15-baffle; 16-mounting groove; 17-guide column; 18-thick column; 19-thin column; 20-short sliding rod; 21-long strip hole; 22-notch; 23-step surface; 24-spring; 25-adjusting rod; 26-nose drill; 27-mounting part. DETAILED DESCRIPTION
[0025] like Figure 1 The figure shows a powder metallurgy brake shoe on which the friction and wear experiment is to be carried out in the present application, comprising an arc-shaped steel back 1, a friction body 2 being arranged on the top of the steel back 1, a shoe nose 3 being arranged in the middle of the bottom of the steel back 1, and positioning protrusions 4 being arranged on the left and right ends of the bottom of the steel back 1 respectively.
[0026] like Figures 2 to 5 As shown, a shoe support for friction and wear test of powder metallurgy brake shoe comprises a rectangular bottom plate 5, and fixing screw holes 6 are respectively provided at the four corners of the bottom plate 5, so as to be connected and fixed with the clamp of the testing machine. Two supporting plates 7 arranged front and back oppositely are fixedly installed on the top of the bottom plate 5 by bolts, and the top of the supporting plate 7 is in an arc shape that fits the steel back 1, which is used to place the steel back 1 stably; the interval between the two supporting plates 7 is consistent with the width of the positioning protrusion 4 along the front and back direction, which can prevent the powder metallurgy brake shoe from sliding back and forth on the top of the supporting plate 7. The tops of the two supporting plates 7 are both provided with positioning grooves 8 that match the shoe nose 3; and the left and right ends of the top of the supporting plate 7 are symmetrically provided with grooves, and a positioning block 9 is embedded in the two grooves opposite to each other, and the top of the positioning block 9 is in an arc shape that matches the steel back 1, and the positioning block 9 is supported on the inner side of the corresponding positioning protrusion 4, which is used to prevent the powder metallurgy brake shoe from sliding left and right on the top of the supporting plate 7.
[0027] like Figure 4As shown, a first support block 10 is fixedly installed on the bottom plate 5 between the two support plates 7 by bolts, and a second support block 11 is also fixedly installed on the bottom plate 5 between the two support plates 7 by bolts. The first support block 10 and the second support block 11 are symmetrically arranged on the left and right sides of the shoe nose 3, and the tops of the first support block 10 and the second support block 11 are both in an arc shape that fits the steel back 1. The first support block 10 is provided with an arc-shaped guide hole 12, in which a shoe nose drill 26 matching the shoe nose 3 is slidably installed. The shoe nose drill 26 is in the shape of an arc-shaped long strip, and the guide hole 12 is in the shape of an arc matching the shoe nose drill 26, and the guide hole 12 runs through the left and right ends of the first support block 10, and the left end of the shoe nose drill 26 is bent into a hook shape for easy holding; a slot 13 for inserting the right end of the shoe nose drill 26 is provided on the left side of the second support block 11, and the slot 13 is located on the extension line of the arc where the guide hole 12 is located, and in order to enable the shoe nose drill 26 to be inserted smoothly, a bell mouth is provided at the mouth of the slot 13.
[0028] When in use, first use the hexagon socket screws to connect and fix the base plate 5 to the testing machine clamp; place the powder metallurgy brake shoe on the top of the two support plates 7, and align the shoe nose 3 with the positioning groove 8 on the two support plates 7; pass the shoe nose drill 26 to the right through the guide hole 12 and the shoe nose 3 in turn and insert it into the slot 13, fix the shoe nose 3 through the shoe nose drill 26 to prevent the powder metallurgy brake shoe from detaching from the shoe support during the experiment, and then start the friction and wear experiment detection operation.
[0029] In order to prevent the shoe nose 26 from falling off during the experiment, a spring sheet 14 is provided at the bottom of the left end of the shoe nose 26. The right end of the spring sheet 14 is fixedly installed on the lower side of the shoe nose 26 by bolts or riveted to the lower side of the shoe nose 26. The right end of the spring sheet 14 fits the shoe nose 26. The other end of the spring sheet 14 extends to the left in a direction away from the slot 13, and the left end of the spring sheet 14 tilts downward. A baffle 15 matching the spring sheet 14 is movably installed on the first support block 10. The baffle 15 blocks the spring sheet 14 to limit the right end of the shoe nose 26 from leaving the slot 13.
[0030] Specifically, a mounting groove 16 is provided at the left end of the first support block 10, and the left end of the guide hole 12 is connected to the mounting groove 16; a guide column 17 is fixedly installed in the mounting groove 16, and the guide column 17 extends rearward perpendicular to the plane where the guide hole 12 is located, and the guide column 17 includes a thick column 18 and a thin column 19 integrally formed at the front end of the thick column 18, and the ends of the thick column 18 and the thin column 19 that are away from each other are respectively embedded in the side walls of the mounting groove 16; the front and rear ends of the baffle 15 are respectively provided with mounting portions 27 bent at ninety degrees, the mounting portion 27 located at the front end is slidably mounted on the thin column 19, and the mounting portion 27 located at the rear end is slidably mounted on the thick column 18, and the mounting portions 27 at the front and rear ends are respectively provided with holes matching the thin column 19 and the thick column 18; in addition, in order to further improve the stability of the baffle 15 in sliding forward and backward, a short sliding rod 20 extending forward and backward is also embedded on the rear side wall of the mounting groove 16, and the mounting portion 27 located at the rear end is also slidably mounted on the short sliding rod 20.
[0031] like Figure 5 and Figure 6 As shown, the baffle 15 is provided with an elongated hole 21 which passes through the left and right sides, and the elongated hole 21 can allow the shoe nose drill 26 and the spring sheet 14 attached to the shoe nose drill 26 to pass through; the front end of the bottom wall of the elongated hole 21 is provided with a notch portion 22, and the notch portion 22 can allow the shoe nose drill 26 and the spring sheet 14 with one end raised to pass through.
[0032] Specifically, the baffle 15 is slid backward along the guide column 17 to move the notch 22 on the baffle 15 to be vertically aligned with the shoe nose drill 26. At this time, the shoe nose drill 26 can be inserted into the slot 13 to the right or pulled out to the left. Or slide the baffle 15 forward along the guide column 17 so that the notch 22 on the baffle 15 deviates from the bottom of the shoe nose drill 26. When the shoe nose drill 26 passes through the guide hole 12 to the right, the shoe nose drill 26 drives the spring sheet 14 to pass through the long strip hole 21 on the baffle 15 to the right and enter the mounting groove 16. When the spring sheet 14 passes through the long strip hole 21 to the right, the bottom wall of the long strip hole 21 acts on the left end of the spring sheet 14 to bend it upward and fit against the bottom of the shoe nose drill 26; when the right end of the shoe nose drill 26 is inserted into the slot 13, the spring sheet 14 completely passes through the long strip hole 21 to the right, and the left end of the spring sheet 14 tilts downward again. At this time, the projection of the tilted end of the spring sheet 14 along the sliding direction of the shoe nose drill 26 is located on the baffle 15, and the spring sheet 14 is blocked by the baffle 15, so that the shoe nose drill 26 cannot be pulled out to the left, thereby avoiding accidental falling off of the shoe nose drill 26 during the experiment.
[0033] A step surface 23 is provided at the connection between the thick column 18 and the thin column 19, and a spring 24 is connected between the step surface 23 and the mounting portion 27 located at the front end. The spring 24 is sleeved on the thin column 19. When the spring 24 stretches naturally, it drives the notch portion 22 to deviate from the moving trajectory of the spring sheet 14.
[0034] An adjustment rod 25 extending forward and backward is fixedly mounted on the mounting portion 27 at the front end. The adjustment rod 25 is arranged parallel to the guide column 17. One end of the adjustment rod 25 is screwed onto the mounting portion 27, and the other end passes forward through the outside of the first support block 10 and the outside of the front support plate 7.
[0035] When there is no external force, the spring 24 gives the baffle 15 a forward thrust, so that the front end mounting portion 27 is fitted on the front side wall of the mounting groove 16. At this time, the notch portion 22 on the baffle 15 is not vertically aligned with the shoe nose bar 26, and the shoe nose bar 26 can only be inserted into the slot 13 to the right, but the shoe nose bar 26 cannot be pulled out to the left; after the experiment is completed, the baffle 15 is driven to move backward by pressing the adjusting rod 25 backward, so that the notch portion 22 on the baffle 15 moves to be vertically aligned with the shoe nose bar 26, and then the shoe nose bar 26 can be pulled out to the left, thereby conveniently removing the powder metallurgy brake shoe from the shoe support.
[0036] 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 powder metallurgy brake shoe friction and wear test shoe, characterized by: The invention comprises a bottom plate, wherein the bottom plate is provided with a fixing screw hole, and a support plate is fixedly installed on the top of the bottom plate, the top of the support plate is in an arc shape that fits the steel back of the powder metallurgy brake shoe, a shoe nose is provided in the middle part of the back side of the steel back, and a positioning groove matching the shoe nose is provided on the top of the support plate; a first support block is fixedly installed on the bottom plate, a guide hole is provided on the first support block, and a shoe nose drill matching the shoe nose is slidably installed in the guide hole, and a second support block is also fixedly installed on the bottom plate, and a slot is provided on the second support block for inserting one end of the shoe nose drill; a spring sheet is provided on the shoe nose drill, one end of the spring sheet is fixedly installed on the shoe nose drill and fits the shoe nose drill, and the other end of the spring sheet extends in a direction away from the slot and tilts toward a side away from the shoe nose drill, and a baffle matching the spring sheet is movably installed on the first support block, and the spring sheet is blocked by the baffle to limit the shoe nose drill from leaving the slot.
2. A powder metallurgy brake shoe friction and wear test shoe as claimed in claim 1, characterized in that: A mounting groove is provided in the first support block, and the guide hole is connected to the mounting groove; a guide column is fixedly installed in the mounting groove, and mounting parts are respectively provided at both ends of the baffle, and the two mounting parts are slidably installed on the guide column; a notch is provided on the baffle for the spring sheet with one end raised to pass through.
3. A powder metallurgy brake shoe friction and wear test shoe as claimed in claim 2, characterized in that: The guide column is provided with a step surface, and a spring is connected between the step surface and one of the mounting parts. When the spring is naturally stretched, it drives the notch part to deviate from the moving track of the spring sheet.
4. A powder metallurgy brake shoe friction and wear test shoe as claimed in claim 3, characterized in that: When the spring stretches naturally and one end of the spring sheet naturally tilts up, the projection of the tilted end of the spring sheet along the sliding direction of the shoe nose drill is located on the baffle.
5. A powder metallurgy brake shoe friction and wear test shoe as claimed in claim 2, characterized in that: An adjusting rod is fixedly mounted on one of the mounting parts. The adjusting rod is arranged parallel to the guide column, and one end of the adjusting rod passes through the outer side of the first supporting block.
6. A powder metallurgy brake shoe friction and wear test shoe as claimed in claim 1, characterized in that: Positioning protrusions are respectively arranged at two ends of the steel back on a side away from the friction body, and positioning blocks are fixedly installed on the support plate, and the positioning blocks are supported on the inner sides of the corresponding positioning protrusions.