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CN-224209783-U - Multipurpose test fixture for leaf springs in locomotive braking system

CN224209783UCN 224209783 UCN224209783 UCN 224209783UCN-224209783-U

Abstract

The utility model discloses a multipurpose test fixture for leaf springs in locomotive braking systems, which comprises a bottom plate, wherein a supporting component for supporting the middle part of a leaf spring body is arranged in the middle of the upper end surface of the bottom plate, a supporting and pressing component for supporting and pressing the right end part of the leaf spring body is arranged at the right end of the upper end surface of the bottom plate, a limiting and pressing component for pressing the left end part of the leaf spring body downwards and keeping a certain deformation distance is detachably arranged at the left end of the upper end surface of the bottom plate, and the multipurpose test fixture also comprises a roller component arranged on an installation seat of the leaf spring body during testing. The leaf spring testing device can test three performances of elastic modulus, deformation and fatigue resistance, realizes a multipurpose function, effectively reduces the types of clamps used in the leaf spring performance test, greatly reduces the cost input expense of the clamps, can test the three performances of the elastic modulus, the deformation and the fatigue resistance in sequence after the leaf spring is fixed on the clamps, effectively reduces the labor cost, remarkably improves the testing efficiency, and is beneficial to meeting the large-batch delivery demand of the leaf springs.

Inventors

  • CHEN JIEWEI
  • ZHANG JING

Assignees

  • 常州协发机械制造有限公司

Dates

Publication Date
20260508
Application Date
20250515

Claims (6)

  1. 1. A multipurpose test fixture for leaf springs in locomotive braking systems, which is characterized by comprising a base plate (1), bottom plate (1) up end middle part be equipped with be used for supporting leaf spring body (A) at the supporting component (2) at middle part, bottom plate (1) up end right-hand member is equipped with and is used for supporting the support hold-down subassembly that compresses tightly leaf spring body (A) right-hand member portion, bottom plate (1) up end left end detachable installs spacing crimping subassembly (8) that are used for pushing down leaf spring body (A) left end portion and keep certain deformation distance, still install roller bearing assembly (5) on leaf spring body (A) mount pad (B) during the test.
  2. 2. The multipurpose test fixture for leaf springs in locomotive brake systems according to claim 1, wherein the supporting assembly (2) comprises a supporting table I (2-1) and a rotating shaft (2-2), the supporting table I (2-1) is fixedly arranged in the middle of the upper end face of the bottom plate (1), the upper end face of the supporting table I (2-1) is provided with an arc-shaped groove (2-1 a) penetrating through the front end face and the rear end face and having an upward opening, the rotating shaft (2-2) is movably embedded in the arc-shaped groove (2-1 a), and the upper side face of the rotating shaft (2-2) protrudes out of the upper port of the arc-shaped groove (2-1 a); The supporting and compacting assembly comprises a supporting table II (3) and a compacting assembly I (4), wherein the supporting table II (3) is fixedly arranged at the right end of the upper end face of the bottom plate (1), an upward-opening countersunk groove (7) is formed in the middle of the upper end face of the supporting table II (3), a threaded hole II (7-1) is formed in the center of the bottom of the countersunk groove (7), the compacting assembly I (4) comprises a crimping sleeve (4-1) which is inserted and arranged in the countersunk groove (7) in a plugging manner and a locking bolt (4-2) which is connected in the crimping sleeve (4-1) in a penetrating manner, the upper end of the crimping sleeve (4-1) is provided with an annular eave body (4-1 a) which extends towards the outer periphery and is overlapped on the upper end face of the supporting table II (3), and the lower end of the locking bolt (4-2) is in the threaded hole II (7-1) in a screwed manner. The limiting crimping assembly (8) comprises two supporting tables III (8-1), a pressing plate (8-2) and two pressing assemblies II (9) which are the same in structure as the pressing assemblies I (4), wherein one supporting table III (8-1) is fixedly arranged on the front side of the left end of the upper end face of the bottom plate (1), the other supporting table III (8-1) is correspondingly and fixedly arranged on the rear side of the left end of the upper end face of the bottom plate (1), an object placing cavity (8-3) for movably penetrating through a leaf spring mounting seat (B) during deformation testing is formed between the two supporting tables III (8-1), a countersunk groove (7) with an upward opening is correspondingly arranged in the middle of the upper end face of the supporting table III (8-1), a threaded hole II (7-1) is formed in the center of the bottom of the countersunk groove (7), two ends of the pressing plate (8-2) are respectively provided with a through hole III, one end of the pressing plate (8-2) is fixedly connected to the corresponding through hole III and the inner part of the countersunk groove (7) and the other end face (8-1) and corresponds to the countersunk groove (8-1) and the other end face (8-1) and is fixedly connected to the other end face III (8-1) through the other countersunk groove (9), the annular eave body (4-1 a) at the upper end of the pressure sleeve (4-1) is lapped on the upper end face of the pressure plate (8-2); The roller assembly (5) comprises a shaft body (5-1), a bearing (5-2) and two spacer sleeves (5-3), wherein the shaft body (5-1) is matched with a through hole II (B-2) on a leaf spring, the middle part of the shaft body (5-1) is in interference fit connection with the inner ring of the bearing (5-2), the outer diameter of the bearing (5-2) is larger than the thickness of a leaf spring mounting seat (B), the two spacer sleeves (5-3) are movably connected with the shaft body (5-1) in a penetrating manner and are adjacently located on two sides of the bearing (5-2), the two spacer sleeves (5-3) are corresponding to the inner ring of the bearing (5-2), annular grooves (5-1 a) are respectively formed in the outer circumferential surfaces of two ends of the shaft body (5-1), and clamp springs (5-4) are clamped in the annular grooves (5-1 a).
  3. 3. The multipurpose test fixture for leaf springs in a locomotive brake system according to claim 2, wherein the support assembly (2) further comprises two blocking pieces (2-3), one of the blocking pieces (2-3) is fixedly arranged on the front end face of the first support table (2-1), the other blocking piece (2-3) is fixedly arranged on the rear end face of the first support table (2-1), and the upper side edges of the two blocking pieces (2-3) are correspondingly abutted against the front end face and the rear end face of the arc-shaped groove (2-1 a).
  4. 4. A multipurpose test jig for leaf springs in a locomotive brake system as claimed in claim 3, wherein said blocking piece (2-3) has mounting holes, said first support stand (2-1) has screw holes three adjacent to the lower side of the arc-shaped groove (2-1 a) on the front and rear end surfaces thereof, respectively, and said blocking piece (2-3) is fixedly mounted on the front end surface or rear end surface of the first support stand (2-1) by bolts (6) penetrating through the mounting holes and the screw holes three on the front end surface or rear end surface of the first support stand (2-1).
  5. 5. The multipurpose test fixture for leaf springs in a locomotive brake system according to claim 4, wherein the upper end face of the bottom plate (1) is provided with a plurality of threaded holes I (1-1), the supporting table I (2-1), the supporting table II (3) and the supporting table III (8-1) are respectively provided with mounting holes penetrating through the upper end face and the lower end face, and the supporting table I, the supporting table II and the supporting table III are respectively fixed on the upper end face of the bottom plate (1) through bolts (6) penetrating through the corresponding mounting holes and the threaded holes I (1-1).
  6. 6. The multipurpose test fixture for leaf springs in locomotive brake systems according to claim 5, wherein the left end and the right end of the bottom plate (1) are respectively provided with a positioning hole (1-2) penetrating through the plate body, and the left end and/or the right end of the upper end face of the bottom plate (1) are/is fixedly provided with a hanging ring (1-3).

Description

Multipurpose test fixture for leaf springs in locomotive braking system Technical Field The utility model relates to the technical field of leaf spring test clamps, in particular to a multipurpose test clamp for a leaf spring in a locomotive braking system. Background The train braking system is one of important safety equipment on a train, and leaf springs are parts used on a braking assembly in the train braking system. As shown in FIG. 1, the leaf spring comprises a leaf spring body A, wherein the right end of the leaf spring body A is provided with a through hole A-1 penetrating through the upper end face and the lower end face of the leaf spring body A, the left end of the leaf spring body A is fixedly provided with a mounting seat B in a riveting mode, two arm blocks B-1 and a U-shaped groove B-3 positioned between the two arm blocks B-1 are correspondingly arranged on the front side and the rear side of one end of the mounting seat B, which is away from the leaf spring body A, and two through holes B-2 penetrating through the front end face and the rear end face are correspondingly arranged on the two arm blocks B-1. After the leaf spring is processed, three performance tests of deformation, elastic modulus and fatigue resistance under specific time are required to be carried out, three specific test clamps are required to be customized and test equipment corresponding to the three test clamps is required to be configured when the three performance tests are carried out on the leaf spring at present, and three test procedures of forming variable, elastic modulus and fatigue resistance are required to be divided. The testing method has the problems that three specific testing fixtures are customized and testing equipment corresponding to the three testing fixtures is configured, the required equipment cost is high, three testing procedures of forming variable, elastic modulus and fatigue resistance are divided, the occupied labor cost is high, the overall testing efficiency of the three performances is low, and the delivery requirement of a large quantity of leaf springs is difficult to meet. Therefore, the utility model provides a multipurpose test fixture for a leaf spring in a locomotive braking system, so as to solve the technical problems. Disclosure of Invention The utility model aims to overcome the defects existing in the prior art and provide a multipurpose test clamp for a leaf spring in a locomotive braking system, when the multipurpose test clamp is used, a right end part of the leaf spring with a through hole I is fixedly pressed on a supporting and pressing assembly, the middle part of the leaf spring is lapped on the supporting assembly, so that the left end part of the leaf spring with a mounting seat is suspended at the left side of the supporting assembly, the multipurpose clamp loaded with the leaf spring to be tested is mounted on a working platform of an electronic universal tester to perform elastic modulus test and deformation test, or the multipurpose clamp loaded with the leaf spring to be tested is mounted on the working platform of a fatigue-resistant tester to perform fatigue resistance test, namely the multipurpose clamp can perform three performance tests of elastic modulus, deformation quantity and fatigue resistance on the leaf spring, so that a multipurpose function is realized, the variety of the clamp used in the performance test of the leaf spring is effectively reduced, the cost input cost of the clamp is greatly reduced, the three performance tests of the leaf spring can be sequentially performed after the leaf spring is fixed on the clamp, the fixing time of the leaf spring on the clamp is greatly shortened, the total cost of the leaf spring can be remarkably shortened, the total cost of the test performance is remarkably reduced, the total cost of the test is remarkably reduced, and the cost of the test is remarkably required is remarkably reduced, and the performance is remarkably tested. In order to achieve the above purpose, the technical scheme of the utility model is to design a multipurpose test fixture for a leaf spring in a locomotive braking system, which comprises a bottom plate, wherein the middle part of the upper end surface of the bottom plate is provided with a supporting component for supporting the middle part of a leaf spring body, the right end of the upper end surface of the bottom plate is provided with a supporting and pressing component for supporting and pressing the right end part of the leaf spring body, the left end of the upper end surface of the bottom plate is detachably provided with a limiting and pressing component for pressing the left end part of the leaf spring body downwards and keeping a certain deformation distance, and the multipurpose test fixture also comprises a roller component which is arranged on an installation seat of the leaf spring body during testing. The multipurpose test fixture for the leaf spring in the loco