Bidirectional driving type axle fatigue test detection equipment

Abstract

The utility model discloses bidirectional driving type axle fatigue test detection equipment which comprises a rack, two limiting blocks which are arranged on the rack and are provided with limiting holes, a cross beam which is provided with an upper limiting plate and a lower limiting plate through bolts, and a servo hydraulic cylinder which is used for driving the cross beam to move up and down, the device is characterized by further comprising a two-way continuous driving unit, and the two-way continuous driving unit comprises a driving toothed plate installed at the output end of the servo hydraulic cylinder and a driving wheel installed on the rotating shaft. The axle fatigue test detection equipment is provided with a one-way continuous driving structure, the driving wheel can be driven to perform continuous two-way alternate rotation, then the axle is driven to perform continuous up-and-down swing, the test detection efficiency can be greatly improved, and abrasion of all parts of the servo hydraulic cylinder cannot be accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of axle detection, in particular to a two-way drive axle fatigue test detection device. Background Art

[0002] A train axle is a semi-axle connecting the wheels to the final drive (or differential). Its primary function is to transmit torque, ensuring the wheels rotate at a predetermined speed and direction, thereby propelling the train forward. It is a core component of the bogie, and its performance plays a decisive role in the reliability of EMU vehicles.

[0003] The existing axle fatigue test bench includes fixing parts for limiting and fixing the two ends of the axle and a servo hydraulic cylinder for driving the middle part of the axle to move up and down a certain amplitude. During actual testing, the servo hydraulic cylinder moves back and forth through its output end and drives the middle part of the axle to swing up and down. In order to speed up the swing of the axle, it is necessary to speed up the reciprocating motion of the output end of the servo hydraulic cylinder. Its rapid reciprocating motion will increase the friction between the seal and the cylinder wall. Long-term operation will accelerate the wear of the seal and reduce its sealing performance. The rapid reciprocating motion will cause the metal material of the cylinder to be subjected to repeated stress, which is easy to cause material fatigue. In short, the rapid reciprocating motion of the output end will shorten the service life of the servo hydraulic cylinder components. Therefore, it is impossible to speed up the swing of the axle by increasing the operating speed of the servo hydraulic cylinder (generally the axle needs to swing up and down at least 800,000 times), and thus it is impossible to improve the test efficiency. Therefore, the present application provides a two-way drive axle fatigue test and detection equipment to meet the needs. Utility Model Content

[0004] The purpose of this application is to provide a bidirectional drive axle fatigue test and detection equipment to solve the technical problem that the existing servo hydraulic cylinder cannot accelerate the swing of the axle, resulting in low test and detection efficiency.

[0005] To achieve the above objectives, the present application provides the following technical solution: a bidirectional drive axle fatigue test detection device, comprising a frame, two limit blocks with limit holes mounted on the frame, a crossbeam to which an upper limit plate and a lower limit plate are mounted by bolts, and a servo hydraulic cylinder for driving the crossbeam to move up and down, characterized in that it also includes a bidirectional continuous drive unit, the bidirectional continuous drive unit comprising a drive gear plate mounted at the output end of the servo hydraulic cylinder and a drive wheel mounted on the rotating shaft;

[0006] The rotating shaft is rotatably mounted on the frame, and a coaxial annular groove is provided on the end surface of the driving wheel, and a plurality of arc-shaped protrusions are circumferentially arranged on the inner ring wall of the annular groove, and a plurality of arc-shaped grooves are provided on the outer ring wall of the annular groove, and the plurality of arc-shaped grooves are arranged in a one-to-one correspondence with the plurality of arc-shaped protrusions;

[0007] A driving gear is mounted on the rotating shaft, and the driving gear plate is gear-engaged with the driving gear;

[0008] A limiting column is fixed at the upper end of the crossbeam, and the upper end of the limiting column slides through the U-shaped plate, and the U-shaped plate is installed on the frame. An L-shaped rod is fixed at the upper end of the crossbeam, and a rotating drum is rotatably provided at the end of the L-shaped rod through a bearing, and the rotating drum is located in the annular groove.

[0009] As a preferred implementation in this embodiment, coaxial annular grooves are provided on the front and rear end surfaces of the driving wheel, two groups of L-shaped rods are provided, and the rotating drums provided at the ends of the two L-shaped rods are respectively located in the corresponding annular grooves.

[0010] As a preferred implementation manner in this embodiment, the heights of the plurality of arc-shaped protrusions are inconsistent, and the recessed depths of the corresponding arc-shaped grooves are consistent with the heights of the corresponding arc-shaped protrusions.

[0011] In summary, the technical effects and advantages of the utility model are:

[0012] The utility model has a reasonable structure. The axle fatigue test detection equipment is provided with a unidirectional continuous drive structure, which can drive the driving wheel to make continuous two-way alternating rotation, thereby driving the axle to make continuous up and down swings, which can greatly improve the test efficiency and will not accelerate the wear of the components of the servo hydraulic cylinder;

[0013] In the present invention, the annular groove and the L-shaped rod are provided in two groups, the purpose of which is to share the pressure of the bearing in a single drum, prevent a single bearing from being subjected to excessive pressure, and thereby increase the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the front three-dimensional structure of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the middle and back sides;

[0017] Figure 3 for Figure 2Schematic diagram of the tooth connection structure between the middle U-shaped tooth plate and the one-way gear;

[0018] Figure 4 for Figure 3 Schematic diagram of the front view structure of the middle drive wheel.

[0019] In the figure: 1, frame; 2, limit block; 3, limit hole; 4, crossbeam; 5, upper limit plate; 6, lower limit plate; 7, servo hydraulic cylinder; 8, drive gear plate; 9, U-shaped plate; 10, limit column; 11, drive wheel; 12, annular groove; 13, arc-shaped protrusion; 14, arc-shaped groove; 1 5 , rotating drum; 16, rotating shaft; 17, L-shaped rod; 18, driving gear. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example: Reference Figure 1-4 The bidirectional drive axle fatigue test equipment shown in the figure includes a frame 1, two limit blocks 2 with limit holes 3 mounted on the frame 1, a crossbeam 4 to which an upper limit plate 5 and a lower limit plate 6 are bolted, and a servo hydraulic cylinder 7 for driving the crossbeam 4 to move up and down. It is characterized by also including a bidirectional continuous drive unit, which includes a drive gear plate 8 mounted on the output end of the servo hydraulic cylinder 7 and a drive wheel 11 mounted on a rotating shaft 16;

[0022] The rotating shaft 16 is rotatably mounted on the frame 1. A coaxial annular groove 12 is provided on the end surface of the driving wheel 11. A plurality of arc-shaped protrusions 13 are circumferentially arranged on the inner ring wall of the annular groove 12. A plurality of arc-shaped grooves 14 are provided on the outer ring wall of the annular groove 12. The plurality of arc-shaped grooves 14 are arranged in a one-to-one correspondence with the plurality of arc-shaped protrusions 13.

[0023] A driving gear 18 is mounted on the rotating shaft 16, and the driving gear plate 8 is gear-engaged with the driving gear 18;

[0024] A limiting column 10 is fixed to the upper end of the crossbeam 4, and the upper end of the limiting column 10 slides through the U-shaped plate 9, and the U-shaped plate 9 is installed on the frame 1. An L-shaped rod 17 is fixed to the upper end of the crossbeam 4, and a rotating drum 15 is rotatably provided at the end of the L-shaped rod 17 through a bearing, and the rotating drum 15 is located in the annular groove 12.

[0025] When in use (before use, the two ends of the axle are respectively inserted and installed in the limit holes 3, and then the middle part of the axle is fixed and limited between the upper limit plate 5 and the lower limit plate 6 by bolts), the output end of the servo hydraulic cylinder 7 can make a downward extending movement, and the driving gear plate 8 will drive the driving wheel 10 to rotate counterclockwise through the driving gear 18. When the driving gear plate 8 moves upward, it will drive the driving wheel 10 to rotate clockwise, so that when the output end of the servo hydraulic cylinder 7 extends and contracts (when the output end extends or contracts, the axle will correspondingly move up and down multiple times. Usually, when the output end extends or contracts, its rotating drum 16 is equivalent to walking a circle along the circular motion path), the driving wheel 10 makes continuous two-way alternating rotations, which can drive the axle to swing up and down continuously, which can greatly improve work efficiency. This structure can make the axle swing up and down multiple times when the output end of the servo hydraulic cylinder 7 extends and contracts, thereby accelerating the swing speed of the axle, improving detection efficiency, and will not accelerate the wear of the various components of the servo hydraulic cylinder 7.

[0026] It should be noted that: 1. Compared with unidirectional continuous drive, bidirectional alternating drive has a relatively simple structure and low cost; 2. A plurality of universal ball joints are arranged in a circle at the through-circular hole of the U-shaped plate 9, and the plurality of universal ball joints are in sliding contact with the outer wall of the limit column 10. The friction force between the limit column 10 and the universal ball joints can be reduced by the provided universal ball joints; 3. This drive structure improves the test detection efficiency without changing the operating speed of the original servo hydraulic cylinder 7.

[0027] As a preferred implementation in this embodiment, Figure 3 As shown, coaxial annular grooves 12 are provided on the front and rear end surfaces of the driving wheel 11 , two groups of L-shaped rods 17 are provided, and the rotating cylinders 15 provided at the ends of the two L-shaped rods 17 are respectively located in the corresponding annular grooves 12 .

[0028] The annular groove 12 and the L-shaped rod 17 are both provided in two groups, the purpose of which is to share the pressure of the bearing in a single drum 15, prevent a single bearing from being subjected to excessive pressure, and thereby increase the service life of the bearing.

[0029] As a preferred implementation in this embodiment, Figure 4 As shown, the heights of the plurality of arc-shaped protrusions 13 are inconsistent, and the recessed depths of the corresponding arc-shaped grooves 14 are consistent with the heights of the corresponding arc-shaped protrusions 13 .

[0030] The purpose is to enable the L-shaped rod 17 to drive the axle to swing up and down with different amplitudes, which more comprehensively reflects the stress state and fatigue performance of the axle in a complex operating environment, but cannot provide more accurate test results and evaluation basis.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bidirectional drive axle fatigue test detection equipment, characterized by: The invention comprises a frame (1), two limit blocks (2) with limit holes (3) mounted on the frame (1), a crossbeam (4) to which an upper limit plate (5) and a lower limit plate (6) are mounted by bolts, and a servo hydraulic cylinder (7) for driving the crossbeam (4) to move up and down, and is characterized in that it also comprises a bidirectional continuous drive unit, the bidirectional continuous drive unit comprising a drive gear plate (8) mounted at the output end of the servo hydraulic cylinder (7) and a drive wheel (11) mounted on a rotating shaft (16); The rotating shaft (16) is rotatably arranged on the frame (1), and a coaxial annular groove (12) is provided on the end surface of the driving wheel (11), and a plurality of arc-shaped protrusions (13) are circumferentially arranged on the inner ring wall of the annular groove (12), and a plurality of arc-shaped grooves (14) are provided on the outer ring wall of the annular groove (12), and the plurality of arc-shaped grooves (14) are arranged in a one-to-one correspondence with the plurality of arc-shaped protrusions (13); A driving gear (18) is mounted on the rotating shaft (16), and the driving gear plate (8) is gear-engaged with the driving gear (18); A limiting column (10) is fixed to the upper end of the crossbeam (4), and the upper end of the limiting column (10) slides through a U-shaped plate (9), and the U-shaped plate (9) is mounted on the frame (1). An L-shaped rod (17) is fixed to the upper end of the crossbeam (4), and a rotating drum (15) is rotatably provided at the end of the L-shaped rod (17) through a bearing, and the rotating drum (15) is located in the annular groove (12).

2. The bidirectional drive axle fatigue test equipment according to claim 1, characterized in that: The front and rear end surfaces of the driving wheel (11) are both provided with coaxial annular grooves (12), two groups of L-shaped rods (17) are provided, and the rotating drums (15) provided at the ends of the two L-shaped rods (17) are respectively located in the corresponding annular grooves (12).

3. The bidirectional drive axle fatigue test equipment according to claim 2, characterized in that: The convex heights of the plurality of arc-shaped protrusions (13) are inconsistent, and the concave depths of the corresponding arc-shaped grooves (14) are consistent with the convex heights of the corresponding arc-shaped protrusions (13).

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