An engine online test bench

Abstract

The present invention relates to the technical field of engine testing, and discloses an online engine testing bench, comprising an operating table, an eddy current dynamometer is fixedly connected to the upper surface of the operating table, a dual-motor linear motor is fixedly connected to the upper surface of the operating table, and a transmission clamp is fixedly connected to the upper surface of the dual-motor linear motor. In the present invention, two front and rear second guide rails slide on two left and right first guide rails at the same time to move the overall position of the engine, so that the engine can be moved conveniently so as to dock with different devices. The first mounting plate and the second mounting plate move away from or close to each other to increase or decrease the installation length, and generators of different lengths can be installed, thereby improving the applicability of the device. The first mounting plate and the second mounting plate on the left and right sides move away from or close to each other to install engines of different widths, so that the device can install more engines of different sizes, thereby further improving the applicability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of engine testing, in particular to an engine online testing platform. Background Art

[0002] The engine test bench is a device used to test and evaluate engine performance, reliability and durability. Various types of tests can be performed on the engine test bench, including performance, durability, emissions, speed, load and temperature, to ensure that the engine meets specific performance standards and safety requirements during design, manufacturing and use. Existing engine test benches are difficult to adjust the engine position after the engine is installed, and it is difficult to stably install engines of different sizes.

[0003] The patent with publication number CN214471754U discloses an engine test bench, which relates to the technical field of engine test benches, including a mounting platform and a clamping mechanism, wherein the clamping mechanism is installed on the mounting platform, and the clamping mechanism includes a driving component, two sliding components and two clamping blocks, wherein the driving component is installed on the mounting platform, and the two sliding components are both connected to the driving component, and the two clamping blocks are both slidably connected to the mounting platform, and the two sliding components respectively drive the two clamping blocks to slide relative / opposite to each other in the horizontal direction. The present application has the effect that the clamping mechanism can be used to clamp engines of different sizes and specifications. Although the patent solves the above problems, there are still problems such as troublesome adjustment, small adjustment range, and only the two sides of the engine can be clamped. Therefore, an engine online test bench is proposed to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an engine online test bench in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an engine online test bench, including an operating table, an eddy current dynamometer is fixedly connected to the upper surface of the operating table, a double-motor linear motor is fixedly connected to the upper surface of the operating table, a transmission clamp is fixedly connected to the upper surface of the double-motor linear motor, a first guide rail is fixedly connected to the inner surface of the first guide rail, a first slider is fixedly connected to the upper surface of the first slider, a second guide rail is fixedly connected to the inner surface of the second guide rail, a second slider is fixedly connected to the upper surface of the second slider A mounting plate, the upper surface of the second slider is fixedly connected to the second mounting plate, the lower surface of the second mounting plate is fixedly connected to a connecting protrusion, the front end of the connecting protrusion is fixedly connected to a limiting slide bar, the surface of the first mounting plate is fixedly connected to a slide groove protrusion, a protective device for preventing shaking during engine testing is arranged above the operating table, a wire fixing device for fixing the test line connected to the generator to prevent the test line from loosening, pulling, and winding is arranged above the operating table, the limiting slide bar is slidably connected to the inner surface of the second mounting plate, the lower surface of the second guide rail and the upper surface of the first guide rail The lower surface of the first mounting plate and the upper surface of the second guide rail are in contact with each other, the lower surface of the second mounting plate and the upper surface of the second guide rail are in contact with each other, the left and right sides of the connecting protrusion and the transmission card plate are in contact with each other, and the left and right sides of the slide groove protrusion and the transmission card plate are in contact with each other. The front and rear ends of the engine to be tested are respectively mounted on the first mounting plate and the second mounting plate, and the front and rear second guide rails are simultaneously slid on the left and right first guide rails through the first slider to move the overall position of the engine, and the front and rear second guide rails are respectively moved to make the two second guide rails move away from or close to each other. This drives the first mounting plate and the second mounting plate to move away from or closer to each other, starts the double-acting linear motor, and drives the transmission clamps on the left and right sides to move away from or closer to each other. The transmission clamps on the left and right sides then drive the first mounting plate and the second mounting plate on the left and right sides to move away from or closer to each other through the connecting protrusions and the slide groove protrusions respectively. In the process of the first mounting plate and the second mounting plate moving away from or closer to each other, the connecting protrusion drives the limiting slide bar to slide back and forth in the slide groove protrusion to limit the first mounting plate and the second mounting plate to each other, thereby preventing the engine from being pulled when the first mounting plate and the second mounting plate deviate during movement.

[0006] Preferably, the protective device includes an L-shaped protective baffle, an energy dissipator, a slide fixing block, a round-headed locking rod, a first slide sleeve, a retractable card shell, a first elastic rod, and a trapezoidal card block, wherein the L-shaped protective baffle is fixedly connected to the upper surface of the first mounting plate, the energy dissipator is fixedly connected to the side of the L-shaped protective baffle away from the transmission card plate, the slide fixing block is fixedly connected to the front side surface of the L-shaped protective baffle, the round-headed locking rod is clamped on the inner surface of the slide fixing block, the first slide sleeve is fixedly connected to the front side surface of the L-shaped protective baffle, the retractable card shell is fixedly connected to the left side surface of the first slide sleeve, the first elastic rod is fixedly connected to the arc surface of the inner wall of the retractable card shell, the trapezoidal card block is fixedly connected to the end of the first elastic rod away from the inner wall of the retractable card shell, and the protective device also The invention comprises a resistance ring, a movable sleeve ring, a second slide groove shell, a pull ring, and a limit spring, wherein the resistance ring is fixedly connected to the circumferential surface of the round head locking rod, the movable sleeve ring is sleeved on the circumferential surface of the round head locking rod, the second slide groove shell is fixedly connected to the left side of the contraction card shell, the pull ring is fixedly connected to the right end of the round head locking rod, the limit spring is fixedly connected to the right side of the slide groove fixed block, the L-shaped protective baffle is fixedly connected to the upper surface of the second mounting plate, the right end of the limit spring is fixedly connected to the left side of the pull ring, the trapezoidal block is clamped with the inner wall of the contraction card shell, and after the engine is installed on the first mounting plate and the second mounting plate, the L-shaped protective baffle can block the side of the engine, and when the engine is tested and the speed is too fast to generate vibration, the vibration force is transmitted to the exhaust On the energy dissipator, the energy dissipator converts the vibration force into heat dissipation, thereby reducing the vibration. When the left and right L-shaped protective baffles are close to each other, the L-shaped protective baffle on the right drives the round-headed locking rod to move to the left through the slide groove fixing block and inserts into the first slide groove sleeve. When the round-headed locking rod continues to move to the left, the arc surface at its left end contacts the inclined surface of the trapezoidal block and squeezes the trapezoidal block into the contraction sleeve. When the round-headed locking rod slides into the second slide groove sleeve, the elastic action of the first spring rod ejects the trapezoidal block. Since the right side of the round-headed locking rod is a flat surface, the trapezoidal block cannot be pushed, and the round-headed locking rod is stuck in the first slide groove sleeve, so that the L-shaped protective baffles on the left and right sides are locked with each other to clamp the generator. After the test is completed, the pull ring is pressed from right to left, and the pull ring drives the round-headed locking rod to move to the left and slide When the movable ring reaches the deep end of the second slide groove housing, the left inclined surface of the movable ring contacts the right inclined surface of the trapezoidal block, and the movable ring continues to slide to the right after being resisted by the trapezoidal block until it contacts the resistance ring. At this time, the movable ring can squeeze the trapezoidal block into the contraction housing, and then the movable ring moves into the second slide groove housing. At the same moment, the first elastic rod drives the trapezoidal block to pop out and get stuck between the movable ring and the resistance ring. Subsequently, the elastic reset action of the limit spring pushes the pull ring back to its original position to the right, thereby driving the round head locking rod and the movable ring to move to the right, and the trapezoidal block is squeezed into the contraction housing again through the right inclined surface of the movable ring, so that the round head locking rod is separated from the limit of the trapezoidal block, and then the engine is separated from the clamping of the L-shaped protective baffles on the left and right sides, which is convenient for subsequent engine disassembly.

[0007] Preferably, the line fixing device includes a supporting long plate, a torsion shaft, a line fixing half roller, a line fixing half roller, and an elastic telescopic rod. The supporting long plate is fixedly connected to the upper surface of the operating table, the torsion shaft is hinged on the inner surface of the supporting long plate, the line fixing half roller is fixedly connected to the circumferential surface of the torsion shaft, the elastic telescopic rod is fixedly connected to the inner surface of the line fixing half roller, and the line fixing half roller is fixedly connected to the top of the elastic telescopic rod. The line fixing device also includes a movable through groove, a sliding block, an arc clamping plate, a second elastic rod, a transmission connecting rod, a transmission shaft, and a U-shaped transmission rod. The movable through groove is opened on the line fixing half roller The arc surface of the roller, the sliding block is clamped on the inner surface of the movable through groove, the arc clamping plate is fixedly connected to one end of the sliding block close to the inner arc surface of the upper half roller of the fixed line, the second elastic rod is fixedly connected to both sides of the sliding block, the transmission connecting rod is fixedly connected to the front side of the slide groove fixing block, the transmission shaft is fixedly connected to the front side of the transmission connecting rod, the U-shaped transmission rod is fixedly connected to the arc surface of the lower half roller of the fixed line, the lower surface of the upper half roller of the fixed line and the upper surface of the lower half roller of the fixed line are in contact with each other, the arc surface of the lower half roller of the fixed line is provided with an movable through groove, the outer arc surface of the arc clamping plate and the inner arc surface of the upper half roller of the fixed line The upper and lower rollers of the fixed line are in contact with each other, the outer arc surface of the arc clamping plate and the inner arc surface of the fixed line lower half roller are in contact with each other, the second elastic rod is fixedly connected to the inner surfaces of the movable through groove on both sides, the transmission connecting rod is fixedly connected to the front side of the second slide groove shell, and the transmission shaft is slidably connected to the inner surface of the U-shaped transmission rod, the upper and lower rollers of the fixed line are pulled upward, and the upper and lower rollers of the fixed line drive the elastic telescopic rod to extend, so that a gap is generated between the upper and lower rollers of the fixed line and the fixed line, and then the test line is inserted through the through hole between the upper and lower rollers of the fixed line and the fixed line and connected to the engine, at this time, the upper and lower rollers of the fixed line are released, and the elastic reset action of the elastic telescopic rod is brought The upper half roller of the movable fixed line is reset and clamps the test line. When the test line is slightly moved by the influence of engine vibration, the force of the movement of the test line is transmitted to the arc-shaped clamping plate. After being affected, the arc-shaped clamping plate drives the sliding block to slide back and forth in the movable through groove. The reciprocating movement of the sliding block is uniformly reduced by the elastic force of the left and right second elastic rods. When the slide groove fixing block and the second slide groove housing approach each other, they drive the left and right transmission connecting rods to approach each other. The transmission connecting rod slides on the U-shaped transmission rod through the transmission shaft to drive the U-shaped transmission rod to rotate, thereby driving the lower half roller of the fixed line and the upper half roller of the fixed line to rotate and roll up the test line.

[0008] The present invention adopts the above technical solution to bring the following beneficial effects:

[0009] 1. The engine online test bench can move the overall position of the engine by sliding the front and rear second guide rails on the left and right first guide rails at the same time, which is convenient for moving the engine so as to dock with different devices. The first mounting plate and the second mounting plate can be moved away from or close to each other to increase or decrease the installation length, and generators of different lengths can be installed, which improves the applicability of the device. The first mounting plate and the second mounting plate on the left and right sides can be moved away from or close to each other to install engines of different widths, so that the device can install more engines of different sizes, further improving the applicability of the device.

[0010] 2. The engine online test bench has an L-shaped protective baffle that can block the side of the engine, further preventing the engine from tilting and also preventing the engine from tipping over or falling during installation and being damaged, thereby improving the safety of the engine during installation. The energy absorber converts the force of vibration into heat dissipation, thereby reducing vibration and preventing surface wear during engine testing, thereby improving the safety of the engine during testing. The L-shaped protective baffles on the left and right sides lock each other to clamp the generator, preventing the engine from vibrating too much and escaping from the restriction of the L-shaped protective baffle, thereby further improving the safety of the engine during testing.

[0011] 3. For the online test bench of the engine, the elastic reset function of the elastic telescopic rod drives the upper roller of the fixed line to reset and clamp the test line to prevent the test line from moving around and causing entanglement, which affects the test efficiency. The reciprocating movement of the sliding block is affected by the elastic force of the two second elastic rods on the left and right to reduce at a uniform speed, thereby reducing the movement amplitude of the test line, avoiding rapid wear of the test line, and improving the service life and efficiency of the test line. The lower roller of the fixed line and the upper roller of the fixed line rotate to roll up the test line to prevent the test line from being loosened after being pulled during engine testing, further improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the side and bottom cross-sectional three-dimensional structure of the first mounting plate of the present invention;

[0014] Figure 3 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the protective device of the present invention;

[0015] Figure 4 For the present invention Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0016] Figure 5 It is a schematic diagram of the front side stereoscopic structure of the wire fixing device of the present invention;

[0017] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of B;

[0018] Figure 7 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the upper half roller and the elastic telescopic rod of the wire fixing device of the present invention;

[0019] Figure 8 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the wire fixing upper half roller, the arc-shaped clamping plate and the sliding clamping block of the present invention.

[0020] In the figure: 1, operating table; 2, eddy current dynamometer; 3, double-acting linear motor; 4, transmission card plate; 5, first guide rail; 51, first slider; 52, second guide rail; 53, second slider; 54, first mounting plate; 55, second mounting plate; 56, connecting protrusion; 57, slide groove protrusion; 58, limit slide rod; 6, protective device; 61, L-shaped protective baffle; 62, energy dissipator; 63, slide groove fixing block; 64, round head locking rod; 65, first slide groove housing; 66, shrinkage card housing; 67. First spring rod; 68. Trapezoidal block; 69. Resistance ring; 610. Movable sleeve ring; 611. Second slide slot housing; 612. Pull ring; 613. Limit spring; 7. Wire fixing device; 71. Support long plate; 72. Torsion shaft; 73. Lower half roller for fixing line; 74. Upper half roller for fixing line; 75. Elastic telescopic rod; 76. Movable through slot; 77. Sliding block; 78. Arc-shaped splint; 79. Second spring rod; 710. Transmission connecting rod; 711. Transmission shaft; 712. U-shaped transmission rod. DETAILED DESCRIPTION

[0021] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 8An embodiment of the present invention is: an engine online test bench, comprising an operating table 1, an eddy current dynamometer 2 is fixedly connected to the upper surface of the operating table 1, a double-motor linear motor 3 is fixedly connected to the upper surface of the operating table 1, a transmission card plate 4 is fixedly connected to the upper surface of the double-motor linear motor 3, a first guide rail 5 is fixedly connected to the inner surface of the first guide rail 5, a first slider 51 is slidably connected to the inner surface of the first slider 51, a second guide rail 52 is fixedly connected to the upper surface of the first slider 51, a second slider 53 is slidably connected to the inner surface of the second guide rail 52, a first mounting plate 54 is fixedly connected to the upper surface of the second slider 53, a second mounting plate 55 is fixedly connected to the upper surface of the second slider 53, a connecting protrusion 56 is fixedly connected to the lower surface of the second mounting plate 55, a front end of the connecting protrusion 56 is fixedly connected to a limiting sliding rod 58, a slide groove protrusion 57 is fixedly connected to the surface of the first mounting plate 54, and the front and rear second guide rails 52 slide on the left and right first guide rails 5 at the same time to move the overall position of the engine, so as to facilitate the movement of the engine so as to dock with different devices. The first mounting plate 54 and the second mounting plate 55 move away from or close to each other to increase or decrease the installation length, and generators of different lengths can be installed, thereby improving the applicability of the device. A protective device 6 for preventing the engine from shaking during testing is provided above the operating platform 1. A wire fixing device 7 for fixing the test line connected to the generator to prevent the test line from loosening, pulling, or winding is provided above the operating platform 1. The limiting slide bar 58 is slidably connected to the inner surface of the second mounting plate 55. The lower surface of the second guide rail 52 and the upper surface of the first guide rail 5 are in contact with each other, the lower surface of the first mounting plate 54 and the upper surface of the second guide rail 52 are in contact with each other, the lower surface of the second mounting plate 55 and the upper surface of the second guide rail 52 are in contact with each other, the left and right sides of the connecting protrusion 56 are in contact with the transmission card plate 4, the left and right sides of the slide groove protrusion 57 are in contact with the transmission card plate 4, and the first mounting plates 54 and the second mounting plates 55 on the left and right sides move away from or close to each other to install engines of different widths, so that the device can install more engines of different sizes, thereby further improving the applicability of the device.

[0023] Working principle: The front and rear ends of the engine to be tested are respectively mounted on the first mounting plate 54 and the second mounting plate 55, and the front and rear second guide rails 52 are simultaneously slid on the left and right first guide rails 5 through the first slider 51 to move the overall position of the engine, so that the engine can be moved conveniently for docking with different devices, and the front and rear second guide rails 52 are respectively moved to make the two second guide rails 52 move away from or approach each other, thereby driving the first mounting plate 54 and the second mounting plate 55 to move away from or approach each other, thereby increasing or decreasing the installation length to install generators of different lengths, thereby improving the applicability of the device, and starting the double-acting linear motor 3, which drives the transmission card plates 4 on the left and right sides to move away from or approach each other, and the left and right sides The transmission card plate 4 on the side then drives the first mounting plate 54 and the second mounting plate 55 on the left and right sides to move away from or closer to each other through the connecting protrusion 56 and the slide groove protrusion 57, so that engines of different widths can be installed, so that the device can install more engines of different sizes, further improving the applicability of the device. In the process of the first mounting plate 54 and the second mounting plate 55 moving away from or approaching each other, the connecting protrusion 56 drives the limiting slide bar 58 to slide back and forth in the slide groove protrusion 57 to limit the first mounting plate 54 and the second mounting plate 55 to each other, preventing the engine from being pulled when the first mounting plate 54 and the second mounting plate 55 deviate during the movement, thereby improving the installation accuracy and avoiding the difficulty in docking with the test device due to the engine tilting after movement.

[0024] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, the protective device 6 includes an L-shaped protective baffle 61, an energy dissipator 62, a slide fixing block 63, a round head locking rod 64, a first slide housing 65, a retractable card housing 66, a first elastic rod 67, and a trapezoidal card block 68. The L-shaped protective baffle 61 is fixedly connected to the upper surface of the first mounting plate 54, the energy dissipator 62 is fixedly connected to the side of the L-shaped protective baffle 61 away from the transmission card plate 4, the slide fixing block 63 is fixedly connected to the front side of the L-shaped protective baffle 61, and the round head locking rod 64 is fixedly connected to the front side of the L-shaped protective baffle 61. The first slide slot housing 65 is fixedly connected to the front side of the L-shaped protective baffle 61, the retractable housing 66 is fixedly connected to the left side of the first slide slot housing 65, the first spring rod 67 is fixedly connected to the arc surface of the inner wall of the retractable housing 66, and the trapezoidal block 68 is fixedly connected to the end of the first spring rod 67 away from the inner wall of the retractable housing 66. The L-shaped protective baffle 61 can block the side of the engine, further preventing the engine from tilting and preventing the engine from falling or falling during the installation process. For the safety of the engine during installation, the protective device 6 also includes a resistance ring 69, a movable collar 610, a second slide housing 611, a pull ring 612, and a limit spring 613. The resistance ring 69 is fixedly connected to the circumferential surface of the round head lock rod 64, the movable collar 610 is sleeved on the circumferential surface of the round head lock rod 64, the second slide housing 611 is fixedly connected to the left side of the shrinkage card housing 66, the pull ring 612 is fixedly connected to the right end of the round head lock rod 64, the limit spring 613 is fixedly connected to the right side of the slide fixed block 63, the L-shaped protective baffle 61 and the first The upper surfaces of the two mounting plates 55 are fixedly connected, the right end of the limit spring 613 and the left side of the pull ring 612 are fixedly connected, the trapezoidal block 68 and the inner wall of the shrinkage card shell 66 are clamped, and the energy dissipator 62 converts the vibration force into heat dissipation, thereby reducing vibration and preventing surface wear during engine testing, thereby improving the safety of engine testing. The L-shaped protective baffles 61 on the left and right sides are locked with each other to clamp the generator to prevent the engine from vibrating too much and breaking away from the restriction of the L-shaped protective baffle 61, thereby further improving the safety of the engine during testing.

[0025] Working principle: After the engine is installed on the first mounting plate 54 and the second mounting plate 55, the L-shaped protective baffle 61 can block the side of the engine, further preventing the engine from tilting and preventing the engine from being damaged after tipping over or falling during the installation process, thereby improving the safety of the engine during installation. When the engine is tested and the speed is too fast to generate vibration, the vibration force is transmitted to the energy absorber 62, and the energy absorber 62 converts the vibration force into heat dissipation, thereby reducing the vibration and preventing surface wear during the engine test, thereby improving the safety of the engine during the test. The left and right L-shaped protective baffles 61 are close to each other. When the round-headed locking rod 64 is moved to the left through the slide groove fixing block 63 and inserted into the first slide groove housing 65, the round-headed locking rod 64 continues to move to the left, and the arc surface of the left end of the round-headed locking rod 64 contacts the inclined surface of the trapezoidal card block 68 and squeezes the trapezoidal card block 68 into the retractable card housing 66. When the round-headed locking rod 64 slides into the second slide groove housing 611, the elastic action of the first elastic rod 67 ejects the trapezoidal card block 68. Since the right side of the round-headed locking rod 64 is a flat surface, the trapezoidal card block 68 cannot be pushed, and the round-headed locking rod 64 is stuck in the first slide groove housing 65, so that the L-shaped protective baffles 61 on the left and right sides are The mutual locking clamps the generator to prevent the engine from vibrating too much and breaking away from the restriction of the L-shaped protective baffle 61, further improving the safety of the engine during testing. After the test is completed, the pull ring 612 is pressed from right to left, and the pull ring 612 drives the round head locking rod 64 to move to the left and slide to the deep of the second slide groove shell 611. At this time, the left inclined surface of the movable ring 610 contacts the right inclined surface of the trapezoidal block 68, and the movable ring 610 continues to slide to the right after being resisted by the trapezoidal block 68 until it contacts the resistance ring 69. At this time, the movable ring 610 can squeeze the trapezoidal block 68 into the shrinkage shell 66, and then After that, the movable collar 610 moves into the second slide groove housing 611. At the same moment, the first elastic rod 67 drives the trapezoidal block 68 to pop out and get stuck between the movable collar 610 and the abutment ring 69. Then, the elastic restoring effect of the limit spring 613 pushes the pull ring 612 back to its original position to the right, thereby driving the round head locking rod 64 and the movable collar 610 to move to the right. Through the right side inclined surface of the movable collar 610, the trapezoidal block 68 is squeezed into the retractable housing 66 again, so that the round head locking rod 64 is separated from the limit of the trapezoidal block 68, and then the engine is separated from the clamping of the L-shaped protective baffles 61 on the left and right sides, which is convenient for the subsequent disassembly of the engine.

[0026] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, the line fixing device 7 includes a supporting long plate 71, a torsion shaft 72, a line fixing upper half roller 73, a line fixing upper half roller 74, and an elastic telescopic rod 75. The supporting long plate 71 is fixedly connected to the upper surface of the operating table 1, the torsion shaft 72 is hinged on the inner surface of the supporting long plate 71, the line fixing lower half roller 73 is fixedly connected to the circumferential surface of the torsion shaft 72, the elastic telescopic rod 75 is fixedly connected to the inner surface of the line fixing lower half roller 73, the line fixing upper half roller 74 is fixedly connected to the top of the elastic telescopic rod 75, and the elastic resetting action of the elastic telescopic rod 75 is The fixing line device 7 is used to drive the upper roller 74 of the fixed line to reset and clamp the test line to prevent the test line from moving around and causing entanglement that affects the test effect. The fixing line device 7 also includes a movable through groove 76, a sliding block 77, an arc-shaped clamping plate 78, a second elastic rod 79, a transmission connecting rod 710, a transmission shaft 711, and a U-shaped transmission rod 712. The movable through groove 76 is opened on the arc surface of the upper roller 74 of the fixed line, the sliding block 77 is clamped on the inner surface of the movable through groove 76, the arc-shaped clamping plate 78 is fixedly connected to one end of the sliding block 77 close to the inner arc surface of the upper roller 74 of the fixed line, and the second elastic rod 79 is fixedly connected to the sliding block On both sides of 77, the transmission connecting rod 710 is fixedly connected to the front side of the slide groove fixing block 63, the transmission shaft 711 is fixedly connected to the front side of the transmission connecting rod 710, the U-shaped transmission rod 712 is fixedly connected to the arc surface of the fixed line lower half roller 73, the lower surface of the fixed line upper half roller 74 and the upper surface of the fixed line lower half roller 73 are in contact with each other, and the arc surface of the fixed line lower half roller 73 is provided with a movable through groove 76, the outer arc surface of the arc clamping plate 78 and the inner arc surface of the fixed line upper half roller 74 are in contact with each other, the outer arc surface of the arc clamping plate 78 and the inner arc surface of the fixed line lower half roller 73 are in contact with each other, the second elastic rod 79 and the movable through groove The two sides of the inner surface of 76 are fixedly connected, the transmission connecting rod 710 is fixedly connected to the front side of the second slide groove housing 611, the transmission shaft 711 and the inner surface of the U-shaped transmission rod 712 are slidably connected, and the reciprocating movement of the sliding block 77 is affected by the elastic force of the two left and right second elastic rods 79 to uniformly reduce the movement amplitude of the test line, thereby avoiding rapid wear of the test line and improving the service life and effectiveness of the test line. The fixed line lower half roller 73 and the fixed line half roller 74 rotate to roll up the test line to prevent the test line from being loosened after being pulled during engine testing, thereby further improving the test effectiveness.

[0027] Working principle: Pull the fixed line upper half roller 74 upwards, and the fixed line upper half roller 74 drives the elastic telescopic rod 75 to extend, so that a gap is generated between the fixed line upper half roller 74 and the fixed line lower half roller 73, and then the test line is inserted through the through hole between the fixed line upper half roller 74 and the fixed line lower half roller 73 and connected to the engine. At this time, loosen the fixed line upper half roller 74, and the elastic reset effect of the elastic telescopic rod 75 drives the fixed line upper half roller 74 to reset and clamp the test line to prevent the test line from moving around and causing entanglement and affecting the test effect. When the test line is slightly moved by the vibration of the engine, the force of the test line movement is transmitted to the arc clamping plate 78. After the arc clamping plate 78 is affected, it drives the sliding block 77 to move in the activity The sliding block 77 slides back and forth in the through groove 76, and the reciprocating movement of the sliding block 77 is affected by the elastic force of the left and right second elastic rods 79 to uniformly reduce, thereby reducing the movement amplitude of the test line, avoiding rapid wear of the test line, and improving the service life and effectiveness of the test line. When the slide groove fixing block 63 and the second slide groove shell 611 approach each other, they drive the left and right transmission connecting rods 710 to approach each other, and the transmission connecting rod 710 then slides on the U-shaped transmission rod 712 through the transmission shaft 711 to drive the U-shaped transmission rod 712 to rotate, thereby driving the fixed line lower half roller 73 and the fixed line half roller 74 to rotate to roll up the test line, preventing the test line from being loosened after being pulled during engine testing, and further improving the test effectiveness.

[0028] The present invention provides an engine online test bench. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. An engine online test bench, comprising an operating table (1), characterized in that: The upper surface of the operating table (1) is fixedly connected to an eddy current dynamometer (2), the upper surface of the operating table (1) is fixedly connected to a double-motor linear motor (3), the upper surface of the double-motor linear motor (3) is fixedly connected to a transmission card plate (4), the upper surface of the operating table (1) is fixedly connected to a first guide rail (5), the inner surface of the first guide rail (5) is slidably connected to a first slider (51), the upper surface of the first slider (51) is fixedly connected to a second guide rail (52), the inner surface of the second guide rail (52) is slidably connected to a second slider (53), the upper surface of the second slider (53) is fixedly connected to a first mounting plate (54), the upper surface of the second slider (53) is fixedly connected to a second mounting plate (55), the lower surface of the second mounting plate (55) is fixedly connected to a connecting protrusion (56), the front end of the connecting protrusion (56) is fixedly connected to a limiting slide rod (58), and the surface of the first mounting plate (54) is fixedly connected to a slide groove protrusion (57); A protective device (6) is provided above the operating table (1) for preventing the engine from shaking during testing, and a wire fixing device (7) is provided above the operating table (1) for fixing a test wire connected to the generator to prevent the test wire from loosening, pulling or entanglement; The protective device (6) comprises an L-shaped protective baffle (61), an energy dissipator (62), a slide groove fixing block (63), a round head locking rod (64), a first slide groove housing (65), a retractable housing (66), a first elastic rod (67), and a trapezoidal block (68). The L-shaped protective baffle (61) is fixedly connected to the upper surface of the first mounting plate (54), the energy dissipator (62) is fixedly connected to a side of the L-shaped protective baffle (61) away from the transmission card plate (4), and the slide groove fixing block (63) is fixedly connected to the upper surface of the first mounting plate (54). The first slide slot housing (65) is fixedly connected to the front side of the L-shaped protective baffle (61), the round head locking rod (64) is clamped on the inner surface of the slide slot fixing block (63), the first slide slot housing (65) is fixedly connected to the front side of the L-shaped protective baffle (61), the retractable housing (66) is fixedly connected to the left side of the first slide slot housing (65), the first elastic rod (67) is fixedly connected to the arc surface of the inner wall of the retractable housing (66), and the trapezoidal block (68) is fixedly connected to the end of the first elastic rod (67) away from the inner wall of the retractable housing (66); The line fixing device (7) comprises a supporting long plate (71), a twisting shaft (72), a line fixing lower half roller (73), a line fixing upper half roller (74), and an elastic telescopic rod (75); the supporting long plate (71) is fixedly connected to the upper surface of the operating table (1); the twisting shaft (72) is hinged to the inner surface of the supporting long plate (71); the line fixing upper half roller (73) is fixedly connected to the circumferential surface of the twisting shaft (72); the elastic telescopic rod (75) is fixedly connected to the inner surface of the line fixing lower half roller (73); and the line fixing upper half roller (74) is fixedly connected to the top of the elastic telescopic rod (75); The line fixing device (7) further comprises a movable through slot (76), a sliding block (77), an arc-shaped clamping plate (78), a second elastic rod (79), a transmission connecting rod (710), a transmission shaft (711), and a U-shaped transmission rod (712); the movable through slot (76) is provided on the arc surface of the upper half roller (74) of the line fixing device; the sliding block (77) is clamped on the inner surface of the movable through slot (76); the arc-shaped clamping plate (78) is fixedly connected to one end of the sliding block (77) close to the inner arc surface of the upper half roller (74) of the line fixing device; the second elastic rod (79) is fixedly connected to both sides of the sliding block (77); the transmission connecting rod (710) is fixedly connected to the front side surface of the sliding slot fixing block (63); the transmission shaft (711) is fixedly connected to the front side surface of the transmission connecting rod (710); and the U-shaped transmission rod (712) is fixedly connected to the arc surface of the lower half roller (73) of the line fixing device.

2. The engine online test bench according to claim 1, characterized in that: The limiting slide bar (58) is slidably connected to the inner surface of the second mounting plate (55); the lower surface of the second guide rail (52) and the upper surface of the first guide rail (5) are in contact with each other; the lower surface of the first mounting plate (54) and the upper surface of the second guide rail (52) are in contact with each other; the lower surface of the second mounting plate (55) and the upper surface of the second guide rail (52) are in contact with each other; the left and right sides of the connecting protrusion (56) and the transmission card plate (4) are in contact with each other; and the left and right sides of the sliding groove protrusion (57) and the transmission card plate (4) are in contact with each other.

3. The engine online test bench according to claim 2, characterized in that: The protective device (6) also includes a resistance ring (69), a movable ring (610), a second slide groove housing (611), a pull ring (612), and a limit spring (613). The resistance ring (69) is fixedly connected to the circumferential surface of the round head locking rod (64), the movable ring (610) is sleeved on the circumferential surface of the round head locking rod (64), the second slide groove housing (611) is fixedly connected to the left side of the contraction card housing (66), the pull ring (612) is fixedly connected to the right end of the round head locking rod (64), and the limit spring (613) is fixedly connected to the right side of the slide groove fixing block (63).

4. The engine online test bench according to claim 3, characterized in that: The L-shaped protective baffle (61) is fixedly connected to the upper surface of the second mounting plate (55), the right end of the limit spring (613) is fixedly connected to the left side of the pull ring (612), and the trapezoidal clamping block (68) is clamped to the inner wall of the shrinkable clamping shell (66).

5. The engine online test bench according to claim 4, characterized in that: The lower surface of the fixed line upper roller (74) and the upper surface of the fixed line lower roller (73) are in contact with each other, the arc surface of the fixed line lower roller (73) is provided with a movable through groove (76), the outer arc surface of the arc clamping plate (78) and the inner arc surface of the fixed line upper roller (74) are in contact with each other, the outer arc surface of the arc clamping plate (78) and the inner arc surface of the fixed line lower roller (73) are in contact with each other, the second elastic rod (79) and the inner surface of the movable through groove (76) are fixedly connected, the transmission connecting rod (710) and the front side surface of the second slide groove housing (611) are fixedly connected, and the transmission shaft (711) and the inner surface of the U-shaped transmission rod (712) are slidably connected.

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