An engine test bench with power transmission

Abstract

The present invention discloses an engine test bench with power transmission, which relates to the technical field of engine testing. The present invention includes a base, on the top of the base is provided a hollow frame, at the bottom edge of the inner wall of the base are provided two transmission components, and the transmission components are driven by a peripheral motor. The two transmission components are symmetrically distributed with respect to the axis of the base. Inside the transmission component is provided a chain conveyor belt, and the chain conveyor belt passes through the inside of the hollow frame. On the inner wall of the hollow frame is provided a support plate, the top of the support plate contacts the top of the inner wall of the chain conveyor belt, at the top edge of the support plate is provided a detection table, and on the top of the detection table is provided a test component. The present invention relies on the U-shaped rubber plate to increase the contact area between the arc-shaped clamping plate and the engine while being able to closely fit the non-smooth outer wall of the engine, preventing the connection end of the test component from vibrating synchronously due to the vibration generated after the engine starts and runs, thereby reducing the accuracy of the detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of engine testing, and particularly to an engine test bench with power transmission. Background Art

[0002] An engine is a general term for a machine that can convert other forms of energy into mechanical energy. Engines usually include internal combustion engines, external combustion engines, jet engines, electric motors, etc. The internal combustion engines commonly seen in life usually convert chemical energy into mechanical energy, thus bringing great convenience to the development of people's lives.

[0003] The patent with the patent announcement number CN211234972U discloses an engine test bench with power transmission, including a bench body. Both sides of the bottom end of the bench body are provided with support plates. A chain conveyor belt is arranged between the two support plates. A through hole is opened in the middle of the top end of the bench body. A first storage groove communicated with the through hole is opened inside the bench body. A first cylinder is horizontally installed on the groove wall of the first storage groove. The output end of the first cylinder is provided with a bottom plate. This patent facilitates the transportation of the engine through the chain conveyor belt, can realize continuous detection, and greatly improves the efficiency of engine detection. Through the clamping mechanism provided, since the clamping mechanism includes two pressure rods, driven by the second cylinder, the pressure rods can swing inside the notch, so that the two pressure rods can open and close, and thus the clamping requirements of engines of different sizes can be met, and the applicable range is wide.

[0004] However, this device still has deficiencies: This device can realize continuous detection of the engine, but during the process of detecting the engine, after the engine starts and runs, it is prone to vibration itself, which easily causes the connection end between the engine output end and the data detection component to vibrate synchronously, thus having a certain impact on the detection data and reducing the accuracy of the detection result to a certain extent. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an engine test bench with power transmission, which solves the problems raised in the above background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an engine test bench with power transmission, comprising a base, a hollow frame is arranged on the top of the base, two transmission assemblies are arranged at the bottom edge of the inner wall of the base, and the transmission assembly is driven by an external motor, the two transmission assemblies are symmetrically distributed around the axis of the base, a chain conveyor is arranged inside the transmission assembly, the chain conveyor passes through the inside of the hollow frame, a support plate is arranged on the inner wall of the hollow frame, the top of the support plate contacts the top of the inner wall of the chain conveyor, a detection platform is arranged at the top edge of the support plate, a test assembly is arranged on the top of the detection platform, and an electric motor is fixedly installed on the top of the inner wall of the hollow frame. A movable slide rail, an electric telescopic rod is slidably installed inside the electric slide rail, a hydraulic component is fixedly installed at the bottom of the telescopic end of the electric telescopic rod, the outer walls on the left and right sides of the hydraulic component are hinged with arc-shaped clamping plates through a torsion spring, a round rod is passed through and hinged at the bottom of the arc-shaped clamping plate, a U-shaped rubber plate is passed through and fixedly installed on the front and back of the outer wall of the round rod, a limit ring is fixedly installed on the outer wall of the telescopic end of the electric telescopic rod, two arc-shaped spring pieces are hinged on the outer wall of the limit ring, and an arc pressure plate is hinged at the bottom of the arc-shaped spring piece through a torsion spring, the external motor is started, and the transmission assembly drives the chain conveyor belt through the output end of the external motor for transmission, and the chain conveyor belt drives the engine to be tested to approach the testing platform When the engine is transported to the right side of the inspection table, the chain conveyor belt stops conveying. At this time, the electric slide rail starts, and the electric slide rail drives the electric telescopic rod to slide to the right inside itself. After the electric telescopic rod is started, its telescopic end drives the hydraulic component to move downward, and the hydraulic component drives the arc clamping plate to move synchronously. The arc clamping plate causes its own hinge shaft to start rotating through the hydraulic transmission of the hydraulic component, and the arc clamping plate rotates away from the center of the hydraulic component to open or directly clamp the engine. When the arc clamping plate clamps the engine, the chain conveyor belt is supported by the support plate to prevent the top of the chain conveyor belt from collapsing due to the heavy weight of the engine. The arc clamping plate closes the engine through the hydraulic component. Tightly clamp, at this time, the telescopic end of the electric telescopic rod rises to drive the engine to rise and the electric slide rail drives the electric telescopic rod to move horizontally to the left. The telescopic end of the electric telescopic rod places the engine on the top of the test bench. The staff pushes the engine conveying end into the test assembly for speed test and displays the data on the display screen on the front of the test assembly. The arc clamp drives the round rod and the U-shaped rubber plate to move synchronously. Before the arc clamp clamps the engine, the U-shaped rubber plate first contacts the outer wall of the engine to generate resistance. At this time, the hinge shaft between the U-shaped rubber plate and the round rod begins to rotate and the U-shaped rubber plate rotates downward in an arc. After the test is completed, the electric telescopic rod is used to place the engine on the top of the left side of the chain conveyor belt through the electric slide rail for continued transportation.When the arc-shaped clamping plate tightens and clamps the engine towards the center of the hydraulic component, if a failure occurs in the hydraulic component, causing the arc-shaped clamping plate to open, it will be limited and pressed by the arc-shaped pressing plate. At the same time, when the arc-shaped pressing plate is subjected to the tension of the arc-shaped clamping plate, it causes the arc-shaped elastic piece to deform. The arc-shaped elastic piece is stably limited and kept stationary through the limiting ring. Since the elastic force of the arc-shaped elastic piece is greater than the elastic force of the torsion spring between the arc-shaped clamping plate and the hydraulic component, the deformation process of the arc-shaped elastic piece is extremely slow or difficult to deform. At this time, it is difficult for the arc-shaped clamping plate to loosen the clamping of the engine, and at the same time, the alarm component emits an alarm sound and fault information to the maintenance personnel.

[0007] According to the above technical solution, an alarm component is provided at the top of the hydraulic component. A torsion spring is provided between the inside of the arc-shaped clamping plate and the round rod. The two arc-shaped elastic pieces are symmetrically distributed with the axis of the limiting ring as the center. The inner wall of the arc-shaped pressing plate is slidably connected to the outer wall of the arc-shaped clamping plate. A heat flow device is provided on the back of the hydraulic component for the module engine to be affected by the mixed heat flow formed by the influx of external wind and the heat dissipated by itself when doing work along with the movement of the carrier.

[0008] According to the above technical solution, the heat flow device includes an L-shaped plate, a heating component, and a fixing plate. The front of the top of the L-shaped plate is fixedly installed on the back of the outer wall of the fixed end of the electric telescopic rod. The bottom of the heating component is fixedly installed on the bottom of the L-shaped plate. The back of the fixing plate is fixedly installed on the back of the inner wall of the hollow frame. The back of the heating component is slidably connected to the front of the fixing plate. When the electric telescopic rod moves left and right, it drives the L-shaped plate to move synchronously. The L-shaped plate drives the heating component to slide synchronously along the front of the fixing plate. When the heating component is started, the heating component dissipates heat within the test range of the engine. The heat dissipated by the heating component is used to simulate the environmental temperature when the engine drives the equipment or the carrier to do work in an outdoor high-temperature environment.

[0009] According to the above technical scheme, the heat flow device also includes a sliding plate, a reciprocating screw, a transmission wheel, an L-shaped fan plate, a semicircular long block and a hinged plate, the bottom of the sliding plate is fixedly installed on the top of the L-shaped plate, the front end of the reciprocating screw passes through and is rotatably installed inside the sliding plate, the back of the transmission wheel is fixedly installed on the front end of the reciprocating screw, the inside of the L-shaped fan plate passes through and is slidably installed on the outer wall of the reciprocating screw, the front of the semicircular long block is fixedly installed on the back of the L-shaped fan plate, and the hinged plate is hinged at the back edge of the hollow frame through a torsion spring on the side away from the center of the L-shaped fan plate. The L-shaped plate drives the sliding plate to move synchronously, the sliding plate drives the reciprocating screw to move synchronously, and the reciprocating screw drives the transmission wheel to slide synchronously along the top of the hollow frame The movement generates friction, and the transmission wheel starts to rotate through the friction force and drives the reciprocating screw to rotate. When the reciprocating screw rotates, the reciprocating spiral groove on its outer wall restricts the built-in block of the L-shaped fan plate. At the same time, the built-in block of the L-shaped fan plate continuously contacts the inner wall of the reciprocating spiral groove. Therefore, when the reciprocating screw rotates, the L-shaped fan plate can slide back and forth along its outer wall, and the L-shaped fan plate drives the semicircular long block to move synchronously. The arc surface of the semicircular long block hits the inclined surface of the inner wall of the hinged plate to generate a resistance force, which causes the hinge axis of the hinged plate to start rotating. At the same time, the hinged plate moves away from the back side of the L-shaped fan plate. When the L-shaped fan plate moves left and right, the hinged plate on one side rotates around its own hinge axis, and the other side moves toward the back side of the L-shaped fan plate.

[0010] According to the above technical solution, the outer wall of the transmission wheel contacts the top of the inner wall of the hollow frame, the inner wall of the L-shaped fan plate contacts the outer wall of the reciprocating spiral groove of the reciprocating screw, and the bottom of the L-shaped fan plate contacts the bottom of the inner wall of the hollow frame. The inner wall of the hinged plate is located on the arc motion trajectory of the semicircular long block, and the front side of the L-shaped fan plate is provided with an anti-falling device for preventing the chain conveyor belt from deforming under the gravity pressure of the engine.

[0011] The U-shaped plate is used to hold the handle of the wheel hub and the spring to move relative to the bottom of the wheel hub.

[0012] According to the above technical solution, the anti-detachment device further includes an L-shaped contact plate, a semi-cylinder, a hollow percussion plate, and a hollow vibration plate. One side of the front of the top of the L-shaped contact plate is fixedly installed on the back of the U-shaped plate. The bottom of the semi-cylinder is fixedly installed inside the bottom of the L-shaped flapping plate. The hollow percussion plate penetrates and is fixedly installed on the outer wall of the fixed end of the elastic telescopic rod. The top of the hollow vibration plate is fixedly installed on the outer wall of the U-shaped plate. When the L-shaped flapping plate moves back and forth, it drives the semi-cylinder to move synchronously. When the semi-cylinder moves forward, it contacts the arc surface of the L-shaped contact plate to generate an upward contact force. The L-shaped contact plate drives the U-shaped plate to move upward. The U-shaped plate drives the through rod and the friction brush wheel to move upward synchronously. The friction brush wheel contacts the bottom of the chain conveyor upward to cause it to deform. When the L-shaped flapping plate moves horizontally left and right during the forward movement, at this time, the contact of the semi-cylinder with the L-shaped contact plate is a single or multiple changing contacts. Therefore, the contact of the friction brush wheel above the L-shaped contact plate with the chain conveyor is not synchronous. At the same time, when the U-shaped plate moves upward, the hollow percussion plate moves synchronously. When the U-shaped plate returns to its original position by the elastic force of the elastic telescopic rod, it suddenly strikes the top of the hollow vibration plate to generate vibration, and through the transmission of force, the friction brush wheel vibrates synchronously.

[0013] According to the above technical solution, the arc surface of the bottom of the L-shaped contact plate is located on the movement track of the outer wall of the semi-cylinder, and the top of the hollow vibration plate is located on the movement track of the bottom of the hollow percussion plate.

[0014] The present invention provides an engine test bench with power transmission. It has the following beneficial effects:

[0015] (1) Through the cooperation of the electric slide rail, electric telescopic rod, hydraulic component, arc-shaped clamping plate, round rod, U-shaped rubber plate, limit ring, arc-shaped elastic piece, and arc-shaped pressing plate, the present invention realizes the test work for engines of different models and specifications. Different from the traditional test that requires frequent replacement of clamping devices of different models, it reduces the preparation time of the test work and the labor intensity of the staff. At the same time, the U-shaped rubber plate increases the contact area between the arc-shaped clamping plate and the engine and can closely fit the non-smooth outer wall of the engine, preventing the vibration generated after the engine starts and runs from causing the synchronous vibration of the connection end of the test component, thereby reducing the accuracy of the detection result; and effectively avoiding the phenomenon that the engine falls when the hydraulic component fails, avoiding the damage of the engine itself and the damage of the chain conveyor or other components, increasing economic losses, and at the same time facilitating the staff to timely understand the operating state of the hydraulic component to ensure the timeliness of equipment maintenance.

[0016] (2) By setting up the heat flow device, the present invention effectively simulates the real operation scenario of the engine during outdoor use through the cooperation of the electric telescopic rod, L-shaped plate, heating component, fixed plate, sliding plate, reciprocating lead screw, transmission wheel, L-shaped flapping plate, semi-cylindrical long block and hinge plate. This is convenient for testing whether the engine will experience efficiency degradation when operating and generating heat on its own and in an outdoor high-temperature environment compared to the scenario of only generating heat on its own, thus enhancing the authenticity of the test work. At the same time, when simulating the movement or turning of the engine-driven carrier such as a car, the external air flow enters the engine compartment and drives the heat to be intermittently discharged from the engine compartment. After the heat stored in the engine compartment is intermittently discharged, it is further tested whether the energy efficiency test data of the engine can be improved and stably output, further enhancing the diversity and accuracy of the test data.

[0017] (3) By setting up the anti-detachment device, the present invention cooperates with the L-shaped flapping plate, fixed seat, elastic telescopic rod, U-shaped plate, through rod, friction brush wheel, L-shaped contact plate, semi-cylinder, hollow knocking plate and hollow vibrating plate. The friction brush wheel is used to rotate and brush away the solid particles or dirt remaining in the gap of the chain conveyor belt, avoiding the increase of the gap due to the clamping of solid particles in the gap of the chain conveyor belt, which reduces the connection tightness between them. At the same time, it prevents the dirt from accelerating the oxidation rate of the chain conveyor belt. At the same time, the friction brush wheel intermittently makes single contact or multiple synchronous contacts with the chain conveyor belt, realizing multi-range and different-frequency contacts with the chain conveyor belt, reducing the risk of detachment due to loose connection between the chain conveyor belt and the transmission component. At the same time, relying on the vibration force, it is ensured that when the friction brush wheel deeply contacts the chain conveyor belt upward, there will be no jamming phenomenon, and it is prevented that the friction brush wheel gets stuck in the gap of the chain conveyor belt and causes pulling and detachment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the whole of the present invention;

[0019] Figure 2 is a schematic diagram of the bottom view of the whole of the present invention;

[0020] Figure 3 is a schematic diagram of the structure around the electric telescopic rod of the present invention;

[0021] Figure 4 is a front view schematic diagram of the structure around the electric telescopic rod of the present invention;

[0022] Figure 5 is of the present invention Figure 4 is an enlarged schematic diagram of the structure at A in the present invention;

[0023] Figure 6 is a schematic diagram of the heat flow device of the present invention;

[0024] Figure 7 is a rear view schematic diagram of the heat flow device of the present invention;

[0025] Figure 8 Schematic diagram of the anti-detachment device of the present invention;

[0026] Figure 9 Overall display schematic diagram of the anti-detachment device of the present invention.

[0027] In the figure: 1, base; 2, hollow frame; 21, transmission component; 22, chain conveyor belt; 23, support plate; 3, detection table; 31, test component; 4, heat flow device; 41, L-shaped plate; 42, heating component; 43, fixing plate; 44, sliding plate; 45, reciprocating lead screw; 46, transmission wheel; 47, L-shaped flapping plate; 48, semi-cylindrical long block; 49, hinge plate; 5, anti-detachment device; 51, fixed seat; 52, elastic telescopic rod; 53, U-shaped plate; 54, through rod; 55, friction brush wheel; 56, L-shaped contact plate; 57, semi-cylinder; 58, hollow percussion plate; 59, hollow vibration plate; 6, electric slide rail; 7, electric telescopic rod; 8, hydraulic component; 9, arc-shaped clamping plate; 10, round rod; 11, U-shaped rubber plate; 12, limit ring; 13, arc-shaped elastic piece; 14, arc-shaped pressing plate. Specific implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0029] Please refer to Figures 1-9, an embodiment of the present invention is: an engine test bench with power transmission, including a base 1. A hollow frame 2 is arranged on the top of the base 1. At the bottom edge of the inner wall of the base 1, two transmission components 21 are arranged, and the transmission components 21 are driven by a peripheral motor. The two transmission components 21 are symmetrically distributed with respect to the axis of the base 1. A chain conveyor belt 22 is arranged inside the transmission component 21. The chain conveyor belt 22 passes through the inside of the hollow frame 2. A support plate 23 is arranged on the inner wall of the hollow frame 2. The top of the support plate 23 is in contact with the top of the inner wall of the chain conveyor belt 22. A test bench 3 is arranged at the top edge of the support plate 23. A test component 31 is arranged on the top of the test bench 3. An electric slide rail 6 is fixedly installed on the top of the inner wall of the hollow frame 2. An electric telescopic rod 7 is slidably installed inside the electric slide rail 6. The bottom of the telescopic end of the electric telescopic rod 7 is fixedly installed with a hydraulic component 8. Arc-shaped clamping plates 9 are hinged on the outer walls on the left and right sides of the hydraulic component 8 through torsion springs. A round rod 10 penetrates and is hinged below the inside of the arc-shaped clamping plate 9. U-shaped rubber plates 11 are fixedly installed through the front and back of the outer wall of the round rod 10. A limiting ring 12 is fixedly installed on the outer wall of the telescopic end of the electric telescopic rod 7. Two arc-shaped elastic pieces 13 are hinged on the outer wall of the limiting ring 12. The bottom of the arc-shaped elastic piece 13 is hinged with an arc-shaped pressing plate 14 through a torsion spring. Through the above cooperation, the test work for engines of different models and specifications is realized. Different from the traditional test that requires frequent replacement of clamping devices of different models, the preparation time of the test work and the labor intensity of the staff are reduced. At the same time, while the U-shaped rubber plate 11 increases the contact area between the arc-shaped clamping plate 9 and the engine, it can closely fit the non-smooth outer wall of the engine, preventing the connection end of the test component 31 from vibrating synchronously due to the vibration generated after the engine starts and runs, thereby reducing the accuracy of the detection result; through the above cooperation, it effectively avoids the phenomenon that the engine falls when the hydraulic component 8 fails, avoids the damage of the engine itself when it falls, and at the same time causes damage to the chain conveyor belt 22 or other components, increasing economic losses. At the same time, it is convenient for the staff to timely understand the operating state of the hydraulic component 8 to ensure the timeliness of equipment maintenance.

[0030] An alarm component is arranged on the top of the hydraulic component 8. A torsion spring is arranged between the inside of the arc-shaped clamping plate 9 and the round rod 10. The two arc-shaped elastic pieces 13 are symmetrically distributed with respect to the axis of the limiting ring 12. The inner wall of the arc-shaped pressing plate 14 is slidably connected with the outer wall of the arc-shaped clamping plate 9. A heat flow device 4 for the heat flow formed by the mixture of the external wind influx and the heat dissipated by the module engine when it does work along with the carrier is arranged on the back of the hydraulic component 8.

[0031] When in use, the external motor is started, and the transmission component 21 drives the chain conveyor 22 through the output end of the external motor to transmit, and the chain conveyor 22 drives the engine to be tested to move toward the direction close to the testing platform 3. When the engine is transported to the right side of the testing platform 3, the chain conveyor 22 stops conveying, and the electric slide rail 6 is started at this time, and the electric slide rail 6 drives the electric telescopic rod 7 to slide rightward inside itself. After the electric telescopic rod 7 is started, its telescopic end drives the hydraulic component 8 to move downward, and the hydraulic component 8 drives the arc clamping plate 9 to move synchronously. The arc clamping plate 9 is moved by the hydraulic component The hydraulic transmission of the component 8 causes its own hinge shaft to start rotating and the arc clamping plate 9 rotates away from the center of the hydraulic component 8 to open or directly clamp the engine. When the arc clamping plate 9 clamps the engine, the chain conveyor belt 22 is supported by the support plate 23 to prevent the top of the chain conveyor belt 22 from collapsing due to the heavy weight of the engine. The arc clamping plate 9 tightens and clamps the engine through the hydraulic component 8. At this time, the telescopic end of the electric telescopic rod 7 rises to drive the engine to rise, and the electric slide rail 6 drives the electric telescopic rod 7 to move to the left, and the electric telescopic rod 7 extends. The engine is placed on the top of the test bench 3 at the retracted end, and the staff pushes the engine conveying end into the test assembly 31 for speed test and displays data through the display screen on the front of the test assembly 31. Before the arc splint 9 clamps the engine, the U-shaped rubber plate 11 first contacts the outer wall of the engine to generate a resistance force. At this time, the hinge shaft between the U-shaped rubber plate 11 and the round rod 10 begins to rotate and the U-shaped rubber plate 11 rotates downward in an arc. Through the above cooperation, testing work for engines of different models and specifications can be achieved, which is different from the traditional test that requires frequent replacement of different models of clamping equipment, reducing the preparation time for the test work and the labor intensity of the staff. At the same time, the U-shaped rubber plate 11 increases the contact area between the arc splint 9 and the engine while being able to fit closely to the non-smooth outer wall of the engine, preventing the vibration generated after the engine starts running from causing the synchronous vibration of the connection end of the test assembly 31, thereby reducing the accuracy of the test result; after the test is completed, the electric telescopic rod 7 is used to place the engine on the top of the left side of the chain conveyor belt 22 through the electric slide rail 6 for continued transportation;When the arc-shaped splint 9 tightens and clamps the engine towards the center of the hydraulic component 8 and a failure occurs in the hydraulic component 8, when the arc-shaped splint 9 opens, it is limited and pressed by the arc-shaped pressing plate 14. At the same time, when the arc-shaped pressing plate 14 is subjected to the tension of the arc-shaped splint 9, it causes the arc-shaped elastic piece 13 to deform. The arc-shaped elastic piece 13 is stably limited and kept stationary through the limiting ring 12. Since the elastic force of the arc-shaped elastic piece 13 is greater than the elastic force of the torsion spring between the arc-shaped splint 9 and the hydraulic component 8, the deformation process of the arc-shaped elastic piece 13 is extremely slow or difficult to deform. At this time, it is difficult for the arc-shaped splint 9 to loosen the clamping of the engine. At the same time, the alarm component emits an alarm sound and fault information to the maintenance personnel. Through the above cooperation, it effectively avoids the phenomenon of the engine falling when the hydraulic component 8 fails, avoids the damage of the engine itself when it falls, and at the same time causes damage to the chain conveyor belt 22 or other components, increasing economic losses. At the same time, it is convenient for the staff to timely understand the operating status of the hydraulic component 8 and ensure the timeliness of equipment maintenance.;

[0032] Please refer to Figures 1-9 , on the basis of the above embodiments, in another embodiment of the present invention, a heat flow device 4 is further included;

[0033] The heat flow device 4 includes an L-shaped plate 41, a heating component 42, and a fixing plate 43. The front of the top of the L-shaped plate 41 is fixedly installed on the back of the outer wall of the fixed end of the electric telescopic rod 7. The bottom of the heating component 42 is fixedly installed on the bottom of the L-shaped plate 41. The back of the fixing plate 43 is fixedly installed on the back of the inner wall of the hollow frame 2. The back of the heating component 42 is slidably connected to the front of the fixing plate 43. Through the above cooperation, it simulates the real operation scenario of the engine during outdoor use, which is convenient for testing whether the engine will have a degradation phenomenon under its own operation and heat generation and in an outdoor high-temperature environment compared with the scenario of only its own heat generation, and improves the authenticity of the test work.

[0034] The heat flow device 4 further includes a sliding plate 44, a reciprocating lead screw 45, a transmission wheel 46, an L-shaped flapping plate 47, a semi-circular long block 48, and a hinged plate 49. The bottom of the sliding plate 44 is fixedly installed on the top of the L-shaped plate 41. The front end of the reciprocating lead screw 45 penetrates and is rotatably installed inside the sliding plate 44. The back of the transmission wheel 46 is fixedly installed on the front end of the reciprocating lead screw 45. The L-shaped flapping plate 47 penetrates and is slidably installed on the outer wall of the reciprocating lead screw 45. The front of the semi-circular long block 48 is fixedly installed on the back of the L-shaped flapping plate 47. One side of the hinged plate 49 away from the center of the L-shaped flapping plate 47 is hinged to the back edge of the hollow frame 2 through a torsion spring. Through the above cooperation, it simulates whether the energy efficiency test data of the engine can be improved and stably output after the external air flow enters the engine compartment and drives the heat to be indirectly discharged from the engine compartment when the engine drives a carrier such as a car to move or turn, and further improves the diversity and accuracy of the test data.

[0035] The outer wall of the driving wheel 46 contacts the top inner wall of the hollow frame 2. The inner wall of the L-shaped flapping plate 47 contacts the outer wall of the reciprocating spiral groove of the reciprocating lead screw 45, and the bottom of the L-shaped flapping plate 47 contacts the bottom inner wall of the hollow frame 2. The inner wall of the hinge plate 49 is located on the arc movement track of the semi-circular long block 48. An anti-dropping device 5 for preventing the chain conveyor belt 22 from deforming under the gravity of the engine is arranged on the front surface of the L-shaped flapping plate 47.

[0036] During use, when the electric telescopic rod 7 moves left and right, it drives the L-shaped plate 41 to move synchronously. The L-shaped plate 41 drives the heating component 42 to slide synchronously along the front surface of the fixed plate 43. The heating component 42 is started, and the heating component 42 emits heat within the test range of the engine. The heat emitted by the heating component 42 is used to simulate the ambient temperature when the engine drives equipment or a carrier to do work in an outdoor high-temperature environment. Through the above cooperation, the real operation scenario of the engine during outdoor use is simulated, which is convenient for testing whether the engine will have a degradation phenomenon when operating and generating heat by itself and in an outdoor high-temperature environment compared with the scenario of only generating heat by itself, thus improving the authenticity of the test work; the L-shaped plate 41 drives the sliding plate 44 to move synchronously, the sliding plate 44 drives the reciprocating lead screw 45 to move synchronously, the reciprocating lead screw 45 drives the driving wheel 46 to slide synchronously along the top of the hollow frame 2 to generate friction, and the driving wheel 46 starts to rotate due to the friction and drives the reciprocating lead screw 45 to rotate. When the reciprocating lead screw 45 rotates, the built-in block of the L-shaped flapping plate 47 is restricted by the reciprocating spiral groove on its outer wall. At the same time, the built-in block of the L-shaped flapping plate 47 continuously contacts the inner wall of the reciprocating spiral groove. Therefore, when the reciprocating lead screw 45 rotates, the L-shaped flapping plate 47 can reciprocate back and forth along its outer wall. The L-shaped flapping plate 47 drives the semi-circular long block 48 to move synchronously. The arc surface of the semi-circular long block 48 abuts against the inclined surface of the inner wall of the hinge plate 49 to generate a reaction force, which causes the hinge shaft of the hinge plate 49 to start rotating. At the same time, the hinge plate 49 moves away from the back surface of the L-shaped flapping plate 47. When the L-shaped flapping plate 47 moves left and right, the hinge plate 49 on one side in contact rotates around its own hinge shaft, and the other side moves towards the back surface of the L-shaped flapping plate 47. Through the above cooperation, it is simulated that after the external air flow enters the engine compartment and drives the heat to be indirectly discharged from the engine compartment when the engine drives a carrier such as a car to move or turn, whether the energy efficiency test data of the engine can be improved and stably output after the heat stored in the engine compartment is indirectly discharged, further improving the diversity and accuracy of the test data.

[0037] Please refer to Figures 1-9 , on the basis of the above embodiments, another embodiment of the present invention further includes an anti-dropping device 5;

[0038] The anti - shedding device 5 includes a fixed seat 51, an elastic telescopic rod 52, a U - shaped plate 53, a through rod 54 and a friction brush wheel 55. The bottom of the fixed seat 51 is fixedly installed at the center of the inner bottom wall of the hollow frame 2. The bottom of the fixed end of the elastic telescopic rod 52 is fixedly installed at the top of the fixed seat 51. The bottom of the U - shaped plate 53 is fixedly installed at the top of the telescopic end of the elastic telescopic rod 52. Both outer walls of the two ends of the through rod 54 are fixedly installed on the inner wall of the U - shaped plate 53. The friction brush wheel 55 is rotatably installed on the outer wall of the through rod 54. The outer wall of the friction brush wheel 55 is in contact with the bottom of the chain conveyor belt 22. Through the above cooperation, the residual solid particles or dirt in the gap of the chain conveyor belt 22 are removed by the rotating brushing of the friction brush wheel 55, avoiding the increase of the gap due to the clamping of solid particles in the gap of the chain conveyor belt 22, which reduces the connection tightness between them. At the same time, it prevents the dirt from accelerating the oxidation rate of the chain conveyor belt 22.

[0039] The anti - shedding device 5 further includes an L - shaped contact plate 56, a semi - cylinder 57, a hollow knocking plate 58 and a hollow vibrating plate 59. One side of the top of the L - shaped contact plate 56 is fixedly installed on the back of the U - shaped plate 53. The bottom of the semi - cylinder 57 is fixedly installed at the inner bottom of the L - shaped flapping plate 47. The hollow knocking plate 58 penetrates and is fixedly installed on the outer wall of the fixed end of the elastic telescopic rod 52. The top of the hollow vibrating plate 59 is fixedly installed on the outer wall of the U - shaped plate 53. Through the above cooperation, the friction brush wheel 55 intermittently makes single contact or multiple synchronous contacts with the chain conveyor belt 22, realizing multi - range and different - frequency contacts with the chain conveyor belt 22, reducing the risk of shedding due to loose connection between the chain conveyor belt 22 and the transmission component 21. At the same time, relying on the vibration force, it avoids the phenomenon of jamming when the friction brush wheel 55 deeply contacts the chain conveyor belt 22 upward, and prevents the friction brush wheel 55 from being caught in the gap of the chain conveyor belt 22 and causing a pulling - off phenomenon.

[0040] The arc surface at the bottom of the L - shaped contact plate 56 is located on the movement track of the outer wall of the semi - cylinder 57, and the top of the hollow vibrating plate 59 is located on the movement track of the bottom of the hollow knocking plate 58.

[0041] When in use, the fixing seat 51 limits the elastic telescopic rod 52, and the elastic telescopic rod 52 limits the U-shaped plate 53. The U-shaped plate 53 forces the through rod 54 to remain stationary. The through rod 54 drives the friction brush wheel 55. When the elastic telescopic rod 52 is stationary and in the initial state, its outer wall can contact the bottom of the outer wall of the chain conveyor belt 22 and generate friction. The friction brush wheel 55 starts to rotate due to the friction force. Therefore, during the transmission process of the chain conveyor belt 22, the friction brush wheel 55 continuously contacts the adjacent gaps and crevices of the chain conveyor belt 22. The solid particles or dirt remaining in the gap of the chain conveyor belt 22 are removed by rotating the brush, so as to avoid the gap of the chain conveyor belt 22 being enlarged due to the jamming of solid particles, thereby reducing the tightness of the connection between them, and at the same time preventing the dirt from accelerating the oxidation rate of the chain conveyor belt 22; when the L-shaped fan plate 47 moves forward and backward, it drives the semi-cylinder 57 to move synchronously, and when the semi-cylinder 57 moves forward, it contacts the arc surface of the L-shaped contact plate 56 to generate an upward contact force, and the L-shaped contact plate 56 drives the U-shaped plate 53 to move upward, and the U-shaped plate 53 drives the through rod 54 and the friction brush wheel 55 to move upward synchronously. The friction brush wheel 55 contacts the bottom of the chain conveyor belt 22 upward to cause it to deform. When the L-shaped fan plate 47 moves forward, it moves horizontally to the left and right. At this time, the contact between the semi-cylinder 57 and the L-shaped contact plate 56 is a continuously changing single or multiple contact. Therefore, the friction brush wheel 55 above the L-shaped contact plate 56 also contacts the chain conveyor belt 22 asynchronously. At the same time, when the U-shaped plate 53 moves upward, the hollow knocking plate 58 moves synchronously. When the U-shaped plate 53 is reset by the elastic force of the elastic telescopic rod 52, it suddenly knocks on the top of the hollow vibration plate 59 Vibration is generated, and the friction brush wheel 55 is caused to vibrate synchronously through the transmission of force. Through the above cooperation, the friction brush wheel 55 is relied upon to perform intermittent single or multiple synchronous resistances on the chain conveyor belt 22, so as to achieve resistance of the chain conveyor belt 22 in multiple ranges and at different frequencies, thereby reducing the risk of the chain conveyor belt 22 and the transmission component 21 falling off due to loose connection. At the same time, the vibration force is relied upon to avoid the friction brush wheel 55 from deeply resisting the chain conveyor belt 22 upward to prevent the friction brush wheel 55 from getting stuck in the gap inside the chain conveyor belt 22 and being pulled off.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An engine test bench with power transmission, comprising a base (1), a hollow frame (2) being arranged on the top of the base (1), two transmission assemblies (21) being arranged at the bottom edge of the inner wall of the base (1), and the transmission assemblies (21) being driven by an external motor, the two transmission assemblies (21) being symmetrically distributed around the axis of the base (1), a chain conveyor belt (22) being arranged inside the transmission assembly (21), the chain conveyor belt (22) passing through the inside of the hollow frame (2), a support plate (23) being arranged on the inner wall of the hollow frame (2), the top of the support plate (23) being in contact with the top of the inner wall of the chain conveyor belt (22), a test bench (3) being arranged at the top edge of the support plate (23), and a test assembly (31) being arranged on the top of the test bench (3), characterized in that: An electric slide rail (6) is fixedly mounted on the top of the inner wall of the hollow frame (2), an electric telescopic rod (7) is slidably mounted inside the electric slide rail (6), a hydraulic assembly (8) is fixedly mounted on the bottom of the telescopic end of the electric telescopic rod (7), the outer walls on both sides of the left and right sides of the hydraulic assembly (8) are hingedly connected with arc-shaped clamping plates (9) through torsion springs, a round rod (10) is passed through and hingedly connected to the inner bottom of the arc-shaped clamping plate (9), a U-shaped rubber plate (11) is passed through and fixedly mounted on the front and back sides of the outer wall of the round rod (10), a limiting ring (12) is fixedly mounted on the outer wall of the telescopic end of the electric telescopic rod (7), two arc-shaped spring sheets (13) are hingedly connected to the outer wall of the limiting ring (12), and an arc-shaped pressure plate (14) is hingedly connected to the bottom of the arc-shaped spring sheet (13) through a torsion spring, and a heat flow device (4) is arranged on the back of the hydraulic assembly (8) for mixing the heat generated by the external wind force influx and the heat emitted by the module engine itself when the carrier moves to perform work; The heat flow device (4) comprises an L-shaped plate (41), a heating component (42) and a fixing plate (43); the front of the top of the L-shaped plate (41) is fixedly mounted on the back of the outer wall of the fixed end of the electric telescopic rod (7); the bottom of the heating component (42) is fixedly mounted on the bottom of the L-shaped plate (41); the back of the fixing plate (43) is fixedly mounted on the back of the inner wall of the hollow frame (2); and the back of the heating component (42) is slidably connected to the front of the fixing plate (43).

2. An engine test bench with power transmission according to claim 1, characterized in that: An alarm assembly is arranged on the top of the hydraulic assembly (8), a torsion spring is arranged between the inside of the arc-shaped clamping plate (9) and the round rod (10), the two arc-shaped spring pieces (13) are symmetrically distributed about the axis of the limiting ring (12), and the inner wall of the arc-shaped pressure plate (14) is slidably connected to the outer wall of the arc-shaped clamping plate (9).

3. An engine test bench with power transmission according to claim 2, characterized in that: The heat flow device (4) further comprises a sliding plate (44), a reciprocating screw rod (45), a transmission wheel (46), an L-shaped fan plate (47), a semicircular long block (48) and a hinged plate (49), wherein the bottom of the sliding plate (44) is fixedly mounted on the top of the L-shaped plate (41), the front end of the reciprocating screw rod (45) passes through and is rotatably mounted inside the sliding plate (44), the back of the transmission wheel (46) is fixedly mounted on the front end of the reciprocating screw rod (45), the inside of the L-shaped fan plate (47) passes through and is slidably mounted on the outer wall of the reciprocating screw rod (45), the front of the semicircular long block (48) is fixedly mounted on the back of the L-shaped fan plate (47), and the hinged plate (49) is hinged to the back edge of the hollow frame (2) via a torsion spring on the side away from the center of the L-shaped fan plate (47).

4. An engine test bench with power transmission according to claim 3, characterized in that: The outer wall of the transmission wheel (46) contacts the top of the inner wall of the hollow frame (2), the inner wall of the L-shaped fan plate (47) contacts the outer wall of the reciprocating spiral groove of the reciprocating screw rod (45), and the bottom of the L-shaped fan plate (47) contacts the bottom of the inner wall of the hollow frame (2), the inner wall of the hinged plate (49) is located on the arc surface motion trajectory of the semicircular long block (48), and the front of the L-shaped fan plate (47) is provided with an anti-drop device (5) for preventing the chain conveyor belt (22) from deforming under the pressure of engine gravity.

5. The engine test bench with power transmission according to claim 4, characterized in that: The anti-falling device (5) comprises a fixed seat (51), an elastic telescopic rod (52), a U-shaped plate (53), a through rod (54) and a friction brush wheel (55); the bottom of the fixed seat (51) is fixedly mounted at the center of the bottom of the inner wall of the hollow frame (2); the bottom of the fixed end of the elastic telescopic rod (52) is fixedly mounted on the top of the fixed seat (51); the bottom of the U-shaped plate (53) is fixedly mounted on the top of the telescopic end of the elastic telescopic rod (52); the outer walls of both ends of the through rod (54) are fixedly mounted on the inner wall of the U-shaped plate (53); the friction brush wheel (55) is rotatably mounted inside the through rod (54) on the outer wall; the outer wall of the friction brush wheel (55) contacts the bottom of the chain conveyor belt (22).

6. The engine test bench with power transmission according to claim 5, characterized in that: The anti-falling device (5) further comprises an L-shaped abutment plate (56), a semi-cylinder (57), a hollow knocking plate (58) and a hollow vibration plate (59); the front side of the top of the L-shaped abutment plate (56) is fixedly mounted on the back of the U-shaped plate (53); the bottom of the semi-cylinder (57) is fixedly mounted on the bottom of the inside of the L-shaped fan plate (47); the inside of the hollow knocking plate (58) passes through and is fixedly mounted on the outer wall of the fixed end of the elastic telescopic rod (52); and the top of the hollow vibration plate (59) is fixedly mounted on the outer wall of the U-shaped plate (53).

7. An engine test bench with power transmission according to claim 6, characterized in that: The arc surface at the bottom of the L-shaped abutment plate (56) is located on the movement trajectory of the outer wall of the semi-cylinder (57), and the top of the hollow vibration plate (59) is located on the movement trajectory of the bottom of the hollow striking plate (58).

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