Diesel generator test bench

Abstract

The invention relates to the technical field of generator test equipment, and particularly discloses a diesel generator test bench, which comprises a machine body, two bearing arms and a lifting assembly, two guide rods, a main shaft and a driving system are arranged in the machine body, two threaded sections with opposite rotation directions are arranged on the main shaft, and threaded sleeves are arranged on the threaded sections. An inner push plate and an outer push plate which are in sliding fit with the guide rods are fixed to each threaded sleeve. Driving parts are arranged at the rear ends of the bearing arms, are in sliding connection with the two guide rods, and are respectively positioned between the inner push plates and the outer push plates of the two screw sleeves; the hoisting assembly comprises a rope, a hook and a winding wheel, the winding wheel is fixedly connected with the spindle, one end of the rope is connected with the hook, and the other end of the rope is connected with the winding wheel. The test bed can autonomously complete loading and unloading of the diesel generator, and is flexible and convenient; power is provided for position adjustment of the bearing arm and lifting work of the diesel generator through one main shaft and one driving system, the overall structure is simple, and the implementation cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of generator test equipment, and particularly relates to a diesel generator test bench. BACKGROUND

[0002] In the production and manufacturing process of the diesel generator, in order to ensure the product quality and working performance, the diesel generator needs to be tested and tested in terms of electrical performance, load characteristics, safety and fuel consumption rate and other projects. At present, the test equipment for the diesel generator mostly adopts fixed design, needs to use additional auxiliary equipment such as forklift and crane to complete the loading and unloading operation, the test efficiency is low, and the space condition is high. The application patent with the publication number CN120761040A discloses a generator comprehensive test platform, which is the self-research technology of the applicant. In the technical scheme, through the cooperation of the supporting assembly and the hoisting assembly, the loading and unloading of the diesel generator can be independently completed, and the foregoing technical problems existing in the prior art are better solved. However, as the primary technology, there are still some deficiencies in the actual application, which need to be improved. Specifically, the supporting assembly and the hoisting assembly are motorized components, and a driving system needs to be set for each component to drive and control, so that the manufacturing cost and working energy consumption of the equipment are high, and the structure of the equipment is complicated and heavy, and the flexibility needs to be improved. SUMMARY

[0003] In order to overcome the deficiencies of the prior art, the present application provides a diesel generator test bench. By reasonably arranging the bearing arm and the lifting assembly on the machine body, the loading and unloading of the diesel generator can be independently completed. At the same time, by optimizing the transmission structure, the bearing arm and the lifting assembly are driven and controlled by the same driving system, so as to simplify the overall structure of the test bench, reduce the manufacturing cost and operating energy consumption of the test bench.

[0004] In order to achieve the above technical purpose, the present application adopts the following technical scheme: A diesel generator test bench, comprising a machine body, two bearing arms, a lifting assembly and a test equipment, the machine body is provided with a supporting wheel; the two bearing arms are distributed side by side on the front side of the machine body, and universal wheels are installed on the lower side of the bearing arms; the lifting assembly comprises a lifting frame, a rope and a lifting hook, the lifting frame is fixed on the machine body and is provided with a guide wheel set, one end of the rope extends above the two bearing arms and is connected with the lifting hook; The machine body is equipped with two guide rods, a main shaft, and a drive system. The two guide rods and the main shaft are parallel to each other and extend horizontally within the machine body. The drive system is used to drive the main shaft to rotate and can switch the rotation direction of the main shaft. The main shaft is provided with two threaded sections with opposite directions of rotation. Each threaded section is fitted with a threaded sleeve. Each sleeve is fixed with two push plates that are spaced apart along the axial direction. The two push plates that are close to each other on the two sleeves are inner push plates, and the two push plates that are far apart are outer push plates. Both the inner and outer push plates are in sliding engagement with the two guide rods. The rear end of the bearing arm is fixedly connected to a drive unit, which is slidably connected to two guide rods. The two drive units are respectively located between the inner push plate and the outer push plate of the two threaded sleeves. The axial dimension of the drive unit is smaller than the distance between the inner push plate and the outer push plate on both sides of it, so that the threaded sleeve and the corresponding drive unit can move relative to each other axially within a predetermined range. The hoisting assembly includes a winch that is fixedly connected to the main shaft. The end of the rope away from the hook extends into the machine body and is fixedly connected to the winch. When the rope is fully unwound from the winch, the sleeve is located in the middle of the stroke.

[0005] Preferably, a drive wheel is fixed on the main shaft, and the drive wheel is located between two threaded sections; the drive system includes a motor device and an output wheel that are connected by transmission, and the output wheel and the drive wheel are connected by transmission via a flexible element, which is a synchronous belt or a transmission chain.

[0006] Preferably, the winch is located at the exact center of the main shaft.

[0007] Preferably, the winch is located at the center of the main shaft, and a drive wheel is fixed on the main shaft. The drive wheel is located on one side of the winch and the two are fixedly connected. The drive wheel is connected to the drive system for transmission.

[0008] Preferably, at least two support wheels are provided, symmetrically distributed on both sides of the transverse direction of the body; the body is provided with a power system and a steering system that cooperate with the support wheels, as well as a control system for regulating the drive system and the steering system.

[0009] Preferably, the machine body includes a housing and a cover. The housing is box-shaped. The main shaft, two guide rods, and drive system are installed inside the housing. The cover is fixed on the upper side of the housing and seals the upper port of the housing. The lifting assembly and testing equipment are installed on the upper side of the cover. The cover has rope holes for ropes to pass through.

[0010] Preferably, a weighing sensor is installed on the support arm, and a support plate for supporting the diesel generator is provided on the upper side of the weighing sensor.

[0011] Preferably, the main shaft is located behind the two guide rods, which are distributed vertically at intervals, and the drive unit is column-shaped.

[0012] Preferably, the rear end of the two bearing arms is respectively fixed with a toggle arm on the opposite side, and the driving part is fixedly connected with the toggle arm, so that the distance between the two driving parts is less than the distance between the two bearing arms.

[0013] Preferably, the upper end of the hook is rotatably connected with a pulley, and the rope is drawn out from the hanger downward, passes through the pulley and extends upward, and is finally locked and fixed by a locking piece, which is fixed on the hanger.

[0014] Preferably, the lower side of each bearing arm is provided with at least two universal wheels.

[0015] Compared with the prior art, the diesel generator test bench in the application has the following beneficial technical effects: 1. The test bench adopts a movable design, is convenient to adjust the position, can independently complete the loading and unloading of the diesel generator, does not need other equipment assistance, significantly reduces the requirement for site space conditions, and is flexible and convenient; in particular, the loading and unloading can be completed on the spot at the placement position of the diesel generator, significantly saving the operation space.

[0016] 2. The test bench is based on a delicate structure design, so that the position adjustment of the bearing arm and the lifting work of the diesel generator are driven and controlled by a set of driving system, without the need to separately set power devices and corresponding control elements, greatly simplifying the overall structure of the test bench, significantly reducing the manufacturing cost and work energy consumption, and further improving the flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the application, and are not a limitation on the application.

[0018] Figure 1 It is an overall structure schematic diagram of the test bench in the embodiment.

[0019] Figure 2 It is a state schematic diagram of the test bench in the embodiment when lifting the diesel generator.

[0020] Figure 3 It is a state schematic diagram of the test bench in the embodiment when testing the diesel generator.

[0021] Figure 4 It is a structure schematic diagram of the inside of the body in the embodiment.

[0022] Figure 5 It is a structure schematic diagram of the two bearing arms in the embodiment.

[0023] Figure 6 Fig. 2 is a schematic view of the cooperation structure between the two bearing arms and the machine body in the embodiment.

[0024] Figure 7 Fig. 3 is a schematic view of the cooperation structure between the lifting assembly and the machine body in the embodiment.

[0025] Figure 8 Fig. 4 is a schematic view of the state when the diesel generator is lifted from the ground during loading.

[0026] Figure 9 Fig. 5 is a schematic view of the transmission state when the diesel generator is lifted from the ground during loading.

[0027] Figure 10 Fig. 6 is a schematic view of the transmission state when the two bearing arms are close during loading.

[0028] Figure 11 Fig. 7 is a schematic view of the lowering state of the diesel generator during loading.

[0029] Figure 12 Fig. 8 is a schematic view of the transmission state when the diesel generator is lowered during loading.

[0030] Figure 13 Fig. 9 is a schematic view of the state when the diesel generator is lifted from the two bearing arms during unloading.

[0031] Figure 14 Fig. 10 is a schematic view of the transmission state when the diesel generator is lifted from the two bearing arms during unloading.

[0032] Figure 15 Fig. 11 is a schematic view of the transmission state when the two bearing arms are away during unloading.

[0033] Figure 16 Fig. 12 is a schematic view of the lowering state of the diesel generator during unloading.

[0034] Figure 17 Fig. 13 is a schematic view of the transmission state when the diesel generator is lowered during unloading.

[0035] In the figure: 1, machine body, 101, machine cover, 102, machine shell, 2, test equipment, 3, guide wheel set, 4, lifting frame, 5, locking piece, 6, rope, 7, pulley, 8, lifting hook, 9, universal wheel, 10, bearing arm, 11, supporting wheel, 12, diesel generator, 13, supporting plate, 14, motor device, 15, synchronous belt, 16, output wheel, 17, driving wheel, 18, guide rod, 19, outer push plate, 20, inner push plate, 21, winding wheel, 22, threaded sleeve, 23, main shaft, 24, weighing sensor, 25, crank arm, 26, driving part, 27, sliding hole, 28, rope hole. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort belong to the scope of protection of the present application.

[0037] Referring to Figures 1-3 As shown in the figure, the embodiment discloses the specific structure of the diesel generator test bench in the present application, which mainly consists of a machine body 1, two bearing arms 10, a lifting assembly and a test equipment 2.

[0038] Referring to Figures 1-4 As shown in the figure, a plurality of support wheels 11 are installed on the lower side of the machine body 1, and two guide rods 18, a main shaft 23 and a driving system are installed inside the machine body 1; the two guide rods 18 and the main shaft 23 are parallel to each other and extend horizontally in the machine body 1; the two ends of the guide rod 18 are fixedly connected with the machine body 1, and the two ends of the main shaft 23 are rotatably connected with the machine body 1 through a shaft seat, the driving wheel 17 is fixed on the main shaft 23 and the center axes of the two coincide; the driving system is in transmission connection with the driving wheel 17, used for driving the main shaft 23 to rotate and capable of switching the rotation direction of the main shaft 23; two threaded sections are arranged on the main shaft 23, the rotation directions of the two threaded sections are opposite, and the two threaded sections are located on the two sides of the driving wheel 17 respectively; a threaded sleeve 22 is sleeved on each threaded section, and two push plates are fixed on each threaded sleeve 22 in the same way; specifically, the two push plates fixed on the same threaded sleeve 22 are distributed in an axial direction, the two push plates close to each other on the two threaded sleeves 22 are inner push plates 20, and the two push plates far away from each other are outer push plates 19; the inner push plates 20 and the outer push plates 19 are in sliding fit with the two guide rods 18, so as to be capable of moving horizontally in the machine body 1 along the guide rods 18; thus, when the main shaft 23 rotates, the two threaded sleeves 22 move synchronously and reversely along the main shaft 23, i.e. approach or move away at the same speed, and the inner push plates 20 and the outer push plates 19 fixed on the same threaded sleeve 22 move synchronously with the threaded sleeve 22.

[0039] Referring to Figures 1-6As shown, the bearing arms 10 extend in the front-rear direction, and two bearing arms 10 are distributed side by side on the front side of the machine body 1; the lower side of the bearing arm 10 is provided with a universal wheel 9, and the rear end is fixedly connected with a driving part 26; the driving part 26 is provided with a sliding hole 27 through which the two guide rods 18 pass, so that the driving part 26 is in sliding fit with the two guide rods 18, thereby being able to move laterally in the machine body 1 along the two guide rods 18; the two driving parts 26 are respectively located between the inner push plate 20 and the outer push plate 19 of the two screw sleeves 22, the axial dimension of the driving part 26 is smaller than the distance between the inner push plate 20 and the outer push plate 19 located on both sides of the driving part 26, so that the screw sleeve 22 and the corresponding driving part 26 can move relatively in the axial direction within a predetermined range; thus, when the two screw sleeves 22 are away, the screw sleeve 22 can drive the corresponding bearing arm 10 to move only after the inner push plate 20 contacts the corresponding driving part 26, so that the two bearing arms 10 are away; similarly, when the two screw sleeves 22 are close, the screw sleeve 22 can drive the corresponding bearing arm 10 to move only after the outer push plate 19 contacts the corresponding driving part 26, so that the two bearing arms 10 are close.

[0040] Referring to Figures 1-3 、 Figure 7 As shown, the lifting assembly is composed of a lifting frame 4, a winch 21, a rope 6 and a lifting hook 8; the lower end of the lifting frame 4 is fixedly installed on the machine body 1, and the upper end extends to the front upper side of the machine body 1, and the lifting frame 4 is provided with a guide wheel set 3 for guiding the rope 6; the winch 21 is fixedly connected with the main shaft 23 and the center axes of the two coincide; under the guidance of the guide wheel set 3, one end of the rope 6 extends to the upper side of the two bearing arms 10 and is connected with the lifting hook 8, and the other end of the rope 6 extends to the inside of the machine body 1 and is fixedly connected with the winch 21; the winch 21 can wind and unwind the rope 6 by rotating to adjust the height of the lifting hook 8; when the rope 6 is completely unwound from the winch 21, i.e. the rope 6 is not wound on the winch 21, the screw sleeve 22 is located at the middle of the stroke, not at the stroke end.

[0041] As Figure 1 、 Figure 2 As shown, the test equipment 2 is fixedly installed on the machine body 1, and according to the test requirements, the electrical performance, load characteristics and safety of the diesel generator 12 are tested.

[0042] Based on the above design, the test bench can autonomously load and unload the diesel generator 12 during the test and test process, and the specific steps and working principles are as follows: 1. Position adjustment.

[0043] The driving system drives the main shaft 23 to rotate, so that the two screw sleeves 22 move away, thereby increasing the distance between the two bearing arms 10 to accommodate the diesel generator 12; the position of the test bench is moved, so that the diesel generator 12 is located at the front side of the engine body 1 and between the two bearing arms 10; the appropriate lifting point of the diesel generator 12 is selected and connected with the hook 8, and the connection position of the hook 8 and the rope 6 is adjusted, so that the rope 6 is in a tension state.

[0044] 2. Loading of the diesel generator.

[0045] As shown in Figure 8 ,the driving system drives the main shaft 23 to rotate, so that the two screw sleeves 22 move away, thereby increasing the distance between the two bearing arms 10 to accommodate the diesel generator 12; the position of the test bench is moved, so that the diesel generator 12 is located at the front side of the engine body 1 and between the two bearing arms 10; the appropriate lifting point of the diesel generator 12 is selected and connected with the hook 8, and the connection position of the hook 8 and the rope 6 is adjusted, so that the rope 6 is in a tension state. Figure 9 ,the outer push plate 19 will be in contact with the driving part 26, and the two bearing arms 10 are driven by the two screw sleeves 22 to move towards the middle, so as to move to the lower side of the diesel generator 12; then, as shown in Figure 10 , the driving system switches the rotating direction of the main shaft 23, and the winch 21 unwinds the rope 6 until the diesel generator 12 is lowered onto the two bearing arms 10. During the lowering of the diesel generator 12, the two screw sleeves 22 move away, but since the inner push plate 20 is in a state of moving away from the driving part 26, the position of the two bearing arms 10 will not change, thereby ensuring that the diesel generator 12 is lowered onto the two bearing arms 10 to achieve the loading of the diesel generator 12. Figure 11 Figure 12 3. Unloading of the diesel generator.

[0046] As shown in , after the test is completed, the driving system drives the main shaft 23 to rotate, so that the two screw sleeves 22 move away, thereby increasing the distance between the two bearing arms 10 to accommodate the diesel generator 12; the position of the test bench is moved, so that the diesel generator 12 is located at the front side of the engine body 1 and between the two bearing arms 10; the appropriate lifting point of the diesel generator 12 is selected and connected with the hook 8, and the connection position of the hook 8 and the rope 6 is adjusted, so that the rope 6 is in a tension state.

[0047] , the outer push plate 19 will be in contact with the driving part 26, and the two bearing arms 10 are driven by the two screw sleeves 22 to move towards the middle, so as to move to the lower side of the diesel generator 12; then, as shown in Figure 13 , the driving system switches the rotating direction of the main shaft 23, and the winch 21 unwinds the rope 6 until the diesel generator 12 is lowered onto the two bearing arms 10. During the lowering of the diesel generator 12, the two screw sleeves 22 move away, but since the inner push plate 20 is in a state of moving away from the driving part 26, the position of the two bearing arms 10 will not change, thereby ensuring that the diesel generator 12 is lowered onto the two bearing arms 10 to achieve the loading of the diesel generator 12. Figure 14 Figure 15 3. Unloading of the diesel generator. Figure 16 Figure 17As shown, the driving system is used to switch the rotating direction of the main shaft 23, and the winding wheel 21 unwinds the rope 6 until the diesel generator 12 is lowered to the ground. During the lowering of the diesel generator 12, the two nuts 22 are close to each other, but the outer push plate 19 and the driving part 26 are in a state of being far away from each other, so that the position of the two bearing arms 10 does not change, thereby ensuring that the diesel generator 12 is lowered to the ground, and thus the unloading of the diesel generator 12 is completed.

[0048] During the implementation of the test bench in the present application, combined with the size of the diesel generator 12, the distance between the inner push plate 20 and the outer push plate 19, the stroke amount of the nut 22, the wheel diameter of the winding wheel 21, and the length of the rope 6 are adjusted regularly, and there is no technical obstacle to realize the above functions, thereby achieving the intended technical purpose of the present application.

[0049] Referring to Figures 8-17 As shown, the significant feature of the test bench is that the nut 22 provides driving for the bearing arm 10 through the interval arrangement of the inner push plate 20 and the outer push plate 19, so that when the nut 22 changes the moving direction, the bearing arm 10 does not directly move with the nut 22, so that the lifting assembly can pre-complete the lifting adjustment of the diesel generator 12, and realize the spatial cooperation of the diesel generator 12 and the bearing arm 10 during the loading and unloading process; the winding direction of the rope 6 by the winding wheel 21 can be automatically adjusted, thereby realizing the specific lifting requirement under the two different working conditions of the loading and unloading of the diesel generator 12. Based on the above ingenious points, the position adjustment of the bearing arm 10 and the lifting work of the diesel generator 12 are jointly provided with power by a main shaft 23 and a set of driving system, without the need to separately arrange power devices and corresponding control elements, greatly simplifying the overall structure of the test bench, significantly reducing the manufacturing cost, and being conducive to realizing the miniaturization design and improving the flexibility.

[0050] The test bench adopts a movable design, is convenient to adjust the position, is not limited to a fixed work site, can independently complete the loading and unloading of the diesel generator, does not need other equipment assistance, significantly reduces the requirement for site space conditions, is flexible and convenient, especially can complete the loading and unloading on the spot at the placement position of the diesel generator, and can significantly save the operation space; at the same time, the test bench adopts a movable design, and has a lifting function integrated therein, after the test is completed, can serve as a transfer vehicle to transfer the diesel generator for a short distance, so as to improve the overall production efficiency of the diesel generator.

[0051] When the test bench is used, the connection position of the lifting hook on the rope can be adjusted according to the size of the diesel generator, and the distance between the two bearing arms can be adjusted to meet the test requirements of diesel generators of different specifications, and the test bench has strong practicability.

[0052] AsFigure 1 , Figure 2 As shown, in the structure adopted by this test bench, the casters 9 are used to provide support for the two bearing arms 10, ensuring the overall mobility of the test bench. Based on the automatic adaptation of direction, they can reduce the moving resistance when adjusting the distance between the two bearing arms 10, thereby reducing the workload of the drive system. In the specific implementation process, at least two casters 9 are provided on the lower side of each bearing arm 10 to ensure support stability and force balance.

[0053] In the structure adopted by this test bench, the hook 8 is used to connect with the diesel generator 12. In the specific implementation process, the hook 8 should have an appropriate weight to ensure that when the hook 8 is not supporting the weight of the diesel generator 12, the hook 8 can drive the rope 6 downward by its own weight during the unwinding process of the winch 21, so as to ensure the smooth unwinding and avoid the occurrence of rope tangling.

[0054] See Figure 4 As shown, in a preferred embodiment, the drive system includes a motor device 14 and an output wheel 16 connected by a transmission. The output wheel 16 is connected to the drive wheel 17 by a flexible element, which is selected as a synchronous belt 15 or a transmission chain.

[0055] See Figure 2 , Figure 4 , Figure 8 As shown, in a preferred embodiment, the winch 21 is located at the center of the main shaft 23, so that the load generated by the lifting assembly during operation is mainly concentrated in the middle of the machine body 1, ensuring operational stability and improving force balance. Furthermore, the drive wheel 17 is located on one side of the winch 21 and the two are fixedly connected. The drive wheel 17 and the winch 21 can be an integral structure or a separate design and fixedly connected by bolts. This allows the drive wheel 17 and the winch 21 to directly transmit power, reducing the force on the main shaft 23, making the operation more stable, and also improving the structural stability and compactness of the drive wheel 17, the winch 21 and the main shaft 23.

[0056] In a preferred embodiment, at least two support wheels 11 are provided, symmetrically distributed on both sides of the transverse direction of the body 1; the body 1 is provided with a power system and a steering system that cooperate with the support wheels 11, as well as a control system for regulating the drive system and the steering system, and the support wheels 11 serve as drive wheels 17 and steering wheels; thereby, the test bench can move automatically under human control without human driving, and the position adjustment is more flexible and labor-saving.

[0057] See Figure 1 , Figure 4 , Figure 7As shown, in a preferred embodiment, the machine body 1 includes a housing 102 and a cover 101. The housing 102 is box-shaped. The main shaft 23, two guide rods 18, and the drive system are installed inside the housing 102. The cover 101 is fixedly installed on the upper side of the housing 102 to seal the upper port of the housing 102. The lifting assembly and the testing equipment 2 are fixedly installed on the upper side of the cover 101. The cover 101 has a rope hole 28 for the rope 6 to pass through. Thus, the transmission structure is located in a relatively enclosed space, avoiding direct exposure to the outside world and improving the stability of the operation and the safety of operation.

[0058] See Figure 3 , Figure 5 As shown, in a preferred embodiment, a weighing sensor 24 is installed on the support arm 10, and a support plate 13 for supporting the diesel generator 12 is provided on the upper side of the weighing sensor 24; when the diesel generator 12 is supported by the two support arms 10, the weighing sensor 24 can collect the weight data of the diesel generator 12 so as to obtain test data such as the overall weight, fuel consumption rate and running stability based on the weighing data.

[0059] See Figure 4 , Figure 6 As shown, in a preferred embodiment, the main shaft 23 is located behind the two guide rods 18, which are distributed vertically at intervals. The drive unit 26 is column-shaped to facilitate sliding engagement with the two vertically distributed guide rods 18. This ensures the stability of the engagement between the body 1 and the two support arms 10, optimizes the layout of the above components, and makes the overall structure more compact.

[0060] See Figure 5 , Figure 6 As shown, in a preferred embodiment, two crank arms 25 are fixed to opposite sides of the rear ends of the two bearing arms 10, and the driving part 26 is fixedly connected to the crank arm 25, so that the distance between the two driving parts 26 is smaller than the distance between the two bearing arms 10, thereby reducing the length requirements of the main shaft 23 and the two guide rods 18, and further reducing the lateral dimension of the body 1.

[0061] See Figure 1 , Figure 7As shown, in the preferred embodiment, the upper end of the hook 8 is rotatably connected with a pulley 7, one end of the rope 6 away from the winding wheel 21 is led out from the hanger 4 downward, extends upward after passing through the pulley 7, and is finally locked and fixed by a locking member 5 which is fixed on the hanger 4; thus, the pulley 7 and the rope 6 form a force-saving pulley 7 mechanism, which is more labor-saving for the lifting operation of the diesel generator 12 and reduces the working load of the driving system; at the same time, the setting of the pulley 7 will reduce the lifting amount of the diesel generator 12 during the approaching and moving away of the two bearing arms 10, so that the cooperation of the winding wheel and the screw sleeve 22 is more coordinated and easy to realize, and the energy waste caused by the excessive lifting amount of the diesel generator 12 during the approaching and moving away of the two bearing arms 10 is avoided, and the height requirement of the equipment is also reduced.

[0062] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

[0063] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A diesel generator test bench, comprising a machine body, two bearing arms, a lifting assembly and test equipment, the machine body is provided with support wheels; the two bearing arms are arranged side by side on the front side of the machine body, and universal wheels are arranged on the lower sides of the bearing arms; the lifting assembly comprises a lifting frame, a rope and a lifting hook, the lifting frame is fixed on the machine body and is provided with a guide wheel set, one end of the rope extends above the two bearing arms and is connected with the lifting hook; characterized in that: two guide rods, a main shaft and a driving system are arranged in the machine body; the two guide rods and the main shaft are parallel and horizontally extend in the machine body; the driving system is used for driving the main shaft to rotate and can switch the rotation direction of the main shaft; the main shaft is provided with two thread segments with opposite rotation directions, each thread segment is sleeved with a thread matched sleeve, and each sleeve is fixed with two axially spaced push plates; the two push plates close to each other on the two sleeves are inner push plates, and the two push plates far away from each other are outer push plates, and the inner push plates and the outer push plates are in sliding fit with the two guide rods; the driving parts are fixedly connected with the two guide rods, and the two driving parts are located between the inner push plates and the outer push plates of the two sleeves respectively, the axial dimension of the driving part is smaller than the distance between the inner push plate and the outer push plate located on the two sides of the driving part, so that the sleeve and the corresponding driving part can move axially within a predetermined range; the lifting assembly comprises a winding wheel fixedly connected with the main shaft, and one end of the rope away from the lifting hook extends into the machine body and is fixedly connected with the winding wheel; when the rope is completely unwound from the winding wheel, the sleeve is located in the middle of the stroke. The main shaft is fixed with a driving wheel, and the driving wheel is located between the two thread segments; the driving system comprises a motor device and an output wheel in transmission connection, the output wheel is in transmission connection with the driving wheel through a flexible piece, and the flexible piece is a synchronous belt or a transmission chain. The winding wheel is located at the middle position of the main shaft. The winding wheel is located at the middle position of the main shaft, the main shaft is fixed with a driving wheel, the driving wheel is located on one side of the winding wheel and is fixedly connected with the winding wheel, and the driving wheel is in transmission connection with the driving system.

2. The diesel engine test bed of claim 1, wherein: The support wheels are at least two and are symmetrically arranged on the two sides of the machine body in the transverse direction; the machine body is provided with a power system and a steering system matched with the support wheels, and a control system for controlling the driving system and the steering system.

3. The diesel engine test bed of claim 1, wherein: The machine body comprises a machine shell and a machine cover, the machine shell is in the shape of a square box, the main shaft, the two guide rods and the driving system are arranged in the machine shell, the machine cover is fixedly arranged on the upper side of the machine shell to seal the upper end of the machine shell, the lifting assembly and the test equipment are arranged on the upper side of the machine cover, and a rope hole is formed in the machine cover for the rope to pass through.

4. The diesel engine test bed of claim 1, wherein: The bearing arms are provided with a weighing sensor, and the upper side of the weighing sensor is provided with a supporting plate for supporting the diesel generator.

5. The diesel engine test bed of claim 1, wherein: The main shaft is located on the rear side of the two guide rods, the two guide rods are spaced apart in the vertical direction, and the driving part is in the shape of a column.

6. The diesel engine test bed of claim 1, wherein: The rear ends of the two bearing arms are respectively fixed with a crank arm on the opposite sides, and the driving part is fixedly connected with the crank arm, so that the distance between the two driving parts is smaller than the distance between the two bearing arms.

7. The diesel engine test bed of claim 1, wherein: The main shaft is located on the rear side of the two guide rods, the two guide rods are spaced apart in the vertical direction, and the driving part is in the shape of a column.

8. The diesel engine test bed of claim 1, wherein: ​ 9. The diesel engine test bed of claim 1, wherein: ​ 10. The diesel engine test bed of claim 1, wherein: The upper end of the hook is rotatably connected with a pulley, one end of the rope away from the winch is led out from the hanger downward, extends upward after passing through the pulley, and is finally locked and fixed by a locking member, the locking member is installed and fixed on the hanger.

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