A diesel engine test bench

Abstract

The present application relates to the technical field of generator test equipment, and 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 thread segments with opposite rotation directions are arranged on the main shaft, a threaded sleeve is arranged on each thread segment, and an inner push plate and an outer push plate which are in sliding connection with the guide rods are fixed on each threaded sleeve; a driving part is arranged at the rear end of each bearing arm, the driving parts are in sliding connection with the two guide rods, and the two driving parts are respectively arranged between the inner push plates and the outer push plates of the two threaded sleeves; the lifting assembly comprises a rope, a lifting hook and a winding wheel, the winding wheel is fixedly connected with the main shaft, one end of the rope is connected with the lifting hook, and the other end of the rope is connected with the winding wheel. The test bench can independently complete loading and unloading of the diesel generator, and is flexible and convenient; the position adjustment of the bearing arms and the lifting work of the diesel generator are jointly powered by a main shaft and a driving system, so that 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 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 need to be respectively provided with a driving system for driving and controlling, 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:

[0005] 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 the lower side of the bearing arm is provided with a universal wheel; 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;

[0006] The machine body is internally provided with two guide rods, a main shaft and a driving system; 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 rotating 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 screw sleeve in thread cooperation, and each screw sleeve is fixed with two axially spaced push plates; the two push plates close to each other on the two screw 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 cooperation with the two guide rods.

[0007] The rear end of the bearing arm is fixedly connected with a driving part, the driving part is in sliding cooperation with the two guide rods, the two driving parts are respectively located between the inner push plates and the outer push plates of the two screw sleeves, 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 screw sleeve and the corresponding driving part can move axially in a predetermined range.

[0008] The hoisting assembly comprises a winding drum fixedly connected with the main shaft, and the end of the rope away from the hook extends into the machine body and is fixedly connected with the winding drum; when the rope is completely unwound from the winding drum, the screw sleeve is located at the middle of the stroke.

[0009] Preferably, the main shaft is fixedly provided 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 cooperation, the output wheel is in transmission cooperation with the driving wheel through a flexible piece, and the flexible piece is a synchronous belt or a transmission chain.

[0010] Preferably, the winding drum is located at the middle position of the main shaft.

[0011] Preferably, the winding drum is located at the middle position of the main shaft, the main shaft is fixedly provided with a driving wheel, the driving wheel is located on one side of the winding drum and fixedly connected with the winding drum, and the driving wheel is in transmission cooperation with the driving system.

[0012] Preferably, the supporting wheel is provided with at least two supporting wheels, and the two supporting wheels are symmetrically distributed on the two sides of the machine body in the transverse direction; the machine body is internally provided with a power system and a steering system matched with the supporting wheel, and a control system for controlling the driving system and the steering system.

[0013] Preferably, 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 installed in the machine shell, the machine cover is fixedly installed on the upper side of the machine shell to block the upper port of the machine shell, the hoisting assembly and the test equipment are installed on the upper side of the machine cover, and a rope hole for the rope to pass through is formed in the machine cover.

[0014] Preferably, a weighing sensor is installed on the bearing arm, and a supporting plate for supporting the diesel generator is arranged on the upper side of the weighing sensor.

[0015] Preferably, the main shaft is located at the rear side of the two guide rods, and the two guide rods are spaced apart from each other in the up-down direction, and the driving part is in the shape of a column.

[0016] Preferably, the two bearing arms are respectively fixed with a toggle arm at the rear end of 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.

[0017] Preferably, the upper end of the hook is rotatably connected with a pulley, and the rope is led out from the hanger downward, passes through the pulley and extends upward, and is finally locked and fixed by a locking member, and the locking member is fixedly installed on the hanger.

[0018] Preferably, the lower side of each bearing arm is provided with at least two universal wheels.

[0019] Compared with the prior art, the diesel generator test bench in the application has the following beneficial technical effects:

[0020] 1. The test bench adopts a movable design, the position is convenient to adjust, the loading and unloading of the diesel generator can be independently completed, other equipment is not required to assist, the requirement for site space conditions is significantly reduced, and flexibility is convenient; in particular, the loading and unloading can be completed in place at the placement position of the diesel generator, and the operation space is significantly saved.

[0021] 2. Based on the delicate structure design, 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, the overall structure of the test bench is greatly simplified, the manufacturing cost and working energy consumption are significantly reduced, and the flexibility is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] 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.

[0023] Figure 1 It is an overall structure schematic diagram of the test bench in the embodiment.

[0024] Figure 2 It is a state schematic diagram of the test bench in the embodiment when the diesel generator is hoisted.

[0025] Figure 3 It is a state schematic diagram of the test bench in the embodiment when the diesel generator is tested.

[0026] Figure 4 It is a structure schematic diagram of the inside of the body in the embodiment.

[0027] Figure 5 Structure diagram of two carrying arms in the embodiment.

[0028] Figure 6 Structure diagram of two carrying arms and the body in the embodiment.

[0029] Figure 7 Structure diagram of the lifting assembly and the body in the embodiment.

[0030] Figure 8 State diagram of lifting the diesel generator from the ground in the loading process.

[0031] Figure 9 Transmission state diagram of lifting the diesel generator from the ground in the loading process.

[0032] Figure 10 Transmission state diagram of two carrying arms approaching in the loading process.

[0033] Figure 11 State diagram of lowering the diesel generator in the loading process.

[0034] Figure 12 Transmission state diagram of lowering the diesel generator in the loading process.

[0035] Figure 13 State diagram of lifting the diesel generator from the two carrying arms in the unloading process.

[0036] Figure 14 Transmission state diagram of lifting the diesel generator from the two carrying arms in the unloading process.

[0037] Figure 15 Transmission state diagram of two carrying arms moving away in the unloading process.

[0038] Figure 16 State diagram of lowering the diesel generator in the unloading process.

[0039] Figure 17 Transmission state diagram of lowering the diesel generator in the unloading process.

[0040] In the figure: 1, body, 101, cover, 102, shell, 2, test equipment, 3, guide wheel group, 4, hanger, 5, locking piece, 6, rope, 7, pulley, 8, lifting hook, 9, universal wheel, 10, bearing arm, 11, support wheel, 12, diesel generator, 13, supporting plate, 14, motor device, 15, synchronous belt, 16, output wheel, 17, drive wheel, 18, guide rod, 19, outer push plate, 20, inner push plate, 21, winding wheel, 22, threaded sleeve, 23, main shaft, 24, load cell, 25, crank arm, 26, driving part, 27, sliding hole, 28, rope hole. DETAILED DESCRIPTION

[0041] To make the objectives, 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 some but not all of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0042] 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 body 1, two bearing arms 10, a lifting assembly and test equipment 2.

[0043] Referring to Figures 1-4 As shown in the figure, the body 1 is provided with a plurality of support wheels 11 on the lower side, and the body 1 is internally provided with two guide rods 18, a main shaft 23 and a driving system; the two guide rods 18 and the main shaft 23 are parallel to each other and horizontally extend in the body 1; the two ends of the guide rod 18 are fixedly connected with the body 1, and the two ends of the main shaft 23 are rotatably connected with the body 1 through a shaft seat, the main shaft 23 is fixedly provided with a drive wheel 17 and the center axes of the two coincide; the driving system is in transmission connection with the drive wheel 17, used for driving the main shaft 23 to rotate and capable of switching the rotation direction of the main shaft 23; the main shaft 23 is provided with two threaded sections, the rotation directions of the two threaded sections are opposite, and the two threaded sections are respectively located on the two sides of the drive wheel 17; each threaded section is provided with a threaded sleeve 22 in a threaded fit, and each threaded sleeve 22 is fixedly provided with two push plates 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 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.

[0044] Referring to Figures 1-6 As shown in the figure, the carrying arms 10 extend in the front-rear direction, and two carrying arms 10 are distributed side by side on the front side of the machine body 1; the lower side of the carrying 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 and the two guide rods 18 are in sliding fit, thereby enabling the driving part 26 to move transversely 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, and 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 axially relative to each other within a predetermined range; thus, when the two screw sleeves 22 are away from each other, the screw sleeve 22 can drive the corresponding carrying arm 10 to move only after the inner push plate 20 contacts the corresponding driving part 26, so that the two carrying arms 10 move away from each other; similarly, when the two screw sleeves 22 are close to each other, the screw sleeve 22 can drive the corresponding carrying arm 10 to move only after the outer push plate 19 contacts the corresponding driving part 26, so that the two carrying arms 10 move close to each other.

[0045] Referring to Figures 1-3 , Figure 7 As shown in the figure, 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 carrying 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 end of the stroke.

[0046] As Figure 1 , Figure 2 As shown in the figure, the test equipment 2 is fixedly installed on the machine body 1, and according to the test requirements, the diesel generator 12 is tested for electrical performance, load characteristics and safety, etc.

[0047] 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:

[0048] 1. Position adjustment.

[0049] The main shaft 23 is driven to rotate by the drive system, causing the two threaded sleeves 22 to move away from each other, thereby increasing the distance between the two bearing arms 10 to be sufficient to accommodate the diesel generator 12; the position of this test bench is moved so that the diesel generator 12 is located on the front side of the body 1 and between the two bearing arms 10; a suitable lifting point is selected on the diesel generator 12 and connected to 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 taut state.

[0050] 2. Loading of the diesel generator.

[0051] like Figure 8 , Figure 9 As shown, the drive system drives the main shaft 23 to rotate, causing the two threaded sleeves 22 to move closer together. Since the outer push plate 19 and the drive unit 26 are in a distant state, the two supporting arms 10 will not move immediately. As the winch 21 rotates with the main shaft 23, it first unwinds the wound rope 6. After unwinding, the rope 6 will be wound around the winch 21 on the other side, thereby lifting the diesel generator 12. Afterwards, as... Figure 10 As shown, the push plate 19 will contact the drive unit 26, and the two bearing arms 10 will be driven by the two screw sleeves 22 to move towards the center, thereby moving to below the diesel generator 12; then, as... Figure 11 , Figure 12 As shown, the drive system switches the rotation direction of the main shaft 23, and the winch 21 unwinds the rope 6 until the diesel generator 12 descends onto the two support arms 10. During the descent of the diesel generator 12, the two screw sleeves 22 move away from each other. However, since the inner push plate 20 and the drive unit 26 are in a state of distance, the position of the two support arms 10 will not change, thus ensuring that the diesel generator 12 descends onto the two support arms 10 to achieve the loading of the diesel generator 12.

[0052] 3. Unloading the diesel generator.

[0053] like Figure 13 , Figure 14 As shown, after the test is completed, the drive system drives the main shaft 23 to rotate, causing the two threaded sleeves 22 to move away. Since the inner push plate 20 and the drive unit 26 are in a state of distance, the two bearing arms 10 will not move immediately. As the winch 21 rotates with the main shaft 23, it first unwinds the wound rope 6. After unwinding, the rope 6 will be wound around the winch 21 on the other side, thereby lifting the diesel generator 12. After that, as... Figure 15 As shown, the inner push plate 20 contacts the drive unit 26, and the two bearing arms 10 are driven away by the two threaded sleeves 22 to move out from under the diesel generator 12; then, as Figure 16 , Figure 17As shown, the rotation direction of the main shaft 23 is switched by the driving system, the winch wheel 21 unwinds the rope 6 until the diesel generator 12 is lowered to the ground, and in the process of lowering the diesel generator 12, the two nuts 22 are close to each other, but since the outer push plate 19 and the driving part 26 are in a state of moving away, the position of the two bearing arms 10 does not change, thereby ensuring that the diesel generator 12 is lowered to the ground, thereby completing the unloading of the diesel generator 12.

[0054] In the implementation of the test bench in the present application, in combination 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 winch wheel 21 and the length of the rope 6 and other specific parameters are routinely debugged, and there is no technical obstacle to realize the above functions, thereby achieving the intended technical purpose of the present application.

[0055] Referring to Figures 8-17 As shown, the remarkable 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 loading and unloading; the winding direction of the rope 6 by the winch wheel 21 can be automatically adjusted, thereby realizing the specific lifting requirements under two different working conditions of 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 powered 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 miniaturization design and improving flexibility.

[0056] The test bench adopts a movable design, which is convenient to adjust the position and is not limited to a fixed work site, and can independently complete the loading and unloading of the diesel generator without the assistance of other equipment, thereby significantly reducing the requirements for site space conditions, being flexible and convenient, and especially being able to complete loading and unloading on site at the placement position of the diesel generator, thereby significantly saving operation space; at the same time, the test bench adopts a movable design, and has a lifting function integrated therein, so that after the test is completed, the test bench can serve as a transfer vehicle to transfer the diesel generator for a short distance, thereby improving the overall production efficiency of the diesel generator.

[0057] 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, thereby having strong practicability.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] See Figure 1 , Figure 4 , Figure 7As shown in the preferred embodiment, the machine body 1 comprises a casing 102 and a cover 101, the casing 102 is a square box, the main shaft 23, the two guide rods 18 and the driving system are installed in the casing 102, the cover 101 is fixedly installed on the upper side of the casing 102 to block the upper port of the casing 102, the lifting assembly and the test equipment 2 are fixedly installed on the upper side of the cover 101, and the cover 101 is provided with a rope hole 28 through which the rope 6 passes; thus, the transmission structure is located in a relatively closed space, is avoided from being directly exposed to the outside, and the cooperation stability and the operation safety are improved.

[0064] Referring to Figure 3 , Figure 5 As shown in the preferred embodiment, the load-bearing arm 10 is provided with a load cell 24, and the upper side of the load cell 24 is provided with a supporting plate 13 for supporting the diesel generator 12; when the diesel generator 12 is supported by the two load-bearing arms 10, the load cell 24 can collect the weight data of the diesel generator 12, so as to obtain test data such as the overall weight, the fuel consumption rate and the operation stability based on the weight data.

[0065] Referring to Figure 4 , Figure 6 As shown in the preferred embodiment, the main shaft 23 is located at the rear side of the two guide rods 18, the two guide rods 18 are distributed in an upper-lower interval, and the driving part 26 is in a columnar shape to facilitate the sliding cooperation with the two guide rods 18 distributed in an upper-lower interval; thus, the cooperation stability of the machine body 1 and the two load-bearing arms 10 is ensured, the layout of the above components is optimized, and the overall structure is more compact.

[0066] Referring to Figure 5 , Figure 6 As shown in the preferred embodiment, the two load-bearing arms 10 are respectively fixed with a toggle arm 25 at the rear end of the relative side, the driving part 26 is fixedly connected with the toggle arm 25, the distance between the two driving parts 26 is less than the distance between the two load-bearing arms 10, the length requirement of the main shaft 23 and the two guide rods 18 is reduced, and the transverse dimension of the machine body 1 is further reduced.

[0067] Referring to 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.

[0068] 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.

[0069] 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 three are parallel and horizontally extend laterally 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; a driving wheel is fixed on the main shaft and 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; a driving part is fixedly connected to the rear end of each bearing arm and is in sliding connection 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 at the middle of the stroke. the winding wheel is located at the middle position of the main shaft.

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 lateral direction; the machine body is provided with a power system and a steering system matched with the support wheels, and a control system for regulating and 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: a weighing sensor is arranged on the bearing arm, and a supporting plate for bearing the diesel generator is arranged on the upper side of the weighing sensor.

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

6. The diesel engine test bed of claim 1, wherein: a crank is fixedly arranged on the opposite side of the rear end of each bearing arm, and the driving part is fixedly connected with the crank, 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 upper end of the lifting hook is rotatably connected with a pulley, one end of the rope away from the winding wheel is led out downward from the lifting frame, extends upward after passing through the pulley, and is finally locked and fixed by a locking piece, and the locking piece is fixedly arranged on the lifting frame.

8. The diesel engine test bed of claim 1, wherein: ​

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