CN112555645B - Fatigue test and debugging test bed for forklift portal - Google Patents

Abstract

The present invention discloses a forklift mast fatigue test and debugging test bench, including a base, a counterweight seat and two columns are fixedly installed on the top of the base, a first slide groove is opened on the side of the two columns close to each other, a first screw rod is arranged in the two first slide grooves, a first slide seat is threadedly sleeved on the two first screw rods, and the sides of the two first slide seats close to each other extend to the outside of the corresponding first slide grooves respectively. The present invention has reasonable design and good practicality, and is convenient for installing and fixing the forklift mast on the mounting plate, and is convenient for testing and debugging the stability and fatigue strength of the forklift mast, and is convenient for adjusting the height position of the lifting seat and the mounting plate, and is convenient for adjusting the spacing between the two oil cylinder connecting ears, and is suitable for installing and fixing forklift masts of different sizes, and is convenient for testing and testing for forklift masts of different sizes and models, and can meet the testing needs.

Description

A forklift mast fatigue test and debugging test bench

Technical Field

The invention relates to the technical field of forklift mast testing, in particular to a forklift mast fatigue testing and debugging test bench.

Background Art

The forklift mast is the main load-bearing structure of the forklift's picking device, a mechanism for lifting goods, also known as a gantry. It is composed of an inner mast, an outer mast, a fork frame, forks, sprockets, chains, lifting cylinders and tilting cylinders. According to the requirements of the lifting height of the forked goods, the forklift mast can be made into two or more stages. Common ordinary forklifts mostly use a two-stage mast. Common ones are three-section full-free masts, two-section full-free masts, and two-section standard masts. When the traditional forklift mast is inspected after production, it is necessary to install the forklift mast on the forklift for testing and debugging. If a problem is found in the forklift mast, the forklift mast must be removed for repair, which is very cumbersome. Nowadays, a forklift mast fatigue test and debugging test bench is usually used to test the completed forklift mast in order to test the performance of the forklift mast.

However, in the prior art, the commonly used forklift mast fatigue test and debugging test bench is not convenient for installing and fixing the forklift mast to be tested during use, the operation process is cumbersome, and the detection and debugging operations of the stability and fatigue strength of the forklift mast are inconvenient. Moreover, it is not suitable for installing and fixing forklift masts of different sizes, and is not suitable for testing forklift masts of different sizes and models, and cannot meet the testing requirements. Therefore, we propose a forklift mast fatigue test and debugging test bench to solve the above problems.

Summary of the invention

1. Technical issues to be solved

In view of the deficiencies in the prior art, the present invention provides a forklift mast fatigue test and debugging test bench, which solves the problems that the existing forklift mast fatigue test and debugging test bench is not convenient for installing and fixing the forklift mast to be tested during use, the operation process is cumbersome, the detection and debugging operations of the stability and fatigue strength of the forklift mast are inconvenient, and it is not suitable for installing and fixing forklift masts of different sizes, and is not suitable for testing forklift masts of different sizes and models, and cannot meet the detection needs.

(II) Technical solution

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a forklift gantry fatigue test and debugging test bench, comprising a base, a counterweight seat and two columns are fixedly installed on the top of the base, a first slide groove is provided on the side of the two columns close to each other, a first screw rod is provided in the two first slide grooves, a first slide seat is threadedly sleeved on the two first screw rods, and the sides of the two first slide seats close to each other extend to the outside of the corresponding first slide grooves respectively, a same cross plate is fixedly installed on the top of the two columns, a first through hole is provided on the top inner wall of the two first slide grooves, the top ends of the two first screw rods pass through the corresponding first through holes respectively, a first motor is fixedly installed on the top of the cross plate, and the output of the first motor A vertical shaft is fixedly installed at the output shaft end, and a first sprocket is fixedly sleeved on the vertical shaft and the top end of one of the two first screw rods, and a second sprocket is fixedly sleeved on the vertical shaft and the top end of the other of the two first screw rods. The same first chain is wound around the two first sprockets, and the same second chain is wound around the two second sprockets. The same lifting seat is fixedly installed on the side where the two first slides are close to each other, and two second sliding grooves are opened on the top of the lifting seat, and second screw rods are arranged in the two second sliding grooves. The threads of the two second screw rods are arranged in opposite directions, and second slides are threadedly sleeved on the two second screw rods. The tops of the two second slides extend to the outside of the corresponding second sliding grooves, and the two The top of the second slide is fixedly installed with a support column, the top of the two support columns is fixedly installed with a cylinder connecting ear, the first connecting pins are movably installed in the two cylinder connecting ears, the two first connecting pins are threaded with a first nut, the same connecting hole is opened on the inner wall of the side where the two second slides are close to each other, a connecting shaft is rotatably installed in the connecting hole, both ends of the connecting shaft extend out of the connecting hole, the ends of the two second screw rods close to each other are respectively fixedly connected to the two ends of the connecting shaft, a first gear is fixedly sleeved on the connecting shaft, a groove is opened on the bottom inner wall of the connecting hole, a second motor is fixedly installed on the bottom inner wall of the groove, a second gear is fixedly installed on the output shaft end of the second motor, and the second gear The top of the gear extends into the connecting hole and meshes with the first gear, and a mounting plate is fixedly installed at the bottom of the lifting seat, and a hydraulic oil tank is fixedly installed on the side of the lifting seat away from the mounting plate, and a hydraulic oil pump is fixedly installed on the side of the hydraulic oil tank away from the lifting seat, and an oil suction pipe is fixedly installed on the suction end of the hydraulic oil pump, and an end of the oil suction pipe away from the hydraulic oil pump extends into the hydraulic oil tank, and an oil outlet pipe is fixedly installed on the discharge end of the hydraulic oil pump, and an end of the oil outlet pipe away from the hydraulic oil pump is fixedly connected to a four-way valve, and the other three ends of the four-way valve are fixedly connected to oil delivery hoses, and the ends of the three oil delivery hoses away from the four-way valve are fixedly connected to oil pipe joints, and a plurality of positioning holes are opened on the top of the mounting plate, and the plurality of positioning holes are symmetrically arranged in pairs at equal intervals.

Preferably, second connecting pins are movably installed in four of the multiple positioning holes, and second nuts are threadedly sleeved on the four second connecting pins.

Preferably, a same outer cover is fixedly mounted on the tops of the two columns, and the first motor, the two first sprockets, the two second sprockets, the first chain and the second chain are all located inside the outer cover.

Preferably, first bearing seats are fixedly mounted on the bottom inner walls of the two first slide grooves, and the bottom ends of the two first screw rods are rotatably mounted on the corresponding first bearing seats.

Preferably, balls are embedded in the two first sliding seats on the sides away from each other, and the two balls are in rolling contact with the inner wall of one side of the corresponding first sliding groove respectively.

Preferably, a second bearing seat is fixedly mounted on the inner wall of the two second sliding grooves at a side away from each other, and the ends of the two second screw rods away from each other are rotatably mounted on the corresponding second bearing seats.

Preferably, limiting grooves are provided on the inner walls at the bottom of the two second slide grooves, limiting columns are fixedly installed at the bottom of the two second slide seats, and the two limiting columns are slidably installed in the corresponding limiting grooves respectively.

Preferably, the connecting shaft is provided with two bearings on the fixed sleeve, and the outer rings of the two bearings are fixedly connected to the inner wall of the connecting hole.

(III) Beneficial effects

The present invention provides a forklift mast fatigue test and debugging test bench, which has the following beneficial effects:

(1) The forklift gantry fatigue test and debugging test bench starts the first motor to rotate forward. Under the transmission action of the two first sprockets and the first chain, under the transmission action of the two second sprockets and the second chain, the two first screw rods rotate synchronously in the same direction, so that the two first slides drive the lifting seat, the mounting plate and the hydraulic oil tank to rise vertically. By starting the first motor to rotate backward, the first motor drives the vertical axis, the corresponding first sprocket and the corresponding second sprocket to rotate in the opposite direction, so that the two first slides drive the lifting seat, the mounting plate and the hydraulic oil tank to descend vertically, so that the height position of the lifting seat and the mounting plate can be adjusted by controlling the forward and reverse rotation of the first motor.

(2) This forklift gantry fatigue test and debugging test bench starts the second motor to rotate forward, the second motor drives the second gear to rotate, the second gear drives the first gear, the connecting shaft and the two second screws to rotate, so that the two second slides drive the corresponding support columns and the corresponding cylinder connecting ears to move toward each other. By starting the second motor to rotate backward, the second motor drives the second gear to rotate in the opposite direction, the second gear drives the first gear, the connecting shaft and the two second screws to rotate in the opposite direction, so that the two second slides drive the corresponding support columns and the corresponding cylinder connecting ears to move away from each other, thereby controlling the forward and reverse rotation of the second motor to facilitate the adjustment of the distance between the two cylinder connecting ears.

(3) The fatigue test and debugging test bench for a forklift mast is configured to place the forklift mast on the top of the mounting plate after the height position of the lifting seat and the mounting plate is adjusted appropriately and the spacing between the two cylinder connecting ears is adjusted appropriately. The forklift mast is then fixed on the mounting plate by means of the locking cooperation of four second connecting pins and four second nuts. The two tilting cylinders are then respectively connected and fixed to the corresponding cylinder connecting ears by means of the locking cooperation of two first connecting pins and two first nuts. The oil pipe joints on the three oil delivery hoses are then respectively fixedly connected to the lifting cylinder on the forklift mast and the oil inlet ends of the two tilting cylinders. Thus, the forklift mast is fixed on the mounting plate, thereby facilitating the adjustment of the height position of the lifting seat and the mounting plate and the spacing between the two cylinder connecting ears. The forklift mast is suitable for installation and fixation of forklift masts of different sizes and convenient for testing and inspecting forklift masts of different sizes and models, thereby improving the scope of application and having good practicality.

(4) The forklift mast fatigue test and debugging test bench can start the hydraulic oil pump to allow the hydraulic oil in the hydraulic oil tank to enter the lifting cylinder and two tilting cylinders from three oil hoses respectively, so as to control the movements of the lifting cylinder and two tilting cylinders on the forklift mast respectively, so as to test the fatigue performance of the forklift mast. According to needs, corresponding counterweights can be placed on the forklift mast, and the forklift mast can be controlled to continuously lift and lower, so as to test the stability and fatigue strength of the forklift mast. Moreover, by controlling the movements of the lifting cylinder and the two tilting cylinders respectively, the synchronism of the lifting and lowering of the two sides of the forklift mast can be detected and adjusted, thereby facilitating fatigue testing and debugging of the forklift mast, making testing convenient and improving work efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the main structure of the present invention;

FIG2 is a schematic diagram of a cross-sectional structure of the present invention in a front view;

FIG3 is an enlarged schematic diagram of part A in FIG2 ;

FIG4 is a schematic diagram of a cross-sectional structure of the present invention from a side view;

FIG. 5 is an enlarged schematic diagram of portion B in FIG. 4 .

In the figure: 1, base; 2, counterweight seat; 3, column; 4, first slide; 5, first screw; 6, first slide; 7, horizontal plate; 8, first motor; 9, vertical axis; 10, first sprocket; 11, second sprocket; 12, first chain; 13, second chain; 14, lifting seat; 15, second slide; 16, second screw; 17. Second slide seat; 18. Support column; 19. Cylinder connecting ear; 20. First connecting pin; 21. First nut; 22. Connecting hole; 23. Connecting shaft; 24. First gear; 25. Groove; 26. Second motor; 27. Second gear; 28. Mounting plate; 29. Hydraulic oil tank; 30. Hydraulic oil pump; 31. Suction pipe; 32. Oil outlet pipe; 33. Four-way valve; 34. Oil delivery hose; 35. Oil pipe joint; 36. Positioning hole; 37. Second connecting pin; 38. Second nut; 39. Outer cover.

DETAILED DESCRIPTION

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

As shown in FIGS. 1-5 , the present invention provides a technical solution: a forklift gantry fatigue test and debugging test bench, comprising a base 1, a counterweight seat 2 and two columns 3 are fixedly installed on the top of the base 1, a first slide groove 4 is provided on the side of the two columns 3 close to each other, a first screw rod 5 is provided in the two first slide grooves 4, a first slide seat 6 is threadedly sleeved on the two first screw rods 5, and the sides of the two first slide seats 6 close to each other extend to the outside of the corresponding first slide grooves 4 respectively, a same horizontal plate 7 is fixedly installed on the top of the two columns 3, a first through hole is provided on the top inner wall of the two first slide grooves 4, the top ends of the two first screw rods 5 pass through the corresponding first through holes respectively, a first motor 8 is fixedly installed on the top of the horizontal plate 7, a vertical shaft 9 is fixedly installed on the output shaft end of the first motor 8, and the vertical shaft 9 and one of the two first screw rods 5 are connected to the first screw rod 5 The top of each of the two first screw rods 5 is fixedly sleeved with a first sprocket 10, the top of each of the two first screw rods 5 is fixedly sleeved with a second sprocket 11, the two first sprockets 10 are wound with the same first chain 12, the two second sprockets 11 are wound with the same second chain 13, the two first slides 6 are fixedly installed with the same lifting seat 14 on the side close to each other, the top of the lifting seat 14 is provided with two second slide grooves 15, the two second slide grooves 15 are provided with a second screw rod 16, the threads of the two second screw rods 16 are arranged in opposite directions, the two second screw rods 16 are threadedly sleeved with a second slide seat 17, the tops of the two second slide seats 17 extend to the outside of the corresponding second slide grooves 15 respectively, the tops of the two second slide seats 17 are fixedly installed with support columns 18, the tops of the two support columns 18 are fixedly installed with cylinder connecting ears 19, the two cylinder connecting ears A first connecting pin 20 is movably installed in each of the two connecting pins 19, and a first nut 21 is threadedly sleeved on each of the two first connecting pins 20. A same connecting hole 22 is provided on the inner wall of the side where the two second slide grooves 15 are close to each other, and a connecting shaft 23 is rotatably installed in the connecting hole 22. Both ends of the connecting shaft 23 extend to the outside of the connecting hole 22, and the ends of the two second screw rods 16 close to each other are fixedly connected to the two ends of the connecting shaft 23 respectively. A first gear 24 is fixedly sleeved on the connecting shaft 23, and a groove 25 is provided on the bottom inner wall of the connecting hole 22. A second motor 26 is fixedly installed on the bottom inner wall of the groove 25, and a second gear 27 is fixedly installed on the output shaft end of the second motor 26. The top of the second gear 27 extends into the connecting hole 22 and meshes with the first gear 24. A mounting plate 28 is fixedly installed at the bottom of the lifting seat 14, and a hydraulic oil tank 29 is fixedly installed on the side of the lifting seat 14 away from the mounting plate 28. A hydraulic oil pump 30 is fixedly installed on the side of the hydraulic oil tank 29 away from the lifting seat 14. The hydraulic oil pump 30 An oil suction pipe 31 is fixedly installed at the suction end of the hydraulic oil pump 30, and the end of the oil suction pipe 31 away from the hydraulic oil pump 30 extends into the hydraulic oil tank 29. An oil outlet pipe 32 is fixedly installed at the discharge end of the hydraulic oil pump 30. The end of the oil outlet pipe 32 away from the hydraulic oil pump 30 is fixedly connected to a four-way valve 33, and the other three ends of the four-way valve 33 are fixedly connected to oil delivery hoses 34. The ends of the three oil delivery hoses 34 away from the four-way valve 33 are fixedly connected to oil pipe joints 35. A plurality of positioning holes 36 are opened on the top of the mounting plate 28, and the plurality of positioning holes 36 are symmetrically arranged in pairs at equal intervals.

In this embodiment, second connecting pins 37 are movably installed in four of the plurality of positioning holes 36 , and second nuts 38 are threadedly sleeved on the four second connecting pins 37 .

In this embodiment, a same outer cover 39 is fixedly mounted on the top of the two columns 3 , and the first motor 8 , two first sprocket wheels 10 , two second sprocket wheels 11 , the first chain 12 and the second chain 13 are all located inside the outer cover 39 .

In this embodiment, first bearing seats are fixedly mounted on the bottom inner walls of the two first slide grooves 4, and the bottom ends of the two first screw rods 5 are rotatably mounted on the corresponding first bearing seats.

In this embodiment, balls are embedded in the two first sliding seats 6 at the sides away from each other, and the two balls are in rolling contact with the inner wall of one side of the corresponding first sliding groove 4 respectively.

In this embodiment, second bearing seats are fixedly mounted on the inner walls of the two second slide grooves 15 at a side away from each other, and ends of the two second screw rods 16 away from each other are rotatably mounted on the corresponding second bearing seats.

In this embodiment, the bottom inner walls of the two second slide grooves 15 are provided with limiting grooves, the bottoms of the two second slide seats 17 are fixedly installed with limiting columns, and the two limiting columns are slidably installed in the corresponding limiting grooves respectively.

In this embodiment, two bearings are fixedly sleeved on the connecting shaft 23 , and the outer rings of the two bearings are fixedly connected to the inner wall of the connecting hole 22 .

In this embodiment, when in use, a multi-control switch and an external power line are fixedly installed on one side of one of the two columns 3. The first motor 8 and the second motor 26 are both reversible motors. The first motor 8, the second motor 26, the hydraulic oil pump 30, the multi-control switch and the external power line are electrically connected in sequence through wires to form a circuit. The control switch can separately control the start and stop and the forward and reverse operation of the first motor 8 and the second motor 26, and can also control the start and stop of the hydraulic oil pump 30. An appropriate amount of hydraulic oil is stored in the hydraulic oil tank 29. By starting the first motor 8 to rotate forward, the first motor 8 drives the vertical shaft 9, the corresponding first sprocket 10 and the corresponding second sprocket 11 to rotate. Under the transmission action of the two first sprockets 10 and the first chain 12, under the transmission action of the two second sprockets 11 and the second chain 13, the two first screw rods 5 rotate synchronously in the same direction. Since the two first slides 6 are respectively threadedly connected and cooperated with the corresponding first screw rods 5, the two first slides 6 drive the lifting seat 14, the mounting plate 28 and the hydraulic oil tank 29 to rise vertically, and the two first slides 6 drives the corresponding balls to roll on the inner wall of one side of the corresponding first slide groove 4. Similarly, by starting the first motor 8 to rotate in reverse, the first motor 8 drives the vertical shaft 9, the corresponding first sprocket 10 and the corresponding second sprocket 11 to rotate in the opposite direction. Under the transmission action of the two first sprockets 10 and the first chain 12, under the transmission action of the two second sprockets 11 and the second chain 13, the two first screw rods 5 rotate synchronously in the same direction, so that the two first slide seats 6 drive the lifting seat 14, the mounting plate 28 and the hydraulic oil tank 29 to vertically descend, so that by controlling the forward and reverse rotation of the first motor 8, the height position of the lifting seat 14 and the mounting plate 28 can be adjusted. By starting the second motor 26 to rotate in the forward direction, the second motor 26 drives the second gear 27 to rotate, and the second gear 27 drives the first gear 24, the connecting shaft 23 and the two second screw rods 16 to rotate. Since the thread rotation directions of the two second screw rods 16 are set in opposite directions, the two second slide seats 17 drive the corresponding support columns 18 and the corresponding cylinder connecting ears 19 to move in the direction of approaching each other, and the two second slide seats 17 drives the corresponding limiting columns to slide in the corresponding limiting grooves respectively. Similarly, by starting the second motor 26 to reverse, the second motor 26 drives the second gear 27 to rotate in the opposite direction. The second gear 27 drives the first gear 24, the connecting shaft 23 and the two second screw rods 16 to rotate in the opposite direction, so that the two second slide seats 17 drive the corresponding supporting columns 18 and the corresponding cylinder connecting ears 19 to move away from each other. Therefore, by controlling the forward and reverse rotation of the second motor 26, it is convenient to adjust the distance between the two cylinder connecting ears 19. According to the height and width of the forklift mast, after the height position of the lifting seat 14 and the mounting plate 28 is adjusted appropriately, After the spacing between the two oil cylinder connecting ears 19 is adjusted appropriately, the forklift mast is placed on the top of the mounting plate 28, so that the four second connecting pins 37 and the four second nuts 38 are locked together, and the forklift mast can be installed and fixed on the mounting plate 28, and then the two tilting oil cylinders on the forklift mast are respectively connected to the corresponding oil cylinder connecting ears 19, and the two first connecting pins 20 and the two first nuts 21 are locked together to connect and fix the two tilting oil cylinders to the corresponding oil cylinder connecting ears 19, and then the oil pipe joints 35 on the three oil delivery hoses 34 are respectively fixedly connected to the lifting oil cylinder on the forklift mast and the oil inlet ends of the two tilting oil cylinders. The forklift mast is connected, thereby completing the installation and fixing of the forklift mast on the mounting plate 28, so that it is convenient to adjust the height position of the lifting seat 14 and the mounting plate 28, and it is convenient to adjust the distance between the two cylinder connecting ears 19, which is suitable for installing and fixing forklift masts of different sizes, so as to facilitate the detection and testing of forklift masts of different sizes and models, thereby improving the scope of application and having good practicality. By starting the hydraulic oil pump 30, the hydraulic oil in the hydraulic oil tank 29 passes through the oil suction pipe 31, the hydraulic oil pump 30, the oil outlet pipe 32, the four-way valve 33 and the three oil delivery hoses 34 in sequence and enters the lifting cylinder and the two tilting cylinders respectively, so that the lifting cylinder and the two tilting cylinders can be controlled respectively. By controlling the movement of the lifting cylinder and the two tilting cylinders on the forklift mast, the fatigue performance of the forklift mast can be tested. During the test, corresponding counterweights can be placed on the forklift mast as needed, and the forklift mast can be controlled to continuously move up and down, so as to test the stability and fatigue strength of the forklift mast. Moreover, by separately controlling the movement of the lifting cylinder and the two tilting cylinders, the synchronization of the lifting and lowering of both sides of the forklift mast can be detected and adjusted, thereby facilitating fatigue testing and debugging of the forklift mast, facilitating testing and improving work efficiency. At the same time, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

In summary, the fatigue test and debugging test bench for the forklift gantry starts the first motor 8 to rotate forward, and under the transmission action of the two first sprockets 10 and the first chain 12, under the transmission action of the two second sprockets 11 and the second chain 13, the two first screw rods 5 are synchronously rotated in the same direction, so that the two first slides 6 drive the lifting seat 14, the mounting plate 28 and the hydraulic oil tank 29 to rise vertically, and the first motor 8 is started to rotate reversely, and the first motor 8 drives the vertical shaft 9, the corresponding first sprocket 10 and the corresponding second sprocket 11 to rotate in the opposite direction, so that the two first slides 6 drive the lifting seat 14, the mounting plate 28 and the hydraulic oil tank 29 to descend vertically, so that the lifting seat 14 and the mounting plate 28 can be adjusted by controlling the forward and reverse rotation of the first motor 8. The height position of 28 is adjusted by starting the second motor 26 to rotate forward, the second motor 26 drives the second gear 27 to rotate, the second gear 27 drives the first gear 24, the connecting shaft 23 and the two second screw rods 16 to rotate, so that the two second slides 17 drive the corresponding support column 18 and the corresponding oil cylinder connecting ear 19 to move in a direction close to each other, and by starting the second motor 26 to rotate reversely, the second motor 26 drives the second gear 27 to rotate in the opposite direction, the second gear 27 drives the first gear 24, the connecting shaft 23 and the two second screw rods 16 to rotate in the opposite direction, so that the two second slides 17 drive The corresponding support columns 18 and the corresponding oil cylinder connecting ears 19 move in the direction away from each other, so that the spacing between the two oil cylinder connecting ears 19 can be adjusted by controlling the forward and reverse rotation of the second motor 26. After the height position of the lifting seat 14 and the mounting plate 28 is adjusted appropriately, and the spacing between the two oil cylinder connecting ears 19 is adjusted appropriately, the forklift mast is placed on the top of the mounting plate 28, and the forklift mast is fixed on the mounting plate 28 by the locking cooperation of the four second connecting pins 37 and the four second nuts 38, and then the two tilting oil cylinders are respectively connected and fixed to the corresponding oil cylinder connecting ears 19 by the locking cooperation of the two first connecting pins 20 and the two first nuts 21, and then the oil pipe joints 35 on the three oil delivery hoses 34 are respectively fixedly connected to the lifting oil cylinder on the forklift mast and the oil inlet ends of the two tilting oil cylinders, that is, the forklift mast is installed and fixed on the mounting plate 28, so that the height position of the lifting seat 14 and the mounting plate 28 can be adjusted, and the two oil cylinder connecting ears can be adjusted appropriately. The spacing between 19 can be adjusted, which is suitable for installing and fixing forklift masts of different sizes, and is convenient for testing forklift masts of different sizes and models, thereby improving the scope of application and having good practicality. By starting the hydraulic oil pump 30, the hydraulic oil in the hydraulic oil tank 29 enters the lifting cylinder and the two tilting cylinders from the three oil delivery hoses 34 respectively, so that the lifting cylinder and the two tilting cylinders on the forklift mast can be controlled respectively, so that the fatigue performance of the forklift mast can be tested, and corresponding counterweights can be placed on the forklift mast as needed, and the continuous lifting movement of the forklift mast can be controlled, so that the stability and fatigue strength of the forklift mast can be tested, and by respectively By controlling the actions of the lifting cylinder and the two tilting cylinders, the synchronization of the lifting and lowering of the two sides of the forklift mast can be detected and adjusted, thereby facilitating fatigue testing and debugging of the forklift mast, facilitating testing, and improving work efficiency. The present invention has reasonable design and good practicality, and is convenient for installing and fixing the forklift mast on the mounting plate 28, so as to facilitate testing and debugging of the stability and fatigue strength of the forklift mast, and is convenient for adjusting the height position of the lifting seat 14 and the mounting plate 28, and is convenient for adjusting the distance between the two cylinder connecting ears 19. It is suitable for installing and fixing forklift masts of different sizes, and is convenient for testing and testing for forklift masts of different sizes and models, and can meet testing needs.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A forklift mast fatigue test and debugging test bench, comprising a base (1), characterized in that: a counterweight seat (2) and two columns (3) are fixedly installed on the top of the base (1), a first slide groove (4) is provided on the side of the two columns (3) close to each other, a first screw rod (5) is provided in the two first slide grooves (4), a first slide seat (6) is threadedly sleeved on the two first screw rods (5), the side of the two first slide seats (6) close to each other respectively extends to the outside of the corresponding first slide groove (4), and the top of the two columns (3) is fixedly installed The same horizontal plate (7) is installed, the top inner walls of the two first slide grooves (4) are each provided with a first through hole, the top ends of the two first screw rods (5) respectively penetrate the corresponding first through holes, a first motor (8) is fixedly installed on the top of the horizontal plate (7), a vertical shaft (9) is fixedly installed on the output shaft end of the first motor (8), a first sprocket (10) is fixedly sleeved on the vertical shaft (9) and on the top end of one of the two first screw rods (5), and a first sprocket (10) is fixedly sleeved on the vertical shaft (9) and on the top end of the other of the two first screw rods (5). A second sprocket (11) is sleeved thereon, a first chain (12) is wound around the two first sprockets (10), a second chain (13) is wound around the two second sprockets (11), a lifting seat (14) is fixedly mounted on one side of the two first slide seats (6) close to each other, two second slide grooves (15) are provided on the top of the lifting seat (14), a second screw rod (16) is provided in each of the two second slide grooves (15), the threads of the two second screw rods (16) are arranged in opposite directions, and a second screw rod (16) is threadedly sleeved thereon. The slide seat (17), the tops of the two second slide seats (17) respectively extend to the outside of the corresponding second slide grooves (15), the tops of the two second slide seats (17) are fixedly installed with support columns (18), the tops of the two support columns (18) are fixedly installed with oil cylinder connecting ears (19), the two oil cylinder connecting ears (19) are movably installed with first connecting pins (20), the two first connecting pins (20) are threadedly sleeved with first nuts (21), and the inner walls of the two second slide grooves (15) on the side close to each other are provided with a same connecting hole (22), A connecting shaft (23) is rotatably mounted in the connecting hole (22), both ends of the connecting shaft (23) extend outside the connecting hole (22), the ends of the two second screw rods (16) close to each other are fixedly connected to the two ends of the connecting shaft (23), a first gear (24) is fixedly sleeved on the connecting shaft (23), a groove (25) is provided on the bottom inner wall of the connecting hole (22), a second motor (26) is fixedly mounted on the bottom inner wall of the groove (25), a second gear (27) is fixedly mounted on the output shaft end of the second motor (26), and the second gear (24) is fixedly mounted on the output shaft end of the second motor (26). The top of the lifting seat (27) extends into the connecting hole (22) and meshes with the first gear (24), the bottom of the lifting seat (14) is fixedly mounted with a mounting plate (28), a hydraulic oil tank (29) is fixedly mounted on a side of the lifting seat (14) away from the mounting plate (28), a hydraulic oil pump (30) is fixedly mounted on a side of the hydraulic oil tank (29) away from the lifting seat (14), an oil suction pipe (31) is fixedly mounted on the suction end of the hydraulic oil pump (30), an end of the oil suction pipe (31) away from the hydraulic oil pump (30) extends into the hydraulic oil tank (29), and the hydraulic oil pump An oil outlet pipe (32) is fixedly installed at the discharge end of the hydraulic oil pump (30), one end of the oil outlet pipe (32) away from the hydraulic oil pump (30) is fixedly connected to a four-way valve (33), the other three ends of the four-way valve (33) are fixedly connected to oil delivery hoses (34), and one end of the three oil delivery hoses (34) away from the four-way valve (33) is fixedly connected to an oil pipe joint (35), and a plurality of positioning holes (36) are opened on the top of the mounting plate (28), and the plurality of positioning holes (36) are symmetrically arranged in pairs at equal intervals, and four of the plurality of positioning holes (36) are provided in A second connecting pin (37) is movably installed on each of the four second connecting pins (37), and a second nut (38) is threadedly sleeved on each of the four second connecting pins (37). A same outer cover (39) is fixedly installed on the top of the two uprights (3), and the first motor (8), the two first sprocket wheels (10), the two second sprocket wheels (11), the first chain (12) and the second chain (13) are all located in the outer cover (39). A first bearing seat is fixedly installed on the inner wall of the bottom of the two first slide grooves (4), and the bottom ends of the two first screw rods (5) are rotatably installed on the corresponding first bearing seats. 2. A forklift gantry fatigue test and debugging test bench according to claim 1, characterized in that: balls are embedded on the sides of the two first slide seats (6) away from each other, and the two balls are in rolling contact with the inner wall of one side of the corresponding first slide groove (4). 3. A forklift mast fatigue test and debugging test bench according to claim 1, characterized in that: second bearing seats are fixedly installed on the inner walls of the two second slide grooves (15) on the side away from each other, and the ends of the two second screw rods (16) away from each other are rotatably installed on the corresponding second bearing seats. 4. A forklift mast fatigue test and debugging test bench according to claim 1, characterized in that: limiting grooves are provided on the inner walls at the bottom of the two second slide grooves (15), limiting columns are fixedly installed at the bottom of the two second slide seats (17), and the two limiting columns are slidably installed in the corresponding limiting grooves respectively. 5. A forklift mast fatigue test and debugging test bench according to claim 1, characterized in that: two bearings are fixedly sleeved on the connecting shaft (23), and the outer rings of the two bearings are fixedly connected to the inner wall of the connecting hole (22).