Three-fulcrum steering axle steering endurance fatigue test tool

Abstract

The utility model discloses a steering endurance fatigue test tool for a three-fulcrum steering axle, which comprises the three-fulcrum steering axle and supporting seats fixed on two sides of a test platform, a liftable test frame is mounted between the supporting seats on the two sides, and a slewing bearing seat of the three-fulcrum steering axle is fixedly mounted on the test frame. An oil port of the three-fulcrum steering axle is connected with an oil pipe and used for driving the three-fulcrum steering axle to steer, a pressing mechanism is arranged above the test frame and used for driving the test frame to ascend and descend, the three-fulcrum steering axle descends along with the test frame, and the lower edge of a steering wheel of the three-fulcrum steering axle abuts against the test platform. The special tool for testing the steering endurance fatigue of the three-fulcrum steering axle can test the endurance fatigue condition of the three-fulcrum steering axle during steering in a laboratory, loading for testing is not needed, the operation is convenient, the test period is shortened, and the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of the processing of three-point steering axles, in particular to a durability fatigue test tool for the steering of a three-point steering axle. Background Art

[0002] Industrial vehicles refer to power-driven motor vehicles used for carrying, pushing, towing, lifting, stacking or palletizing various goods, including forklifts: reach forklifts, straddle forklifts, counterbalance forklifts, straddle carriers, side loaders; single-drum loaders: tractors, trailers, chassis trucks, etc. The characteristic of industrial vehicles is that a hoisting, conveying, towing or loading device is installed on a wheeled trackless chassis for mobile operation.

[0003] As one of the important components of industrial vehicles, the three-point steering axle is usually an actuator used to change or maintain the driving direction of industrial vehicles and is usually installed at the rear of the vehicle.

[0004] In order to verify the reliability of the three-point steering axle, it is usually necessary to install the three-point steering axle on the whole vehicle for repeated tests. Obviously, this test method requires a long cycle and cannot detect quality hidden dangers in the first time. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and provide a durability fatigue test tool for the steering of a three-point steering axle, which can realize the durability fatigue test of the three-point steering axle during steering in the laboratory without being installed on the vehicle for testing, so as to be convenient for operation, shorten the test cycle and be beneficial to ensuring the product quality.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A durability fatigue test tool for the steering of a three-point steering axle includes a three-point steering axle and support seats fixed on both sides of a test platform. It is characterized in that: a test frame capable of lifting is installed between the support seats on both sides, the slewing bearing seat of the three-point steering axle is fixedly installed on the test frame, the oil ports of the three-point steering axle are connected with oil pipes for driving the three-point steering axle to steer, a pressing mechanism is arranged above the test frame for driving the test frame to lift, and the three-point steering axle descends with the test frame, and the lower edges of the steering wheels of the three-point steering axle abut against the test platform.

[0008] Furthermore, each support seat includes a base and a connecting plate fixed on the base, and a guiding column extending upward is fixedly installed on the connecting plate.

[0009] Further, the test stand includes a bottom plate, two support plates, and a top plate. The two ends of the bottom plate are respectively and slidably sleeved on the guide columns on both sides. The two support plates are respectively and fixedly connected to both sides of the bottom plate, and the top plate is fixedly connected to the tops of the two support plates.

[0010] Further, a notch is provided on the front side of the bottom plate, and through holes are provided on both sides of the notch on the bottom plate. Bolts pass through the through holes on the slewing bearing seat of the three-point steering axle from top to bottom and the through holes and extend out. A locking nut is screwed on the extending end of the bolt, and the locking nut is tightened and abuts against the bottom surface of the bottom plate to fixedly install the slewing bearing seat of the three-point steering axle on the bottom plate.

[0011] Further, the pressing mechanism includes an oil cylinder. The piston rod of the oil cylinder extends downward and is fixedly connected to a cross plate, and the cross plate is fixedly connected to the top plate.

[0012] Further, through holes for the oil pipes to pass through are provided on both of the two support plates.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model is a special tooling for testing the steering durability fatigue of a three-point steering axle. After fixing the three-point steering axle on the test stand, the pressing mechanism is used to drive the three-point steering axle to move downward, keeping the lower edge of the steering wheel in contact with the test platform. The steering wheel is driven to perform reciprocating left and right steering by the pumped hydraulic oil, and the durability fatigue situation during the steering of the three-point steering axle can be tested in the laboratory without the need to install the vehicle for testing, which is convenient to operate, shortens the test cycle, and is beneficial to ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] See Figure 1, A steering durability fatigue test tooling for a three-point steering axle, which includes a three-point steering axle 1 and support seats 2 fixed on both sides of the test platform 5. A liftable test frame 3 is installed between the support seats 2 on both sides. The slewing bearing seat 11 of the three-point steering axle 1 is fixedly installed on the test frame 3. The oil port 12 of the three-point steering axle 1 is connected to an oil pipe (not shown in the figure) for driving the three-point steering axle 1 to steer. There is a downward pressing mechanism 4 above the test frame 3 for driving the test frame 3 to lift and lower. The three-point steering axle 1 descends with the test frame 3, and the lower edge of the steering wheel 13 of the three-point steering axle 1 abuts against the test platform 5.

[0018] In the present utility model, each support seat 2 includes a base 21 and a connecting plate 22 fixed on the base 21. A guiding column 6 extending upward is fixedly installed on the connecting plate 22.

[0019] In the present utility model, the test frame 3 includes a bottom plate 31, two support plates 32 and a top plate 33. The two ends of the bottom plate 31 are respectively slidably sleeved on the guiding columns 6 on both sides. The two support plates 32 are respectively fixedly connected to both sides of the bottom plate 31. The top plate 33 is fixedly connected to the tops of the two support plates 32.

[0020] In the present utility model, there is a notch on the front side of the bottom plate 31. Through holes (not shown in the figure) are provided on both sides of the notch on the bottom plate 31. Bolts 7 pass through the through holes on the slewing bearing seat 11 of the three-point steering axle 1 and the through holes from top to bottom and extend out. A locking nut 8 is screwed on the extending end of the bolt 7.

[0021] Thus, by tightening the locking nut 8 so that it abuts against the bottom surface of the bottom plate 31, and the nut end of the bolt 7 abuts against the top surface of the slewing bearing seat 11 of the three-point steering axle 1, the slewing bearing seat 11 of the three-point steering axle 1 is fixedly installed on the bottom plate 31.

[0022] In the present utility model, the downward pressing mechanism 4 includes an oil cylinder 41. The piston rod of the oil cylinder 41 extends downward and is fixedly connected to a cross plate 42. The cross plate 42 is fixedly connected to the top plate 33.

[0023] Thus, by the telescopic movement of the piston rod of the oil cylinder 41, the bottom plate 31 is driven to lift and lower along the guiding columns 6 on both sides, so as to drive the test frame 3 to lift and lower.

[0024] In the present utility model, through holes for the oil pipe to pass through are provided on both support plates.

[0025] The following further explains the present utility model with reference to the accompanying drawings:

[0026] During use, first fix the three-point steering axle 1 to the test frame 3.

[0027] Specifically, pass the main body part of the three-point steering axle 1 through the notch on the front side of the bottom plate 31, so that the through holes on the slewing bearing seat 11 of the three-point steering axle 1 correspond to the through holes on the bottom plate 31 one by one. Then, pass the bolts 7 through the corresponding through holes from top to bottom and extend out, and screw and lock the nuts 8 on the extended ends of the bolts 7.

[0028] Next, tighten the lock nut 8 so that it abuts against the bottom surface of the bottom plate 31, and make the nut end of the bolt 7 abut against the top surface of the slewing bearing seat 11 of the three-point steering axle 1, realizing the fixed installation of the slewing bearing seat 11 of the three-point steering axle 1 on the bottom plate 31, and completing the fixation of the three-point steering axle 1 to the test stand 3.

[0029] Then, connect the oil pipe to the oil port 12 of the three-point steering axle 1. Next, extend the piston rod of the oil cylinder 41 to drive the test stand 3 to move downward, driving the three-point steering axle 1 to move downward until the lower edge of the steering wheel 13 of the three-point steering axle 1 abuts against the test platform 5.

[0030] Then, start the oil pump connected to the oil pipe to work. The pumped hydraulic oil pushes the piston rod body of the three-point steering axle 1 to move, and then drives the support gear shaft of the three-point steering axle 1 to rotate. Since the steering wheel 13 is matched with the support gear shaft through the steering wheel shaft and the positioning pin, the steering wheel 13 realizes steering as the support gear shaft rotates. During this process, observe and record the steering durability fatigue condition of the three-point steering axle 1.

[0031] Although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0032] Therefore, the above description is only a preferred embodiment of the present application, and is not used to limit the scope of implementation of the present application; that is, all equivalent transformations made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A three-point steering bridge steering endurance fatigue test tool, comprising a three-point steering bridge and support seats fixed on both sides of a test platform, characterized in that: A test frame that can be raised and lowered is installed between the support seats on both sides, the slewing bearing seat of the three-point steering axle is fixedly installed on the test frame, the oil port of the three-point steering axle is connected with an oil pipe for driving the three-point steering axle to steer, and a downward pressure mechanism is provided above the test frame for driving the test frame to rise and fall, the three-point steering axle descends with the test frame, and the lower edge of the steering wheel of the three-point steering axle abuts against the test platform.

2. The three-point steering bridge steering endurance fatigue test tool according to claim 1, characterized in that: Each support seat includes a base and a connecting plate fixed on the base, and a guide column extending upward is fixedly mounted on the connecting plate.

3. The three-point steering bridge steering endurance fatigue test tool according to claim 2, characterized in that: The test frame includes a bottom plate, two support plates and a top plate. The two ends of the bottom plate are respectively slidably mounted on the guide columns on both sides. The two support plates are respectively fixedly connected to the two sides of the bottom plate, and the top plate is fixedly connected to the top ends of the two support plates.

4. The three-point steering bridge steering endurance fatigue test tool according to claim 3, characterized in that: A notch is provided on the front side of the base plate, and through holes are provided on both sides of the notch. Bolts pass through the through holes on the slewing bearing seat of the three-point steering bridge and the through holes from top to bottom and extend out. A locking nut is screwed on the extended end of the bolt. The locking nut is tightened to abut against the bottom surface of the base plate, so that the slewing bearing seat of the three-point steering bridge is fixedly installed on the base plate.

5. The three-point steering bridge steering endurance fatigue test tool according to claim 3, characterized in that: The pressing mechanism comprises an oil cylinder, a piston rod of which extends downward and is fixedly connected with a transverse plate, and the transverse plate is fixedly connected with the top plate.

6. The three-point steering bridge steering endurance fatigue test tool according to claim 3, characterized in that: The two support plates are both provided with through holes for the oil pipe to pass through.

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