A multifunctional test fixture for a forklift truck steering axle

Abstract

The application discloses a multifunctional test tool for a forklift steering axle body, which comprises a first supporting mechanism arranged above the steering axle and used for connecting the middle part of the steering axle, a second supporting mechanism arranged at the two axle ends of the steering axle and used for connecting the two ends of the steering axle; wherein the first supporting mechanism comprises a vertical frame and a force distribution frame which is in sliding connection with the vertical frame in the up-down direction; the upper end surface of the force distribution frame is in sliding connection with a bearing seat, and the bottom end surface of the force distribution frame is provided with a clamping mechanism; the second supporting mechanism comprises a bottom plate, the bottom plate is provided with a track, one end of the track is pivotally connected with the bottom plate, and the other end of the track can swing freely along the plane where the bottom plate is located; the upper end surface of the track is connected with a connecting seat which is used for connecting the end part of the steering axle. The test tool for the steering axle body can be applied to the vertical bending stiffness, strength and fatigue endurance test of the steering axle body of various tonnages and various models of forklifts in any steering state, and is simple in installation and maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forklift steering axle test, in particular to a multifunctional test tool for forklift steering axle body. BACKGROUND

[0002] The steering axle body is the main load-bearing structure of the forklift, which is connected with the frame and wheels, and thus bears the force from the frame and wheels during the operation of the forklift. Currently, the manufacturers of the forklift steering axle body usually investigate the vertical bending stiffness, strength and fatigue durability of the steering axle body under the conditions of zero steering, maximum left steering and maximum right steering.

[0003] The prior art discloses a test tool for forklift steering axle body, and the application number is CN105136564B. However, the test tool has the following disadvantages:

[0004] 1) The test tool cannot be used to install the steering axle body alone, and the steering axle body needs to be pre-installed with parts such as steering knuckles and steering cylinders during the test.

[0005] 2) The test tool is only suitable for the test of the steering axle body under the condition of zero steering, and it is difficult to arrange the test tool under the condition of non-zero steering, and the test tool is easy to deviate during the test, and even the steering axle body is separated from the test tool. SUMMARY

[0006] The present application aims to provide a multifunctional test tool for forklift steering axle body to solve the problems in the background art. The first support mechanism is used to simulate the force of the frame on the steering axle body, the second support mechanism is used to simulate the force of the left and right wheels on the steering axle, the swing angle of the track can be adjusted to adapt to the test of the steering axle under any steering condition, and the connecting seat and the force bearing seat are used to adapt to the test of different wheelbase, different steering shaft installation distance and different load center position.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] A multifunctional test tool for forklift steering axle body, comprising a first support mechanism arranged above the steering axle and used to connect the middle part of the steering axle, and a second support mechanism arranged at the two shaft ends of the steering axle and used to connect the two ends of the steering axle.

[0009] The first support mechanism comprises a vertical frame and a force component frame which is connected with the vertical frame in a sliding manner, the upper end surface of the force component frame is connected with a force bearing seat in a sliding manner, and the bottom end surface of the force component frame is provided with a clamping mechanism.

[0010] The second supporting mechanism comprises a bottom plate, wherein an orbit is arranged on the bottom plate, one end of the orbit is pivotally connected with the bottom plate, and the other end of the orbit can swing freely along the plane of the bottom plate; and a connecting seat for connecting the end of the steering bridge is connected to the upper end surface of the orbit.

[0011] As a further scheme of the present application, the connecting seat comprises a wheel frame arranged on the orbit, a pin shaft seat horizontally and slidingly connected to the top end of the wheel frame, a bridge end pin shaft connected to one end of the pin shaft seat, and a bridge end shaft sleeve coaxially arranged on the outer periphery of the bridge end pin shaft; the axial direction of the bridge end pin shaft is perpendicular to the plane of the bottom plate.

[0012] As a further scheme of the present application, an arc-shaped scale groove is arranged on the upper end surface of the bottom plate, the swinging end of the orbit is connected with a first bolt, and the first bolt is arranged in the arc-shaped scale groove and is slidingly connected with the arc-shaped scale groove.

[0013] As a further scheme of the present application, the stand is provided with a first sliding groove in the height direction of the stand; and a component force pin shaft and a component force sleeve are connected to one end of the component force frame, and the two ends of the component force pin shaft are arranged in the first sliding groove and are slidingly connected with the first sliding groove.

[0014] As a further scheme of the present application, a second sliding groove is arranged in the length direction of the component force frame; and a second bolt is connected to the two sides of the force bearing seat, and the second bolt penetrates the second sliding groove and is slidingly connected with the second sliding groove.

[0015] As a further scheme of the present application, the clamping mechanism comprises two rotating shaft seat frames arranged at intervals in the length direction of the component force frame; and the rotating shaft seat frame comprises a seat frame body and a bridge rotating shaft seat connected to the lower side of the seat frame body.

[0016] As a further scheme of the present application, a third sliding groove is arranged in the length direction of the component force frame, a third bolt is connected to the top end of the seat frame body, and the third bolt penetrates the third sliding groove and is slidingly connected with the third sliding groove.

[0017] As a further scheme of the present application, the swinging end of the orbit is formed into a pointed end structure; and a handle part is fixedly arranged on the upper end surface of the orbit close to the swinging end of the orbit.

[0018] As a further scheme of the present application, the arc-shaped scale groove is semicircular.

[0019] As a further scheme of the present application, a fourth sliding groove is arranged in the length direction of the orbit, a fourth bolt penetrates the fourth sliding groove, and the end of the fourth bolt penetrates the top end of the wheel frame.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The application simulates the force of the frame to the axle body of the steering axle through the first supporting mechanism, simulates the force of the left and right wheels to the axle through the second supporting mechanism, and can be adjusted according to the test situation of the steering axle in any steering state through the swing angle of the track, and can be used for the test situation of different wheelbase, different installation distance of the rotating shaft and different load center position through the connecting seat and the force bearing seat.

[0022] In the test installation, the front and rear rotating shafts of the steering axle are respectively installed on the axle rotating shaft seats of the force splitter, and the left and right second supporting mechanisms are respectively installed on the steering knuckle mounting seats at the left and right ends of the steering axle through the axle end pin shaft and the axle end shaft sleeve; in the test, the bridge load force is applied to the force bearing seat, the first supporting mechanism can simulate the force of the frame to the axle body of the steering axle, and the second supporting mechanism can also simulate the counterforce of the left and right wheels to the axle body of the steering axle. The installation angle of the track and the installation position of the wheel frame on the track can be adjusted according to the test situation of the steering axle in any steering state and in different wheelbase, and the installation position of the rotating shaft seat frame and the force bearing seat can be adjusted according to the test situation of different rotating shaft installation distance and different load center. The steering knuckle and the steering oil cylinder are not required to be additionally installed in the test, and the axle end pin shaft is directly connected with the steering axle mounting seat. The vertical bending stiffness, strength and fatigue durability test of the steering axle body of the forklift in any steering state can be carried out, and the installation and maintenance are simple. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the application;

[0024] Figure 2 It is a schematic diagram of the second supporting mechanism in the application;

[0025] Figure 3 It is a structural schematic diagram of the track in the second supporting mechanism;

[0026] Figure 4 It is a structural schematic diagram of the bottom plate in the second supporting mechanism;

[0027] Figure 5 It is a structural schematic diagram of the first supporting mechanism in the application;

[0028] Figure 6 It is an implementation schematic diagram of example 1 in the application;

[0029] Figure 7 It is an implementation schematic diagram of example 2 in the application;

[0030] In the figure:

[0031] 1- steering axle,

[0032] 2 - first support mechanism, 21 - stand, 211 - first sliding slot, 22 - force frame, 221 - force pin shaft, 222 - force shaft sleeve, 223 - second sliding slot, 224 - third sliding slot, 23 - force bearing seat, 231 - second bolt, 24 - clamping mechanism, 241 - rotating shaft seat frame, 2411 - seat frame body, 2412 - bridge rotating shaft seat, 242 - third bolt,

[0033] 3 - second support mechanism, 31 - bottom plate, 311 - arc-shaped scale groove, 312 - limiting rotating hole, 32 - track, 321 - sharp end structure, 322 - handle part, 323 - track rotating shaft, 324 - first bolt, 33 - connecting seat, 331 - wheel frame, 332 - bridge end pin shaft, 333 - bridge end shaft sleeve, 334 - pin shaft seat, 3341 - fourth sliding slot, 3342 - fourth bolt. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected or integrally connected; it can be mechanically connected, or it can be communicatively connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Please refer to Figures 1-7The utility model discaments a test tool of the bridge body of the steering axle of the multifunctional fork truck, which comprises a first supporting mechanism 2 arranged above the steering axle 1 and used for connecting the middle part of the steering axle 1, a second supporting mechanism 3 arranged at the two axle ends of the steering axle 1 and used for connecting the two ends of the steering axle 1; the first supporting mechanism 2 simulates the force of the vehicle frame on the steering axle 1, and the second supporting mechanism 3 simulates the force of the left and right wheels on the steering axle 1.

[0038] The first supporting mechanism 2 comprises a vertical support 21 and a force component support 22 which is connected to the vertical support 21 in a sliding manner. The bottom of the vertical support 21 is fixed on the ground groove. The upper end surface of the force component support 22 is connected to a force bearing seat 23 in a sliding manner, and the bottom end surface is provided with a clamping mechanism 24. The vertical support 21 is provided with a first sliding groove 211 in the height direction. The force component support 22 is connected to a force component pin shaft 221 and a force component shaft sleeve 222 at one end. The two ends of the force component pin shaft 221 are arranged in the first sliding groove 211 in a sliding manner. By adjusting the displacement of the force component pin shaft 221 in the first sliding groove 211, the height of the force component support 22 can be adjusted, and the force component shaft sleeve 222 is pre-tightened to adapt to steering axles of different sizes.

[0039] Further, the force component support 22 is provided with a second sliding groove 223 in the length direction. The two sides of the force bearing seat 23 are connected to second bolts 231 which are arranged in the second sliding groove 223 in a sliding manner. By adjusting the position of the force bearing seat 23 in the second sliding groove 223 and pre-tightening the second bolts 231, the center position of the load on the steering axle 1 can be changed.

[0040] Further, the clamping mechanism 24 comprises two rotating shaft seat frames 241 which are arranged in the length direction of the force component support 22 in a spaced manner. The rotating shaft seat frame 241 comprises a seat body 2411 and a bridge rotating shaft seat 2412 which is connected below the seat body 2411. The force component support 22 is provided with a third sliding groove 224 in the length direction. The top end of the seat body 2411 is provided with a third bolt 242 which is arranged in the third sliding groove 224 in a sliding manner. By pre-tightening the third bolt 242, the relative position of the two rotating shaft seat frames 241 can be adjusted, and the installation distance of the rotating shafts can be adjusted to adapt to different test conditions.

[0041] Further, the second supporting mechanism 3 comprises a bottom plate 31 which is fixed on the ground groove. The bottom plate 31 is provided with a track 32 which is pivotally connected to the bottom plate 31 at one end and can swing freely along the plane of the bottom plate 31 at the other end. The upper end surface of the track 32 is connected to a connecting seat 33 which is used for connecting the end of the steering axle 1. By adjusting the swing angle of the track 32, the connecting seat 33 is deflected to simulate the force of the left and right wheels on the steering axle in different directions, thereby simulating the test conditions of the steering axle in various steering states.

[0042] Further, the connecting seat 33 comprises a wheel frame 331 clamped on the track 32, a pin shaft seat 334 horizontally and slidingly connected at the top end of the wheel frame 331, a bridge end pin shaft 332 connected at one end of the pin shaft seat 334, and a bridge end shaft sleeve 333 coaxially sleeved on the outer periphery of the bridge end pin shaft 332. The axial direction of the bridge end pin shaft 332 is perpendicular to the plane where the bottom plate 31 is located. The bottom of the wheel frame 331 is connected with two symmetrical wheels, the cross section of the track 32 is trapezoidal, the two wheels are clamped on the top end surface of the track 32, and due to the gravity of the steering bridge 1, the wheel frame 331 is pressed on the top surface of the track 32, and the wheel frame 331 is deflected by the swing of the track 32, so that the direction of the force acting on the two ends of the steering bridge 1 changes. The bridge end pin shaft 332 is connected with the steering knuckle mounting seat at the two ends of the steering bridge.

[0043] Further, the pin shaft seat 334 is provided with a fourth sliding groove 3341 along the length direction of the track 32, a fourth bolt 3342 penetrates through the fourth sliding groove 3341, and the tail end of the fourth bolt 3342 penetrates through the top end of the wheel frame 331. By adjusting the relative position of the fourth bolt 3342 in the fourth sliding groove 3341, the wheel frame 331 can freely roll along the length direction of the track 32, so as to realize the installation requirement of different steering bridge wheel spacing.

[0044] Further, an arc-shaped scale groove 311 is formed on the upper end surface of the bottom plate 31, the arc-shaped scale groove 311 is semicircular, a limiting rotation hole 312 is formed at the center of the semicircle, the tail end of the track 32 is provided with a track rotation shaft 323, the track rotation shaft 323 is inserted into the limiting rotation hole 312, and the two are connected in clearance fit, so that the track 32 can freely rotate. The swing end of the track 32 is provided with a first bolt 324, the first bolt 324 is accommodated in the arc-shaped scale groove 311 and the two are slidingly connected, and the swing end of the track 32 is fixed to the bottom plate 31 by pre-tightening the first bolt 324. The swing end of the track 32 forms a pointed structure 321, and a handle portion 322 is fixedly arranged on the upper end surface of the track 32 close to the swing end of the track 32. The tester deflects the swing end of the track 32 by rotating the handle portion 322, and the scale size pointed by the pointed structure 321 can directly record the swing angle.

[0045] In the test installation, first, the middle part of the steering bridge 1 is installed on the clamping mechanism 24, and then the steering knuckle mounting seat at the two ends of the steering bridge 1 is connected with the bridge rotation pin shaft 332. The track rotation shaft 323 is installed on the limiting rotation hole 312, the pointed structure 321 is rotated to point to the preset rotation angle scale, and then the swing end of the track 32 is fixedly connected with the bottom plate 31 through the first bolt 324, so that the installation process before the test is completed.

[0046] Example 1

[0047] Please continue to see Figure 6, a certain type of 7 tons of steering axle body in the zero steering state of the bridge test, the installation wheel track is 1500mm, the bridge shaft seat installation distance is 480mm, the load center is the installation center of the front and rear axle shaft seat, and the load is 3*5600kg.

[0048] Example 2

[0049] Please continue to refer to Figure 7 , a certain type of 7 tons of steering axle body in the maximum right steering state of the bridge test, the installation wheel track is 1500mm, the bridge shaft seat installation distance is 480mm, the left rail clockwise rotation angle is 50°, the right rail clockwise rotation angle is 79°, the load center is the installation center of the front and rear axle shaft seat, and the load is 3*5600kg.

[0050] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0051] Therefore, the above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the present application; that is, various equivalent transformations made within the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A test fixture for a multi-functional fork lift truck steering axle bridge, characterized by, The application relates to a support mechanism for a steering axle (1), which comprises a first support mechanism (2) arranged above the steering axle (1) and used for connecting the middle part of the steering axle (1), and a second support mechanism (3) arranged at the two axle ends of the steering axle (1) and used for connecting the two ends of the steering axle (1). The first support mechanism (2) comprises a vertical support (21) and a force distribution support (22) which is slidably connected to the vertical support (21) in the up-down direction; the upper end surface of the force distribution support (22) is slidably connected to a force bearing seat (23), and the bottom end surface of the force distribution support (22) is provided with a clamping mechanism (24). The second support mechanism (3) comprises a bottom plate (31), wherein an orbit (32) is arranged on the bottom plate (31), one end of the orbit (32) is pivotally connected to the bottom plate (31), and the other end of the orbit (32) can freely swing along the plane of the bottom plate (31); the upper end surface of the orbit (32) is connected to a connecting seat (33) which is used for connecting the end of the steering axle (1). The connecting seat (33) comprises a wheel frame (331) which is clamped on the orbit (32), a pin shaft seat (334) which is horizontally and slidably connected to the top end of the wheel frame (331), a bridge end pin shaft (332) which is connected to one end of the pin shaft seat (334), and a bridge end shaft sleeve (333) which is coaxially sleeved on the outer periphery of the bridge end pin shaft (332); the axial direction of the bridge end pin shaft (332) is perpendicular to the plane of the bottom plate (31). The vertical support (21) is provided with a first sliding groove (211) in the height direction of the vertical support (21); one end of the force distribution support (22) is connected to a force distribution pin shaft (221) and a force distribution shaft sleeve (222), and the two ends of the force distribution pin shaft (221) pass through the first sliding groove (211) and are slidably connected.

2. The test fixture for a multi-functional fork truck axle bridge body of claim 1, wherein, The upper end surface of the bottom plate (31) is provided with an arc-shaped scale groove (311), the swinging end of the orbit (32) is connected to a first bolt (324), and the first bolt (324) is accommodated in the arc-shaped scale groove (311) and is slidably connected.

3. The test fixture for a multi-functional fork truck axle bridge body of claim 1, wherein, The force distribution support (22) is provided with a second sliding groove (223) in the length direction of the force distribution support (22); the two sides of the force bearing seat (23) are connected to a second bolt (231), and the second bolt (231) penetrates through the second sliding groove (223) and is slidably connected.

4. The test fixture for a multi-functional fork truck axle bridge body of claim 1, wherein, The clamping mechanism (24) comprises two rotating shaft seat frames (241) which are arranged at intervals in the length direction of the force distribution support (22); the rotating shaft seat frame (241) comprises a seat frame body (2411) and a bridge rotating shaft seat (2412) which is connected below the seat frame body (2411).

5. The test fixture for a multi-functional fork lift truck axle body of claim 4, wherein, The force distribution support (22) is provided with a third sliding groove (224) in the length direction of the force distribution support (22); the top end of the seat frame body (2411) is connected to a third bolt (242), and the third bolt (242) penetrates through the third sliding groove (224) and is slidably connected.

6. The test fixture for a multi-functional fork truck axle bridge body of claim 1, wherein, The swinging end of the orbit (32) forms a pointed end structure (321); a handle part (322) is fixedly arranged on the upper end surface of the orbit (32) which is close to the swinging end of the orbit (32).

7. The test fixture for a multi-functional fork lift truck axle bridge body of claim 2 wherein, The arc-shaped scale groove (311) is semicircular.

8. The test fixture for a multi-functional fork truck axle bridge body of claim 1, wherein, The pin shaft seat (334) is provided with a fourth sliding groove (3341) along the length direction of the track (32), a fourth bolt (3342) penetrates through the fourth sliding groove (3341), and the end of the fourth bolt (3342) penetrates through the top end of the wheel frame (331).

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