Balanced weight steering axle with integral structure and fork truck

Abstract

The application discloses a balanced heavy type steering axle with an integrated structure, which comprises a balanced heavy body and a steering axle body, the steering axle body comprises a steering oil cylinder, both piston ends of the steering oil cylinder are connected with steering knuckles through bearings respectively, the steering knuckles are movably connected with one end of a steering fork through a steering kingpin, the other end of the steering fork is movably connected with the balanced heavy body, and the middle part of the steering fork is connected with the balanced heavy body through a damping spring. The application also discloses a forklift with the balanced heavy type steering axle with the integrated structure. In the application, the balanced heavy body and the steering axle body are connected into an integrated structure through an oil cylinder fixing plate and a steering fork, and are simple to install; the steering fork is connected with the balanced heavy body through a damping spring respectively, when the road surface is uneven, left and right wheels are damped through respective damping springs, so that the damping mechanisms of the left and right wheels are completely same and independent of each other, and independent damping of the left and right wheels is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forklifts, in particular to a balanced weight type steering axle with an integrated structure of balanced weight and steering axle functions. BACKGROUND

[0002] In a balanced weight type forklift, the steering axle and the balanced weight are generally two components, which are respectively manufactured and then installed on the forklift frame.

[0003] In addition, the left and right wheels of the forklift are installed on the axle body of the steering axle, and the axle body is connected with the frame by using elastic units to achieve overall shock absorption. That is, the left and right wheels simultaneously achieve shock absorption, and when turning, if one side of the road surface is uneven, the overall shock absorption is caused, resulting in poor shock absorption effect. How to achieve independent shock absorption of the left and right wheels is the main means to improve the shock absorption effect. SUMMARY

[0004] The purpose of the present application is to provide a balanced weight type steering axle with an integrated structure, which reduces the installation process and can achieve independent shock absorption of the left and right wheels.

[0005] The technical scheme of the present application is as follows:

[0006] The balanced weight type steering axle with an integrated structure comprises a balanced weight body and a steering axle body, the steering axle body comprises a steering oil cylinder, both piston ends of the steering oil cylinder are connected with steering knuckles through bearings, the steering knuckles are movably connected with one end of a steering fork through a steering kingpin, the other end of the steering fork is movably connected with the balanced weight body, and the middle part of the steering fork is connected with the balanced weight body through a shock absorbing spring.

[0007] In a further scheme, a horizontal opening groove is formed on one side of the bottom end of the balanced weight body, and two steering forks are symmetrically installed in the groove.

[0008] In a further scheme, a stepped shaft is fixedly installed on the inner side wall of the groove, the stepped shaft is movably connected with the end part of the steering fork, spring mounting seats are symmetrically fixed on the balanced weight body outside both ends of the groove, and spring columns for sleeving the shock absorbing springs are fixed on the spring mounting seats.

[0009] Preferably, a limiting upper boss is fixed on the balanced weight body outside the spring mounting seat to limit the upper end surface of the steering fork, and the upper edge of the bottom end surface of the groove forms a limiting lower boss to limit the lower end surface of the steering fork.

[0010] In a further scheme, a fixing hole is formed in the top side wall of the groove for installing an oil cylinder fixing plate.

[0011] In a further scheme, the steering oil cylinder is fixedly connected with the balanced weight body through the oil cylinder fixing plate.

[0012] In a further aspect, the steering fork comprises a connecting handle and a fork body, the end of the connecting handle is provided with a through hole, and a threaded hole is provided in the middle of the connecting handle; and a pin hole is provided in the fork body.

[0013] In a further aspect, a locking device is installed at the bottom end of the threaded hole.

[0014] Another object of the present application is to provide a forklift truck with the above-mentioned integrated structure of the balance weight type steering axle.

[0015] In the present application, the balance weight body and the steering axle body are connected into an integrated structure through the oil cylinder fixing plate and the steering fork. The structure is simple, and the integrated structure can be installed on the frame, thereby reducing the installation process.

[0016] In the present application, the steering knuckle left, the ball head rod end joint bearing, the steering fork left, the steering oil cylinder, the steering fork right, the ball head rod end joint bearing, and the steering knuckle right form a steering trapezoid required for steering. Under the driving of the left and right extension of the steering oil cylinder, the steering knuckle left and the steering knuckle right rotate around the steering kingpin, thereby achieving the required steering angle of the whole vehicle and realizing the steering function.

[0017] One end of the steering fork is movably connected to the balance weight body through a stepped shaft, and the other end is movably connected to the steering knuckle through a steering kingpin. When the road surface is uneven, the steering fork rotates upward and compresses the shock absorbing spring, which plays a shock absorbing role under the action of the spring force.

[0018] Since the steering fork and the steering knuckle are symmetrical parts, the steering fork is connected to the balance weight body through a shock absorbing spring. When the road surface is uneven, the left and right wheels are respectively shock-absorbed by the respective shock absorbing springs, so that the shock absorbing mechanisms of the left and right wheels are completely the same and independent of each other, thereby realizing independent shock absorption of the left and right wheels.

[0019] When the road surface is uneven, the steering fork rotates upward and compresses the shock absorbing spring. When it rotates upward to a certain angle (generally 2.5-3 degrees), the upper end surface of the steering fork contacts the limiting upper boss of the balance weight body, thereby playing a mechanical limiting role to prevent the angle from being too large. When the balance weight type steering axle is hoisted as a whole, the lower end surface of the steering fork contacts the limiting lower boss of the balance weight body, thereby preventing it from rotating downward and thereby separating the whole. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a structural schematic diagram of the present application;

[0021] Figure 2 The figure is Figure 1 A-A sectional view in the present application;

[0022] Figure 3 The figure is a structural schematic diagram of the balance weight body in the present application;

[0023] Figure 4 This is a schematic diagram of the steering fork in this invention;

[0024] In the diagram: 1. Left steering knuckle; 2. Steering kingpin; 3. Bearing; 4. Left steering fork; 41. Upper end face; 42. Threaded hole; 43. Lower end face; 44. Through hole; 45. Pin hole; 5. Washer; 6. Locking nut; 7. Steering cylinder; 8. Counterweight; 81. Upper limit boss; 82. Spring mounting seat; 83. Stepped shaft; 84. Lower limit boss; 85. Fixing hole; 86. Spring mounting post; 9. Cylinder fixing plate; 10. Shock absorber spring; 11. Locking device; 12. Right steering fork; 13. Right steering knuckle. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0026] Example 1:

[0027] like Figures 1-4 As shown, the integrated counterbalanced steering axle includes a counterbalance body 8 and a steering axle body. The steering axle body includes a steering cylinder 7. The two piston ends of the steering cylinder 7 are respectively connected to the left steering knuckle 1 and the right steering knuckle 13 via a bearing 3. The left steering knuckle 1 is movably connected to one end of the left steering fork 4 via a steering kingpin 2, and the right steering knuckle 13 is movably connected to one end of the right steering fork 12 via a steering kingpin 2. The other ends of the left steering fork 4 and the right steering fork 12 are both movably connected to the counterbalance body 8. The middle parts of the two steering forks are connected to the counterbalance body 8 via shock-absorbing springs 10. That is, the steering axle body has a left-right symmetrical structure. The bearing 3, steering knuckle, steering kingpin 2, and steering fork are all symmetrically connected to the two piston ends of the steering cylinder 7. Specifically, the left steering knuckle 1 and the right steering knuckle 13, and the left steering fork 4 and the right steering fork 12 are left-right symmetrical components.

[0028] In this invention, bearing 3 is selected as a ball joint rod end bearing, such as... Figure 1 , 2 As shown, the steering knuckle left 1, ball joint end bearing, steering fork left 4, steering cylinder 7, steering fork right 12, ball joint end bearing, and steering knuckle right 13 form the steering trapezoid required for steering.

[0029] When the steering cylinder 7 is working, it drives the left steering knuckle 1 or the right steering knuckle 13 to rotate around the steering kingpin 2 through the ball joint end bearing, so that the entire rotation process is smooth and will not produce deviation.

[0030] Further options, such as Figure 3As shown, a horizontally open groove is provided on one side of the bottom end of the counterweight 8, and the two steering forks are symmetrically installed in the groove. A stepped shaft 83 is fixedly installed on the inner side wall of the groove, and the stepped shaft 83 is movably connected to the end of the steering fork; spring mounting seats 82 are symmetrically fixed on the counterweight 8 located on the outer sides of both ends of the groove, and spring posts 86 for passing through the shock-absorbing springs 10 are fixed on the spring mounting seats 82.

[0031] A limiting upper boss 81 is fixed on the counterweight 8 located outside the spring mounting seat 82 to limit the upper end face of the steering fork; the upper edge of the bottom end face of the groove forms a limiting lower boss 84 to limit the lower end face of the steering fork.

[0032] like Figure 4 As shown, the steering fork includes a connecting handle and a fork body. The end of the connecting handle has a through hole 44, and the middle of the connecting handle has a threaded hole 42. The fork body has a pin hole 45.

[0033] During steering fork installation, the through hole 44 at the end of the connecting handle is inserted into the stepped shaft 83 on the counterweight 8, and then the end of the stepped shaft 83 is tightened with a washer 5 and a locking nut 6, allowing the steering fork to rotate around the stepped shaft 83. The shock-absorbing spring 10 is sleeved on the spring post 86, with its top end connected to the spring mounting seat 82. The bottom end of the shock-absorbing spring 10 abuts against the steering fork, and the bottom end of the spring post 86 passes through the shock-absorbing spring 10 and is then inserted into the threaded hole 42 of the connecting handle for fixing with a locking device 11. The locking device 11 includes a bolt threaded into the bottom end of the threaded hole 42 and a nut for locking the bolt externally, with the end of the bolt contacting the spring post 86. Additionally, the steering knuckle is inserted into the steering fork body and connected to the steering knuckle via the steering kingpin 2 passing through the pin hole 45.

[0034] Taking the left wheel structure as an example, let's illustrate how the wheel achieves shock absorption on uneven roads. The bottom of the stepped axle 83 of the counterweight 8 is a smooth axle that mates with the through hole 44 of the left steering fork 4. It is then secured with a washer 5 and a locking nut 6, allowing the left steering fork 4 to rotate around the stepped axle 83. The shock-absorbing spring 10 is connected and installed through the spring mounting seat 82, spring column 86, threaded hole 42 of the left steering fork 4, and locking device 11 of the counterweight 8. Taking a left turn (to the left of the driver's seat) as an example, the left end of the piston of the steering cylinder 7 extends to the left, pushing the left steering knuckle 1 to rotate clockwise around the steering kingpin 2 through the ball joint bearing (viewed from above). At the same time, the right end of the piston of the steering cylinder 7 retracts to the left, driving the right steering knuckle 13 to rotate clockwise around the steering kingpin 2 through the ball joint bearing (viewed from above). At this time, the two rear wheel axles intersect with the front wheel axle at a point on the left side of the vehicle body, which is the instantaneous turning center. The forklift then turns to the left around this turning center.

[0035] When the road is uneven, the left upper end of the steering yoke 4 is turned upward and compresses the shock spring 10, which plays a shock-absorbing role under the action of the spring force. The left and right wheel shock-absorbing mechanisms are completely the same and independent of each other, thereby realizing independent shock-absorbing of the left and right wheels.

[0036] Preferably, a limiting upper boss 81 is fixed on the balance weight 8 outside the spring mounting seat 82, for limiting the upper end surface of the steering yoke; and the upper edge of the bottom end surface of the groove constitutes a limiting lower boss 84 for limiting the lower end surface of the steering yoke.

[0037] When the steering yoke is turned upward to a certain angle (generally 2.5-3 degrees), the upper end surface 41 of the left steering yoke 4 contacts the limiting upper boss 81 of the balance weight 8, playing a mechanical limiting role to prevent the turning angle from being too large. When the balance weight type steering bridge is hoisted as a whole, the lower end surface 43 of the left steering yoke 4 contacts the limiting lower boss 84 of the balance weight 8, preventing it from turning downward and thereby separating the whole.

[0038] In the embodiment, the steering oil cylinder 7 is fixedly connected with the balance weight 8 through the oil cylinder fixing plate 9. The top side wall of the groove is provided with a fixing hole 85 for installing the oil cylinder fixing plate 9. Thus, the steering oil cylinder 7 and the balance weight 8 are connected into one body.

[0039] Embodiment 2:

[0040] Another object of the present application is to provide a forklift truck with the above-mentioned balance weight type steering bridge with the integrated structure. The specific structure of the balance weight type steering bridge is as described in Embodiment 1.

[0041] The above-described embodiments are only preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, any deformation and improvement of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A balanced weight steering axle of unitary construction comprising a balanced weight body (8) and a steering axle body, characterized in that: The steering axle body comprises a steering oil cylinder (7), both piston ends of the steering oil cylinder (7) are connected with steering knuckles through bearings (3) respectively, the steering knuckles are movably connected with one end of a steering yoke through a steering kingpin (2), the other end of the steering yoke is movably connected with a counterweight body (8), and the middle part of the steering yoke is connected with the counterweight body (8) through a damping spring (10); A horizontal opening groove is formed in the bottom end of one side of the counterweight body (8), two steering yokes are symmetrically installed in the groove, a stepped shaft (83) is fixedly installed on the inner side wall of the groove, the stepped shaft (83) is movably connected with the end of the steering yoke, spring mounting seats (82) are symmetrically fixed on the counterweight body (8) outside both ends of the groove, spring columns (86) for sleeving the damping springs (10) are fixed on the spring mounting seats (82); A limiting upper boss (81) is fixed on the counterweight body (8) outside the spring mounting seat (82) and is used for limiting the upper end face of the steering yoke, and the upper edge of the bottom end face of the groove constitutes a limiting lower boss (84) for limiting the lower end face of the steering yoke. The steering oil cylinder (7) is fixedly connected with the counterweight body (8) through an oil cylinder fixing plate (9), the steering yoke comprises a connecting handle and a yoke body, a through hole (44) is formed in the end of the connecting handle, and a threaded hole (42) is formed in the middle of the connecting handle, and a pin hole (45) is formed in the yoke body.

2. The unitized balance weight drive axle of claim 1 wherein: A fixing hole (85) is formed in the top side wall of the groove.

3. The unitized balance weight drive axle of claim 1 wherein: A locking device (11) is installed at the bottom end of the threaded hole (42).

4. A fork lift truck characterised by: The forklift truck has the integral structure of the counterweight type steering axle as claimed in any one of claims 1-3.

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