Power-assisted steering mechanism

Abstract

The utility model provides a power-assisted steering mechanism. A head cross beam is fixedly installed at the bottom end of the head of a transport vehicle body, wheel carriers are rotationally installed at the two ends of the head cross beam through U-shaped seats, front wheels are installed on the outer walls of the wheel carriers through wheel shafts, steering swing arms are fixed to the outer walls of the wheel carriers, and the ends of the steering swing arms on the two sides are hinged through a connecting rod. The middle part of the connecting rod is hinged to a steering box body, the middle part of the steering box body is hinged to a head cross beam, and a steering power-assisted mechanism is hinged between one end of the tail part of the steering box body and the transport vehicle body; one end of the head of the steering box body is hinged with a steering induction rod through a vertical shaft; the tail end of the steering induction rod is hinged with a traction rod; rear wheels are installed at the bottom end of the tail of the transport vehicle body. According to the mechanism, the power assisting device is arranged on an original steering mechanism, so that in the steering process, manual traction steering is assisted by means of the power assisting device, the steering efficiency is effectively improved, the steering operation difficulty is reduced, and the steering flexibility is improved.

Description

Technical Field

[0001] The utility model belongs to the field of manufacturing of aviation support equipment, and particularly relates to a power-assisted steering mechanism. Background Art

[0002] During the overhaul and maintenance of an aircraft, different overhaul equipment is required, such as a hydraulic pump station. Since the hydraulic pump station is heavy and large in volume, when transporting it to another location, the entire hydraulic pump station is usually carried on a flatbed vehicle body, and then the entire hydraulic pump station is transported by towing the flatbed vehicle, and then conveyed to the location where overhaul is required.

[0003] For the existing flatbed vehicle, the steering of the wheels mainly realizes the steering of the wheels by manually rotating the towing rod. However, due to the large friction between the wheels and the ground and the large weight of the entire vehicle body, manual steering is time-consuming and laborious, and there are inconveniences in the steering operation process. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a power-assisted steering mechanism. By arranging a power-assisted device on the original steering mechanism, it is ensured that during the steering process, the power-assisted device is used to assist manual towing for steering, effectively improving the steering efficiency, reducing the difficulty of the steering operation, and improving the flexibility of steering.

[0005] To achieve the above technical features, the purpose of the utility model is realized as follows: A power-assisted steering mechanism includes a transport vehicle body. A head cross beam is fixedly installed at the bottom end of the head of the transport vehicle body. Both ends of the head cross beam are rotatably installed with wheel brackets through U-shaped seats. A front wheel is installed on the outer wall of the wheel bracket through a wheel axle. A steering swing arm is fixed on the outer wall of the wheel bracket. The ends of the steering swing arms on both sides are hinged through a connecting rod. The middle part of the connecting rod is hinged on a steering box body. The middle part of the steering box body is hinged on the head cross beam. A steering power-assisted mechanism is hinged between the tail end of the steering box body and the transport vehicle body. A steering induction rod is hinged at the head end of the steering box body through a vertical shaft. The end of the steering induction rod is hinged with a towing rod. A rear wheel is installed at the bottom end of the tail of the transport vehicle body.

[0006] The connecting rod is hinged and connected to the steering swing arm through a first pin shaft.

[0007] The middle part of the connecting rod is matched with a kidney-shaped groove on the steering box body through a second pin shaft.

[0008] The steering box body is hinged on the head cross beam through a third pin shaft.

[0009] The steering power-assisted mechanism includes a mounting seat fixed at the bottom end of the transport vehicle body. A power-assisted oil cylinder is hinged on the side wall of the mounting seat through a fourth pin shaft. The end of the piston rod of the power-assisted oil cylinder is connected to the tail of the steering box body through a sixth pin shaft.

[0010] Both the head crossbeam and the rear wheels are respectively and fixedly connected to the bottom end of the transport vehicle body through shock-absorbing frames.

[0011] The steering induction rod cooperates with a first microswitch and a second microswitch installed at the head of the steering box body.

[0012] The towing rod is hinged to the steering induction rod through a fifth pin shaft, and a towing lug is arranged at the top end of the towing rod.

[0013] A rolling bearing is fixedly installed at the top of the steering induction rod. The rolling bearing forms a rolling fit with the bottom end face of the vehicle frame disc, and the vehicle frame disc is fixed at one end of the head of the transport vehicle body.

[0014] The utility model has the following beneficial effects:

[0015] 1. By arranging a boosting device on the original steering mechanism, this mechanism ensures that during the steering process, with the assistance of the boosting device, manual towing for steering is assisted, effectively improving the steering efficiency, reducing the difficulty of steering operations, and enhancing the flexibility of steering.

[0016] 2. Through the above-mentioned hinged connection, it is ensured that during the swinging process of the steering box body, the connecting rod can be synchronously driven to swing within a certain range through the second pin shaft, and then the steering swing arms at both ends of the connecting rod are driven to rotate through the connecting rod, thereby achieving the purpose of steering. By adopting a kidney-shaped groove, the connecting rod can realize forward and backward telescopic movements within a certain range.

[0017] 3. The above-mentioned steering boosting mechanism can be used to provide steering power.

[0018] 4. The above-mentioned shock-absorbing frame can play a certain shock-absorbing effect on the transport vehicle body.

[0019] 5. The above-mentioned first microswitch and second microswitch can be used to sense the rotation of the steering induction rod, thereby facilitating the identification of the steering direction. When it is recognized that steering is required, the steering boosting mechanism will be controlled to start, and then assisted steering will be carried out through the steering boosting mechanism. Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0021] Figure 1 It is a three-dimensional view of the first perspective of the present utility model.

[0022] Figure 2 It is a three-dimensional view of the second perspective of the present utility model.

[0023] Figure 3 It is a three-dimensional view of the third perspective of the present utility model.

[0024] Figure 4This is the three-dimensional view of the fourth perspective of the utility model.

[0025] Figure 5 This is the top view of the utility model.

[0026] Figure 6 This is the Figure 5 A-A view in the utility model.

[0027] Figure 7 This is the Figure 6 partial view in the utility model.

[0028] In the figure: traction lug 1, traction rod 2, steering induction rod 3, fifth pin shaft 4, frame disc 5, transport vehicle body 6, front wheel 7, rear wheel 8, rolling bearing 9, first micro switch 10, second micro switch 11, vertical shaft 12, steering box body 13, shock absorber frame 14, U-shaped seat 15, wheel carrier 16, booster oil cylinder 17, wheel axle 18, steering swing arm 19, first pin shaft 20, connecting rod 21, second pin shaft 22, third pin shaft 23, kidney-shaped groove 24, head cross beam 25, sixth pin shaft 26, piston rod 27, fourth pin shaft 28, mounting seat 29. Specific embodiments

[0029] The following further describes the embodiments of the utility model with reference to the accompanying drawings.

[0030] Embodiment 1:

[0031] See Figures 1-7, A power steering mechanism, including a transport vehicle body 6. At the bottom end of the head of the transport vehicle body 6, a head cross beam 25 is fixedly installed. At both ends of the head cross beam 25, a wheel carrier 16 is rotatably installed through a U-shaped seat 15. On the outer wall of the wheel carrier 16, a front wheel 7 is installed through a wheel axle 18. A steering swing arm 19 is fixed on the outer wall of the wheel carrier 16, and the ends of the steering swing arms 19 on both sides are hinged through a connecting rod 21; the middle part of the connecting rod 21 is hinged to a steering box body 13, the middle part of the steering box body 13 is hinged to the head cross beam 25, and a steering assist mechanism is hinged between the tail end of the steering box body 13 and the transport vehicle body 6; at the head end of the steering box body 13, a steering induction rod 3 is hinged through a vertical shaft 12, and a traction rod 2 is hinged to the end of the steering induction rod 3; at the bottom end of the tail of the transport vehicle body 6, a rear wheel 8 is installed. This mechanism sets a power assist device on the original steering mechanism, thereby ensuring that during the steering process, with the assistance of the power assist device to assist manual traction for steering, effectively improving the steering efficiency, reducing the difficulty of the steering operation, and improving the flexibility of steering. During the specific use process, by manually dragging the traction rod 2, the steering induction rod 3 is driven through the traction rod 2. When it is sensed by the steering induction rod 3 that steering is required, the steering assist mechanism will be automatically controlled. The steering box body 13 is pushed through the steering assist mechanism, the connecting rod 21 is synchronously driven through the steering box body 13, the steering swing arms 19 at both ends are driven through the connecting rod 21, and then the corresponding front wheels 7 are driven to steer through the steering swing arms 19, achieving the purpose of power-assisted steering.

[0032] Further, the connecting rod 21 is hinged to the steering swing arm 19 through a first pin shaft 20. Through the above-mentioned hinged connection, it is ensured that the connecting rod 21 can drive the steering swing arm 19, and then drive the wheel carrier 16 through the steering swing arm 19, and drive the front wheel 7 to steer through the wheel carrier 16.

[0033] Further, the middle part of the connecting rod 21 is matched with a kidney-shaped groove 24 on the steering box body 13 through a second pin shaft 22. Through the above-mentioned hinged connection, it is ensured that during the swinging process of the steering box body 13, the connecting rod 21 can be synchronously driven to swing within a certain range through the second pin shaft 22, and then drive the steering swing arms 19 at both ends of the connecting rod 21 to rotate, thereby achieving the purpose of steering. By adopting the kidney-shaped groove 24, it is ensured that the connecting rod 21 can perform telescopic actions back and forth within a certain range.

[0034] Further, the steering box body 13 is hinged to the head cross beam 25 through a third pin shaft 23. Through the above-mentioned hinged manner, it is ensured that the steering box body 13 can rotate around the third pin shaft 23.

[0035] Further, the steering assist mechanism includes a mounting seat 29 fixed to the bottom end of the transport vehicle body 6. A power assist cylinder 17 is hinged to the side wall of the mounting seat 29 through a fourth pin shaft 28. The end of the piston rod 27 of the power assist cylinder 17 is connected to the tail of the steering box body 13 through a sixth pin shaft 26. The above-mentioned steering assist mechanism can be used to provide steering power. During the working process, when it is sensed that steering is required, the power assist cylinder 17 is started. The piston rod 27 is driven by the power assist cylinder 17, and the steering box body 13 is driven to rotate by the piston rod 27, thereby achieving the purpose of steering.

[0036] Further, both the head cross beam 25 and the rear wheels 8 are respectively fixedly connected to the bottom end of the transport vehicle body 6 through shock-absorbing frames 14. The above-mentioned shock-absorbing frames 14 can play a certain shock-absorbing effect on the transport vehicle body.

[0037] Further, the steering induction rod 3 cooperates with a first micro switch 10 and a second micro switch 11 installed at the head of the steering box body 13. The above-mentioned first micro switch 10 and second micro switch 11 can be used to sense the rotation of the steering induction rod 3, thereby facilitating the identification of the steering direction. When it is recognized that steering is required, the steering assist mechanism will be controlled to start, and then power-assisted steering will be performed through the steering assist mechanism.

[0038] Further, the towing bar 2 is hinged to the steering induction rod 3 through a fifth pin shaft 4, and a towing ear 1 is arranged at the top end of the towing bar 2. The above-mentioned towing bar 2 facilitates the connection with the towing vehicle, thereby transporting the entire transport vehicle body.

[0039] Further, a rolling bearing 9 is fixedly installed at the top of the steering induction rod 3. The rolling bearing 9 forms a rolling fit with the bottom end face of the vehicle frame disc 5, and the vehicle frame disc 5 is fixed to one end of the head of the transport vehicle body 6. The above-mentioned rolling bearing 9 ensures that it can be in contact with the bottom end of the vehicle frame disc 5, thereby realizing the support and limit of the steering induction rod 3.

[0040] The specific working process and principle of the present utility model:

[0041] When it is necessary to tow and move the entire transport vehicle body, the towing bar 2 is towed. The steering induction rod 3 is driven by the towing bar 2. When the steering induction rod 3 cooperates with the first micro switch 10 and the second micro switch 11 and senses the rotation of the steering induction rod 3, the steering assist mechanism will be automatically controlled. The power assist cylinder 17 is started, the piston rod 27 is driven by the power assist cylinder 17, the steering box body 13 is driven to rotate by the piston rod 27, the connecting rod 21 is synchronously driven by the steering box body 13, the steering swing arms 19 at both ends are driven by the connecting rod 21, and then the corresponding front wheels 7 are driven to steer by the steering swing arms 19, achieving the purpose of power-assisted steering.

Claims

1. A power steering mechanism, characterized in that: The invention comprises a transport vehicle body (6), a head cross beam (25) is fixedly mounted on the bottom end of the head of the transport vehicle body (6), a wheel frame (16) is rotatably mounted on both ends of the head cross beam (25) via a U-shaped seat (15), a front wheel (7) is mounted on the outer wall of the wheel frame (16) via a wheel axle (18), a steering swing arm (19) is fixed on the outer wall of the wheel frame (16), and the ends of the steering swing arms (19) on both sides are hinged via a connecting rod (21); the middle of the connecting rod (21) is The middle part of the steering box (13) is hinged on the steering box body (13), the middle part of the steering box body (13) is hinged on the head cross beam (25), and a steering assist mechanism is hinged between the rear end of the steering box body (13) and the transport vehicle body (6); a steering sensing rod (3) is hinged at the head end of the steering box body (13) through a vertical shaft (12), and a traction rod (2) is hinged at the end of the steering sensing rod (3); and a rear wheel (8) is installed at the bottom end of the rear end of the transport vehicle body (6).

2. A power steering mechanism according to claim 1, characterized in that: The connecting rod (21) is hingedly connected to the steering swing arm (19) via a first pin shaft (20).

3. A power steering mechanism according to claim 1, characterized in that: The middle portion of the connecting rod (21) is matched with the waist-shaped groove (24) on the steering box body (13) through the second pin shaft (22).

4. A power steering mechanism according to claim 1, characterized in that: The steering box body (13) is hinged to the head cross beam (25) via a third pin shaft (23).

5. The power steering mechanism according to claim 1, characterized in that: The steering assist mechanism comprises a mounting seat (29) fixed to the bottom end of the transport vehicle body (6); a power assist oil cylinder (17) is hingedly connected to the side wall of the mounting seat (29) via a fourth pin shaft (28); and the end of the piston rod (27) of the power assist oil cylinder (17) is connected to the rear end of the steering box body (13) via a sixth pin shaft (26).

6. The power steering mechanism according to claim 1, characterized in that: The head cross beam (25) and the rear wheel (8) are fixedly connected to the bottom end of the transport vehicle body (6) via a vibration damping frame (14).

7. The power steering mechanism according to claim 1, characterized in that: The steering sensing rod (3) cooperates with a first micro switch (10) and a second micro switch (11) mounted on the head of the steering box body (13).

8. The power steering mechanism according to claim 1, characterized in that: The traction rod (2) is hingedly connected to the steering sensing rod (3) via a fifth pin shaft (4), and a traction lug (1) is provided at the top end of the traction rod (2).

9. A power steering mechanism according to claim 8, characterized in that: A rolling bearing (9) is fixedly mounted on the top of the steering sensing rod (3), and the rolling bearing (9) forms a rolling fit with the bottom end surface of the frame disc (5), and the frame disc (5) is fixed to one end of the head of the transport vehicle body (6).

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