A locking device for the suspension of an outriggerless aerial work platform.

Abstract

This utility model relates to the field of engineering machinery technology, specifically a locking device for the suspension of an outriggerless aerial work platform vehicle. The technical problem it solves is that traditional aerial work platforms rely on outriggers for support, which is time-consuming and occupies road space, while the lack of a rigid locking function in the suspension leads to insufficient operational stability. The technical solution includes a pin connection assembly, a fastening device, and a pneumatic device. The pin connection assembly connects the torsion bar and the chassis suspension, achieving a rigid connection between the torsion bar and the chassis suspension when locked. The fastening device pre-fixes the torsion bar through a beam connector, and its internal push rod is driven by the pneumatic device to make the torsion bar adhere to or separate from the chassis beam. The pneumatic device is controlled by a controller to symmetrically push the push rod with left and right single-acting cylinders, achieving suspension locking or unlocking. The beneficial effect is that this utility model, by rigidly locking the suspension and beam and replacing traditional outriggers with tires, more conveniently achieves effective support for the aerial work platform vehicle during operation.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a locking device for the suspension of an outriggerless aerial work platform. Background Technology

[0002] When operating a conventional aerial work platform, the first step is to extend and retract the outriggers. Extending the outriggers is not only time-consuming and laborious, but also occupies the road and affects the normal driving of vehicles.

[0003] Aerial work platform vehicle chassis typically consists of four main parts: axles, wheels, frame, and chassis suspension. During vehicle movement, the chassis suspension cushions the impact between the frame and axles. For vehicles specifically designed for aerial work, the chassis suspension needs to be rigidly locked when the chassis is stationary. However, since the chassis suspension is a purely mechanical structure, it does not inherently possess locking capabilities. Therefore, a separate locking device is required to rigidly lock the vehicle's chassis suspension during operation, maintaining the relative stillness of the frame and axles. This allows the tires to function as outriggers while preventing elastic deformation of the suspension during operation. Utility Model Content

[0004] The purpose of this utility model is to overcome the problems in the background technology and provide a locking device for the suspension of a platform truck without outriggers. By rigidly locking the suspension and the main beam, and replacing the traditional outriggers with tires, the platform truck can be more conveniently and effectively supported during operation.

[0005] To achieve the aforementioned utility model objectives, the present utility model adopts the following technical solution: a locking device for the suspension of a platformless aerial work vehicle, comprising a pin connection assembly, a fastening device, and a pneumatic device; the pin connection assembly connects the torsion bar to the chassis suspension, thereby achieving the connection between the torsion bar and the chassis suspension; the fastening device is sleeved on the outside of the torsion bar and fixed to the chassis beam, and a push rod is provided in the fastening device; the pneumatic device is connected to the push rod, and by driving the push rod to slide, the torsion bar is brought into contact with or separated from the chassis beam, thereby achieving the locking or unlocking of the suspension.

[0006] Furthermore, the pin connection assembly includes two pins, a rubber pad, and a connector; one of the pins passes through the connecting holes of the rubber pad, the connector, and the chassis suspension, and is then secured with a nut; the other pin passes through either the rubber pad and the end of the torsion bar, and is then fixed with a nut. The connector and the torsion bar are rotatably connected. This arrangement ensures effective force transmission between the torsion bar and the chassis suspension through the double pin connection, while the rotatable arrangement avoids interference with the normal driving state of the vehicle, ensuring the reliability of the connection and the smoothness of the ride.

[0007] Furthermore, the upper part of the pin is a smooth cylindrical structure, and the lower part is a high-strength threaded structure. The entire pin is galvanized. The smooth cylindrical structure allows the pin to rotate flexibly in the hole, and the high-strength thread, in conjunction with the nut, can achieve a stable fastening and prevent loosening. The overall galvanization effectively improves the pin's resistance to corrosion and extends its service life.

[0008] Furthermore, the fastening device also includes a beam connector. The push rod passes through a pre-drilled hole in the beam connector, and the beam connector wraps around the torsion bar and is fastened to the chassis beam with bolts to pre-fix the torsion bar to one side of the chassis beam. This setting, by pre-fixing the torsion bar with the beam connector, avoids the torsion bar from shaking in the non-locked state, laying a stable foundation for the subsequent push rod to drive the torsion bar to fit tightly against the chassis beam, and improving the accuracy of the locking action.

[0009] Furthermore, the pneumatic device includes a single-acting cylinder, an air pipe, and a controller. The single-acting cylinder is connected to the controller via the air pipe, and the output end of the single-acting cylinder is connected to a push rod. The push rod is driven to slide back and forth along the axial direction by compressed gas, so that the torsion bar is pressed against or separated from the chassis beam, thereby controlling the opening and closing of the suspension locking system. The compressed gas drive provides a rapid response and stable driving force. In conjunction with the controller, it enables convenient control of locking and unlocking the chassis suspension, simplifying the operation process and improving work efficiency.

[0010] Furthermore, the single-acting cylinder includes a left single-acting cylinder and a right single-acting cylinder, both of which are connected to push rods in the fastening device on the same side, and are symmetrically arranged on both sides of the vehicle. The symmetrical arrangement can make the force on both sides of the torsion bar balanced, avoid structural deformation caused by excessive force on one side, and ensure the stability and reliability of the overall structure when the chassis suspension is locked.

[0011] Furthermore, the rubber pad is placed between the pin and the torsion bar, and between the pin and the chassis suspension, to avoid direct contact between the metal structural components, thereby achieving buffering and shock absorption and reducing operating noise. The rubber pad can effectively absorb vibration, reduce wear between metal components, extend the service life of structural components, and reduce noise pollution during locking and unlocking.

[0012] Furthermore, the torsion bar end is provided with multiple holes arranged along the length direction, and the pin in the pin connection assembly can selectively pass through any of the holes to adapt to the connection requirements under different working conditions. By selecting different hole positions for connection, the relative position of the torsion bar and the chassis suspension can be flexibly adjusted, so that the locking device can adapt to the operating requirements of the vehicle under different loads and different road conditions, thereby improving the versatility and adaptability of the device.

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

[0014] Compared with existing technologies, the primary benefit of this invention is a significant improvement in the efficiency and convenience of aerial work. Traditional aerial work platforms require the extension and retraction of outriggers, which is not only time-consuming and labor-intensive but also obstructs traffic. This invention, however, uses a suspension locking system to rigidly lock the suspension and main frame, replacing traditional outriggers with tires, eliminating the outrigger extension and retraction step and reducing preparation time before aerial work. Furthermore, the elimination of outrigger support reduces the vehicle's requirements for terrain; work can be carried out wherever the vehicle can reach, avoiding terrain limitations imposed by outrigger placement and effectively improving operational flexibility.

[0015] Secondly, this invention offers significant advantages in terms of structural optimization and practicality. Traditional spring suspensions lack a locking function, requiring additional complex devices to achieve rigid locking. This invention, however, achieves suspension locking simply and efficiently through the synergistic action of a pin connection assembly, a fastening device, and a pneumatic device. The rubber pad in the pin connection assembly avoids direct metal-to-metal contact, reducing wear and noise; the pneumatic device, driven by compressed gas, offers rapid response and convenient control. Furthermore, this system reduces road occupancy and minimizes traffic disruption in the work area. In emergency scenarios such as fire rescue and power restoration, it can be deployed more quickly, enhancing overall practicality and social value. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the overall installation of this utility model in an aerial work platform. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the overall installation of this utility model in an aerial work platform. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the pin connection component in this utility model.

[0020] Figure 4 This is a schematic diagram of the fastening device in this utility model.

[0021] Figure 5 This is a schematic diagram of the pneumatic device in this utility model.

[0022] The attached figures are labeled as follows: 1. Right single-acting cylinder; 2. Fastening device; 3. Torsion bar; 4. Pin connection assembly; 5. Left single-acting cylinder; 6. Air pipe; 7. Controller; 8. Connector; 9. Rubber pad; 10. Pin; 11. Push rod; 12. Main beam connector; 13. Chassis main beam; 14. Chassis suspension; 15. Pneumatic device. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0024] Example

[0025] like Figures 1-5 As shown, this embodiment provides a locking device for the suspension of an outriggerless aerial work vehicle, including a pin connection assembly 4, a fastening device 2, and a pneumatic device 15;

[0026] The pin connection assembly 4 connects the torsion bar 3 and the chassis suspension 14 respectively, realizing the connection between the torsion bar 3 and the chassis suspension 14; the fastening device 2 is sleeved on the outside of the torsion bar 3 and fixed to the chassis beam 13, and the fastening device 2 is provided with a push rod 11; the pneumatic device 15 is connected to the push rod 11, and by driving the push rod 11 to slide, the torsion bar 3 is pressed against or separated from the chassis beam 13, so as to realize the locking or unlocking of the suspension.

[0027] The pin connection assembly 4 includes two pins 10, a rubber pad 9, and a connector 8. One pin 10 passes through the connecting holes of the rubber pad 9, the connector 8, and the chassis suspension 14, and is then secured with a nut. The other pin 10 passes through either the rubber pad 9 and any hole at the end of the torsion bar 3, and is also secured with a nut. The connector 8 and the torsion bar 3 are rotatably connected. This configuration ensures effective force transmission between the torsion bar 3 and the chassis suspension 14 through the double pin connection. Simultaneously, the rotatable design avoids interference with the normal driving state of the vehicle, ensuring the reliability of the connection and the smoothness of the ride. The upper part of the pin 10 is a smooth cylindrical structure, and the lower part is a high-strength threaded structure. The entire pin is galvanized. The smooth cylindrical structure allows the pin 10 to rotate freely within the hole, while the high-strength thread, combined with the nut, provides a secure and tight fit, preventing loosening. The overall galvanization effectively improves the pin's corrosion resistance and extends its service life. Rubber pad 9 is placed between pin 10 and torsion bar 3, and between pin 10 and chassis suspension 14 to avoid direct contact between metal structural parts, achieve buffering and shock absorption and reduce operating noise. Rubber pad 9 can effectively absorb vibration, reduce wear between metal parts, extend the service life of structural parts, and reduce noise pollution during locking and unlocking.

[0028] The pin 10 in the pin connection assembly 4 can selectively pass through any of the holes to adapt to the connection requirements under different working conditions. By selecting different hole positions for connection, the relative position of the torsion bar 3 and the chassis suspension 14 can be flexibly adjusted, so that the locking device can adapt to the operating requirements of the vehicle under different loads and different road conditions, thus improving the versatility and adaptability of the device.

[0029] The fastening device 2 also includes a main beam connector 12. The push rod 11 passes through a pre-drilled hole in the main beam connector 12. The main beam connector 12 wraps around the torsion bar 3 and is fastened to the chassis main beam 13 with bolts to pre-fix the torsion bar 3 to one side of the chassis main beam 13. This setting pre-fixes the torsion bar 3 through the main beam connector 12, avoiding the torsion bar 3 from shaking in the non-locked state. This lays a stable foundation for the subsequent push rod 11 to drive the torsion bar 3 to stick to the chassis main beam 13 and improves the accuracy of the locking action.

[0030] The pneumatic device 15 includes a single-acting cylinder, an air pipe 6, and a controller 7. The single-acting cylinder is connected to the controller 7 via the air pipe 6, and the output end of the single-acting cylinder is connected to the push rod 11. The push rod 11 is driven to slide back and forth along the axial direction by compressed gas, so that the torsion bar 3 is pressed against or separated from the chassis beam 13, thereby controlling the opening and closing of the suspension locking system. The compressed gas drive provides a rapid response and stable driving force. In conjunction with the controller 7, it enables convenient control of locking and unlocking the chassis suspension 14, simplifying the operation process and improving work efficiency. The single-acting cylinder includes a left single-acting cylinder 5 and a right single-acting cylinder 1, which are respectively connected to the push rod 11 in the fastening device 2 on the same side. They are symmetrically arranged on both sides of the vehicle. The symmetrical arrangement can make the force on both sides of the torsion bar 3 balanced, avoiding structural deformation caused by excessive force on one side, and ensuring the stability and reliability of the overall structure when the chassis suspension 14 is locked.

[0031] Working principle:

[0032] When the outriggerless aerial work platform equipped with this locking device reaches the designated work position, the controller 7 is turned on to supply air. The air enters the left single-acting cylinder 5 and the right single-acting cylinder 1 through the air pipe 6. Under the action of the air, the cylinder shafts extend, and the cylinder shafts drive the push rod 11 to move synchronously. The movement of the push rod 11 presses the torsion bar 3 tightly against the surface of the chassis beam 13, making it fixed and unable to move. When the chassis suspension 14 is subjected to force and wants to deform, the overall force is transmitted to the torsion bar 3 through the pin connection assembly 4. However, since the torsion bar 3 has been pressed and fixed by the cylinders, it cannot deform or move, thus achieving suspension locking.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A locking device for the suspension of a legless aerial work platform, characterized in that, Includes a pin connection assembly (4), a fastening device (2), and a pneumatic device (15); The pin connection assembly (4) connects the torsion bar (3) and the chassis suspension (14) respectively, thereby realizing the connection between the torsion bar (3) and the chassis suspension (14); The fastening device (2) is sleeved on the outside of the torsion bar (3) and fixed to the chassis beam (13). The fastening device (2) is provided with a push rod (11). The pneumatic device (15) is connected to the push rod (11). By driving the push rod (11) to slide, the torsion bar (3) is brought into contact with or separated from the chassis beam (13) to achieve the locking or unlocking of the suspension.

2. The locking device for the suspension of a legless aerial work platform according to claim 1, characterized in that, The pin connection assembly (4) includes two pins (10), a rubber pad (9), and a connector (8); one of the pins (10) passes through the connection holes of the rubber pad (9), the connector (8), and the chassis suspension (14) and is then fastened by a nut; the other pin (10) passes through either the hole at the end of the rubber pad (9) and the torsion bar (3) and is then fixed by a nut, and the connector (8) and the torsion bar (3) are rotatably connected.

3. The locking device for the suspension of a legless aerial work platform according to claim 2, characterized in that, The upper part of the pin (10) is a smooth cylindrical structure, the lower part is a high-strength threaded structure, and the whole is galvanized.

4. The locking device for the suspension of a legless aerial work platform according to claim 1, characterized in that, The fastening device (2) also includes a beam connector (12), the push rod (11) passes through a pre-drilled hole in the beam connector (12), the beam connector (12) wraps around the torsion bar (3) and is fastened to the chassis beam (13) by bolts, so as to pre-fix the torsion bar (3) to one side of the chassis beam (13).

5. The locking device for the suspension of a legless aerial work platform according to claim 1, characterized in that, The pneumatic device (15) includes a single-acting cylinder, an air pipe (6), and a controller (7); the single-acting cylinder is connected to the controller (7) through the air pipe (6), and the output end of the single-acting cylinder is connected to the push rod (11). The push rod (11) is driven to slide back and forth along the axial direction by compressed gas, so that the torsion bar (3) is close to or separate from the chassis beam (13), thereby controlling the opening and closing of the suspension locking system.

6. The locking device for the suspension of a legless aerial work platform according to claim 5, characterized in that, The single-acting cylinders include a left single-acting cylinder (5) and a right single-acting cylinder (1), which are respectively connected to the push rod (11) in the fastening device (2) on the same side and are symmetrically arranged on both sides of the vehicle.

7. The locking device for the suspension of a legless aerial work platform according to claim 2, characterized in that, The rubber pad (9) is placed between the pin (10) and the torsion bar (3), and between the pin (10) and the chassis suspension (14) to avoid direct contact between metal structural components, thereby achieving buffering and shock absorption and reducing operating noise.

8. The locking device for the suspension of a legless aerial work platform according to claim 1, characterized in that, The torsion bar (3) has multiple holes arranged along its length at its end. The pin (10) in the pin connection assembly (4) can selectively pass through any hole in the torsion bar (3) to adapt to the connection requirements under different working conditions.

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