Rotary telescopic boom forklift truck with movable counter weight

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a rotary telescopic boom forklift loader with a movable counterweight, which comprises a chassis, a turntable, a boom, a forklift accessory, an accessory switching device, a cab, a display controller, a wind speed and direction sensor, a length sensor, an angle sensor and a weighing sensor, the wind speed and wind direction sensor is fixed to the upper portion of the accessory switching device and detects the wind direction and the wind speed, the length sensor and the angle sensor detect the working posture of the boom, the weighing sensor detects the load state, and the display controller calculates the reasonable position of the balance weight. The movable counter weight is driven by the counter weight driving mechanism to move back and forth on the turntable bottom plate, so that the stability and the safety of the whole vehicle are effectively improved; through the movable balance weight, the gravity center force arm can be increased, under the condition of the same stable moment requirement, the needed balance weight is reduced, and the weight of the whole vehicle is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, and particularly relates to a rotary telescopic boom forklift truck with a movable counterweight. Background Art

[0002] The telescopic boom forklift truck is a continuation and development of the traditional forklift truck. Its advantage is that it organically combines the telescopic boom structure of a truck crane with the functions of a traditional forklift truck, makes full use of the characteristics of the telescopic boom structure that can extend high and far, and cooperates with various working attachments, effectively expanding the working range of the forklift truck and improving the adaptability of the forklift truck to the working site.

[0003] Patent CN200920311166.X discloses a rotary telescopic boom forklift truck, which includes a vehicle frame, a front X-shaped outrigger arranged at the front end of the vehicle frame, a telescopic boom structure, a driver's cab and a counterweight. A slewing bearing is arranged above the vehicle frame, and a slewing platform is arranged on the slewing bearing. The telescopic boom structure, the driver's cab and the counterweight are arranged on the slewing platform, and a rear X-shaped outrigger is arranged at the rear end of the vehicle frame. Since its counterweight is fixedly arranged on the slewing platform and cannot move, in order to increase the overall stability of the machine, there is generally a design redundancy in the weight of the counterweight, resulting in a relatively large overall vehicle mass. At the same time, this application does not involve the influence of external load changes such as wind load. When the working height is relatively large, the wind load has a great influence on the tipping moment. And different wind directions have different influences on the tipping moments of different luffing angles of the boom. Sometimes it generates a tipping moment, and sometimes it can play a role of a stabilizing moment. If the wind speed is measured alone without distinguishing the wind direction, the adjustment measures will be counterproductive. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rotary telescopic boom forklift truck with a movable counterweight. By means of the movable counterweight, the center of gravity arm can be increased. Under the condition of the same requirement for the stabilizing moment, the required counterweight weight can be reduced, effectively reducing the overall vehicle weight;

[0005] By means of an angle sensor, a length sensor, a weighing sensor and a wind speed and direction sensor, parameters such as the working attitude of the boom, the load state, the wind speed and the wind direction are detected in real time, and the position of the counterweight is reasonably adjusted to realize the adjustment of the stabilizing moment, effectively improving the overall stability and safety of the vehicle.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] A rotary telescopic forklift truck with a movable counterweight, comprising a chassis, a turntable, a boom, a forklift attachment, an attachment adapter device and a cab. The two ends of the boom are respectively connected to the turntable and the attachment adapter device; the forklift attachment is fixed to the attachment adapter device, and the cab is fixed to the turntable; the chassis, the turntable, the boom, the forklift attachment, the attachment adapter device and the cab constitute the main structure of the telescopic forklift truck; the turntable is rotatably connected to the chassis; a wind speed and wind direction sensor is fixed to the upper part of the attachment adapter device, and the wind speed and wind direction sensor is electrically connected to a display controller;

[0008] A movable counterweight is provided at one end of the turntable away from the forklift attachment.

[0009] The wind speed and wind direction at the position where the forklift workpiece is located can be detected by the wind speed and wind direction sensor, and the display controller makes corresponding analysis in time and adjusts the position of the movable counterweight, so as to change the center of gravity position of the movable counterweight to adjust the moment.

[0010] The present utility model is further arranged as follows: a length sensor and an angle sensor are installed at one end of the boom close to the turntable, and both the length sensor and the angle sensor are electrically connected to the display controller.

[0011] A weighing sensor is installed at the lower part of the attachment adapter device.

[0012] The length sensor and the angle sensor can detect the working attitude of the boom, the weighing sensor can detect the weight of the forklift workpiece, and each sensor can transmit relevant signals to the display controller, and the display controller can further comprehensively analyze and calculate the reasonable position of the movable counterweight.

[0013] The present utility model is further arranged as follows: a rectangular chute is formed on the turntable, and the movable counterweight is placed in the rectangular chute;

[0014] The turntable is hinged with a counterweight driving mechanism, the other end of the counterweight driving mechanism is hinged with the movable counterweight, and the height of the hinge connection point of the counterweight driving mechanism and the turntable is greater than the height of the hinge connection point of the counterweight driving mechanism and the movable counterweight.

[0015] The counterweight driving mechanism drives the movable counterweight obliquely downward. The downward driving component force of the counterweight driving mechanism makes the movable counterweight fit and move with the bottom plate of the rectangular chute, and the horizontal driving component force of the counterweight driving mechanism drives the movable counterweight to move back and forth in the rectangular chute. The rectangular chute can limit the general position of the movable counterweight.

[0016] The present utility model is further arranged as follows: a counterweight sliding block is provided between the bottom of the movable counterweight and the bottom surface of the rectangular chute, and a counterweight side sliding block is provided between the movable counterweight and the side wall of the rectangular chute.

[0017] The counterweight sliding block and the counterweight side sliding block are fixed on the movable counterweight, which can further increase the weight of the movable counterweight;

[0018] The counterweight sliding block and the counterweight side sliding block are arranged away from the fork attachment, which can further move the center of the movable counterweight outward, making it farther away from the fork attachment, and the effect of the stabilizing moment is better.

[0019] The outstanding effect of the present utility model is:

[0020] Compared with the prior art, through the movable counterweight, the center of gravity arm can be increased. Under the condition of the same demand for the stabilizing moment, the required counterweight weight is reduced, effectively reducing the weight of the whole vehicle;

[0021] Through the angle sensor, length sensor, weighing sensor and wind speed and direction sensor, parameters such as the working attitude of the boom, load state, wind speed and wind direction are detected in real time, and the counterweight position is reasonably adjusted to realize the adjustment of the stabilizing moment, effectively improving the stability and safety of the whole vehicle. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the whole vehicle structure under the large boom angle working condition of the present utility model;

[0023] Figure 2 It is a partial schematic diagram in the top view direction of the present utility model;

[0024] Figure 3 It is a schematic diagram of the whole vehicle structure under the large working amplitude condition of the present utility model;

[0025] Figure 4 For Figure 1 Partial enlarged view of A.

[0026] Reference numerals: 1, chassis; 2, turntable; 3, boom; 4, fork attachment; 5, wind speed and direction sensor; 6, display controller; 7, length sensor; 8, angle sensor; 9, weighing sensor; 10, attachment adapter device; 11, cab;

[0027] 201, rectangular chute; 202, movable counterweight; 203, counterweight side sliding block; 204, counterweight sliding block; 205, counterweight drive mechanism. Detailed Embodiments

[0028] The following will further describe in detail the specific embodiments of the present utility model with reference to the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0029] The following will describe Figures 1 to 4 the present utility model:

[0030] Embodiment: A rotary telescopic forklift truck with a movable counterweight, comprising a chassis 1, a turntable 2, a boom 3, a forklift attachment 4, a display controller 6, a length sensor 7, an angle sensor 8, a weighing sensor 9, an attachment adapter 10, and a cab 11.

[0031] In this embodiment, the chassis 1, turntable 2, boom 3, forklift attachment 4, attachment adapter 10, and cab 11 of the rotary telescopic forklift truck constitute the main structure of the vehicle.

[0032] On the turntable 2 of the rotary telescopic forklift truck in this embodiment, there are also a movable counterweight 202, counterweight side sliders 203, counterweight lower sliders 204, and a counterweight drive mechanism 205.

[0033] In this embodiment, the movable counterweight 202 is placed in the rectangular chute 201 of the turntable.

[0034] In this embodiment, four counterweight lower sliders 204 are symmetrically installed at one end of the lower part of the movable counterweight 202 away from the forklift attachment 4, and three counterweight side sliders 203 are installed on each side at one end of the two sides of the movable counterweight 202 away from the forklift attachment 4. The counterweight drive mechanism 205 is hingedly connected to the turntable 2 and the movable counterweight 202. The height of the hinge connection point between the counterweight drive mechanism 205 and the turntable 2 is greater than the height of the hinge connection between the counterweight drive mechanism 205 and the movable counterweight 202. The counterweight drive mechanism 205 drives the movable counterweight 202 obliquely downward. The downward driving component force of the counterweight drive mechanism 205 makes the movable counterweight 202 fit and move along the bottom surface of the rectangular chute, and the horizontal driving component force of the counterweight drive mechanism 205 drives the movable counterweight 202 to move back and forth in the rectangular chute.

[0035] Preferably, in this embodiment, the counterweight drive mechanism 205 is an electric push rod mechanism, which has its own telescopic position detection for detecting the position of the movable counterweight 202.

[0036] In this embodiment, the length sensor 7 and the angle sensor 8 are installed at one end of the boom 3 to monitor the length and angle change of the boom 3 in real time.

[0037] In this embodiment, the weighing sensor 9 is installed at the lower part of the attachment adapter 10 to detect the load state.

[0038] In this embodiment, the wind speed and direction sensor 5 is fixed on the upper part of the attachment adapter 10, which does not affect normal operation and is not blocked to affect the monitoring result. Preferably, the wind speed and direction sensor 5 is an ultrasonic wind speed and direction sensor.

[0039] See Figure 1, under the condition of large amplitude change angle, the center of gravity of the whole machine is biased towards the rear of the cab 11. Under this condition, the reverse wind load generates a tipping moment, and the forward wind load generates a stabilizing moment. See Figure 3 , under the condition of large working amplitude, the center of gravity of the whole machine is biased towards the front of the cab 11. Under this condition, the forward wind load generates a tipping moment, and the reverse wind load generates a stabilizing moment.

[0040] The display controller 6 of this embodiment is installed in the cab 11. The display controller 6 is used for real-time processing of parameters, display and alarm. The display controller 6 calculates the reasonable position of the counterweight; according to the calculation result, the counterweight driving mechanism 205 drives the movable counterweight 202 to move back and forth in the rectangular chute to realize the adjustment of the stabilizing moment.

[0041] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications made by the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A slewing telescopic forklift with a movable counterweight, comprising a chassis (1), a turntable (2), a boom (3), a fork-mounted attachment (4), an attachment adapter (10) and a cab (11), wherein two ends of the boom (3) are respectively connected to the turntable (2) and the attachment adapter (10); the fork-mounted attachment (4) is fixed to the attachment adapter (10), and the cab (11) is fixed to the turntable (2); and characterized in that: A movable counterweight (202) is provided at one end of the turntable (2) away from the fork-mounted attachment (4); The turntable (2) is rotatably connected to the chassis (1); a wind speed and direction sensor (5) is fixed to the upper part of the attachment adapter (10).

2. A rotary telescopic forklift with a movable counterweight according to claim 1, characterized in that: A length sensor (7) and an angle sensor (8) are installed at one end of the arm (3) close to the turntable (2).

3. A rotary telescopic forklift with a movable counterweight according to claim 1 or 2, characterized in that: A weighing sensor (9) is installed at the lower part of the attachment adapter (10).

4. A rotary telescopic forklift with a movable counterweight according to claim 1, characterized in that: The turntable (2) is formed with a rectangular slide groove (201), and the movable counterweight (202) is placed in the rectangular slide groove (201); The turntable (2) is hingedly connected to a counterweight driving mechanism (205), and the other end of the counterweight driving mechanism (205) is hingedly connected to a movable counterweight (202).

5. A rotary telescopic forklift with a movable counterweight according to claim 4, characterized in that: A counterweight lower slider (204) is provided between the bottom of the movable counterweight (202) and the bottom surface of the rectangular slide groove (201), and a counterweight side slider (203) is provided between the movable counterweight (202) and the side wall of the rectangular slide groove (201).

6. A rotary telescopic forklift with a movable counterweight according to claim 5, characterized in that: The counterweight lower slider (204) and the counterweight side slider (203) are fixed on the movable counterweight (202); The counterweight lower slider (204) and the counterweight side slider (203) are arranged away from the fork-mounted attachment (4).

Images