Telescopic boom forklift truck with movable counter weight on chassis

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a telescopic boom forklift loader with a movable counterweight on a chassis, which comprises a chassis, 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 chassis bottom plate, the stability and safety of the whole vehicle are effectively improved, and the weight of the whole vehicle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to a telescopic boom forklift truck with a movable counterweight on the chassis. Background Art

[0002] During the operation of construction machinery such as telescopic boom forklift trucks, aerial work platforms, and cranes, the working range of the working amplitude and working height changes greatly. The tipping moments caused by different working amplitudes, working heights, and different loads vary greatly. Setting a counterweight is an important measure to increase the stabilizing moment, but a fixed counterweight cannot achieve the best balance moment under different working conditions.

[0003] Patent US 09 / 394616 (domestic publication number CN 1287966A) discloses an aerial work device, in which a movable counterweight body can move in response to the rotation of the cantilever to always maintain the optimal balance of the device during the movement of the cantilever and the platform. However, its movable counterweight body responds to the rotation of a single cantilever, that is, it responds to the luffing, and cannot adapt to the change of the telescopic amplitude of the telescopic boom, nor does it involve the influence of external loads such as wind loads.

[0004] Patent CN 220078509U discloses a telescopic boom forklift truck. The telescopic boom forklift truck of the present application realizes the movable design of the counterweight body. Under the same working height and working amplitude, it not only reduces the weight of the whole vehicle, helps to reduce the operation power consumption, improves the economy and mobility, but also effectively improves the stability and safety of the whole vehicle. However, its movable counterweight body is cantilever-mounted on the support structure, and the support structure is subjected to great force under the movement impact condition. As described in its specification, in order to make the support more reliable and avoid the up-and-down shaking of the counterweight body, the measure is that the cross-sectional area of the counterweight body gradually decreases from front to back so that the center of gravity position of the counterweight body is close to the chassis, and the support structure is connected to the front end of the counterweight body. The center of gravity position of the counterweight body is closer to the support structure, shortening the force arm of the counterweight body relative to the support structure. Although this measure alleviates its own problems, the center of gravity force arm of its counterweight body is shortened. Under the same requirement of stabilizing moment, the weight of the counterweight body needed needs to be increased, and this solution requires creative improvement. The present application also does not involve the influence of external loads such as wind loads.

[0005] 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 stabilizing moment role. If the wind speed is measured alone without distinguishing the wind direction, the adjustment measures will be counterproductive. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a telescopic boom forklift truck with a movable counterweight on the chassis. 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 stability and safety of the whole vehicle.

[0007] The above technical purpose of the present utility model is achieved through the following technical solutions:

[0008] A telescopic boom forklift truck with a movable counterweight on the chassis includes a chassis, a cab, a boom, a forklift attachment, a wind speed and direction sensor, a display controller and an attachment adapter device; the chassis, the cab, the boom, the forklift attachment and the attachment adapter device constitute the main structure of the telescopic boom forklift truck; the lower end of the boom is hinged to the chassis, and the upper end of the boom is connected to the forklift attachment through the attachment adapter device; a movable counterweight, a counterweight side slider, a counterweight lower slider and a counterweight driving mechanism are provided at one end of the chassis away from the cab; the counterweight driving mechanism is an electric push rod mechanism and is arranged between the movable counterweight and the cab; one end of the counterweight driving mechanism is hinged to the movable counterweight, and the other end is hinged to the chassis;

[0009] The wind speed and direction sensor is installed on the attachment adapter device, and the wind speed and direction sensor is electrically connected to the display controller. The wind speed and direction sensor is fixed on the upper part of the attachment adapter device, which does not affect normal operation and is not blocked to affect the monitoring result.

[0010] The wind speed and direction sensor can detect the real-time wind speed and wind direction, and transmit the relevant information to the display controller for processing. After analysis, the display controller calculates the reasonable position of the movable counterweight, and then the counterweight driving mechanism drives the movable counterweight to move to the corresponding position.

[0011] The present utility model is further arranged as follows: the chassis includes a chassis bottom plate and a pair of chassis side plates symmetrically fixed on the chassis bottom plate; the movable counterweight is located between the chassis bottom plate and the pair of chassis side plates;

[0012] The counterweight side slider is located between the side wall of the movable counterweight and the corresponding chassis side plate and is fixed at one end of the movable counterweight away from the cab;

[0013] The counterweight lower slider is located between the bottom surface of the movable counterweight and the chassis bottom plate and is fixed at one end of the movable counterweight away from the cab.

[0014] The counterweight side slider can roughly guide the moving direction of the movable counterweight, and the resistance during the movement of the movable counterweight can be reduced through the counterweight lower slider;

[0015] At the same time, the counterweight side slider and the counterweight lower slider are arranged at the outer end of the movable counterweight, which can move the center of gravity of the movable counterweight outward. Under the same torque requirement, the counterweight weight can be reduced, thereby reducing the vehicle mass.

[0016] The present utility model is further configured as: a length sensor and an angle sensor are installed at one end of the boom close to the chassis;

[0017] A weighing sensor is installed at the lower part of the attachment adapter device. The weighing sensor, the length sensor and the angle sensor are all electrically connected to the display controller.

[0018] 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 counterweight; according to the calculation result, the counterweight driving mechanism drives the movable counterweight to move back and forth on the chassis bottom plate to realize the adjustment of the stabilizing torque.

[0019] The present utility model is further configured as: the mass of the part of the movable counterweight away from the cab is greater than the mass of the part of the movable counterweight close to the cab.

[0020] The center of gravity of the movable counterweight is far from the boom, and the center of gravity arm is increased. Under the same stabilizing torque requirement, the weight of the movable counterweight required is reduced, effectively reducing the vehicle weight.

[0021] The present utility model is further configured as: the wind speed and direction sensor is an ultrasonic wind speed and direction sensor.

[0022] The outstanding effect of the present utility model is:

[0023] Compared with the prior art, through the angle sensor, the length sensor, the weighing sensor and the wind speed and direction sensor, parameters such as the working posture of the boom, the load state, the wind speed and the wind direction are detected in real time, the counterweight position is reasonably adjusted, the adjustment of the stabilizing torque is realized, and the vehicle stability and safety are effectively improved. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the vehicle structure under the large boom angle condition of the present utility model;

[0025] Figure 2 is a partial schematic diagram in the top view direction of the present utility model;

[0026] Figure 3 is a schematic diagram of the vehicle structure under the large working range condition of the present utility model;

[0027] Figure 4 is Figure 3 a partial enlarged view of A.

[0028] Reference signs: 1, chassis; 2, cab; 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

[0029] 101, chassis bottom plate; 102, movable counterweight; 103, counterweight side slider; 104, counterweight lower slider; 105, counterweight drive mechanism; 106, chassis side plate Detailed implementation manners

[0030] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model

[0031] Refer to Figures 1 to 4 to illustrate the present utility model

[0032] Embodiment: A telescopic forklift truck with a movable counterweight on the chassis, including a chassis 1, a cab 2, a boom 3, a fork attachment 4, a wind speed and direction sensor 5, a display controller 6 and an attachment adapter device 10; the lower end of the boom 3 is hinged to the chassis 2, and the upper end of the boom 3 is connected to the fork attachment 4 through the attachment adapter device 10. The chassis 1, the cab 2, the boom 3, the fork attachment 4, and the attachment adapter device 10 constitute the main structure of the telescopic forklift truck; a movable counterweight 102, a counterweight side slider 103, a counterweight lower slider 104 and a counterweight drive mechanism 105 are provided at one end of the chassis 1 away from the cab 2; the counterweight drive mechanism 105 is an electric push rod mechanism and is arranged between the movable counterweight 102 and the cab 2; one end of the counterweight drive mechanism 105 is hinged to the movable counterweight 102, and the other end is hinged to the chassis 2

[0033] In this embodiment, a wind speed and direction sensor 5 is installed on the attachment adapter device 10. The wind speed and direction sensor is electrically connected to the display controller. The wind speed and direction sensor 5 is fixed on the upper part of the attachment adapter device 10, which does not affect normal operation and is not blocked to affect the monitoring result. The wind speed and direction sensor 5 is an ultrasonic wind speed and direction sensor

[0034] The chassis 1 of this embodiment includes a chassis bottom plate 101 and a pair of chassis side plates 106 symmetrically fixed on the chassis bottom plate 101; the movable counterweight 102 is located between the chassis bottom plate 101 and the pair of chassis side plates 106

[0035] The counterweight side slider 103 of this embodiment is located between the side wall of the movable counterweight 102 and the corresponding chassis side plate 106 and is fixed at one end of the movable counterweight 102 away from the cab 2

[0036] The counterweight sliding block 104 of this embodiment is located between the bottom surface of the movable counterweight 102 and the chassis bottom plate 101 and is fixed to one end of the movable counterweight 102 away from the cab 2.

[0037] The counterweight side slider 103 of this embodiment can generally guide the moving direction of the movable counterweight 102, and the resistance during the movement of the movable counterweight 102 can be reduced through the counterweight sliding block 104;

[0038] At the same time, the counterweight side slider 103 and the counterweight sliding block 104 of this example are arranged at the outer end of the movable counterweight 102, which can shift the center of gravity of the movable counterweight 102 outward. Under the same torque requirement, the counterweight can be reduced, thereby reducing the vehicle mass.

[0039] One end of the boom 3 of this embodiment close to the chassis 1 is equipped with a length sensor 7 and an angle sensor 8;

[0040] The lower part of the attachment adapter device 10 of this embodiment is equipped with a weighing sensor 9, and the weighing sensor 9, the length sensor 7 and the angle sensor 8 are all electrically connected to the display controller 6.

[0041] The length sensor 7 and the angle sensor 8 of this embodiment detect the working attitude of the boom, the weighing sensor 9 detects the load state, and the display controller 6 calculates the reasonable position of the counterweight; according to the calculation result, the counterweight driving mechanism 105 drives the movable counterweight 102 to move back and forth on the chassis bottom plate 101 to realize the adjustment of the stabilizing torque.

[0042] As Figure 4 shown, the movable counterweight 102 is bisected by a dotted line, and the mass of the part of the movable counterweight 102 away from the cab 2 is greater than the mass of the part of the movable counterweight 102 close to the cab 2.

[0043] The center of gravity of the movable counterweight 102 of this embodiment is far from the boom 3, and the center of gravity arm is increased. Under the same requirement of stabilizing torque, the weight of the movable counterweight 102 required is reduced, effectively reducing the vehicle weight.

[0044] See Figure 1 , in the case of a large luffing angle working condition, the center of gravity of the whole machine is biased towards the rear of the cab 2. In this working condition, the reverse wind load generates an overturning moment, and the forward wind load generates a stabilizing torque. See Figure 3 , in the case of a large working amplitude working condition, the center of gravity of the whole machine is biased towards the front of the cab 2. In this working condition, the forward wind load generates an overturning moment, and the reverse wind load generates a stabilizing torque.

[0045] The display controller 6 of this embodiment is installed in the cab 2. 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 105 drives the movable counterweight 102 to move back and forth on the upper surface of the chassis bottom plate 101, so as to realize the adjustment of the stabilizing moment.

[0046] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications made under the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A telescopic forklift truck with a chassis having a movable counterweight, comprising a chassis (1), a cab (2), a boom (3), a fork-mounted attachment (4), a wind speed and direction sensor (5), and an attachment adapter (10); characterized in that: A movable counterweight (102), a counterweight side slider (103), a counterweight lower slider (104), and a counterweight driving mechanism (105) are provided at one end of the chassis (1) away from the cab (2); the counterweight driving mechanism (105) is arranged between the movable counterweight (102) and the cab (2); A wind speed and direction sensor (5) is installed on the accessory adapter (10).

2. A telescopic forklift with a chassis having a movable counterweight according to claim 1, characterized in that: The chassis (1) comprises a chassis bottom plate (101) and a pair of chassis side plates (106) symmetrically fixed on the chassis bottom plate (101); the movable counterweight (102) is located between the chassis bottom plate (101) and the pair of chassis side plates (106); The counterweight side slider (103) is located between the side wall of the movable counterweight (102) and the corresponding chassis side plate (106) and is fixed to an end of the movable counterweight (102) away from the cab (2); The counterweight lower slider (104) is located between the bottom surface of the movable counterweight (102) and the chassis bottom plate (101) and is fixed to an end of the movable counterweight (102) away from the cab (2).

3. A telescopic forklift with a chassis having a movable counterweight according to claim 2, characterized in that: A length sensor (7) and an angle sensor (8) are installed at one end of the arm (3) close to the chassis (1); A weighing sensor (9) is installed at the lower part of the attachment adapter (10).

4. A telescopic forklift with a chassis having a movable counterweight according to claim 1, characterized in that: The mass of the portion of the movable counterweight (102) that is away from the cab (2) is greater than the mass of the portion of the movable counterweight (102) that is close to the cab (2).

5. A telescopic forklift with a chassis having a movable counterweight according to claim 1, characterized in that: The wind speed and direction sensor (5) is an ultrasonic wind speed and direction sensor.

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