CN216105857U

CN216105857U - Gravity center adjustable forklift counterweight

Info

Publication number: CN216105857U
Application number: CN202121779345.3U
Authority: CN
Inventors: 孟洋; 葛立银; 李�瑞; 胡祝田
Original assignee: Anhui Heli Co Ltd
Current assignee: Anhui Heli Co Ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-03-22
Anticipated expiration: 2031-07-29

Abstract

The utility model discloses a forklift counterweight with adjustable gravity center, which comprises a counterweight assembly fixedly connected to a forklift body, the counterweight assembly comprises a counterweight main body fixedly connected with the vehicle body, the counterweight main body is connected with a sliding counterweight assembly in a sliding way, the counterweight main body is provided with an accommodating cavity for accommodating the sliding counterweight assembly, a chute boss is arranged in the accommodating cavity, the sliding counterweight assembly comprises a sliding counterweight block main body which is connected in the containing cavity in a sliding way through a sliding chute lug boss, the counterweight main body is provided with a driving part for driving the sliding counterweight assembly to reciprocate, and the adjustable counterweight is arranged, on the premise of keeping the wheelbase unchanged, the gravity center position of the forklift is changed, the stability of the forklift in the process of lifting and descending goods is improved, and the impact caused in the goods acceleration stage is reduced; in the process of no-load running of the forklift, the gravity center moves forwards, the load of the rear steering wheel is reduced, and the service life of the rear steering wheel is prolonged.

Description

Gravity center adjustable forklift counterweight

Technical Field

The utility model relates to the technical field of forklift counterweight, in particular to a forklift counterweight with adjustable gravity center.

Background

The main working mode of the balance weight type forklift can be understood as a lever principle, the center of a front wheel is taken as a lever fulcrum, one end of the front wheel is taken as the weight of goods, the other end of the front wheel is taken as the weight of a forklift body, the balance weight is taken as the most important component of the forklift body, the weight and the gravity center of the forklift body are directly influenced by the weight and the gravity center position of the balance weight, and the comprehensive stability of the whole forklift is further determined. At present, the counter weight of the domestic counter weight type forklift is directly installed on a frame, no relative motion exists between the counter weight and the frame, and the gravity center and the mass of the counter weight are fixed and unchanged after the counter weight is installed. Fork truck actually has an acceleration at the initial stage that the goods rises to rise, and the power that the fork bore this moment can surpass fork truck's the biggest bearing capacity of itself, often arouses lifting up of rear wheel easily this time, has certain potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a forklift counterweight with an adjustable gravity center, which aims to solve the problems in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a focus adjustable fork truck counter weight, includes the counter weight assembly of fixed connection on the automobile body, the counter weight assembly include with automobile body fixed connection's counter weight main part, sliding connection has the slip counter weight assembly in the counter weight main part, it is used for holding to open in the counter weight main part the chamber that holds of slip counter weight assembly, it is equipped with the spout boss to hold the intracavity, slip counter weight assembly is including the slip counter weight main part, the slip counter weight main part pass through spout boss sliding connection in hold the intracavity, be equipped with in the counter weight main part and be used for the drive slip counter weight assembly reciprocating motion's drive division.

As a further scheme of the utility model: the vehicle body comprises a vehicle frame, a front wheel and a rear wheel, wherein the front wheel and the rear wheel are arranged below the vehicle frame, the counterweight assembly is fixedly connected with the vehicle frame, and the counterweight assembly is positioned behind the rear wheel.

As a further scheme of the utility model: the front end of the accommodating cavity is of an open structure, the rear end of the accommodating cavity is of a limiting surface, the front end of the accommodating cavity is of a frame, and the sliding counterweight assembly is connected between the limiting surface and the frame in a sliding mode.

As a further scheme of the utility model: the width that holds the chamber diminishes from top to bottom gradually, the width of slip balancing weight main part reduces from top to bottom gradually.

As a further scheme of the utility model: the driving part comprises a driving motor fixedly connected with the counterweight main body, a driving gear is fixedly connected to an output shaft of the driving motor, a fixed rack is arranged at the upper end of the sliding counterweight main body, and the driving gear is meshed with the fixed rack.

As a further scheme of the utility model: the drive motors are two, two mounting surfaces are arranged at the upper end of the counterweight main body and located on two sides of the accommodating cavity, and the drive motors are fixed on the two mounting surfaces respectively.

As a further scheme of the utility model: the accommodating cavity, the sliding groove boss and the fixed rack are arranged in parallel.

Compared with the prior art, the utility model has the beneficial effects that:

1. by arranging the adjustable balance weight, the gravity center position of the forklift is changed on the premise that the wheelbase is not changed, the stability of the forklift in the process of lifting and descending goods is improved, and the impact caused by the goods acceleration stage is reduced; in the no-load running process of the forklift, the gravity center moves forwards, the load of the rear steering wheel is reduced, and the service life of the rear steering wheel is prolonged;

2. this application is through setting up drive arrangement, and at fork truck travel, the in-process of operation, according to the operating mode of fork truck difference to the focus position of fork truck modify, guarantee driver's more steady driving, need not the manual adjustment of stopping.

Drawings

Fig. 1 is a schematic view of the low-position lifting of the goods of the counter-weight forklift according to the embodiment.

Fig. 2 is a schematic view illustrating the cargo level lowering of the counter-weight forklift according to the present embodiment.

Fig. 3 is a schematic view of the operating principle of the counter-weight forklift according to the embodiment.

Fig. 4 is a schematic diagram of the distribution of the center of gravity of the body of the counter-balanced forklift according to the embodiment.

FIG. 5 is a schematic view of the weight assembly of the present embodiment.

FIG. 6 is an exploded view of the weight assembly of the present embodiment.

Fig. 7 is a schematic view of the weight body of the present embodiment.

Fig. 8 is a schematic view of the sliding weight of the present embodiment.

Fig. 9 is a schematic view of the driving mechanism of the present embodiment.

In the figure: 1-cargo, 2-gantry assembly, 21-fork, 3-vehicle body, 31-front wheel, 32-rear wheel, 33-vehicle frame, 4-counterweight assembly, 41-counterweight main body, 411-mounting surface, 412-chute boss, 413-limiting surface, 42-sliding counterweight, 421-fixed rack, 422-sliding counterweight main body, 43-driving part, 431-driving motor and 432-driving gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, in the embodiment of the present invention, a forklift counterweight with an adjustable center of gravity includes a counterweight assembly 4 fixedly connected to a forklift body 3, the forklift body 3 includes a frame 33, and a front wheel 31 and a rear wheel 32 disposed below the frame 33, the counterweight assembly 4 is fixedly connected to the frame 33, the counterweight assembly 4 is disposed behind the rear wheel 32, the counterweight assembly 4 includes a counterweight main body 41 fixedly connected to the forklift body 3, a sliding counterweight assembly 42 is slidably connected to the counterweight main body 41, a containing cavity for containing the sliding counterweight assembly 42 is formed in the counterweight main body 41, a sliding groove boss 412 is disposed in the containing cavity, the front end of the containing cavity is an open structure, the rear end of the containing cavity is a limiting surface 413, the front end of the containing cavity is the frame 33, the sliding counterweight assembly 42 is slidably connected between the limiting surface 413 and the frame 33, the width of the containing cavity gradually decreases from top to bottom, the width of the sliding counterweight main body 422 gradually decreases from top to bottom, sliding counterweight assembly 42 includes sliding counterweight main part 422, sliding counterweight main part 422 passes through spout boss 412 sliding connection and holds the intracavity, be equipped with the drive division 43 that is used for driving sliding counterweight assembly 42 reciprocating motion on counterweight main part 41, drive division 43 includes in counterweight main part 41 fixed connection's driving motor 431, fixedly connected with drive gear 432 on drive motor 431's the output shaft, sliding counterweight main part 422 upper end is equipped with fixed rack 421, hold the chamber, spout boss 412, fixed rack 421 parallel arrangement, drive gear 432 is connected with fixed rack 421 meshing, driving motor 431 is equipped with two, counterweight main part 41 upper end is equipped with two installation faces 411, two installation faces 411 are located and hold the chamber both sides, two driving motor 431 are fixed respectively on two installation faces 411.

Referring to fig. 1 and 2, in two states of the counter-weight forklift during operation, the goods 1 are lifted and lowered by the mast system 2, the forks 21 are used as an actuating mechanism of the mast system to lift and lower the goods to a specified height, the mast system 2 and the counterweight assembly 4 are mounted on a frame 33 of the forklift body 3, the front wheel 31 is mainly responsible for moving and supporting the forklift body 3, the rear wheel 32 is mainly responsible for moving and steering the forklift body, the load ratio of the front wheel 31 to the rear wheel 32 is close to 9:1 under the working condition that the forklift is fully loaded, the load ratio of the front wheel 31 to the rear wheel 32 is close to 4:6 under the working condition that the forklift is unloaded, the bearing capacity of the rear wheel 32 is larger than that of the front wheel 31 during unloaded running, and the counterweight assembly 4 is mounted on the frame 33 and rigidly connected with the frame 33, and the main mass of the counterweight assembly acts on the rear wheel 32.

Referring to fig. 3 and 4, the working principle of the counter-weight forklift is simplified into a lever mechanism, and the most basic condition to be met by the forklift for lifting the goods 1 is F_{Center of gravity of vehicle body}·l_BC≥F_Goods·l_ABHowever, when the goods actually rise and fall in the initial period, the goods have a certain acceleration a, and the condition that the goods 1 need to rise is still ensured to be met in this time is F_{Center of gravity of vehicle body}·l_BC≥(F_Goods+M_Goods·a)·l_ABThe gravity center of the forklift body satisfies the formula F_Others·l_BD+F_{Counterweight}·l_BH＝F_{Center of gravity of vehicle body}·l_BCWherein the force acting on the rear wheel is

The force acting on the front wheel is

In the above formula, the only variable is the position of the center of gravity of the counterweight, i.e., F_{Counterweight}The length of the force arm is changed within a range of l_BF～l_BKWhen F is_{Counterweight}Has a moment arm length of l_BFWhen the load of the rear wheel is minimum, the comprehensive stability is reduced, and when F_{Counterweight}Has a moment arm length of l_BKAt this time, the rear wheel load is the largest, and the comprehensive stability is improved.

Referring to fig. 5 to 9, in the actual operation process, a driver has acceleration at the initial stage of lifting and lowering the cargo 1, the force fed back to the fork 21 by the cargo is different from the gravity of the cargo, the stress of the fork is m (g + a), the control system controls the driving motor 431 to rotate to slide the counterweight assembly 42 to the limit position by detecting the flow change in the hydraulic pipeline, and the arm length of the counterweight assembly 4 is changed into l_BKAt the moment, the comprehensive stability of the whole vehicle is increased, and the risk of leaving the ground of the rear wheel 32 is reduced. When the driver is in the process of no-load driving, the arm length of the counterweight assembly 4 is changed into l_BFAt the moment, the comprehensive stability of the whole vehicle is reduced, but the no-load running is considered, the comprehensive stability can be completely guaranteed, the load of the rear wheel 32 is reduced due to the fact that the moment arm of the counterweight assembly 4 is shortened, the rear wheel 32 serves as a steering wheel, the load is reduced, and the service life of the rear wheel can be further prolonged.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a focus adjustable fork truck counter weight, includes counter weight assembly (4) on fixed connection automobile body (3), a serial communication port, counter weight assembly (4) include with automobile body (3) fixed connection's counter weight main part (41), sliding connection has sliding weight assembly (42) on counter weight main part (41), it has the chamber that holds to open on counter weight main part (41) be used for holding sliding weight assembly (42), it is equipped with spout boss (412) to hold the intracavity, sliding weight assembly (42) are including sliding weight main part (422), sliding weight main part (422) through spout boss (412) sliding connection in hold the intracavity, be equipped with on counter weight main part (41) and be used for the drive sliding weight assembly (42) reciprocating motion's drive division (43).

2. The forklift counterweight with adjustable center of gravity according to claim 1, wherein the body (3) comprises a frame (33) and a front wheel (31) and a rear wheel (32) which are arranged below the frame (33), the counterweight assembly (4) is fixedly connected with the frame (33), and the counterweight assembly (4) is positioned behind the rear wheel (32).

3. The forklift counterweight with adjustable center of gravity according to claim 2, wherein the front end of the accommodating cavity is of an open structure, the rear end of the accommodating cavity is of a limiting surface (413), the front end of the accommodating cavity is of a vehicle frame (33), and the sliding counterweight assembly (42) is connected between the limiting surface (413) and the vehicle frame (33) in a sliding manner.

4. The forklift counterweight with adjustable center of gravity of claim 1, wherein said accommodating cavity has a width that gradually decreases from top to bottom, and said sliding weight body (422) has a width that gradually decreases from top to bottom.

5. The forklift counterweight with adjustable center of gravity according to claim 1, wherein the driving part (43) comprises a driving motor (431) fixedly connected to the counterweight main body (41), a driving gear (432) is fixedly connected to an output shaft of the driving motor (431), a fixed rack (421) is arranged at the upper end of the sliding weight block main body (422), and the driving gear (432) is meshed with the fixed rack (421).

6. The forklift counterweight with adjustable center of gravity according to claim 5, wherein there are two driving motors (431), the counterweight body (41) has two mounting surfaces (411) at the upper end, the two mounting surfaces (411) are located at two sides of the accommodating cavity, and the two driving motors (431) are respectively fixed on the two mounting surfaces (411).

7. The forklift counterweight with adjustable center of gravity according to claim 5, wherein the accommodating cavity, the chute boss (412) and the fixed rack (421) are arranged in parallel.