Electric lifting device for lifting arm

Abstract

The utility model relates to an electric lifting device for lifting a lifting arm. The electric lifting device for the lifting arm is simple in structure, convenient to maintain, low in cost, low in energy consumption and long in service life. The electric lifting device of the lifting arm comprises a driving box, a driving motor and chains, the number of the chains is two, a first rotating shaft and a second rotating shaft which are used for supporting and driving the chains are arranged in the driving box, and two driving gears are fixedly arranged on the first rotating shaft and used for driving the chains to move. The two chains are laid on the two rotating shafts and meshed with the two driving gears respectively, the driving motor is fixedly arranged on the outer wall of the driving box, the output end of the driving motor is meshed with the first rotating shaft gear, and the chains move along with the driving motor driving the first rotating shaft to rotate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lifting arm, in particular to an electric lifting device for lifting of a lifting arm. BACKGROUND

[0002] The lifting arm is widely used, especially in construction engineering, which carries materials to the dolly or unloads materials from the dolly to the designated place. The materials are various, such as kerbstone, brick, etc.

[0003] Most of the lifting arms used in the market are hydraulic cylinder type lifting arms, which grab kerbstone and other materials through a hydraulic cylinder, and then push the lifting arm to complete the material carrying through a hydraulic lifting cylinder. The hydraulic cylinder is prone to oil leakage failure after long-term use, and the maintenance cost is high. After the lifting arm clamps the materials, all the gravity is borne by the hydraulic lifting cylinder, which is not only easy to damage, but also consumes more electric energy, and the service life of the lifting arm is short. SUMMARY

[0004] To solve the defects in the prior art, the utility model provides an electric lifting device for a lifting arm, which is simple in structure, convenient to maintain, low in cost, low in energy consumption and long in service life.

[0005] The utility model relates to an electric lifting device for a lifting arm, which comprises a drive box, a drive motor and a chain, the chain is provided with two roots, two roots of pivot shafts for supporting and driving the chain are arranged in the drive box, the two pivot shafts are respectively first pivot shaft and second pivot shaft, two drive gears are fixedly arranged on the first pivot shaft for driving the chain to move, the two chains are laid on the two pivot shafts and are respectively engaged with the two drive gears, the drive motor is fixedly arranged on the outer wall of the drive box, the output end of the drive motor is engaged with the first pivot shaft gear, and the chain moves with the first pivot shaft rotating driven by the drive motor.

[0006] The utility model relates to an electric lifting device for a lifting arm, two positioning bearings are arranged on the second pivot shaft, the positioning bearings are rotationally connected with the second pivot shaft, and the two chains are respectively clamped on the two positioning bearings.

[0007] The utility model relates to an electric lifting device for a lifting arm, wherein two chain boxes are further arranged in the drive box, and the two chain boxes are fixed in the drive box through the fixed rod.

[0008] The utility model relates to an electric lifting device for a lifting arm, wherein the drive motor is a speed reducer.

[0009] The utility model relates to an electric lifting device for a lifting arm, wherein the first pivot shaft and the second pivot shaft are rotationally connected to the drive box through the bearing seat at both ends.

[0010] The utility model discloses a kind of lifting arm electric lifting devices, wherein the drive box is further provided with multiple reinforcing plates, the multiple reinforcing plates are all fixedly connected on the inner wall of the opposite two sides of the drive box.

[0011] The utility model discloses a kind of lifting arm electric lifting devices, and the difference from prior art is that the utility model uses speed reducer motor chain drive to replace traditional hydraulic cylinder drive, by speed reducer motor drive first rotating shaft equipped with driving gear and then drive two chains to move on the two rotating shafts in drive box, the lifting arm lifting weight is reduced by chain and drive box balance mitigation, reduce energy consumption and failure rate and reduce mechanical wear, greatly prolong the service life of lifting arm, have certain popularization value.

[0012] The utility model will be further described below with reference to the drawings. DRAWINGS

[0013] Figure 1 It is the three-dimensional structure schematic diagram of the utility model of a kind of lifting arm electric lifting device;

[0014] Figure 2 It is the structure schematic diagram of the utility model chain is equipped on drive box.

[0015] Reference signs:

[0016] 1-drive box;11-first rotating shaft;12-driving gear;13-positioning bearing;14-chain box;15-bearing seat;16-reinforcing plate;17-second rotating shaft;2-driving motor;3-chain. DETAILED DESCRIPTION

[0017] As shown in Figure 1 And Figure 2 The utility model discloses a kind of lifting arm electric lifting devices, including drive box 1, driving motor 2 and chain 3, chain 3 is equipped with two, drive box 1 is equipped with two rotating shafts for supporting and driving chain 3, two rotating shafts are first rotating shaft 11 and second rotating shaft 17 respectively, two driving gears 12 for driving chain 3 to move are fixed on first rotating shaft 11, two chains 3 are laid on two rotating shafts and are engaged with two driving gears 12 respectively, driving motor 2 is fixedly arranged on the outer wall of drive box 1, the output end of driving motor 2 is engaged with the gear of first rotating shaft 11, chain 3 moves with driving motor 2 driving first rotating shaft 11 rotation.

[0018] Drive box 1 is cuboid and hollow design up and down, it is convenient to cooperate and connect with other components, such as Figure 2As shown, two rotating shafts are horizontally arranged at the left and right ends of the drive box 1 and kept parallel, which ensures stable support of the chains 3 and prevents side slipping, and ensures that the chains 3 only bear horizontal and vertical tension and prevents the chains 3 from breaking due to uneven force. The two chains 3 are laid on the two rotating shafts and kept parallel, and the two drive gears 12 on the right end first rotating shaft 11 are all keyed to the rotating shaft, so that they are firmly fixed on the first rotating shaft 11 and do not slip, and the two drive gears 12 on the rotating shaft are engaged with the two chains 3 respectively to position and drive the chains 3, as shown in Figure 1 As shown, the drive motor 2 is fixed to the outer wall of the drive box 1 through a fixing frame, which can be on the left side or the right side, and the output shaft of the drive motor 2 is engaged with the gear at one end of the first rotating shaft 11 at the right end of the drive box 1, and one end of the chain 3 is connected to a lifting arm (not shown in the figure, which is used to carry materials), and the other end is connected to a counterweight (not shown in the figure) that balances the lifting arm, thus forming an electric lifting structure. When the drive motor 2 rotates, the first rotating shaft 11 engaged with it rotates, and the drive gears 12 rotate synchronously with the first rotating shaft 11 to drive the chains 3 to move left and right on the two rotating shafts, thereby achieving the purpose of alternating lifting of the lifting arm and the counterweight fixed at the two ends of the chains 3 by driving the chains 3 with the motor 2.

[0019] As shown in Figure 1 The second rotating shaft 17 is provided with two positioning bearings 13, which are rotatably connected to the second rotating shaft 17, and the two chains 3 are respectively clamped on the two positioning bearings 13.

[0020] The positioning bearings 13 are fixed in position on the second rotating shaft 17, and the two chains 3 are respectively clamped on the two positioning bearings 13 on the second rotating shaft 17 at the left end of the drive box 1. The positioning bearings 13 are provided with protrusions in the middle of the outer periphery, which are tightly matched with the recessed parts in the middle of the chains 3, achieving the purpose of limiting the chains 3 and preventing the chains 3 from slipping on the second rotating shaft 17. Moreover, the positioning bearings 13 can rotate flexibly on the second rotating shaft 17, thereby reducing the friction when the chains 3 move and reducing the energy consumption of the drive motor 2.

[0021] As shown in Figure 1 The drive box 1 is also provided with two chain boxes 14, which are fixed in the drive box through fixing rods.

[0022] The chain box 14, the chain 3, the positioning bearing 13 and the driving gear 12 correspond to each other, are kept in a straight line and are perpendicular to the two rotating shafts, ensure that the chain 3 moves along the straight line on the two rotating shafts, and further ensure that the chain 3 only bears the horizontal and vertical forces when bearing, thereby avoiding the chain 3 from being broken due to the lateral force. The chain box 14 is fixed between the two rotating shafts along the length direction of the chain 3 and is kept at a proper height, so as to ensure that the chain box 14 does not rub against the chain 3. The length of the chain box 14 is not particularly limited, and is preferably slightly shorter than the distance between the positioning bearing 13 and the driving gear 12 opposite to the positioning bearing 13, so as to prevent the chain 3 from being damaged and corroded to the maximum extent.

[0023] As shown in Figure 1 , the driving motor 2 is a speed reduction motor.

[0024] The speed reduction motor is adopted to drive the first rotating shaft 11, so as to avoid the chain 3 from moving too fast due to the too high rotating speed of the motor. On the one hand, it is difficult to ensure the lifting precision of the chain 3 when the chain 3 moves too fast. On the other hand, when the driving motor 2 is started instantaneously, if the rotating speed is too high, the chain 3 is easily damaged due to the too large instantaneous bearing force, thereby affecting the service life of the chain 3.

[0025] As shown in Figure 1 and Figure 2 , the first rotating shaft 11 and the second rotating shaft 17 are rotatably connected to the driving box 1 through the bearing seat 15 at both ends.

[0026] The two rotating shafts are rotatable relative to the driving box 1. By arranging the bearing seat 15, the friction between the two rotating shafts and the driving box 1 and the energy consumption of the driving motor 2 can be reduced, and the friction loss between the components can be reduced, thereby prolonging the service life of the components.

[0027] As shown in Figure 1 , the driving box 1 is further provided with a plurality of reinforcing plates 16, and the plurality of reinforcing plates 16 are fixedly connected to the inner walls on the opposite sides of the driving box 1.

[0028] The chain 3 bears a large load when the electric lifting device of the lifting arm is working. By fixedly connecting the two side walls of the driving box 1 through the plurality of reinforcing plates 16, the bearing capacity of the driving box 1 is strengthened, so as to avoid the driving box 1 from being scattered and broken.

[0029] When the electric lifting device of the lifting arm is working, the power switch is turned on, the driving motor 2 is rotated, the first rotating shaft 11 engaged with the gear of the driving motor 2 is synchronously rotated, the driving gear 12 is synchronously rotated with the first rotating shaft 11, the chain 3 is moved left and right on the two rotating shafts, the lifting arm and the counterweight are fixedly connected to the left and right ends of the chain 3 respectively, the chain 3 pulls the counterweight to move up and down, when the chain 3 pulls the counterweight to move up, the lifting arm moves down, when the chain 3 pulls the counterweight to move down, the lifting arm moves up, the moving directions of the lifting arm and the counterweight are always opposite, the clamping jaw is arranged on the lifting arm, the clamping jaw grabs the material with the lifting of the lifting arm, then the driving motor 2 drives the chain 3 to move again, in the same way, the chain 3 pulls the counterweight to move down or up, then the lifting arm moves up or down, then the clamping jaw on the lifting arm places the material to the designated position, the material carrying is completed through the reciprocating circulation, and the power is turned off after the carrying is completed.

[0030] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "middle" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The above-described embodiments are only preferred embodiments of the present application, and do not limit the scope of the present application, and various modifications and improvements of the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. An electric lifting device for a hoisting arm, characterized in that: Including drive box, drive motor and chain, the chain is equipped with two, the drive box is equipped with two rotating shafts for supporting and driving the chain, two rotating shafts are respectively first rotating shaft and second rotating shaft, two drive gears are fixedly arranged on the first rotating shaft for driving the chain to move, two chains are laid on two rotating shafts and are respectively engaged with two drive gears, the drive motor is fixedly arranged on the outer wall of the drive box, the output end of the drive motor is engaged with the first rotating shaft gear, and the chain moves with the first rotating shaft rotating driven by the drive motor.

2. A power hoist for raising and lowering a boom as claimed in claim 1, wherein: Two positioning bearings are arranged on the second rotating shaft, the positioning bearings are rotatably connected with the second rotating shaft, and the two chains are respectively clamped on the two positioning bearings.

3. A power hoist for raising and lowering a boom as claimed in claim 2 wherein: The drive box is also provided with two chain boxes, and the two chain boxes are fixed in the drive box by a fixed rod.

4. A power hoist for raising and lowering a boom as defined in claim 3, wherein: The drive motor is a speed reducer.

5. A power hoist for raising and lowering a boom as defined in claim 4, wherein: Both ends of the first rotating shaft and the second rotating shaft are rotatably connected to the drive box through a bearing seat.

6. A power lift for a boom as defined in claim 1, wherein: The drive box is also provided with a plurality of reinforcing plates, and the plurality of reinforcing plates are fixedly connected to the inner walls on the opposite sides of the drive box.

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