Electric cylinder suitable for double-electric-cylinder lifting overhead working truck

Abstract

The utility model discloses an electric cylinder suitable for a double-electric-cylinder lifting overhead working truck, which comprises a motor, a speed reducer and a movement unit, the speed reducer is in transmission connection with the motor, the movement unit is connected with the speed reducer, and when the motor is started, the movement unit can move through transmission of the speed reducer; the transmission assembly is connected with the speed reducer; and the potentiometer is connected with the transmission assembly. The potentiometers and the transmission assemblies are arranged on the electric cylinders, the potentiometers can detect the number of rotation turns of the lead screws and feed back the number of rotation turns to the controller, the two electric cylinders of the lifting overhead working truck can be synchronously controlled, and therefore the movement strokes of the two electric cylinders can be more accurately controlled; the platform surface stability of the lifting overhead working truck is improved, the lifting speed of the lifting overhead working truck is increased, noise is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric cylinders, in particular to an electric cylinder suitable for a double-electric cylinder lifting aerial work vehicle. Background Art

[0002] A lifting aerial work vehicle is a vehicle that can lift up and down to operate by controlling multiple hydraulic cylinders with a hydraulic or electric system. It is mainly divided into types: scissor lift, folding arm lift, self-propelled lift, telescopic arm lift. At present, most of the purely electrically controlled scissor lifts use a single electric cylinder for lifting and lowering, and the height of the lifting platform is generally low. Scissor lifts with higher meters currently use a double cylinder lifting and lowering method. In addition, the existing double-cylinder scissor lifts often have a situation where the double cylinders are out of sync during the lifting process, resulting in unstable operation of the work vehicle and even safety accidents. Moreover, double-cylinder scissor lifts generally have problems such as tilted tabletops, slow lifting speeds, loud noises, and high maintenance costs. Whether it is the loss of the internal seals of the cylinder or the loss of the oil pipe, it will cause uneven force on the cylinder, resulting in platform swing or tilt of the tabletop. Utility Model Content

[0003] The utility model aims to solve one of the technical problems existing in the prior art.

[0004] To this end, the utility model provides an electric cylinder suitable for a dual-electric cylinder lifting aerial work vehicle. By configuring a potentiometer on the electric cylinder and connecting the potentiometer to a control system, the synchronization between the two electric cylinders in the lifting aerial work vehicle can be improved.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an electric cylinder suitable for a dual-electric cylinder lifting aerial work vehicle, comprising: a motor, a reducer, and a motion unit, wherein the reducer is transmission-connected to the motor, and the motion unit is connected to the reducer, and when the motor is started, the motion unit can be moved through the transmission of the reducer; a transmission component, wherein the transmission component is connected to the reducer; and a potentiometer, wherein the potentiometer is connected to the transmission component.

[0006] Furthermore, the transmission assembly includes: a worm and a worm wheel, the worm is connected to the reducer, the worm wheel is meshed with the worm for transmission, and the worm wheel is connected to the rotating shaft of the potentiometer.

[0007] Furthermore, the transmission assembly includes: a connecting shaft, a feedback gear, a gear set and a ring gear, the connecting shaft is connected to the reducer, the feedback gear is sleeved on the connecting shaft, the gear set is meshed with the feedback gear for transmission, the ring gear is meshed with the gear set for transmission, and the ring gear is connected to the rotating shaft of the potentiometer.

[0008] Furthermore, the electric cylinder also includes: a step-down power supply board, and the step-down power supply board is connected to the potentiometer.

[0009] Furthermore, the potentiometer is a resistor feedback type potentiometer.

[0010] Furthermore, the potentiometer is a voltage feedback potentiometer.

[0011] Furthermore, the gear set includes: a front cover plate, a first-stage gear, a second-stage gear, a third-stage gear and a rear cover plate, the first-stage gear, the second-stage gear and the third-stage gear are all located between the front cover plate and the rear cover plate, the first-stage gear is meshed with the feedback gear, the second-stage gear is meshed with the first-stage gear, the third-stage gear is meshed with the second-stage gear, and the ring gear is meshed with the third-stage gear.

[0012] Furthermore, the reducer includes: a front housing, a rear housing and a reduction gear, the front housing and the rear housing are connected to form a accommodating space, the reduction gear is arranged in the accommodating space, the reduction gear is connected to the motion unit, and the reduction gear is connected to the transmission assembly.

[0013] Furthermore, a potentiometer mounting plate is provided on a side of the rear housing away from the reduction gear, and the potentiometer is mounted on the potentiometer mounting plate.

[0014] Furthermore, a protective cover is connected to the rear shell.

[0015] The beneficial effect of the utility model is that the electric cylinder of the utility model, by arranging a potentiometer and a transmission assembly on the electric cylinder, the potentiometer can detect the number of rotations of the screw rod and feed back to the controller, so that the two electric cylinders of the lifting aerial work vehicle can be controlled synchronously, thereby being able to more accurately control the movement stroke of the two electric cylinders, which is beneficial to improving the stability of the table top of the lifting aerial work vehicle, increasing the lifting speed of the lifting aerial work vehicle, reducing noise, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of the electric cylinder of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the transmission assembly of the first embodiment of the utility model.

[0019] Figure 3 It is a structural schematic diagram of a step-down power supply board in Embodiment 2 of the present utility model.

[0020] Figure 4It is a structural schematic diagram of the transmission assembly of the third embodiment of the utility model.

[0021] Figure 5 It is an exploded view of the transmission assembly of the third embodiment of the present utility model.

[0022] Figure 6 It is a structural schematic diagram of a step-down power supply board of the fourth embodiment of the utility model.

[0023] In the figure: 1. reducer; 2. motion unit; 3. transmission assembly; 4. potentiometer; 5. step-down power supply board; 6. potentiometer mounting plate; 7. protective cover; 8. wiring harness connector; 11. front housing; 12. rear housing; 13. reduction gear; 31. worm; 32. worm wheel; 33. connecting shaft; 34. feedback gear; 35. gear set; 36. ring gear; 351. front cover; 352. first-stage gear; 353. second-stage gear; 354. third-stage gear; 355. rear cover. DETAILED DESCRIPTION

[0024] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0025] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1

[0028] like Figure 1 and Figure 2 As shown, the electric cylinder of this embodiment includes: a motor, a reducer 1, a motion unit 2, a transmission assembly 3 and a potentiometer 4. The reducer 1 is connected to the motor in a transmission manner, and the motion unit 2 is connected to the reducer 1. When the motor is started, the motion unit 2 can be moved through the reducer 1. The transmission assembly 3 is connected to the reducer 1, and the potentiometer 4 is connected to the transmission assembly 3.

[0029] The reducer 1 includes: a front housing 11, a rear housing 12 and a reduction gear 13. The front housing 11 is connected to the rear housing 12 to form a storage space. The reduction gear 13 is arranged in the storage space. The reduction gear 13 is connected to the motion unit 2, and the reduction gear 13 is connected to the transmission assembly 3. A potentiometer mounting plate 6 is provided on the side of the rear housing 12 away from the reduction gear 13, and the potentiometer 4 is mounted on the potentiometer mounting plate 6. A protective cover 7 is also connected to the rear housing 12. A wiring harness connector 8 is also provided on the rear housing 12, and the potentiometer 4 is connected to the controller through the wiring harness connector 8. The connecting wire at one end of the wiring harness connector 8 passes through the protective cover 7 and is connected to the external controller. The protective cover 7 is used to protect the potentiometer 4 and the transmission assembly 3.

[0030] The motion unit 2 includes a screw assembly and a piston rod, and the reduction gear 13 is connected to the screw assembly. When the motor is started, the reduction gear 13 can drive the screw of the screw assembly to rotate. The rotation of the screw causes the nut of the screw assembly to move linearly, and the nut can drive the piston rod to move linearly, thereby realizing the extension and retraction of the electric cylinder.

[0031] In this embodiment, the transmission assembly 3 includes: a worm 31 and a worm wheel 32, the worm 31 is connected to the reducer 1, the worm wheel 32 is meshed with the worm 31 for transmission, and the worm wheel 32 is connected to the rotating shaft of the potentiometer 4. The worm 31 is connected to the reduction gear 13. When the electric cylinder is working, the reduction gear 13, the lead screw and the worm 31 rotate synchronously. At this time, the rotation of the worm 31 will be transmitted to the potentiometer 4 through the worm wheel 32. That is, the potentiometer 4 can detect the number of rotations of the worm 31, and the number of rotations of the worm 31 is the same as the number of rotations of the lead screw. In this embodiment, the potentiometer 4 is a resistor feedback type potentiometer. The number of rotations detected by the potentiometer 4 can be converted into a resistance value for the controller. The potentiometer 4 sends the resistance value to the controller, and the controller can obtain the real-time motion stroke of the electric cylinder.

[0032] Embodiment 2

[0033] like Figure 3As shown, the difference between this embodiment and the first embodiment is that the potentiometer 4 is a voltage feedback type potentiometer, and the electric cylinder further includes a step-down power supply board 5, which is connected to the potentiometer 4. The step-down power supply board 5 can adapt to the voltage of different working vehicles, and the potentiometer 4 does not need to be connected to other voltages. The voltage on the working vehicle can be converted into the voltage required by the potentiometer 4 after passing through the step-down power supply board 5.

[0034] Embodiment 3

[0035] like Figure 4 and Figure 5 As shown, the difference between this embodiment and the first embodiment is that the transmission assembly 3 includes a connecting shaft 33, a feedback gear 34, a gear set 35 and a ring gear 36, the connecting shaft 33 is connected to the reducer 1, the feedback gear 34 is sleeved on the connecting shaft 33, the gear set 35 is meshed with the feedback gear 34 for transmission, the ring gear 36 is meshed with the gear set 35 for transmission, and the ring gear 36 is fixedly connected to the rotating shaft of the potentiometer 4. The gear set 35 includes a front cover plate 351, a primary gear 352, a secondary gear 353, a tertiary gear 354 and a rear cover plate 355, the primary gear 352, the secondary gear 353 and the tertiary gear 354 are all located between the front cover plate 351 and the rear cover plate 355, the primary gear 352 is meshed with the feedback gear 34, the secondary gear 353 is meshed with the primary gear 352, the tertiary gear 354 is meshed with the secondary gear 353, and the ring gear 36 is meshed with the tertiary gear 354.

[0036] That is to say, the connecting shaft 33 is connected to the reduction gear 13. When the electric cylinder is working, the reduction gear 13, the connecting shaft 33 and the lead screw rotate synchronously. When the connecting shaft 33 rotates, it drives the gear set 35 to transmit, and then drives the rotating shaft of the potentiometer 4 to rotate through the ring gear 36. The potentiometer 4 can detect the number of rotations of the connecting shaft 33, and the number of rotations can be converted into a resistance value and sent to the controller, so that the controller can obtain the real-time motion stroke of the electric cylinder.

[0037] When the aerial work vehicle is lifted back and forth, a transmission structure of a worm 31 and a worm wheel 32 is used. Due to the existence of backlash, the value of the potentiometer 4 may fluctuate, which in turn causes the movement stroke error of the dual electric cylinder to exceed an acceptable range. Therefore, this embodiment uses a gear transmission structure to improve the deficiencies of the worm wheel 32 and the worm 31, which is beneficial to improving the stability of the feedback of the potentiometer 4.

[0038] Embodiment 4

[0039] like Figure 6As shown, the difference between this embodiment and the third embodiment is that the potentiometer 4 is a voltage feedback type potentiometer, and the electric cylinder further includes a step-down power supply board 5, which is connected to the potentiometer 4. The step-down power supply board 5 can adapt to the voltage of different working vehicles, and the potentiometer 4 does not need to be connected to other voltages. The voltage on the working vehicle can be converted into the voltage required by the potentiometer 4 after passing through the step-down power supply board 5.

[0040] To sum up, the electric cylinder of the utility model, by arranging a potentiometer 4 on the electric cylinder, the potentiometer 4 can detect the number of rotations of the screw rod and feed back to the controller, so that the two electric cylinders of the lifting aerial work vehicle can be controlled synchronously, thereby being able to more accurately control the movement stroke of the two electric cylinders, which is beneficial to improving the stability of the table of the lifting aerial work vehicle, increasing the lifting speed of the lifting aerial work vehicle, reducing noise, and reducing maintenance costs.

[0041] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electric cylinder suitable for a dual electric cylinder lifting aerial work vehicle, characterized in that: include: A motor, a reducer (1), and a motion unit (2), wherein the reducer (1) is connected to the motor in a transmission manner, and the motion unit (2) is connected to the reducer (1), so that when the motor is started, the motion unit (2) can be moved through the transmission of the reducer (1); A transmission assembly (3), the transmission assembly (3) being connected to the reducer (1); A potentiometer (4), the potentiometer (4) being connected to the transmission assembly (3); The transmission assembly (3) comprises: a worm (31) and a worm wheel (32), wherein the worm (31) is connected to the reducer (1), the worm wheel (32) is meshed with the worm (31) for transmission, and the worm wheel (32) is connected to the rotating shaft of the potentiometer (4); Alternatively, the transmission assembly (3) comprises: a connecting shaft (33), a feedback gear (34), a gear set (35) and a ring gear (36); the connecting shaft (33) is connected to the reducer (1); the feedback gear (34) is sleeved on the connecting shaft (33); the gear set (35) and the feedback gear (34) are meshed for transmission; the ring gear (36) and the gear set (35) are meshed for transmission; and the ring gear (36) is connected to the rotating shaft of the potentiometer (4).

2. The electric cylinder suitable for a dual electric cylinder lifting aerial work vehicle as claimed in claim 1, characterized in that: The electric cylinder further comprises: a step-down power supply board (5), wherein the step-down power supply board (5) is connected to the potentiometer (4).

3. The electric cylinder suitable for a dual electric cylinder lifting aerial work vehicle as claimed in claim 2, characterized in that: The potentiometer (4) is a resistor feedback type potentiometer.

4. The electric cylinder suitable for a dual electric cylinder lifting aerial work vehicle as claimed in claim 2, characterized in that: The potentiometer (4) is a voltage feedback type potentiometer.

5. The electric cylinder suitable for a dual electric cylinder lifting aerial work vehicle as claimed in claim 1, characterized in that: The gear set (35) comprises: a front cover plate (351), a first-stage gear (352), a second-stage gear (353), a third-stage gear (354) and a rear cover plate (355); the first-stage gear (352), the second-stage gear (353) and the third-stage gear (354) are all located between the front cover plate (351) and the rear cover plate (355); the first-stage gear (352) meshes with the feedback gear (34); the second-stage gear (353) meshes with the first-stage gear (352); the third-stage gear (354) meshes with the second-stage gear (353); and the ring gear (36) meshes with the third-stage gear (354).

6. The electric cylinder suitable for a dual electric cylinder lifting aerial work vehicle as claimed in claim 1, characterized in that: The reducer (1) comprises: a front housing (11), a rear housing (12) and a reduction gear (13); the front housing (11) and the rear housing (12) are connected to form a receiving space; the reduction gear (13) is arranged in the receiving space; the reduction gear (13) is connected to the motion unit (2); and the reduction gear (13) is connected to the transmission assembly (3).

7. The electric cylinder suitable for a dual electric cylinder lifting aerial work vehicle as claimed in claim 6, characterized in that: A potentiometer mounting plate (6) is provided on a side of the rear housing (12) away from the reduction gear (13), and the potentiometer (4) is mounted on the potentiometer mounting plate (6).

8. The electric cylinder suitable for a dual electric cylinder lifting aerial work vehicle as claimed in claim 6, characterized in that: The rear housing (12) is also connected to a protective cover (7).

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