Electric hoist and hoisting equipment

Abstract

The embodiment of the utility model provides an electric hoist and hoisting equipment. The electric hoist comprises a motor, a lifting device and a driving device, the speed reducer comprises a planetary transmission structure, and the planetary transmission structure comprises a center wheel and three planet wheels; the transmission shaft is connected with the motor and the speed reducer and penetrates through the center wheel; wherein the motor drives the transmission shaft to rotate, the transmission shaft drives the center wheel to rotate, and the three planet wheels revolve around the center wheel while rotating. According to the electric hoist provided by the embodiment of the invention, the transmission efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of cranes, and particularly to an electric hoist and a lifting device. Background Art

[0002] An electric hoist is an electric lifting device that realizes lifting and moving heavy objects through motor drive. The transmission efficiency of an electric hoist refers to the ratio of the motor output power to the power required to actually lift the heavy object during the operation of the electric hoist. The level of transmission efficiency directly affects the energy consumption and working performance of the electric hoist. In this context, how to provide a new structure for an electric hoist to improve the transmission efficiency of the electric hoist has become an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0003] In view of this, the embodiments of the present application provide an electric hoist and a lifting device, which can improve the transmission efficiency of the electric hoist.

[0004] To achieve the above object, the embodiments of the present application provide the following technical solutions.

[0005] In a first aspect, the embodiments of the present application provide an electric hoist, including:

[0006] A motor;

[0007] A speed reducer, the speed reducer includes a planetary transmission structure, and the planetary transmission structure includes a central gear and three planetary gears;

[0008] A transmission shaft, the transmission shaft connects the motor and the speed reducer and passes through the central gear;

[0009] Wherein, the motor drives the transmission shaft to rotate, the transmission shaft drives the central gear to rotate, and the three planetary gears rotate around the central gear while rotating on their own axes.

[0010] Optionally, the planetary transmission structure further includes: a planet carrier for supporting the planetary gears and screws; the planetary gears are axially fixed to the planet carrier through the screws with the screws as axes.

[0011] Optionally, the central axis of the planet carrier is aligned with the central axis of the central gear, and the planetary gears on the planet carrier revolve around the central gear.

[0012] Optionally, the three planetary gears are evenly distributed on the planet carrier around the central gear and are respectively meshed with the central gear.

[0013] Optionally, it further includes: a speed reducer output shaft for outputting power, and the speed reducer output shaft is connected to the planet carrier;

[0014] Among them, the rotation of the central gear drives the rotation of the planetary gears, the power of the self-rotation and revolution of the planetary gears is transmitted to the planet carrier, and the planet carrier outputs power through the reducer output shaft connecting the planet carrier.

[0015] Optionally, it further includes: a hoisting wheel and a brake. The reducer is connected to the hoisting wheel through the reducer output shaft, and the transmission shaft passes through the inside of the reducer output shaft and is connected to the brake.

[0016] Optionally, the motor, the reducer, the hoisting wheel and the brake are arranged on the same axis.

[0017] Optionally, the planetary transmission structure further includes: an internal gear ring located outside the three planetary gears, and the internal teeth of the internal gear ring mesh with the external teeth of the planetary gears;

[0018] Among them, the number of teeth of the central gear is less than the number of teeth of the internal gear ring.

[0019] Optionally, it further includes: a motor output shaft; the motor output shaft is connected to the transmission shaft, and the motor drives the transmission shaft to rotate through the motor output shaft.

[0020] In a second aspect, an embodiment of the present application provides a hoisting device, and the hoisting device at least includes the electric hoist as described above.

[0021] The electric hoist provided by the embodiment of the present application includes: a motor; a reducer, the reducer includes a planetary transmission structure, and the planetary transmission structure includes a central gear and three planetary gears; a transmission shaft, the transmission shaft connects the motor and the reducer and passes through the central gear; among them, the motor drives the transmission shaft to rotate, the transmission shaft drives the central gear to rotate, and then the three planetary gears revolve around the central gear while rotating; it can be seen that the electric hoist provided by the embodiment of the present application realizes the meshing and transmission of multiple planetary gears and the central gear by setting a planetary transmission structure reducer with three planetary gears, has a compact structure, can realize speed reduction and increase the transmission ratio in a limited space, thereby improving the transmission efficiency of the entire electric hoist. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0023] Figure 1 It is a structural example diagram of the electric hoist shown in the embodiment of the present application;

[0024] Figure 2 It is another structural example diagram of the electric hoist shown in the embodiments of the present application. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0026] An electric hoist is an electric lifting device. Due to its characteristics such as simple operation and high efficiency, it is widely used in many fields such as industrial production and logistics handling. The electric hoist mainly realizes the lifting and moving of heavy objects through the drive of the motor. The transmission efficiency of the electric hoist refers to the ratio of the power output by the motor to the power required to actually lift the heavy object during the working process of the electric hoist. The level of the transmission efficiency directly affects the energy consumption and working performance of the electric hoist.

[0027] An electric hoist adopts an expanded cylindrical gear transmission structure. The expanded cylindrical gear transmission structure is composed of multiple gears of different sizes and is arranged in a certain order to form an expanded transmission chain. Although this transmission structure can achieve the transmission function, it may cause the overall lateral dimension of the electric hoist to be relatively large, with a relatively large volume and mass, thereby resulting in a reduction in transmission efficiency.

[0028] Another electric hoist adopts a coaxial cylindrical gear transmission structure. In the coaxial cylindrical gear rotation structure, all the gears are aligned with the axis of the motor, that is, the rotation centers of all the gears are on the same straight line. Although this transmission structure can achieve the transmission function, it may cause the axial dimension to be relatively large, affecting the transmission stability and load-bearing capacity, resulting in a reduction in transmission efficiency.

[0029] In view of this, the embodiments of the present application provide a new structure for an electric hoist. A reducer with a planetary transmission structure can be set in the electric hoist, and the transmission is carried out through the meshing of multiple planetary gears with the central gear and the internal gear ring in the reducer, so as to increase the transmission ratio and further improve the transmission efficiency of the electric hoist.

[0030] Figure 1 It is a structural example diagram of the electric hoist shown in the embodiments of the present application, Figure 2 It is another structural example diagram of the electric hoist provided by the embodiments of the present application, wherein, Figure 2 is based on Figure 1 the sectional structure diagram in the direction of the dashed line in. Refer to Figure 1 and Figure 2 , the electric hoist includes:

[0031] Motor 110;

[0032] Reducer 120, the reducer 120 includes a planetary transmission structure (not labeled in the figure), and the planetary transmission structure includes a central gear 121 and three planetary gears 123;

[0033] Drive shaft 111, the drive shaft 111 connects the motor 110 and the reducer 120 and passes through the central gear 121; wherein, the motor 110 drives the drive shaft 111 to rotate, the drive shaft 111 drives the central gear 121 to rotate, and the three planetary gears 123 rotate around the central gear 121 while rotating on their own axes.

[0034] In an alternative implementation, the planetary transmission structure further includes: a motor output shaft 112 and a reducer output shaft 124 for outputting power; the motor output shaft 112 is connected to the drive shaft 111, and the motor 110 drives the drive shaft 111 to rotate through the motor output shaft 112.

[0035] The motor 110, as the main power source of the electric hoist, can provide power for the transmission of the entire electric hoist through the motor output shaft 112, convert its electrical energy into mechanical energy to drive the lifting equipment. At the same time, the speed of the motor output shaft 112 can be adjusted through the motor, thereby adjusting the speeds of the drive shaft 111 and the central gear 121 connected to the motor output shaft 112.

[0036] In the embodiment of the present application, the motor 110 can be a three-phase asynchronous motor or a servo motor; in other embodiments, the motor 110 can also be a motor that can meet the load requirements and application scenario requirements of the electric hoist.

[0037] The reducer 120 is a power transmission device that can convert the high-speed motion input to the reducer by the motor output shaft into the low-speed motion of the reducer output shaft (that is, the function of the reducer is to convert the high-speed rotation of the motor into the low-speed motion suitable for lifting operations), and at the same time increase the torque to meet the power required for lifting heavy objects. Thus, the reducer enables the electric hoist to operate at a speed suitable for the load weight and lifting speed, ensuring the safety and efficiency of the operation.

[0038] In the embodiment of the present application, as an important structure for realizing lifting operations, if the transmission ratio or transmission efficiency of the reducer is low, it may cause the electric hoist to be unable to generate enough torque to lift heavy objects, thereby affecting the operation efficiency and even being unable to work properly under heavy load conditions. Therefore, it is necessary to set a transmission structure in the reducer that can increase the transmission ratio and transmission efficiency, so that the electric hoist can perform lifting operations efficiently and stably, while reducing energy loss and lowering energy consumption.

[0039] In the embodiments of the present application, by arranging a planetary transmission structure in the speed reducer for transmission, the transmission ratio and transmission efficiency of the electric hoist can be improved.

[0040] In the embodiments of the present application, the planetary transmission structure can achieve a high reduction ratio within a compact size by utilizing the meshing of three planetary gears with the central gear and the internal gear ring, thereby saving space and reducing the volume and mass of the entire electric hoist; at the same time, since the planetary transmission structure has multiple teeth meshing, the transmission efficiency can be improved and energy loss can be reduced.

[0041] The central gear 121, also known as the sun gear, is located at the central position in the planetary transmission structure, and is used to receive the power of the transmission shaft connected to the output shaft of the motor and rotate, and then the central gear transmits the power to the entire planetary transmission structure through rotation.

[0042] In an alternative implementation, the planetary transmission structure further includes: a planet carrier 125 for supporting the planetary gears and screws 1231; the planetary gears 123 can be fixed to the planet carrier 125 with the screws 1231 as the axis.

[0043] The planet carrier 125 is a component for supporting the planetary gears. The planet carrier can be in a disk shape or a frame structure. In the embodiments of the present application, the central axis of the planet carrier 125 is aligned with the central axis of the central gear 121. Thus, the planetary gears fixed to the planet carrier can revolve around the central gear 121 while rotating around the screws 1231, and at the same time mesh with the internal gear ring to transmit torque and achieve speed reduction and torque increase.

[0044] In the embodiments of the present application, the planetary transmission structure adopts a design with three planetary gears. The three planetary gears can transmit power more effectively, reduce the load on a single gear, thereby reducing wear and improving the transmission efficiency. At the same time, the three planetary gears provide better structural stability and can form a stable support structure, which helps to achieve uniform load and reduce vibration.

[0045] In an alternative implementation, the three planetary gears 123 can be evenly distributed on the planet carrier 125 around the central gear 121 and respectively mesh with the central gear 121.

[0046] In the embodiments of the present application, the planetary gears 123 are installed on the planet carrier 125 around the central gear and are evenly distributed, which can enable the load to be evenly transmitted to each planetary gear, thereby improving the transmission efficiency and load-bearing capacity of the electric hoist.

[0047] Further, the output shaft 124 of the speed reducer can be connected to the planet carrier 125. Then, the planet carrier can aggregate the rotational movements of all the planet gears and output the power to the output shaft 124 of the speed reducer, thereby transmitting the power after transmission and deceleration to the hoisting wheel to achieve smooth lifting or lowering of heavy objects.

[0048] In the embodiment of the present application, the motor 110 provides power, and drives the transmission shaft 111 connected to the motor output shaft 112 to rotate through the motor output shaft 112; the transmission shaft 111 is connected to the speed reducer 120 and passes through the central gear 121 inside the speed reducer 120 to drive the central gear 121 to rotate; the central gear 121 drives the three planet gears 123 meshing with the central gear to revolve around the central gear 121 while rotating; the planet gears 123 transmit the power of rotation and revolution to the planet carrier 125 fixedly connected to the planet gears; then, the planet carrier 125 outputs the decelerated power through the output shaft 124 of the speed reducer connected to the planet carrier 125.

[0049] Further, the planetary transmission structure further includes: an internal gear ring 126 located outside the three planet gears 123.

[0050] The internal gear ring 126 is a gear with internal teeth. In the embodiment of the present application, the internal teeth of the internal gear ring mesh with the external teeth of the planet gears, which helps to transmit torque and achieve deceleration. Among them, the internal gear ring 126 is fixedly connected to the first end cover 1261, and the first end cover 1261 can fix the internal gear ring 126 in place to ensure that it does not move axially or radially. Further, the speed reducer further includes a second end cover 1262. The first end cover 1261 and the second end cover 1262 are fixed and enclosed outside the speed reducer to provide structural support for the speed reducer, forming a sealed space, which helps to keep the internal gears clean.

[0051] In the embodiment of the present application, the internal gear ring can be fixed or connected to the planet carrier, and the number of teeth of the central gear can be less than the number of teeth of the internal gear ring, so as to achieve deceleration and increase torque when meshing with the planet gears.

[0052] In an alternative implementation, bearings 127 can be provided in the speed reducer. The bearings 127 can provide stable support, withstand the axial and radial loads generated by the motor, and ensure the stable rotation of the transmission shaft; at the same time, reduce the friction between the motor output shaft, the transmission shaft, and the gears, etc., reduce energy loss, and improve transmission efficiency.

[0053] In an alternative implementation, refer to Figure 1 and Figure 2, the electric hoist further includes: a hoisting wheel 130 and a brake 140. The speed reducer 120 can be connected to the hoisting wheel 130 through a speed reducer output shaft 124, and the transmission shaft 111 passes through the inside of the speed reducer output shaft 124 and is connected to the brake 140.

[0054] The hoisting wheel 130 is the core component in the electric hoist that realizes the function of lifting and lowering heavy objects. It is also called a drum or a hook pulley. The hoisting wheel can transmit the power of the motor 110 and the speed reducer 120 to the hook by winding a steel wire rope to realize the lifting or lowering of heavy objects.

[0055] The brake 140 is an important safety device used to stabilize heavy objects during the lifting or lowering process. It can quickly stop the operation of the electric hoist when needed to prevent accidental sliding or falling, thus ensuring the safety and accuracy of the operation.

[0056] In the embodiment of the present application, the hoisting wheel can be controlled by the speed reducer output shaft after deceleration, while the brake can be controlled by the transmission shaft without deceleration. Furthermore, the speed reducer output shaft is responsible for transmitting the power that has been reduced in speed and increased in torque by the speed reducer to drive the hoisting wheel to smoothly lift or lower heavy objects. The brake is responsible for safety control. When an emergency stop or load stabilization is required, the brake can quickly respond through the transmission shaft, act on the transmission shaft quickly, and immediately stop the power transmission to ensure safety.

[0057] In the embodiment of the present application, the motor 110, the speed reducer 120, the hoisting wheel 130, and the brake 140 can be arranged on the same axis, which can reduce the required space, make the layout of the entire electric hoist more compact, simplify the design, reduce the weight of the whole machine, and thus improve stability. At the same time, arranging the above structures on the same axis can reduce additional transmission losses and improve transmission efficiency.

[0058] It can be seen that the electric hoist provided by the embodiment of the present application realizes the meshing and transmission of multiple planetary gears with a central gear by setting a planetary gear transmission structure speed reducer with three planetary gears. The structure is compact, and it can realize speed reduction and increase the transmission ratio within a limited space, thereby improving the transmission efficiency of the entire electric hoist.

[0059] The embodiment of the present application also provides a lifting device, which at least includes the electric hoist as described in the foregoing embodiment.

[0060] The above describes multiple embodiment solutions provided by the embodiment of the present application. The optional ways described in each embodiment solution can be combined and cross-referenced with each other without conflict, thereby extending multiple possible embodiment solutions, and all of these can be considered as the embodiment solutions disclosed and made public by the embodiment of the present application.

[0061] Although the embodiments of the present application are disclosed as above, the present application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims.

Claims

1. An electric hoist, characterized in that: include: Motor; A reducer, the reducer comprising a planetary transmission structure, the planetary transmission structure comprising a central gear and three planetary gears; A transmission shaft, the transmission shaft connects the motor and the reducer and passes through the central wheel; The motor drives the transmission shaft to rotate, the transmission shaft drives the center wheel to rotate, and the three planetary wheels revolve around the center wheel while rotating.

2. The electric hoist according to claim 1, characterized in that: The planetary transmission structure further includes: a planetary frame and screws for supporting planetary wheels; the planetary wheels are fixed to the planetary frame by the screws with the screws as axes.

3. The electric hoist according to claim 2, characterized in that: The central axis of the planet carrier is aligned with the central axis of the center wheel, and the planet wheels on the planet carrier revolve around the center wheel.

4. The electric hoist according to claim 3, characterized in that: The three planetary gears are evenly distributed on the planetary carrier around the central gear and are meshed with the central gear respectively.

5. The electric hoist according to claim 4, characterized in that: Also includes: A reducer output shaft for outputting power, wherein the reducer output shaft is connected to the planet carrier; The rotation of the central wheel drives the planetary wheels to rotate, and the power of the rotation and revolution of the planetary wheels is transmitted to the planetary carrier, and the planetary carrier outputs power through the output shaft of the reducer connected to the planetary carrier.

6. The electric hoist according to claim 1, characterized in that: Also includes: A lifting wheel and a brake, the reducer is connected to the lifting wheel through a reducer output shaft, and the transmission shaft passes through the interior of the reducer output shaft and is connected to the brake.

7. The electric hoist according to claim 6, characterized in that: The motor, reducer, lifting wheel and brake are arranged on the same axis.

8. The electric hoist according to claim 1, characterized in that: The planetary transmission structure further comprises: an inner gear ring located at the periphery of the three planetary wheels, wherein the inner teeth of the inner gear ring mesh with the outer teeth of the planetary wheels; Wherein, the number of teeth of the central wheel is less than the number of teeth of the inner gear ring.

9. The electric hoist according to claim 1, characterized in that: Also includes: Motor output shaft; the motor output shaft is connected to the transmission shaft, and the motor drives the transmission shaft to rotate through the motor output shaft.

10. A lifting device, characterized in that: At least comprises the electric hoist as described in any one of claims 1-9.

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