Manual and electric chain hoist

Abstract

The utility model discloses a manual and electric chain hoist which comprises a shell, a five-tooth long shaft and a driving assembly. The five-tooth long shaft is rotationally installed on the shell and lifts a heavy object through rotation of the first side. The driving assembly is installed on the second side of the five-tooth long shaft, and the driving end of the driving assembly extends out of the shell. An actuating piece outside the shell drives the driving end in a manual or electric mode so as to drive the five-tooth long shaft to rotate. The lifting device has the beneficial effects that the driving assembly is driven by the external actuating piece to rotate the five-tooth long shaft, and the driving force arm can be adaptively changed according to the lifting requirement so as to improve the lifting capacity. Meanwhile, manual operation is changed into electric operation under the condition that the operation working condition of the chain hoist is not changed, the working efficiency can be effectively improved, the labor intensity can be effectively relieved, and meanwhile a traditional mechanism can be optimized.

Description

Technical Field

[0001] The present application relates to the technical field of lifting machinery, and in particular to a hand-operated electric chain hoist. Background Art

[0002] A hand chain hoist is a manual lifting machine that is easy to use and carry, also known as a "chain hoist" or "fall chain". Its structure mainly includes a five-tooth long shaft, a hand chain wheel, a ratchet pawl, a gear set and a lifting sprocket; the lifting sprocket is installed on one side of the five-tooth long shaft and meshes with the five-tooth long shaft through the gear set, and the ratchet pawl and the hand chain wheel are installed on the other side of the five-tooth long shaft. When lifting, the hand chain is pulled to drive the hand chain wheel to drive the five-tooth long shaft to rotate, and then the lifting sprocket is driven to rotate through the reduction transmission of the gear set. During the rotation of the lifting sprocket, the heavy object is lifted by the lifting chain.

[0003] From the above content, it can be seen that for heavy objects, the chain is mainly pulled manually; but for heavier objects, or when the transmission ratio of the gear set is not appropriate, a larger traction force is required for lifting the heavy object, which will increase the labor intensity of the operator. Based on this, it is now urgent to improve the traditional hand chain hoist. Utility Model Content

[0004] One of the purposes of the present application is to provide a hand-operated electric chain hoist that can solve at least one of the defects in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a hand-operated electric chain hoist, comprising a shell, a five-tooth long shaft and a drive assembly; the five-tooth long shaft is rotatably mounted on the shell, and the heavy object is lifted and lowered by rotating the first side; the drive assembly is mounted on the second side of the five-tooth long shaft and extends the drive end outside the shell; the actuator outside the shell drives the drive end manually or electrically to drive the five-tooth long shaft to rotate.

[0006] Preferably, the actuating member is a manual wrench, and the manual wrench drives the five-tooth long shaft to rotate manually.

[0007] Preferably, the actuator is an electric wrench, which is connected to the driving end in a handheld or fixed manner, and then drives the five-tooth long shaft to rotate in an electrically driven manner.

[0008] Preferably, the actuator is a motor, which is fixedly mounted outside the shell and connected to the driving end through an output end; the motor drives the five-tooth long shaft to rotate electrically under the power supply of a mobile power source installed outside the shell.

[0009] Preferably, a remote control receiver is also installed on the outside of the shell, and the remote control receiver is electrically connected to the mobile power supply. The remote control receiver is suitable for controlling the mobile power supply to supply power to the motor according to the received signal, and then controlling the lifting and lowering of the five-tooth long shaft for heavy objects.

[0010] Preferably, the drive assembly is threadedly engaged with the second side of the five-tooth long shaft; the hand-operated electric chain hoist also includes a traction assembly; the traction assembly is installed on the second side of the five-tooth long shaft; the drive assembly is suitable for axial movement under the drive of the actuator, thereby approaching and squeezing the traction assembly to frictionally engage with the five-tooth long shaft, or moving away from the traction assembly to disengage the traction assembly from the five-tooth long shaft.

[0011] Preferably, the traction assembly includes a friction plate, a ratchet and a pressure plate; the pressure plate is fixedly mounted on the five-tooth long shaft, the friction plate is slidably mounted on the five-tooth long shaft, the ratchet is slidably mounted on the five-tooth long shaft and is located between the pressure plate and the friction plate and cooperates with a pawl installed on the inner side of the shell; the friction plate is suitable for tightening the ratchet and the pressure plate under the axial extrusion of the drive assembly, and then driving the five-tooth long shaft to rotate with the drive assembly through friction cooperation.

[0012] Preferably, the driving assembly includes a connecting sleeve, which is threadedly connected to the second side of the five-tooth long shaft, and one end of the connecting sleeve extends to the outside of the shell to form the driving end; the connecting sleeve is suitable for squeezing or moving away from the traction assembly by spiral rotation relative to the five-tooth long shaft under the drive of the actuator.

[0013] Preferably, the driving assembly includes a main gear and a driven gear; the driven gear is threadedly connected to the second side of the five-tooth long shaft through a centrally arranged connecting sleeve; the main gear is rotatably mounted on the housing through a rotating shaft and meshes with the driven gear, and the end of the rotating shaft extending outside the housing forms the driving end; the main gear, driven by the actuator, drives the driven gear to perform a spiral rotation relative to the five-tooth long shaft to squeeze or move away from the traction assembly.

[0014] Preferably, the driving assembly includes a main gear and a gear plate; the gear plate is threadedly connected to the second side of the five-tooth long shaft through a connecting sleeve arranged in the center; the main gear is rotatably mounted on the housing through a rotating shaft and meshes with the inner gear ring of the gear plate, and the end of the rotating shaft extending outside the housing forms the driving end; the main gear, driven by the actuator, drives the gear plate to perform a spiral rotation relative to the five-tooth long shaft to squeeze or move away from the traction assembly.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] By driving the drive assembly to rotate the five-tooth long shaft through an external actuator, the driving force arm can be adaptively changed to increase the lifting capacity according to the lifting needs. At the same time, without changing the working conditions of the hand chain hoist, the manual operation is changed to electric operation, which can effectively improve work efficiency, reduce labor intensity, and optimize the traditional mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 For this utility model Figure 1 A schematic diagram of the exploded state of the internal structure of the shell in the illustrated embodiment.

[0019] Figure 3 For this utility model Figure 1 The internal structure schematic diagram of the embodiment shown is viewed from the front.

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

[0021] Figure 5 For this utility model Figure 4 A schematic diagram of the exploded state of the traction assembly in the illustrated embodiment.

[0022] Figure 6 For this utility model Figure 4 The internal structure schematic diagram of the embodiment shown is viewed from the front.

[0023] In the figure: housing 100, five-tooth long shaft 2, first gear shaft section 21, threaded section 22, optical shaft section 23, lifting sprocket 3, gear set 4, four-tooth short shaft 41, second gear shaft section 411, first gear 42, second gear 43, drive assembly 5, drive end 50, main gear 51, driven gear 52, connecting sleeve 521, motor 53, gear plate 54, mobile power supply 55, remote control receiver 56, traction assembly 6, friction plate 61, ratchet 62, pressure plate 63, pawl 64. DETAILED DESCRIPTION

[0024] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0027] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0028] One of the preferred embodiments of the present application is as follows: Figures 1 to 6 As shown, a hand-operated electric chain hoist includes a housing 100, a five-tooth long shaft 2, a lifting sprocket 3 and a driving assembly 5. The housing 100 can be fixedly installed or can be movably slidably installed along a slide rail. The specific installation method can be selected according to actual needs. The five-tooth long shaft 2 is rotatably installed on the housing 100, and the lifting sprocket 3 is rotatably installed on the first side of the five-tooth long shaft 2 and is connected to the five-tooth long shaft 2 through a gear set 4. The gear set 4 can reduce the rotation speed transmitted from the five-tooth long shaft 2 to the lifting sprocket 3, thereby increasing the lifting capacity of the lifting sprocket 3 by reducing the output rotation speed. The driving assembly 5 is installed on the second side of the five-tooth long shaft 2 and extends the driving end 50 outside the housing 100. When a heavy object needs to be lifted, the driving end 50 can be driven to rotate forward manually or electrically by the actuator outside the housing 100, and the driving assembly 5 can drive the five-tooth long shaft 2 to rotate forward, and the lifting sprocket 3 will raise the lifting chain under the transmission of the gear set 4. When a heavy object or a lifting chain is to be lowered, the driving end 50 can be driven to rotate backward manually or electrically by the actuator outside the housing 100, and the driving assembly 5 can drive the five-tooth long shaft 2 to rotate backward, and the lifting sprocket 3 will lower the lifting chain under the transmission of the gear set 4.

[0029] It is understandable that the driving of the traditional hand chain hoist is mainly through the cooperation of a hand chain wheel and a bracelet, that is, a hand chain wheel is installed on the second side of the five-tooth long shaft 2, and a bracelet is sleeved on the hand chain wheel. The hand chain is pulled to drive the hand chain wheel to rotate, and then the five-tooth long shaft 2 is driven to rotate through the cooperation of the hand chain wheel and the five-tooth long shaft 2. Since the size of the hand chain wheel is fixed after installation, the lifting capacity of the traditional hand chain hoist cannot be adjusted due to the influence of the hand chain wheel.

[0030] In the present embodiment, the driving assembly 5 drives the five-tooth long shaft 2 to rotate by being driven by an actuator outside the housing 100. The actuators include two types: replaceable and non-replaceable. For replaceable actuators, their specific size and structure can be adjusted according to actual needs, so as to adapt to the lifting range of the replacement. At the same time, by driving the external actuator, the hand chain wheel and the bracelet of the traditional hand chain hoist can be removed, so that the structure of the chain hoist can be optimized. The actuator can drive the driving assembly 5 manually or electrically. For the electric method, it can effectively improve work efficiency and reduce labor intensity.

[0031] In this embodiment, there are various structures and types of the actuator. For ease of understanding, three specific examples are provided below for illustration.

[0032] Example 1: Figures 1 to 3 As shown, the actuator is a manual wrench, i.e., a hand-cranked wrench; accordingly, the driving end 50 of the driving assembly 5 extending outside the housing 100 is an external hexagon or other structure that can cooperate with a wrench. Thus, when lifting or lowering a heavy object, the manual wrench can manually drive the five-tooth long shaft 2 to rotate. Moreover, depending on the weight of the heavy object, the length of the manual wrench can also be different, that is, the heavier the weight of the heavy object, the longer the length of the manual wrench to increase the lever arm as much as possible, and vice versa.

[0033] Example 2: Figures 1 to 3 As shown, the actuator is an electric wrench; accordingly, the driving end 50 of the driving assembly 5 extending outside the housing 100 is an external hexagon or other structure that can cooperate with a wrench. The electric wrench can be connected to the driving end 50 by hand or fixed means, and then the five-tooth long shaft 2 is driven to rotate by electric means. In addition, the output power of the electric wrench can also be different according to the weight of the heavy object, that is, the greater the weight of the heavy object, the greater the power output of the electric wrench, and vice versa.

[0034] Example 3: Figures 4 to 6As shown, the actuator is a motor 53; the motor 53 is fixedly mounted outside the housing 100 and connected to the driving end 50 through the output end. The motor 53 drives the five-tooth long shaft 2 to rotate in an electric manner under the power supply of a mobile power source 55 installed outside the housing 100. In addition, the output power of the motor 53 may be different depending on the weight of the heavy object, that is, the greater the weight of the heavy object, the greater the power output of the motor 53, and vice versa.

[0035] It should be known that the specific structures and working principles of the manual wrench, the electric wrench and the motor 53 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here. The output power of the motor 53 can be controlled by the power supply of the mobile power supply 55.

[0036] It should also be known that the motor 53 is powered by the mobile power supply 55, and the mobile power supply 55 can be charged through the power grid, so that when the power grid is cut off, the mobile power supply 55 still has enough power to operate the motor 53. It can effectively avoid the instantaneous stop of heavy object lifting due to power outage of the power grid, so as to improve the safety of the chain hoist.

[0037] In this embodiment, Figure 6 As shown, the start and stop and power control of the motor 53 can be controlled by a remote control receiver 56 installed outside the housing 100. Specifically, the remote control receiver 56 is electrically connected to the mobile power supply 55, and is also connected to the control switch signal in the operator's hand; so that when it is necessary to lift a heavy object, the operator can send a control signal to the remote control receiver 56 through the control switch, and then the remote control receiver 56 controls the mobile power supply 55 to supply power to the motor 53 according to the received signal. More specifically, when it is necessary to lift a heavy object, the remote control receiver 56 can control the mobile power supply 55 to supply power to the motor 53 to drive the motor 53 to rotate forward; when it is necessary to put down a heavy object, the remote control receiver 56 can control the mobile power supply 55 to supply power to the motor 53 to drive the motor 53 to rotate in the reverse direction; when lifting heavy objects of different weights, the remote control receiver 56 can control the mobile power supply 55 to supply power to the motor 53.

[0038] It should be known that the specific structures of the control switch and the remote control receiver 56 and the mutual control methods are well known to those skilled in the art, and therefore will not be elaborated in detail here.

[0039] In the conventional hand chain hoist, the emergency braking of the five-tooth long shaft 2 is mainly achieved by the cooperation of the ratchet 62 and the pawl 64. The cooperation between the ratchet 62 and the pawl 64 is passive, and a large impact will be generated at the moment of braking, which is easy to damage the ratchet 62 and the pawl 64, thereby causing the brake to fail.

[0040] Based on this, in this embodiment, Figures 1 to 4 as well as Figure 6 As shown, the drive assembly 5 is threadedly matched with the second side of the five-tooth long shaft 2; the hand-operated electric chain hoist also includes a traction assembly 6; the traction assembly 6 is installed on the second side of the five-tooth long shaft 2. The drive assembly 5 can move axially under the drive of the actuator, and can approach or move away from the traction assembly 6 during the axial movement of the drive assembly 5. Specifically, when lifting a heavy object, the drive assembly 5 can move in the direction close to the traction assembly 6 under the drive of the actuator until the drive assembly 5 contacts and squeezes the traction assembly 6 to synchronously move to axially press the five-tooth long shaft 2, so that the traction assembly 6 and the five-tooth long shaft 2 are frictionally matched. When the friction between the traction assembly 6 and the five-tooth long shaft 2 is greater than the gravity of the heavy object, the five-tooth long shaft 2 will rotate synchronously with the traction assembly 6 and the drive assembly 5, and then the lifting sprocket 3 can be driven to pull the heavy object upward. When the heavy object is lowered, the driving assembly 5 can be moved away from the traction assembly 6 under the drive of the actuator, so that the friction fit between the traction assembly 6 and the five-tooth long shaft 2 is disengaged, and the five-tooth long shaft 2 can automatically move downward under the gravity of the heavy object.

[0041] For ease of understanding, the specific working process of the driving component 5 may be described below.

[0042] Initially, there is a gap or loose contact between the driving assembly 5 and the traction assembly 6 .

[0043] When a heavy object needs to be lifted, the driving assembly 5 will perform a spiral rotation close to the traction assembly 6 under the drive of the positive rotation of the actuator. At this time, the five-tooth long shaft 2 remains stationary under the pull of the gravity of the heavy object; with the axial compression of the driving assembly 5, the friction between the traction assembly 6 and the five-tooth long shaft 2 gradually increases. When the friction between the traction assembly 6 and the five-tooth long shaft 2 is greater than or equal to the gravity of the heavy object, the five-tooth long shaft 2 will rotate forward with the traction assembly 6 and the driving assembly 5. And the heavier the weight of the heavy object, the greater the friction between the traction assembly 6 and the five-tooth long shaft 2.

[0044] When the weight needs to be lowered, the drive assembly 5 will perform a spiral rotation away from the traction assembly 6 under the reverse rotation of the actuator. As the drive assembly 5 moves away axially, the friction between the traction assembly 6 and the five-tooth long shaft 2 gradually decreases. When the friction between the traction assembly 6 and the five-tooth long shaft 2 is less than the gravity of the weight, the five-tooth long shaft 2 will rotate in the opposite direction under the action of the gravity of the weight, and the speed of the reverse rotation is greater than the rotation speed of the drive assembly 5. Due to the speed difference between the five-tooth long shaft 2 and the drive assembly 5, the five-tooth long shaft 2 and the drive assembly 5 approach each other again until the two are squeezed and locked together again. That is, the descending process of the weight will eventually maintain the synchronization of the descending speed and the reverse rotation speed of the drive assembly 5.

[0045] It is understandable that during the process of lifting the heavy object, if slippage occurs and the heavy object tends to fall, the five-tooth long shaft 2 will have a tendency to rotate in the opposite direction, which will cause the five-tooth long shaft 2 and the driving component 5 to continue to tighten, so that the friction between the traction component 6 and the five-tooth long shaft 2 increases, thereby achieving a braking locking effect. That is, the threaded cooperation of the driving component 5 and the five-tooth long shaft 2 to squeeze the traction component 6 and the five-tooth long shaft 2 to cooperate has an active self-locking effect.

[0046] In this embodiment, there are many specific structures of the traction assembly 6. For the convenience of understanding, one of the structures can be given below. Figure 2 , Figure 3 and Figure 6 As shown, the traction assembly 6 includes a friction plate 61, a ratchet 62 and a pressure plate 63. The pressure plate 63 is fixedly mounted on the five-tooth long shaft 2, and the friction plate 61 and the ratchet 62 are both slidably mounted on the optical shaft section 23 on the five-tooth long shaft 2, and the ratchet 62 is located between the pressure plate 63 and the friction plate 61 and cooperates with the pawl 64 installed on the inner side of the housing 100.

[0047] When it is necessary to lift a heavy object, the drive assembly 5 can axially squeeze the friction disc 61 to move toward the first side of the five-tooth long shaft 2 until the friction disc 61, the ratchet 62 and the pressure plate 63 are tightened. When the mutual friction force generated by the positive pressure of the friction disc 61, the ratchet 62 and the pressure plate 63 is greater than the gravity of the heavy object, the friction disc 61, the ratchet 62 and the pressure plate 63 will rotate synchronously with the drive assembly 5, and then the five-tooth long shaft 2 can drive the lifting sprocket 3 to rotate through the gear set 4. When it is necessary to lower the heavy object, the drive assembly 5 can be away from the friction disc 61, and the positive pressure between the friction disc 61, the ratchet 62 and the pressure plate 63 gradually decreases, so that the friction between the friction disc 61, the ratchet 62 and the pressure plate 63 cannot maintain the gravity of the heavy object, and then the five-tooth long shaft 2 will rotate in the opposite direction under the gravity of the heavy object to achieve the lowering of the heavy object.

[0048] It should be known that, during the lifting of the heavy object, the self-locking structure formed between the driving assembly 5, the traction assembly 6 and the five-tooth long shaft 2 and the braking structure formed by the ratchet 62 and the pawl 64 can form a double braking for the heavy object to suspend. During the lowering of the heavy object, the braking by the ratchet 62 and the pawl 64 will fail, and the heavy object can only be suspended by the self-locking structure formed between the driving assembly 5, the traction assembly 6 and the five-tooth long shaft 2.

[0049] In this embodiment, there are various specific structures of the driving component 5 that can realize the above functions. For the sake of easy understanding, three specific examples are used for explanation below.

[0050] Example 1: The driving assembly 5 includes a connecting sleeve 521, which is threadedly connected to the threaded segment 22 on the second side of the five-tooth long shaft 2, and one end of the connecting sleeve 521 extends to the outside of the shell 100 to form a driving end 50; the connecting sleeve 521 can be driven by the actuator to squeeze or move away from the traction assembly 6 by spirally rotating relative to the five-tooth long shaft 2.

[0051] Example 2: Figure 2 and Figure 3 As shown, the driving assembly 5 includes a main gear 51 and a driven gear 52; the driven gear 52 is threadedly connected to the threaded section 22 on the second side of the five-tooth long shaft 2 through a centrally arranged connecting sleeve 521; the main gear 51 is rotatably mounted on the housing 100 through a rotating shaft and meshes with the driven gear 52, and the end of the rotating shaft extending outside the housing 100 forms a driving end 50; the main gear 51, driven by the actuator, drives the driven gear 52 to perform a spiral rotation relative to the five-tooth long shaft 2 to squeeze or move away from the traction assembly 6.

[0052] Example 3: Figure 5 and Figure 6 As shown, the driving assembly 5 includes a main gear 51 and a gear plate 54; the gear plate 54 is threadedly connected to the threaded section 22 on the second side of the five-tooth long shaft 2 through a centrally arranged connecting sleeve 521; the main gear 51 is rotatably mounted on the housing 100 through a rotating shaft and meshes with the inner gear ring of the gear plate 54, and the end of the rotating shaft extending outside the housing 100 forms a driving end 50; the main gear 51, driven by the actuator, drives the gear plate 54 to perform a spiral rotation relative to the five-tooth long shaft 2 to squeeze or move away from the traction assembly 6.

[0053] It is understandable that in Example 1, the connecting sleeve 521 will drive the driving end 50 to move axially during the spiral rotation, so the driving end 50 in Example 1 can be driven by a manual or electric wrench. In Examples 2 and 3, the axial position of the main gear 51 does not need to be changed, and the axial position of the driven gear 52 or the gear plate 54 will change with the meshing, so the driving end 50 in Examples 2 and 3 can be driven by a manual or electric wrench and a motor 53. Of course, in order to ensure that the main gear 51 can stably mesh with the inner gear ring on the driven gear 52 or the gear plate 54, the meshing width of the main gear 51 and the inner gear ring on the driven gear 52 or the gear plate 54 must be greater than the axial movement distance of the driven gear 52 or the gear plate 54 during the lifting process.

[0054] In this embodiment, the specific structure of the gear set 4 for transmission between the five-tooth long shaft 2 and the lifting sprocket 3 is a well-known technology for those skilled in the art; for ease of understanding, a brief description can be given below.

[0055] Specifically, Figure 2 , Figure 3 and Figure 6 As shown, the gear set 4 includes at least one four-tooth short shaft 41, at least one first gear 42 and a second gear 43. The four-tooth short shaft 41 is rotatably mounted on the housing 100, and the first gear 42 is fixedly mounted on the first side of the four-tooth short shaft 41 and meshes with the first gear shaft segment 21 on the first side of the five-tooth long shaft 2. The second gear 43 is fixedly mounted on one side of the lifting sprocket 3 and meshes with the second gear shaft segment 411 on the second side of the four-tooth short shaft 41. The diameter of the first gear 42 is greater than the diameter of the first gear shaft segment 21, and the diameter of the second gear 43 is greater than the diameter of the second gear shaft segment 411.

[0056] When the five-tooth long shaft 2 rotates, the four-tooth short shaft 41 can be driven to rotate through the meshing of the first gear shaft section 21 and the first gear 41, and then the four-tooth short shaft 41 can drive the lifting sprocket 3 to rotate through the meshing of the second gear shaft section 411 and the second gear 43. The above process can also be reversed to drive the five-tooth long shaft 2 to rotate through the gravity of the weight.

[0057] It is understandable that in order to ensure the stability of transmission, the number of the four-tooth short shafts 41 is preferably multiple, for example Figure 2 , Figure 3 and Figure 6 As shown, the number of the four-tooth short shafts 41 is a pair and they are symmetrically arranged.

[0058] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A hand-operated electric chain hoist, comprising a housing and a five-tooth long shaft; the five-tooth long shaft is rotatably mounted on the housing, and a heavy object is lifted or lowered by rotating a first side; characterized in that: It also includes a driving component; the driving component is installed on the second side of the five-tooth long shaft and extends the driving end outside the shell; the actuator outside the shell drives the driving end manually or electrically to drive the five-tooth long shaft to rotate.

2. The hand-operated electric chain hoist according to claim 1, characterized in that: The actuating member is a manual wrench, and the manual wrench drives the five-tooth long shaft to rotate manually.

3. The hand-operated electric chain hoist according to claim 1, characterized in that: The actuating member is an electric wrench, which is connected to the driving end in a handheld or fixed manner, and then drives the five-tooth long shaft to rotate in an electrically powered manner.

4. The hand-operated electric chain hoist according to claim 1, characterized in that: The actuator is a motor, which is fixedly mounted outside the shell and connected to the driving end through an output end; the motor drives the five-tooth long shaft to rotate in an electric manner under the power supply of a mobile power source installed outside the shell.

5. The hand-operated electric chain hoist according to claim 4, characterized in that: A remote control receiver is also installed on the outside of the shell, and the remote control receiver is electrically connected to the mobile power supply. The remote control receiver is suitable for controlling the mobile power supply to supply power to the motor according to the received signal, and then controlling the lifting and lowering of heavy objects on the five-tooth long shaft.

6. The hand-operated electric chain hoist according to any one of claims 1 to 5, characterized in that: The drive assembly is threadedly engaged with the second side of the five-tooth long shaft; the hand-operated electric chain hoist also includes a traction assembly; the traction assembly is installed on the second side of the five-tooth long shaft; the drive assembly is suitable for axial movement under the drive of the actuator, thereby approaching and squeezing the traction assembly to frictionally engage with the five-tooth long shaft, or moving away from the traction assembly to disengage the traction assembly from the five-tooth long shaft.

7. The hand-operated electric chain hoist according to claim 6, characterized in that: The traction assembly includes a friction plate, a ratchet and a pressure plate; the pressure plate is fixedly mounted on the five-tooth long shaft, the friction plate is slidably mounted on the five-tooth long shaft, the ratchet is slidably mounted on the five-tooth long shaft and is located between the pressure plate and the friction plate and cooperates with a pawl installed on the inner side of the shell; the friction plate is suitable for tightening the ratchet and the pressure plate under the axial extrusion of the drive assembly, and then driving the five-tooth long shaft to rotate with the drive assembly through friction cooperation.

8. The hand-operated electric chain hoist according to claim 6, characterized in that: The driving assembly includes a connecting sleeve, which is threadedly connected to the second side of the five-tooth long shaft, and one end of the connecting sleeve extends to the outside of the shell to form the driving end; the connecting sleeve is suitable for squeezing or moving away from the traction assembly by spirally rotating relative to the five-tooth long shaft under the drive of the actuator.

9. The hand-operated electric chain hoist according to claim 6, characterized in that: The driving assembly includes a main gear and a driven gear; the driven gear is threadedly connected to the second side of the five-tooth long shaft through a connecting sleeve arranged in the center; the main gear is rotatably mounted on the shell through a rotating shaft and meshes with the driven gear, and the end of the rotating shaft extending outside the shell forms the driving end; the main gear, driven by the actuator, drives the driven gear to perform a spiral rotation relative to the five-tooth long shaft to squeeze or move away from the traction assembly.

10. The hand-operated electric chain hoist according to claim 6, characterized in that: The driving assembly includes a main gear and a gear plate; the gear plate is threadedly connected to the second side of the five-tooth long shaft through a connecting sleeve arranged in the center; the main gear is rotatably mounted on the housing through a rotating shaft and meshes with the inner gear ring of the gear plate, and the end of the rotating shaft extending outside the housing forms the driving end; the main gear, driven by the actuator, drives the gear plate to perform a spiral rotation relative to the five-tooth long shaft to squeeze or move away from the traction assembly.

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