Displacement machine with active release function

Abstract

The utility model discloses a shifting machine with an active release function, which solves the technical problem that the existing shifting machine cannot actively release, and comprises a motor, a lifting device and a transmission device, the motor drives the lifting device to act through the transmission device, the transmission device comprises a first transmission wheel, a second transmission wheel and a third transmission wheel, the shaft is provided with a shaft hole and a first transmission groove communicated with the shaft hole; the first transmission shaft penetrates through the shaft hole and is provided with a second transmission groove, a first transmission key and a first elastic pre-tightening component are arranged in the second transmission groove, and the first elastic pre-tightening component applies pre-tightening force to the first transmission key, so that the first transmission key extends out of the second transmission groove and is kept in radial joint with the first transmission groove; and the release component is arranged at the shaft end of the first transmission shaft, extends into the second transmission groove and is connected with the first transmission key, and the release component drives the first transmission key to be separated from the first transmission groove so as to implement active release.

Description

[Technical field]

[0001] The utility model relates to the technical field of transfer machines, in particular to a transfer machine with an active release function. [Background technology]

[0002] A transfer machine is a medical auxiliary device, which is mainly used to help patients with limited mobility to lift and transfer. It can reduce the physical labor of nursing staff and reduce the risk of patient injury. A common transfer machine in the prior art includes a motor, a lifting device and a transmission device. The motor drives the lifting device through the transmission device, wherein the lifting device includes a drum with a rigging wound on it, and the transmission device includes a first transmission wheel and a first transmission shaft connected in a transmission manner. One of the first transmission wheel and the first transmission shaft is used to receive the power input of the motor, and the other is used to output power to the drum, so that the drum rotates to realize the winding and release of the rigging, thereby realizing the lifting and lowering of the patient by the transfer machine. If the motor is suddenly powered off due to circuit problems during the use of the transfer machine, or the motor and the transmission mechanism between the motor and the transmission device are damaged due to improper use or other abnormal reasons, the transmission device will be unable to output normal power, that is, the lifting device cannot move, and the rigging cannot be released. Especially when the patient uses the rigging, the patient cannot be released, thereby reducing the use experience of the nursing staff and the patient. [Contents of the utility model]

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a transfer machine with an active release function, which can disconnect the transmission connection between the first transmission wheel and the first transmission shaft through a release component under abnormal circumstances, so that the two can rotate relatively, and then the lifting device can be activated to actively release the rigging. In particular, when the patient uses the rigging, the patient can be actively released to ensure the safety of the patient.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A lifting machine with an active release function comprises a motor, a lifting device and a transmission device, wherein the motor drives the lifting device to move through the transmission device, and the transmission device comprises:

[0006] A first transmission wheel has an axial hole and a first transmission groove communicating with the axial hole; and

[0007] The first transmission shaft passing through the shaft hole has a second transmission groove, the second transmission groove has a first transmission key and a first elastic preload component built therein, the first elastic preload component applies a preload force to the first transmission key, so that the first transmission key extends out of the second transmission groove and maintains radial engagement with the first transmission groove; and

[0008] A release component is arranged at the shaft end of the first transmission shaft and extends into the second transmission groove to connect with the first transmission key. The release component drives the first transmission key to disengage from the first transmission groove to implement active release.

[0009] When the shifting machine of the utility model works normally, the pre-tightening force of the first elastic pre-tightening component will extend the first transmission key out of the second transmission groove and maintain radial engagement with the first transmission groove, thereby enabling the first transmission wheel and the first transmission shaft to achieve transmission connection to achieve torque transmission, and then drive the lifting device to operate normally. Once the motor is suddenly powered off due to a circuit problem, or the motor or the transmission mechanism between the motor and the transmission device is damaged due to improper use or other abnormal reasons, the first transmission key can be disengaged from the first transmission groove by a releasing component to overcome the pre-tightening force of the first elastic pre-tightening component, that is, the transmission connection between the first transmission wheel and the first transmission shaft is disconnected, so that the two can rotate relatively. At this time, the rigging is pulled to make the lifting device move to actively release the rigging. In particular, when the patient uses the rigging, the patient can be actively released to ensure the safety of the patient and improve the use experience of the nursing staff and the patient.

[0010] In the above-mentioned lift with active release function, the release component includes a release rod, the shaft end of the first transmission shaft is provided with a rod hole, the rod hole axially penetrates from the end face of the first transmission shaft to the second transmission groove, the release rod is installed in the rod hole and is hinged with the first transmission key. With such a design, the release rod moves along the axial direction of the first transmission shaft in a direction away from the second transmission groove, so as to drive the first transmission key to rotate in the second transmission groove, thereby retracting the first transmission key into the second transmission groove, and the structure is relatively simple.

[0011] In the above-mentioned lift with active release function, the release rod presents an initial state and a release state through axial movement. The release rod drives the first transmission key to disengage from the first transmission groove during the axial movement from the initial state to the release state. An elastic reset element for resetting the release rod to the initial state is arranged in the rod hole. With such a design, after the pulling force on the release rod is released, the release rod can be driven by the elastic reset element to achieve automatic reset, so as to prepare for subsequent active release. Only one elastic reset element needs to be added to the transmission device, thereby simplifying the overall structure of the transmission device.

[0012] In the above-mentioned shifting machine with active release function, a radial flange is provided on the release rod, a shoulder and a retaining ring are axially spaced in the rod hole, the elastic reset element is pre-tightened between the radial flange and the retaining ring, and the release rod is in the initial state, and the radial flange is stopped by the shoulder. With such a design, during the axial movement of the release rod from the initial state to the release state, the elastic reset element can be compressed by the radial flange to give it a certain elastic force, so that after the tension on the release rod is released, the elastic force of the elastic reset element can be used to drive the radial flange to move in the direction of the second transmission groove until the radial flange abuts against the shoulder, and the release rod is in the initial state.

[0013] In the above-mentioned lift with active release function, the release rod and the first transmission key are hinged by a pin, and the first transmission shaft is provided with a first assembly hole for the pin to pass through. With such a design, during assembly, the end of the release rod hinged to the first transmission key and one end of the first transmission key are first placed in the first transmission groove, and then the pin is passed through the first transmission shaft, the release rod and the first transmission key to realize the hinge connection of the first transmission key and the release rod, which is relatively simple to assemble.

[0014] In the above-mentioned shifting machine with active release function, a guide surface is provided on the first transmission key, and a stop component is provided on the first transmission shaft. During the active release process of the release component, the stop component forms a stop for the axial movement of the first transmission key and can be slidably pressed on the guide surface. The first transmission key is stopped by the stop component and rotates to disengage from the first transmission groove and compress the first elastic preload component. The axial movement of the first transmission key comes from the traction of the release component. With such a design, the stop component can form a stop for the axial movement of the first transmission key and can be slidably pressed on the guide surface, so that the first transmission key can rotate more smoothly to quickly disengage from the first transmission groove, thereby timely disconnecting the transmission connection between the first transmission wheel and the first transmission shaft.

[0015] In the above-mentioned lift with active release function, the guide surface includes a first guide surface and a second guide surface, the first guide surface and the second guide surface are connected to form a concave first corner, and during the active release process of the release component, the stop component slides from the first guide surface to the second guide surface, and when the stop component is pressed on the second guide surface, the first transmission key disengages from the first transmission groove. With such a design, when the release component is in the initial state, the concave first corner can be used to allow the stop component to stably maintain contact with the first guide surface and will not easily slide to the second guide surface due to vibration and force the first transmission key to disengage from the first transmission groove, thereby ensuring the stability of the transmission connection between the first transmission wheel and the first transmission shaft when the transmission device is working normally.

[0016] In the above-mentioned lift with active release function, the first guide surface and the second guide surface are connected by an arc-shaped transition surface. With such a design, during the process of the release component implementing active release, the stop component can slide smoothly from the first guide surface to the second guide surface, avoiding jamming at the corner of the recessed first corner, which causes the stop component to be unable to slide to the second guide surface, thereby causing the first transmission key to be unable to be driven out of the first transmission groove to implement active release.

[0017] In the above-mentioned shifting machine with active release function, the first transmission key also includes a second convex corner, the first elastic preload component acts on the second corner, the first transmission key has a free end and a connection end connected to the release component, and the distance between the first corner and the second corner gradually increases from the connection end to the free end. With such a design, during the active release process of the release component, the width of the part of the first transmission key clamped between the stop component and the first elastic preload component can be made larger and larger, so that the stop component always abuts against the guide surface, thereby ensuring that the stop component stops the axial movement of the first transmission key.

[0018] In the above-mentioned lift with active release function, the stop member has an arc-shaped stop surface. Such a design enables the stop member to slide and cooperate smoothly with the guide surface, so that the first transmission key can be smoothly retracted into the second transmission groove.

[0019] In the above-mentioned lift with active release function, the stop member is assembled in the second transmission groove, and the first transmission shaft is provided with a second assembly hole for the stop member to pass through. Such a design not only enhances the stopping effect of the stop member on the axial movement of the first transmission key, but also allows the first stop member to be assembled after the first transmission key is assembled by passing the stop member through the second assembly hole, which makes the assembly simple and convenient.

[0020] In the above-mentioned shifting machine with active release function, the first elastic pre-tightening component includes an arched curved body and legs extending from both ends of the curved body, the curved body abuts the first transmission key in the direction of the first transmission groove, and the legs are supported on the bottom surface of the second transmission groove. With such a design, the bending amplitude of the curved body can be adjusted by adjusting the distance between the two legs, so as to adjust the pre-tightening force of the first elastic pre-tightening component; in addition, by distributing the two legs at intervals along the axial direction, the first transmission key can always maintain abutment with the curved body during axial movement, without the need for the curved body to be connected to the first transmission key, thereby eliminating the connection between the first elastic pre-tightening component and the first transmission key, and making assembly simpler.

[0021] In the above-mentioned lift with active release function, the first elastic pre-tightening component is one of a disc spring, a coil spring, and a rubber spring, or a combination thereof.

[0022] In the above-mentioned lift with active release function, the engagement of the first transmission key with the first transmission groove is configured to generate a radial component force forcing the first transmission key to disengage from the first transmission groove when the first transmission wheel or the first transmission shaft is subjected to overload torque. With such a design, under a predetermined torque, the first transmission key can maintain radial engagement with the first transmission groove under the preload force of the first elastic preload component. At this time, the first transmission wheel and the first transmission shaft realize transmission connection through the first transmission key, thereby realizing torque transmission; and when the load (patient) is overloaded, the radial component force applied to the first transmission key can cause the first transmission key to disengage from the first transmission groove, thereby disconnecting the transmission connection between the first transmission wheel and the first transmission shaft, so that the two can rotate relative to each other to implement overload protection, and the idling of the first transmission wheel or the first transmission shaft as the power output can quickly release the reverse torque applied by the load, thereby avoiding damage to the first transmission wheel or the first transmission shaft, and since the reverse torque of the load cannot be transmitted to the component that receives the power, the component that receives the power is also avoided from being damaged by the reverse torque of the excessive load, thereby avoiding damage to the transmission device and extending the service life of the transmission device; finally, implementing overload protection through the first transmission key also makes the overall structure simpler and more compact.

[0023] In the above-mentioned lift with active release function, the first transmission groove gradually expands in the direction of disengagement of the first transmission key; and / or the first transmission key gradually shrinks in the direction of engagement. With such a design, a slow separation can be achieved when the first transmission key disengages from the first transmission groove, and a slow contact can be achieved when the first transmission key radially engages with the first transmission groove. The clutch is relatively smooth, thereby reducing noise, extending the service life of the product, and providing a better user experience.

[0024] In the above-mentioned lifting machine with active release function, at least two first transmission grooves are arranged on the first transmission wheel at intervals along the circumference of the shaft hole. With such a design, after solving the abnormal situation, when it is necessary to align the first transmission groove with the second transmission groove in the radial direction so that the first transmission key can be radially engaged with the first transmission groove again under the preload force of the first elastic preload component, it is not necessary to rotate the first transmission wheel one circle to align one of the first transmission grooves with the second transmission groove in the radial direction, thereby shortening the time required for the radial alignment of the first transmission groove with the second transmission groove and improving the user experience.

[0025] In the above-mentioned lift with active release function, the first transmission wheel is one of a gear, a sprocket, a pulley and a friction wheel.

[0026] In the above-mentioned lift with active release function, the transmission device also includes a second transmission wheel, the second transmission wheel is mounted on the first transmission shaft, the second transmission wheel and the first transmission shaft establish radial coupling transmission through the second transmission key preloaded by the second elastic preload component, and when the second transmission wheel or the first transmission shaft is subjected to overload torque, the second transmission key is forced to release the radial coupling to implement overload protection. With such a design, when the load is overloaded, the overload protection is implemented by forcing the second transmission key to release the radial coupling to prevent the reverse torque applied by the load from being transmitted to the second transmission wheel or the second transmission shaft as the power input, thereby avoiding the second transmission wheel or the second transmission shaft as the power input from being damaged by the reverse torque of the excessive load, that is, avoiding damage to the transmission device and extending the service life of the transmission device.

[0027] In the above-mentioned transfer machine with active release function, the transfer machine also includes a first support frame and a second support frame that are spaced apart from each other, the two ends of the first transmission shaft are respectively rotatably connected to the first support frame and the second support frame, and the motor is installed on the first support frame and / or the second support frame.

[0028] In the above-mentioned transfer machine with active release function, the transfer machine is equipped with two motors, the two motors are respectively installed on the first support frame and the second support frame, the transmission device also includes a second transmission shaft, the two ends of the second transmission shaft are respectively rotatably connected to the first support frame and the second support frame, the second transmission shaft is driven to rotate by one motor or two motors, and the second transmission shaft transmits torque to the first transmission wheel. With such a design, the working number of the motor can be selected according to the load condition to improve the user experience.

[0029] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings.

Brief Description of the Drawings

[0030] The utility model is further described below in conjunction with the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the assembly structure of the motor, the transmission device and the lifting device in the first embodiment of the utility model;

[0032] Figure 2 for Figure 1 A top view of

[0033] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0034] Figure 4It is a schematic diagram of the state in which the first transmission key is engaged with the first transmission groove when the release rod is in the initial state in the first embodiment of the utility model;

[0035] Figure 5 This is an exploded schematic diagram of the transmission device in the first embodiment of the utility model;

[0036] Figure 6 This is a schematic structural diagram of the first transmission shaft in the first embodiment of the utility model;

[0037] Figure 7 It is a cross-sectional view of the first transmission shaft in the first embodiment of the utility model;

[0038] Figure 8 This is a schematic diagram of the structure of the first transmission key in the first embodiment of the utility model;

[0039] Fig. 9 It is a cross-sectional view of the first transmission key in the first embodiment of the utility model;

[0040] Fig.10 It is an axial cross-sectional view of the release rod of the transmission device in the first embodiment of the utility model when it is in a released state;

[0041] Fig.11 This is a schematic diagram of the structure of the first transmission wheel in the first embodiment of the utility model;

[0042] Fig.12 This is an axial cross-sectional view of the transmission device in the second embodiment of the utility model;

[0043] Fig.13 It is a schematic diagram of the structure of the second transmission key in the second embodiment of the utility model.

[0044] Reference numerals:

[0045] 100, motor; 200, lifting device; 210, drum; 220, rigging; 300, transmission device; 310, first transmission wheel; 311, shaft hole; 312, first transmission groove; 320, first transmission shaft; 321, second transmission groove; 3210, guide groove; 322, pull rod hole; 3220, shaft shoulder; 3221, retaining ring; 323, first assembly hole; 324, stop member; 325, second assembly hole; 326, third transmission groove; 327, avoidance groove; 328, radial stop plate; 330, release member; 331, release rod; 3310, radial flange; 332, pin shaft; 333, elastic reset element; 340, first transmission key ; 341, first through hole; 342, guide surface; 3421, first guide surface; 3422, second guide surface; 343, second corner; 3431, third guide surface; 3432, fourth guide surface; 350, first elastic preload component; 351, curved body; 352, support foot; 360, second transmission wheel; 361, fourth transmission groove; 370, second transmission shaft; 371, third transmission wheel; 380, limiting sleeve; 390, retaining spring; 400, first support frame; 500, second support frame; 600, reduction box; 700, top plate; 800, bottom plate; 900, second elastic preload component; 1000, second transmission key; 1100, transmission section. [Specific implementation method]

[0046] The utility model provides a lifting machine with an active release function, comprising a motor, a lifting device and a transmission device, wherein the motor drives the lifting device to move through the transmission device, and the transmission device comprises:

[0047] A first transmission wheel has an axial hole and a first transmission groove communicating with the axial hole; and

[0048] The first transmission shaft passing through the shaft hole has a second transmission groove, the second transmission groove has a first transmission key and a first elastic preload component built therein, the first elastic preload component applies a preload force to the first transmission key, so that the first transmission key extends out of the second transmission groove and maintains radial engagement with the first transmission groove; and

[0049] A release component is arranged at the shaft end of the first transmission shaft and extends into the second transmission groove to connect with the first transmission key. The release component drives the first transmission key to disengage from the first transmission groove to implement active release.

[0050] When the shifting machine of the utility model works normally, the pre-tightening force of the first elastic pre-tightening component will extend the first transmission key out of the second transmission groove and maintain radial engagement with the first transmission groove, thereby enabling the first transmission wheel and the first transmission shaft to achieve transmission connection to achieve torque transmission, and then drive the lifting device to operate normally. Once the motor is suddenly powered off due to a circuit problem, or the motor or the transmission mechanism between the motor and the transmission device is damaged due to improper use or other abnormal reasons, the first transmission key can be disengaged from the first transmission groove by a releasing component to overcome the pre-tightening force of the first elastic pre-tightening component, that is, the transmission connection between the first transmission wheel and the first transmission shaft is disconnected, so that the two can rotate relatively. At this time, the rigging is pulled to make the lifting device move to actively release the rigging. In particular, when the patient uses the rigging, the patient can be actively released to ensure the safety of the patient and improve the use experience of the nursing staff and the patient.

[0051] The technical scheme of the embodiment of the utility model is explained and illustrated below in conjunction with the drawings of the embodiment of the utility model, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without making creative work all belong to the protection scope of the utility model. In addition, it should be understood that the following words indicating orientation or position relationship such as "up", "down", "left", "right", "longitudinal", "lateral", "inside", "outside", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0052] Embodiment 1

[0053] like Figures 1 to 11As shown, the lifting machine with active release function of this embodiment includes a motor 100, a lifting device 200 and a transmission device 300. The lifting device 200 includes a drum 210 and a rigging 220 wound on the drum 210. The motor 100 drives the lifting device 200 to move through the transmission device 300, that is, drives the drum 210 to rotate to wind and release the rigging 220, thereby realizing the lifting and lowering of the patient hung on the rigging 220. The transmission device 300 includes a first transmission wheel 310, a first transmission shaft 320 and a release component 330, wherein the first transmission wheel 310 has an axial hole 311 and a first transmission groove 312 connected to the axial hole 311, the first transmission shaft 320 is arranged through the axial hole 311, the first transmission wheel 310 is axially positioned on the first transmission shaft 320, the first transmission shaft 320 has a second transmission groove 321, the second transmission groove 321 has a first transmission key 340 and a first elastic pre-tightening component 350 built therein, the first elastic pre-tightening component 350 applies a pre-tightening force to the first transmission key 340, so that the first transmission key 340 extends out of the second transmission groove 321 and maintains radial engagement with the first transmission groove 312; and the release component 330 is arranged at the shaft end of the first transmission shaft 320 and extends into the second transmission groove 321 to connect with the first transmission key 340, and the release component 330 drives the first transmission key 340 to disengage from the first transmission groove 312 to implement active release.

[0054] When the lift in the present invention is working normally, the first transmission key 340 will extend out of the second transmission groove 321 and maintain radial engagement with the first transmission groove 312 under the pre-tightening force of the first elastic pre-tightening component 350, thereby enabling the first transmission wheel 310 and the first transmission shaft 320 to achieve transmission connection to achieve torque transmission, thereby driving the lifting device 200 to operate normally. Once the motor 100 is suddenly powered off due to a circuit problem, or the motor 100 or the transmission mechanism between the motor 100 and the transmission device 300 is damaged due to improper use or other abnormal reasons, the first transmission key 340 can be disengaged from the first transmission groove 312 through the release component 330 to overcome the pre-tightening force of the first elastic pre-tightening component 350, that is, the transmission connection between the first transmission wheel 310 and the first transmission shaft 320 is disconnected, so that the two can rotate relatively. At this time, the rigging 220 is pulled to make the lifting device 200 move to actively release the rigging 220. In particular, when the patient uses the rigging 220, the patient can be actively released to ensure the safety of the patient and improve the use experience of the nursing staff and the patient.

[0055] Specifically, the shifting machine in this embodiment further includes a first support frame 400 and a second support frame 500 which are spaced apart from each other. Both ends of the first transmission shaft 320 are rotatably connected to the first support frame 400 and the second support frame 500 through bearings, respectively. The roller 210 is rotatably installed between the first support frame 400 and the second support frame 500. There are two motors 100, which are respectively installed on the first support frame 400 and the second support frame 500. Reducer boxes 600 are also installed on the outer sides of the first support frame 400 and the second support frame 500, respectively. The motor 100 is connected to the reduction box 600. In addition, the transmission device 300 also includes a second transmission shaft 370. The two ends of the second transmission shaft 370 are rotatably connected to the first support frame 400 and the second support frame 500, respectively. The two ends of the second transmission shaft 370 are respectively connected to the two reduction boxes 600. The second transmission shaft 370 is provided with a third transmission wheel 371 that rotates synchronously. The motor 100 can drive the third transmission wheel 371 to rotate through the reduction box 600 and the second transmission shaft 370; the third transmission wheel 371 and the first transmission wheel 310 are gears. The third transmission wheel 371 is a gear. 1 meshes with the first transmission wheel 310, and the transmission device 300 also includes a second transmission wheel 360 axially positioned and sleeved on the first transmission shaft 320, the second transmission wheel 360 and the first transmission shaft 320 are key-matched or non-circularly matched to achieve synchronous rotation, the second transmission wheel 360 is a gear, and the second transmission wheel 360 is meshed with the gear ring on the drum 210. In this way, when the first transmission key 340 and the first transmission groove 312 are kept radially engaged, the torque of the third transmission wheel 371 can be transmitted through the first transmission wheel 310, the first transmission key 340, and the first transmission groove 312. The transmission shaft 320 and the second transmission wheel 360 are transmitted to the gear ring of the drum 210 to realize driving the drum 210 to rotate and wind or release the rigging 220; when the release component 330 drives the first transmission key 340 to disengage from the first transmission groove 312 and implement active release, the first transmission shaft 320 can idle relative to the first transmission wheel 310, and at this time, the rigging 220 is pulled to make the lifting device 200 move to actively release the rigging 220, especially when the patient uses the rigging, the patient can be actively released to ensure the safety of the patient and improve the use experience of the nursing staff and the patient. It should be noted that the second transmission shaft 370 in this embodiment is driven to rotate by one motor 100 or two motors 100. With such a design, the working number of the motor 100 can be selected according to the load conditions to improve the user experience.

[0056] It can be understood that in other embodiments of the present invention, the number of the motor and the reduction box can also be one, and the motor is connected to the second transmission shaft through the reduction box to drive the second transmission shaft to rotate.

[0057] In order to axially position the first transmission wheel 310 on the first transmission shaft 320, the transmission device 300 in this embodiment also includes a limiting sleeve 380 and a retaining spring 390. The retaining spring 390 is fixed in the groove of the first transmission shaft 320. The limiting sleeve 380 is abutted against the bearing provided on the first support frame 400. The first transmission wheel 310 is clamped and fixed between the limiting sleeve 380 and the retaining spring 390. In this way, the axial positioning of the first transmission wheel 310 on the first transmission shaft 320 can be achieved.

[0058] like Figures 3 to 11 As shown, the release component 330 in this embodiment includes a release rod 331, and the axial end of the first transmission shaft 320 is provided with a rod hole 322. The rod hole 322 axially penetrates from the end face of the first transmission shaft 320 to the second transmission groove 321 and is connected to the second transmission groove 321. The notch of the second transmission groove 321 is opened on the outer peripheral surface of the first transmission shaft 320, and the bottom of the second transmission groove 321 is closed. The release rod 331 is slidably installed in the rod hole 322 and is hinged to the first transmission key 340, so that the first transmission key 340 can rotate around the release rod 331. When the first transmission key 340 maintains radial engagement with the first transmission groove 312, the release rod 331 moves along the axial direction of the first transmission shaft 320 in a direction away from the second transmission groove 321, and the first transmission key 340 is forced to rotate toward the inner side of the second transmission groove 321 under the stopper of the side wall of the notch of the second transmission groove 321 to retract into the second transmission groove 321. That is, the release rod 331 moves along the axial direction of the first transmission shaft 320 in a direction away from the second transmission groove 321, so that the first transmission key 340 can be driven to rotate in the second transmission groove 321, and then the first transmission key 340 can be retracted into the second transmission groove 321. The structure is relatively simple.

[0059] Preferably, the release rod 331 is hinged to the first transmission key 340 via a pin shaft 332, the first transmission shaft 320 is provided with a first assembly hole 323 for the pin shaft 332 to pass through, the first assembly hole 323 radially penetrates the groove wall of the second transmission groove 321, and the first transmission key 340 is provided with a first through hole 341 for the pin shaft 332 to pass through. During assembly, the release rod 331 is inserted into the rod hole 322, and the first transmission key 340 is installed into the second transmission groove 321 through the notch of the second transmission groove 321. Then, the pin shaft 332 is installed into the second transmission groove 321 through the first assembly hole 323 and passes through the release rod 331 and the first transmission key 340. After the assembly is completed, the pin shaft 332 is located in the second transmission groove 321, so that the first transmission key 340 and the release rod 331 can be hinged, and the assembly is relatively simple; in addition, the inner side wall of the second transmission groove 321 is also provided with a guide groove 3210 extending along the axial direction, and the two ends of the pin shaft 332 are slidably inserted in the guide groove 3210.

[0060] In addition, the release rod 331 in this embodiment presents an initial state and a released state through axial movement. During the axial movement of the release rod 331 from the initial state to the released state, the first transmission key 340 is driven to disengage from the first transmission groove 312. An elastic reset element 333 for resetting the release rod 331 to the initial state is configured in the rod hole 322. With such a design, after the pulling force on the release rod 331 is released, the release rod 331 can be driven to automatically reset through the elastic reset element 333, so as to prepare for the subsequent active release. Only one elastic reset element 333 needs to be added to the transmission device 300, thereby simplifying the overall structure of the transmission device 300.

[0061] In order to facilitate the assembly of the elastic reset element 333, a radial flange 3310 is provided on the release rod 331 in this embodiment, and a shaft shoulder 3220 and a retaining ring 3221 are axially spaced in the rod hole 322. The inner diameter of the shaft shoulder 3220 is smaller than the outer diameter of the radial flange 3310, and the elastic reset element 333 is one of a coil spring, a rubber spring, and a butterfly spring. During assembly, the radial flange 3310 is firstly abutted against the shaft shoulder 3220, and then the elastic reset element 333 is sleeved on the release rod 331 and placed in the rod hole 322, and finally the retaining ring 3221 is fixed in the rod hole 322. The retaining ring 3221 and the radial flange 3310 can compress the elastic reset element 333, so that the elastic reset element 333 is pre-tightened between the radial flange 3310 and the retaining ring 3221, and the release rod 331 is in the initial state, and the radial flange 3310 is stopped by the shaft shoulder 3220. With such a design, during the axial movement of the release rod 331 from the initial state to the released state, the elastic reset element 333 can be compressed by the radial flange 3310 to give it a certain elastic force, so that after the pulling force on the release rod 331 is released, the elastic force of the elastic reset element 333 can be used to drive the radial flange 3310 to move toward the second transmission groove 321 until the radial flange 3310 abuts against the shaft shoulder 3220, at which time the release rod 331 is in the initial state.

[0062] In addition, in this embodiment, a guide surface 342 is provided on the first transmission key 340, and a stopper component 324 is provided on the first transmission shaft 320. During the active release process of the release component 330, the stopper component 324 forms a stopper for the axial movement of the first transmission key 340 and slidably presses on the guide surface 342. The first transmission key 340 is stopped by the stopper component 324 and rotates to disengage from the first transmission groove 312 and compresses the first elastic preload component 350. The axial movement of the first transmission key 340 comes from the traction of the release component 330. With such a design, the stopper component 324 can form a stopper for the axial movement of the first transmission key 340 and slidably presses on the guide surface 342, so that the first transmission key 340 can rotate more smoothly to quickly disengage from the first transmission groove 312, thereby timely disconnecting the transmission connection between the first transmission wheel 310 and the first transmission shaft 320.

[0063] Preferably, Figure 8 and Fig. 9 As shown, the guide surface 342 in this embodiment includes a first guide surface 3421 and a second guide surface 3422, the first guide surface 3421 extends approximately along the axial direction of the first transmission shaft 320, and the second guide surface 3422 extends approximately radially toward the notch of the second transmission groove 321, so that the first guide surface 3421 and the second guide surface 3422 are connected to form a concave first corner, and the concave in this embodiment is a concave pointing in a direction away from the notch of the second transmission groove 321; in addition, the first transmission key 340 also includes a convex second corner 343, and the second corner 343 includes a first guide surface 3421 and a second guide surface 3422 arranged opposite to the first guide surface 3421. The third guide surface 3431 and the fourth guide surface 3432 are arranged opposite to the second guide surface 3422, and the third guide surface 3431 and the fourth guide surface 3432 are connected by an arc transition that convexes outward in the direction away from the first corner. The first elastic preload component 350 acts on the second corner. The first transmission key 340 has a free end and a connecting end connected to the release rod 331. The distance between the first corner and the second corner 343 gradually increases from the connecting end to the free end, especially the distance between the fourth guide surface 3432 and the second guide surface 3422 is greater than the distance between the first guide surface 3421 and the third guide surface 3431.

[0064] The stop component 324 is a cylindrical rod assembled in the second transmission groove 321. The outer peripheral surface of the stop component 324 forms an arc-shaped stop surface. The first transmission shaft 320 is provided with a second assembly hole 325 for the stop component 324 to pass through. With such a design, after the first transmission key 340 and the release rod 331 are assembled, the stop component 324 can be assembled to the first transmission shaft 320 by passing the cylindrical rod through the first transmission shaft 320 and making the two ends of the cylindrical rod respectively cooperate with the two second assembly holes 325. The assembly is relatively simple and convenient. After the stop component 324 is assembled, when the release rod 331 is in the initial state, the stop component 324 is against the first guide surface 3421, and the first transmission key 340 is radially engaged with the first transmission groove 312. During the active release process of the release component 330, the stop component 324 slides from the first guide surface 3421 to the second guide surface 3422. When the stop component 324 is pressed on the second guide surface 3422, the first transmission key 340 is forced to rotate and compress the first elastic preload component 350 to disengage from the first transmission groove 312. In addition, when the release component 330 is in the initial state, the stop component 324 is able to stably maintain contact with the first guide surface 3421 through the recessed first corner and will not easily slide onto the second guide surface 3422 due to vibration and force the first transmission key 340 to disengage from the first transmission groove 312, thereby ensuring the stability of the transmission connection between the first transmission wheel 310 and the first transmission shaft 320 when the transmission device 300 is working normally; in addition, since the first elastic pre-tightening component 350 is in contact with the second corner, during the active release process of the release component 330, the width of the part of the first transmission key 340 clamped between the stop component 324 and the first elastic pre-tightening component 350 can become larger and larger, so that the stop component 324 is always in contact with the guide surface 342, thereby ensuring that the stop component 324 stops the axial movement of the first transmission key 340.

[0065] In order to make the stopper component 324 slide smoothly from the first guide surface 3421 to the second guide surface 3422 during the active release process, in this embodiment, the first guide surface 3421 and the second guide surface 3422 are connected by an arcuate surface transition, the first guide surface 3421 and the second guide surface 3422 are connected at an angle, or the first guide surface 3421 and the second guide surface 3422 are connected by an arcuate surface to form an arcuate surface. Such a design can prevent the stopper component 324 from getting stuck at the corner of the first corner, causing the stopper component 324 to be unable to slide to the second guide surface 3422, thereby causing the first transmission key 340 to be unable to be driven out of the first transmission groove 312 to implement active release; combined with the stopper component 324 having an arcuate stopper surface. Such a design can make the stopper component 324 and the guide surface 342 slide and cooperate more smoothly, so that the first transmission key 340 can be smoothly retracted into the second transmission groove 321.

[0066] It can be understood that in other embodiments of the present invention, the guide surface may also be a curved surface that convexes outward in a direction away from the second corner.

[0067] It can be understood that in other embodiments of the present invention, the limiting sleeve can form the above-mentioned stop component, and the end face of the limiting sleeve close to the first transmission wheel is connected to the inner side surface of the limiting sleeve through a chamfered transition, and the chamfer forms an arc-shaped stop surface. With such a design, during the process of active release of the release component, the axial movement of the first transmission key can be stopped by the stop component and slidably pressed on the second guide surface. The first transmission key is stopped by the stop component and rotates out of the first transmission groove and compresses the first elastic preload component.

[0068] In this embodiment, the first elastic preload component 350 includes an arched curved body 351 and legs 352 extending from both ends of the curved body 351, the legs 352 are supported on the bottom wall of the second transmission groove 321, the curved body 351 abuts against the second corner of the first transmission key 340 in the direction of the first transmission groove 312, and the two legs 352 are distributed along the axial interval and supported on the bottom surface of the second transmission groove 321. With such a design, the bending amplitude of the curved body 351 can be adjusted by adjusting the distance between the two legs 352, so as to adjust the preload force of the first elastic preload component 350; in addition, by distributing the two legs 352 along the axial interval, the first transmission key 340 can always keep in contact with the curved body 351 during the axial movement, without the need for the curved body 351 to be connected to the first transmission key 340, thereby eliminating the connection between the first elastic preload component 350 and the first transmission key 340, and making assembly simpler.

[0069] It can be understood that in other embodiments of the present invention, the first elastic preload component can also be a disc spring, a coil spring, a rubber spring or a combination thereof, one end of the first elastic preload component is connected to the bottom wall of the second transmission groove, and the other end is connected to the first transmission key.

[0070] In order to enable the transmission device 300 in this embodiment to have the function of overload protection, the engagement of the first transmission key 340 and the first transmission groove 312 in this embodiment is configured as follows: when the first transmission shaft 320 is subjected to an overload torque, a radial component force is generated to force the first transmission key 340 to disengage from the first transmission groove 312. With such a design, under a predetermined torque, the first transmission key 340 can maintain radial engagement with the first transmission groove 312 under the preload force of the first elastic preload component 350, at which time the first transmission wheel 310 and the first transmission shaft 320 are connected in transmission through the first transmission key 340, thereby achieving torque transmission; and when the load (patient) on the rigging 220 is overloaded, the radial component force received by the first transmission key 340 can cause the first transmission key 340 to overcome the first elastic preload component 350 and disengage from the first transmission groove 312, thereby disconnecting the transmission connection between the first transmission wheel 310 and the first transmission shaft 320, so that the two can be relatively idle to implement overload protection, and the first transmission shaft 320 as the power output Idling can quickly release the reverse torque applied by the load, thereby avoiding damage to the first transmission wheel 310. Since the reverse torque of the load cannot be transmitted to the first transmission wheel 310 receiving power, the first transmission wheel 310 receiving power is also avoided from being damaged by the reverse torque of the excessive load, thereby avoiding damage to the third transmission wheel 371, the reduction box 600 and the motor 100, and extending the service life of the transmission device 300, the reduction box 600 and the motor 100; finally, overload protection is implemented through the first transmission key 340, which also makes the overall structure simpler and more compact, and there is no need to set up an additional overload protection mechanism, thereby simplifying the transmission device 300.

[0071] It should be noted that, since the transmission device 300 in this embodiment is mainly used for a shift machine, the predetermined torque mentioned means that when the shift machine is in normal working condition, the first transmission key 340 is radially engaged with the first transmission groove 312, so that the first transmission shaft 320 and the first transmission wheel 310 can be connected to each other to transmit torque. When the first transmission wheel 310 outputs the working torque to the first transmission shaft 320 through the first transmission key 340, they are also subjected to the reverse torque from the load. In this embodiment, considering that the load exceeding the bearing limit of the shift machine may easily cause damage to the shift machine, it is necessary to set a threshold value for the working torque that can maintain the engagement of the first transmission key 340 with the first transmission groove 312 to realize the transmission of the first transmission wheel 310 and the first transmission shaft 320. When the shift machine is working normally (not overloaded), the reverse torque of the load will not exceed the threshold value, and the first transmission key 340 is in the first elastic Under the action of the preload component 350, the preload component 350 is engaged with the first transmission groove 312 to achieve the transmission of the working torque, thereby completing the transmission of power. Once an overload occurs, the reverse torque of the load exceeds the threshold value and is transmitted to the first transmission shaft 320 through the roller 210 and the second transmission wheel 360. The first transmission shaft 320 drives the first transmission key 340 to overcome the force of the first elastic preload component 350 and disengage from the first transmission groove 312 to disconnect the transmission of torque and thereby achieve overload protection. At this time, the first transmission shaft 320 is idle and cannot transmit the reverse torque of the load to the first transmission wheel 310, thereby preventing the first transmission wheel 310, the third transmission wheel 371, the reduction box 600 and the motor 100 from being damaged by the excessive reverse torque of the load. The above threshold value is the "predetermined torque", which is provided by the preload force applied by the first elastic preload component 350 to the first transmission key 340. In this embodiment, the preload force can be adjusted by replacing the first elastic preload component 350 with different elastic moduli, thereby achieving the adjustment of the predetermined torque.

[0072] In order to enable the first transmission key 340 to smoothly disengage from the first transmission groove 312 when overloaded, in this embodiment, the first transmission groove 312 gradually expands toward the disengagement direction of the first transmission key 340, that is, the radial cross-section of the first transmission groove 312 is a trapezoidal groove or a conical groove that gradually expands radially inward, and the first transmission key 340 gradually shrinks toward its engagement direction, that is, the radial cross-section of the first transmission key 340 is adapted to the radial cross-section of the first transmission groove 312. With such a design, a slow separation can be achieved when the first transmission key 340 disengages from the first transmission groove 312, and a slow contact can be achieved when the first transmission key 340 and the first transmission groove 312 are radially engaged, and the clutch is relatively stable, thereby reducing noise, extending the service life of the product, and providing a better user experience.

[0073] It can be understood that in other embodiments of the present invention, the radial cross-section of the first transmission groove is a trapezoidal groove or a conical groove that gradually expands radially inward; or, the radial cross-section of the first transmission key is a trapezoidal or conical groove that gradually contracts radially outward.

[0074] In the case of overload, although the rotation of the first transmission shaft 320 will cause the first transmission key 340 to engage with the first transmission groove 312 again, the load reverse torque will still force the first transmission key 340 to overcome the force of the first elastic preload component 350 and disengage from the first transmission groove 312 to disconnect the torque transmission, that is, during the entire idling process of the first transmission shaft 320, although there will be continuous clutching, the reverse torque of the load will not be transmitted to the first transmission wheel 310, thereby achieving overload protection.

[0075] Finally, at least two first transmission grooves 312 are arranged on the first transmission wheel 310 of the present embodiment at intervals along the circumferential direction of the shaft hole 311. With such a design, after solving the abnormal situation, when it is necessary to align the first transmission groove 312 with the second transmission groove 321 in a radial direction so that the first transmission key 340 can be radially engaged with the first transmission groove 312 again under the preload force of the first elastic preload component 350, it is not necessary to rotate the first transmission wheel 310 one circle to align one of the first transmission grooves 312 with the second transmission groove 321 in a radial direction. The more the number of the first transmission grooves 312 is arranged, the smaller the rotation angle of the first transmission wheel 310 is, thereby shortening the time required for the radial alignment of the first transmission groove 312 with the second transmission groove 321, and improving the user experience.

[0076] In this embodiment, the top ends of the first support frame 400 and the second support frame 500 are connected to the top plate 700, and the bottom ends of the first support frame 400 and the second support frame 500 are connected to the bottom plate 800. The first support frame 400, the second support frame 500, the top plate 700 and the bottom plate 800 form a shell, and the first transmission wheel 310, the second transmission wheel 360, the third transmission wheel 371 and the roller 210 are all located in the shell, and one end of the first transmission shaft 320 with a pull rod hole 322 is located outside the shell, and the release component 330 also includes a pull rope (not shown in the figure), and the pull rope is connected to the end of the release rod 331 away from the first transmission key 340. The transfer machine in this embodiment includes a track mechanism and a main machine. The main machine is connected to the track mechanism and can move along the track mechanism. The main machine is equipped with the motor 100, the lifting device 200 and the transmission device 300. The track mechanism adopts a conventional guide rail and is installed on the ceiling. The main machine can move along the guide rail. A fixed pulley located outside the shell is also fixed on the main machine. The pull rope passes around the fixed pulley and extends downward. In this way, the user can pull the release rod 331 from the initial state to the released state by pulling the pull rope downward. The operation is simple and convenient.

[0077] It can be understood that in other embodiments of the present invention, the first transmission shaft is directly connected to the reduction box. In this case, the first transmission wheel is directly engaged with the ring gear on the drum, thereby eliminating the second transmission wheel, thereby simplifying the structure of the transmission device. In this case, the first transmission shaft serves as a power receiving component, and the second transmission wheel serves as a power output component. When the first transmission wheel is subjected to an overload torque, it generates a radial component force that forces the first transmission key to disengage from the first transmission groove.

[0078] It can be understood that in other embodiments of the present invention, the first transmission wheel can also be one of a sprocket, a belt pulley and a friction wheel.

[0079] It can be understood that in other embodiments of the present invention, the side wall of the second transmission groove is provided with two waist-shaped holes extending along the axis of the second transmission shaft, and the two ends of the pin shaft are respectively arranged through the two waist-shaped holes, and the two ends of the pin shaft can slide relative to the waist-shaped holes along the axis of the second transmission shaft.

[0080] It can be understood that in other embodiments of the present invention, when both ends of the pin shaft are restricted so that the pin shaft can only move axially along the axis of the second transmission shaft, the release component may also include a spring, which is pressed between the pin shaft and the end of the waist-shaped hole or the end of the guide groove. The pin shaft is connected to a pull rope, and the main unit is also fixed with a fixed pulley located on the outside of the shell. The pull rope passes around the fixed pulley and extends downward. The user can pull the release rod from the initial state to the released state by pulling the pull rope downward. After releasing the pull rope, the spring drives the pin shaft to reset.

[0081] Embodiment 2

[0082] like Fig.12 and Fig.13As shown, different from the first embodiment, the second transmission wheel 360 and the first transmission shaft 320 in this embodiment establish radial coupling transmission through the second transmission key 1000 pre-tightened by the second elastic pre-tightening component 900 . Specifically, the first transmission shaft 320 is also provided with a third transmission groove 326 and an avoidance groove 327. The third transmission groove 326 runs through the avoidance groove 327. A radial stop plate 328 is connected to the avoidance groove 327 by screws. The second elastic preload component 900 is located in the third transmission groove 326 and is arranged between the radial stop plate 328 and the second transmission key 1000. The second transmission key 1000 has a transmission section 1100 that gradually shrinks toward its engagement direction. The second transmission wheel 360 is provided with a fourth transmission groove 361. The second transmission key 1000 makes the transmission section 1100 radially engage with the fourth transmission groove 361 under the preload force of the second elastic preload component 900 to realize the transmission connection between the second transmission wheel 360 and the first transmission shaft 320, thereby realizing the transmission of torque. When the second transmission wheel 360 is subjected to overload torque, it forces the second transmission key 1000 to disengage from the fourth transmission groove 361 to release the radial coupling and implement overload protection. With such a design, when the load is overloaded, the overload torque applied to the second transmission wheel 360 can force the second transmission key 1000 to release the radial coupling and implement overload protection, so as to prevent the reverse torque applied by the load from being transmitted to the first transmission shaft 320 serving as the power input, thereby avoiding the first transmission shaft 320 serving as the power input from being damaged by the reverse torque of the excessive load, that is, avoiding damage to the transmission device 300 and extending the service life of the transmission device 300; in addition, the first transmission key 340 can remove the overload protection function; or, in the case where the first transmission key 340 has the overload protection function, by making the overload protection function between the second transmission wheel 360 and the first transmission shaft 320, when the overload protection between the first transmission wheel 310 and the first transmission shaft 320 fails, the overload protection between the second transmission wheel 360 and the first transmission shaft 320 can be used to avoid transmitting the reverse torque applied by the load to the first transmission shaft 320.

[0083] It can be understood that in other embodiments of the present invention, when the second transmission wheel is engaged with the third transmission wheel and the first transmission wheel is engaged with the ring gear of the drum, the first transmission shaft is forced to disengage the second transmission key from the fourth transmission groove to release the radial coupling and implement overload protection when subjected to overload torque.

[0084] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A lifting machine with active release function, comprising a motor, a lifting device and a transmission device, wherein the motor drives the lifting device to move through the transmission device, and is characterized in that: The transmission device comprises: A first transmission wheel has an axial hole and a first transmission groove communicating with the axial hole; and The first transmission shaft passing through the shaft hole has a second transmission groove, the second transmission groove has a first transmission key and a first elastic preload component built therein, the first elastic preload component applies a preload force to the first transmission key, so that the first transmission key extends out of the second transmission groove and maintains radial engagement with the first transmission groove; and A release component is arranged at the shaft end of the first transmission shaft and extends into the second transmission groove to connect with the first transmission key. The release component drives the first transmission key to disengage from the first transmission groove to implement active release.

2. The transfer machine with active release function as claimed in claim 1, characterized in that: The release component includes a release rod, and the shaft end of the first transmission shaft is provided with a rod hole. The rod hole axially penetrates from the end face of the first transmission shaft to the second transmission groove. The release rod is installed in the rod hole and is hinged with the first transmission key.

3. The transfer machine with active release function as claimed in claim 2, characterized in that: The release rod presents an initial state and a released state through axial movement. During the axial movement from the initial state to the released state, the release rod drives the first transmission key to disengage from the first transmission groove. An elastic reset element for resetting the release rod to the initial state is configured in the rod hole.

4. The transfer machine with active release function as claimed in claim 3, characterized in that: The release rod is provided with a radial flange, and a shoulder and a retaining ring are axially spaced in the rod hole. The elastic reset element is pre-tightened between the radial flange and the retaining ring. When the release rod is in an initial state, the radial flange is stopped by the shoulder.

5. The transfer machine with active release function as claimed in claim 2, characterized in that: The release pull rod is hinged to the first transmission key via a pin shaft, and the first transmission shaft is provided with a first assembly hole for the pin shaft to pass through.

6. The transfer machine with active release function as claimed in claim 1, characterized in that: A guiding surface is provided on the first transmission key, and a stop component is provided on the first transmission shaft. During the active release process of the release component, the stop component stops the axial movement of the first transmission key and is slidably pressed on the guiding surface. The first transmission key is stopped by the stop component and rotates to disengage from the first transmission groove and compress the first elastic preload component. The axial movement of the first transmission key comes from the traction of the release component.

7. The transfer machine with active release function as claimed in claim 6, characterized in that: The guide surface includes a first guide surface and a second guide surface, the first guide surface and the second guide surface are connected to form a recessed first corner, and during the active release process of the release component, the stop component slides from the first guide surface to the second guide surface, and when the stop component is pressed on the second guide surface, the first transmission key disengages from the first transmission groove.

8. The transfer machine with active release function as claimed in claim 7, characterized in that: The first guide surface and the second guide surface are connected by an arcuate surface transition.

9. The transfer machine with active release function as claimed in claim 7, characterized in that: The first transmission key also includes a second protruding corner, the first elastic preload component acts on the second corner, the first transmission key has a free end and a connecting end connected to the release component, and the distance between the first corner and the second corner gradually increases from the connecting end to the free end.

10. The transfer machine with active release function according to claim 6, characterized in that: The stopping component has an arc-shaped stopping surface.

11. The transfer machine with active release function according to claim 6, characterized in that: The stop component is assembled in the second transmission groove, and the first transmission shaft is provided with a second assembly hole for the stop component to pass through.

12. The transfer machine with active release function according to claim 1, characterized in that: The first elastic preload component includes an arched curved body and legs extending from both ends of the curved body, the curved body abuts against the first transmission key in the direction of the first transmission groove, and the legs are supported on the bottom surface of the second transmission groove.

13. The transfer machine with active release function according to claim 1, characterized in that: The first elastic preload component is one of a disc spring, a coil spring, and a rubber spring, or a combination thereof.

14. The transfer machine with active release function according to claim 1, characterized in that: The engagement of the first transmission key with the first transmission groove is configured to generate a radial component force forcing the first transmission key to disengage from the first transmission groove when the first transmission wheel or the first transmission shaft is subjected to an overload torque.

15. The transfer machine with active release function according to claim 14, characterized in that: The first transmission groove gradually expands toward the disengagement direction of the first transmission key; and / or, the first transmission key gradually shrinks toward its engagement direction.

16. The transfer machine with active release function according to claim 1, characterized in that: At least two first transmission grooves are arranged on the first transmission wheel at intervals along the circumference of the shaft hole.

17. The transfer machine with active release function according to claim 1, characterized in that: The first transmission wheel is one of a gear, a sprocket, a pulley and a friction wheel.

18. The transfer machine with active release function according to claim 1, characterized in that: The transmission device also includes a second transmission wheel, which is mounted on the first transmission shaft. The second transmission wheel and the first transmission shaft establish a radial coupling transmission through a second transmission key pre-tightened by a second elastic pre-tightening component. When the second transmission wheel or the first transmission shaft is subjected to an overload torque, the second transmission key is forced to release the radial coupling to implement overload protection.

19. The transfer machine with active release function according to claim 1, characterized in that: The transfer machine further comprises a first support frame and a second support frame which are spaced apart from each other, two ends of the first transmission shaft are rotatably connected to the first support frame and the second support frame respectively, and the motor is mounted on the first support frame and / or the second support frame.

20. The transfer machine with active release function according to claim 19, characterized in that: The transfer machine is equipped with two motors, and the two motors are respectively installed on the first support frame and the second support frame. The transmission device also includes a second transmission shaft, and the two ends of the second transmission shaft are respectively rotatably connected to the first support frame and the second support frame. The second transmission shaft is driven to rotate by one motor or two motors, and the second transmission shaft transmits torque to the first transmission wheel.

Images