Displacement machine with active release function

Abstract

The utility model discloses a shifting machine with an active release function, which relates to the technical field of medical care equipment, solves the problem of low safety performance of the shifting machine, and comprises a motor, a lifting device and a transmission device, the transmission device comprises a torque input part, a torque output part and a coupling unit used for establishing axial coupling transmission between the torque input part and the torque output part. Elastic pre-tightening part used for applying acting force to torque input part or torque output part so as to enable the torque input part and the torque output part to keep axial coupling and release used for driving the torque input part or the torque output part to generate axial movement so as to enable a coupling unit to release coupling transmission between the torque input part and the torque output part to implement active release and a component. According to the shifting machine with the active release function, a patient can be prevented from being detained in the air, and the safety performance of the shifting machine is improved.

Description

Technical Field

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

[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. Common transfer machines in the prior art are all built with motors and lifting devices, that is, the motor is used to provide power to the lifting device to achieve the lifting of the patient by the transfer machine. However, during the process of the transfer machine lifting the patient, if there are abnormal conditions such as improper operation, power outage or mechanical failure, it is easy to cause the motor to stagnate or lock, and the transfer machine will not be able to lift the patient normally, causing the patient to be stranded in the air. This not only increases the risk of delaying the patient's treatment time, but also may cause further damage to the machine and cause the patient to fall suddenly, which has the serious consequence of increasing the possibility of safety accidents during the use of the transfer machine, making the safety performance of the transfer machine low, and therefore needs to be improved. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a transfer machine with an active release function which can improve the safety performance of the transfer machine.

[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 torque input member for receiving power input; and,

[0007] a torque output component for outputting power, wherein one of the torque input component and the torque output component can move axially relative to the other; and

[0008] a coupling unit, used to establish an axial coupling transmission between the torque input component and the torque output component; and

[0009] an elastic preload component, used to apply a force to an axially movable torque input component or a torque output component, so that the torque input component and the torque output component are axially coupled, and,

[0010] The release component is used to drive the torque input component or the torque output component to generate axial movement, so that the coupling unit releases the coupling transmission between the two and implements active release.

[0011] In the above-mentioned lifting machine with active release function, the coupling unit includes a spherical coupling body, the end surface of the torque input component is provided with a first coupling groove, and the end surface of the torque output component is provided with a second coupling groove, the first coupling groove and the second coupling groove respectively engage the spherical coupling body to establish axial coupling, and when the torque output component is subjected to overload torque, the torque output component forces the coupling unit to release the coupling transmission between the torque input component and the torque output component to implement overload protection.

[0012] In the above-mentioned lifting machine with active release function, the coupling unit includes a first concave-convex structure distributed circumferentially on the end surface of the torque input component and a second concave-convex structure distributed circumferentially on the end surface of the torque output component, and the first concave-convex structure and the second concave-convex structure are embedded in each other to establish axial coupling.

[0013] In the above-mentioned transfer machine with active release function, one of the first concave-convex structure and the second concave-convex structure is configured as an oblique convex tooth, and the other is configured as an oblique tooth groove, the oblique convex tooth is axially engaged in the oblique tooth groove, and when the torque output component is subjected to overload torque, the coupling unit is forced to release the coupling transmission between the torque input component and the torque output component to implement overload protection.

[0014] In the above-mentioned transfer machine with active release function, the transmission device also includes a transmission shaft, the transmission shaft includes an optical axis section and a transmission section, the torque output component is mounted on the optical axis section and can rotate relatively, and the torque input component is mounted on the transmission section to keep the two rotating synchronously in the circumferential direction and able to move axially relative to each other.

[0015] In the above-mentioned lift with active release function, the transmission section and the torque input component form a non-circular shaft hole fit or a keyway fit.

[0016] In the above-mentioned shifting machine with active release function, a first limiting shoulder and a second limiting shoulder are respectively arranged at both ends of the optical axis segment, the torque input component is axially limited by the elastic preload component and the first limiting shoulder, and the torque output component is axially limited by the second limiting shoulder and the torque input component.

[0017] In the above-mentioned lifting machine with active release function, the release component is connected to the torque input component and can drive the torque input component to move axially to release the coupling transmission with the torque output component, and the torque input component can rotate relative to the release component.

[0018] In the above-mentioned transfer machine with active release function, the transfer machine includes a carrier frame, the lifting device and the transmission device are assembled on the carrier frame, the release component is axially movably installed on the carrier frame, and one end of the release component extending out of the carrier frame is connected to the pull rope.

[0019] In the above-mentioned transfer machine with active release function, the release component includes a pull rod and a cavity arranged at one end of the pull rod, and a pull rod hole is arranged on the supporting frame. The pull rod passes through the pull rod hole and can move axially. One end of the torque input component can be rotatably extended into the cavity and is axially limited by a limit pin. The release component acts on the limit pin to drive the torque input component to move.

[0020] In the above-mentioned transfer machine with active release function, the release component includes a first sleeve and a second sleeve which are separately arranged, the first sleeve is connected to the pull rod, the second sleeve is docked on the first sleeve to enclose the cavity, and the second sleeve is provided with an assembly hole for the limit pin to pass through.

[0021] In the above-mentioned lifting machine with active release function, the transmission device further comprises a limit bracket, the limit bracket is attached to the support frame, and the elastic pre-tightening component is sleeved on the torque input component and is stopped and pre-tightened by the limit bracket.

[0022] In the above-mentioned lifting machine with active release function, the limiting bracket and the limiting pin limit the axial displacement of the pull rod.

[0023] In the above-mentioned lift with active release function, the elastic pre-tightening component is one of a disc spring, a coil spring, and a rubber spring, or a combination thereof.

[0024] In the above-mentioned lift with active release function, the torque output component is one of a gear, a sprocket, a pulley and a friction wheel.

[0025] In the above-mentioned lifting machine with active release function, the lifting device includes a drum and a rigging wound on the drum, the motor drives the drum to rotate through the transmission device, and the rotation of the drum drives the rigging to rise and fall.

[0026] In the above-mentioned transfer machine with active release function, the transfer machine includes a track mechanism and a main machine, the motor, the lifting device and the transmission device are arranged on the main machine, and the main machine is connected to the track mechanism and can move along the track mechanism.

[0027] Beneficial effects of the utility model:

[0028] 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: a torque input component for receiving power input; and a torque output component for outputting power, wherein one of the torque input component and the torque output component can produce axial movement relative to the other; and a coupling unit for establishing axial coupling transmission between the torque input component and the torque output component; and an elastic preload component for applying a force to the axially movable torque input component or the torque output component so that the torque input component and the torque output component maintain axial coupling, and a release component for driving the torque input component or the torque output component to produce axial movement so that the coupling unit releases the coupling transmission between the two and implements active release.

[0029] Under normal working conditions of the lift, the patient who needs to be lifted acts on the lifting device and generates a certain load on the lifting device due to the action of his own gravity. The load will generate a reverse torque on the torque output component. The torque input component receives the power input of the motor. The torque input component and the torque output component are coupled and transmit the working torque through the coupling unit to realize the transmission of power between the two. The torque output component then outputs the power to the lifting device, so that the motor drives the lifting device to move through the transmission device to realize the lifting of the patient. When the motor stagnates or locks, that is, the lifting device is suspended, the torque input component or the torque output component is driven by the release component to produce axial movement, so that the elastic preload component is elastically deformed under force, so that the coupling unit releases the coupling transmission between the torque input component and the torque output component, so that the torque output component can rotate relative to the torque input component, and the reverse torque still acts on the torque output component to make the torque output component idle, that is, the lifting device is moved again, so that the patient can descend under the action of his own gravity, thereby realizing the active release of the lift, preventing the patient from being stranded in the air, reducing the risk of safety accidents during the use of the lift, and improving the safety performance of the lift.

[0030] Furthermore, the transmission device further comprises a transmission shaft, the transmission shaft comprises an optical axis section and a transmission section, the torque output component is mounted on the optical axis section and can rotate relatively, the torque input component is mounted on the transmission section to keep the two rotating synchronously in the circumferential direction and can move relatively in the axial direction. The transmission section ensures that the torque input component can move relatively in the axial direction while enabling the transmission shaft to rotate synchronously with the torque input component in the circumferential direction, so that the transfer machine can transmit power to the torque input component by setting a transmission mechanism, and can also enable the motor to directly act on the transmission shaft and input power into the torque input component through the transmission shaft, so that the transfer machine can be suitable for more different use requirements, thereby improving the practicality of the transfer machine.

[0031] Furthermore, a first limiting shoulder and a second limiting shoulder are respectively provided at both ends of the optical axis segment, the torque input component is axially limited by the elastic preload component and the first limiting shoulder, and the torque output component is axially limited by the second limiting shoulder and the torque input component. The torque output component is located between the second limiting shoulder and the torque input component and is axially limited by the two, which reduces the risk of the torque output component being too far away from the axial movement of the transmission shaft and affecting the transmission between the torque output component and the lifting device; at the same time, the torque input component is axially limited by the elastic preload component and the first limiting shoulder, thereby ensuring that there is a certain gap between the torque input component and the torque output component in the coupled transmission state, preventing the two sides of the torque input component from being closely abutted against the torque output component and the second limiting shoulder, thereby reducing the resistance of the torque input component during rotation, thereby reducing the energy loss during transmission, and at the same time reducing the risk of the torque input component being unable to rotate due to excessive resistance, thereby improving the stability and transmission efficiency of the lifting machine.

[0032] Furthermore, the release component is connected to the torque input component and can drive the torque input component to move axially to release the coupling transmission with the torque output component, and the torque input component can rotate relative to the release component. The torque input component can rotate relative to the release component so that when the motor transmits power to the torque input component to rotate the torque input component, the release component can not rotate synchronously with the torque input component, that is, the torque input component can not transmit power to the release component, which reduces the energy loss in the transmission process and improves the transmission efficiency of the transfer machine; at the same time, the release component that does not rotate with the torque input component is more convenient for operators to operate, which improves the convenience of using the transfer machine.

[0033] Furthermore, the transfer machine includes a carrier frame, the lifting device and the transmission device are mounted on the carrier frame, the release component is axially movably mounted on the carrier frame, and one end of the release component extending from the carrier frame is connected to a pull rope. When the transfer machine is in normal use, the carrier frame is generally installed at a high place, so the release component is generally located at a high place. The setting of the pull rope is convenient for operators to operate at a low place, and at the same time enables operators to select a suitable force application direction according to their own situation, which is more convenient for operators to operate and improves the convenience of using the transfer machine.

[0034] Furthermore, the release component includes a first sleeve and a second sleeve which are separately arranged, the first sleeve is connected to the pull rod, the second sleeve is docked on the first sleeve to enclose the cavity, and the second sleeve is provided with an assembly hole for the limit pin to pass through. The arrangement of the assembly hole enables the operator to put the limit pin into the cavity through the assembly hole and install it on the torque input component, making the installation of the limit pin more convenient. At the same time, the first sleeve and the second sleeve are arranged separately to facilitate the adjustment of the limit pin. At the same time, when the pull rod needs to be replaced, it is only necessary to cancel the connection between the first sleeve and the second sleeve, without the need to disassemble and assemble the limit pin, making the replacement of the pull rod more convenient and improving the convenience of using the shifting machine.

[0035] Furthermore, the transmission device further comprises a limit bracket, the limit bracket is attached to the bearing frame, the elastic pre-tightening component is sleeved on the torque input component and is stopped and pre-tightened by the limit bracket. The limit bracket enables the elastic pre-tightening component to be directly sleeved on the support shaft, which facilitates the installation and replacement of the elastic pre-tightening component.

[0036] Furthermore, the limit bracket and the limit pin limit the axial displacement of the pull rod. The limit bracket and the limit pin limit the axial displacement of the pull rod, preventing the pull rod from being separated from the pull rod hole as a whole, reducing the risk of the pull rod being unable to slide axially due to the pull rod being separated from the pull rod hole as a whole, and ensuring the normal use of the active release function of the shifting machine; at the same time, it can also prevent the pull rod from moving the torque input component axially for too long a distance, causing the torque input component to be separated from the transmission shaft, reducing the risk of the torque input component being unable to reset after the drive of the release component is canceled, and ensuring the normal operation of the shifting machine after the motor is restored.

[0037] Furthermore, the lifting device includes a drum and a rigging wound on the drum, the motor drives the drum to rotate through the transmission device, and the rotation of the drum drives the rigging to be lifted and lowered. The patient acts on the rigging, the motor transmits the torque input component, and the torque output component transmits the torque to the drum, thereby realizing the lifting and lowering of the rigging, that is, realizing the lifting and lowering of the patient. The use of the drum and the rigging makes the lifting device occupy a smaller space, reducing the space required for the overall installation of the transfer machine.

[0038] Furthermore, the transfer machine includes a track mechanism and a host, the motor, the lifting device and the transmission device are arranged on the host, and the host is connected to the track mechanism and can move along the track mechanism. The host can move along the track mechanism so that the lifting device can be used to lift and lower the patient, and can also be used to transfer the patient, so that the transfer machine can be applied to more usage situations, and the practicality of the use of the transfer machine is improved.

[0039] 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

[0040] The utility model is further described below in conjunction with the accompanying drawings:

[0041] Figure 1 This is a schematic diagram of the overall structure of a transfer machine with an active release function in one embodiment of the utility model;

[0042] Figure 2 This is a schematic diagram of the structure of a carrier frame of a transfer machine with an active release function in one embodiment of the utility model;

[0043] Figure 3 This is a schematic diagram of the overall cross-sectional structure of a lift with an active release function when establishing axial coupling transmission in one embodiment of the utility model;

[0044] Figure 4 This is a schematic diagram of the structure of the torque input component when establishing axial coupling transmission of a transfer machine with an active release function in one embodiment of the utility model;

[0045] Figure 5 This is a schematic diagram of the transmission shaft structure of a transfer machine with an active release function in one embodiment of the utility model;

[0046] Figure 6 This is an enlarged structural diagram of point A of a transfer lift with an active release function in one embodiment of the present utility model;

[0047] Figure 7 This is a schematic diagram of the limit pin structure of a transfer machine with an active release function in one embodiment of the utility model;

[0048] Figure 8 This is a schematic diagram of the overall cross-sectional structure of a lift with an active release function in one embodiment of the utility model when the axial coupling transmission is cancelled;

[0049] Fig. 9 It is a schematic diagram of the structure of a coupling unit of a transfer machine with an active release function in one embodiment of the utility model.

[0050] Reference numerals:

[0051] 100, bearing frame; 110, tie rod hole; 120, limit bracket; 121, moving hole;

[0052] 200, active force transmission chain; 210, motor; 220, transmission shaft; 221, limit groove; 222, transmission section; 223, optical axis section; 224, first limit shoulder; 225, limit block; 226, second limit shoulder; 230, torque input component; 231, connecting groove; 232, connecting rod; 233, mounting hole; 235, third shoulder;

[0053] 300, passive force transmission chain; 310, torque output component; 320, transmission gear; 330, drum; 340, rigging;

[0054] 400, release member; 410, pull rod; 411, sliding hole; 412, pull rope; 420, cavity; 430, first sleeve; 440, second sleeve; 441, assembly hole;

[0055] 500, coupling unit; 510, first concave-convex structure; 511, oblique convex teeth; 520, second concave-convex structure; 521, oblique tooth grooves;

[0056] 600, elastic preload component;

[0057] 700, limit pin; 710, connecting hole; 720, notch; 730, arc groove;

[0058] 800, host;

[0059] 900. Track mechanism. DETAILED DESCRIPTION

[0060] The utility model proposes a lifting machine with active release function, which includes a motor, a lifting device and a transmission device. The motor drives the lifting device to move through the transmission device. The transmission device includes: a torque input component for receiving power input; and a torque output component for power output, one of the torque input component and the torque output component can produce axial movement relative to the other; and a coupling unit for establishing axial coupling transmission between the torque input component and the torque output component; and an elastic preload component for applying a force to the axially movable torque input component or torque output component so that the torque input component and the torque output component maintain axial coupling, and a release component for driving the torque input component or the torque output component to produce axial movement so that the coupling unit releases the coupling transmission between the two and implements active release. The above-mentioned lifting machine with active release function can prevent patients from being stranded in the air and improve the safety performance of the lifting machine.

[0061] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore should not be understood as a limitation on the present invention.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] Reference Figure 1 and Figure 2 The lifting machine with active release function proposed in one embodiment of the utility model includes a carrier frame 100, a motor 210, a lifting device and a transmission device. The motor 210, the lifting device and the transmission device are all arranged on the carrier frame 100. The motor 210 drives the lifting device to move through the transmission device. The lifting device includes a drum 330 and a rigging 340 wound on the drum 330. The motor 210 drives the rotation of the drum 330 through the transmission device, and the rotation of the drum 330 drives the rigging 340 to move up and down.

[0066] In this embodiment, the transfer machine further includes a track mechanism 900 and a host 800, the carrier 100 is configured on the host 800, and the host 800 is connected to the track mechanism 900 and can move along the track mechanism 900. Exemplary: the track mechanism 900 adopts a conventional guide rail and is installed on the ceiling, and the host 800 can move along the guide rail;

[0067] Reference Figure 2 and Figure 3 The transmission device includes a torque input component 230 for receiving power input, a torque output component 310 for outputting power, a coupling unit 500, an elastic preload component 600, and a release component 400. The torque input component 230 can move axially relative to the torque output component 310; the coupling unit 500 is used to establish an axial coupling transmission between the torque input component 230 and the torque output component 310; the elastic preload component 600 is used to apply a force to the axially movable torque input component 230 so that the torque input component 230 and the torque output component 310 maintain axial coupling; the release component 400 is used to drive the torque input component 230 to move axially so that the coupling unit 500 releases the coupling transmission between the two and implements active release. Exemplarily: the torque output component 310 adopts a conventional gear, and the elastic pre-tensioning component 600 adopts a conventional coil spring. The elastic pre-tensioning component 600 is located at the end of the torque output component 310 that is away from the torque input component 230. One end of the elastic pre-tensioning component 600 abuts against the torque input component 230, and the other end abuts against the support frame 100, that is, the elastic pre-tensioning component 600 is in an elastic deformation state, so that the elastic pre-tensioning component 600 applies a force to the torque input component 230.

[0068] In this embodiment, the transmission device further includes a transmission shaft 220, which is rotatably connected to the carrier 100, and the transmission shaft 220 includes an optical axis section 223 and a transmission section 222. The torque output component 310 is mounted on the optical axis section 223 and can rotate relatively, and the torque input component 230 is mounted on the transmission section 222 to keep the two rotating synchronously in the circumferential direction and can move relatively in the axial direction. For example: Figure 4 and Figure 5 As shown, limiting grooves 221 are provided on both sides of one end of the transmission shaft 220, and the end of the transmission shaft 220 with the limiting grooves 221 forms a transmission section 222. The end surface of the torque input component 230 close to the torque output component 310 is provided with a connecting groove 231 which is plugged into the transmission section 222, so that the transmission section 222 and the torque input component 230 form a non-circular shaft hole, thereby enabling the transmission shaft 220 to rotate synchronously with the torque input component 230.

[0069] In order to make the motor 210 drive the lifting device to move through the transmission device, the motor 210 transmits the torque to the torque input component 230, and the torque output component 310 transmits the torque to the roller 330. Figure 2 and Figure 3 As shown, the motor 210 is installed on one side of the carrier 100 , and the motor 210 is directly installed on one end of the transmission shaft 220 to drive the transmission shaft 220 to rotate; one end of the roller 330 is fixedly connected with a transmission gear 320 meshing with the torque output component 310 .

[0070] According to the transfer machine with active release function of this embodiment, the active force transmission chain 200 of the transfer machine includes a motor 210, a transmission shaft 220, and a torque input component 230, and the passive force transmission chain 300 includes a torque output component 310, a transmission gear 320, a roller 330 and a rigging 340, wherein the axial coupling transmission between the torque input component 230 and the torque output component 310 is realized by the coupling unit 500, that is, the power transmission between the active force transmission chain 200 and the passive force transmission chain 300 is realized. When the lift is in normal working state, the patient who needs to be lifted acts on the lifting device and generates a certain load on the lifting device due to the effect of his own gravity. The load will generate a reverse torque on the torque output component 310. The torque input component 230 and the torque output component 310 are coupled and transmit the working torque through the coupling unit 500, so that the active force transmission chain 200 can transmit the power to the passive force transmission chain 300, so that the motor 210 can transmit the power to the lifting device to achieve the lifting of the patient; when the motor 210 is stagnant or locked, that is, the lifting device stops moving and the patient is stagnant in the air, the release component 400 is operated to drive the torque input component 230 to generate axial movement , so that the elastic preload component 600 is elastically deformed under the force, so that the coupling unit 500 releases the coupling transmission between the torque input component 230 and the torque output component 310, so that the torque output component 310 can rotate relative to the torque input component 230, but the reverse torque still acts on the torque output component 310 to make the torque output component 310 idle, so that the transmission gear 320 rotates with the roller 330, so that the winding rigging 340 on the roller 330 can be extended, that is, the patient can descend under the action of his own gravity, thereby realizing the active release of the transfer machine, preventing the patient from being stranded in the air, reducing the risk of safety accidents during the use of the transfer machine, and improving the safety performance of the transfer machine.

[0071] According to the transfer machine with active release function of this embodiment, the elastic preload component 600 can absorb and buffer the impact and vibration generated by the coupling unit 500 on the torque input component 230 during the process of releasing the coupling transmission of the coupling unit 500, thereby reducing the influence of noise and impact energy during the process of releasing the coupling transmission and improving the stability and comfort of the transfer machine.

[0072] Preferably, the two ends of the optical axis section 223 are respectively provided with a first limiting shoulder 224 and a second limiting shoulder 226, the torque input component 230 is axially limited by the elastic preload component 600 and the first limiting shoulder 224, and the torque output component 310 is axially limited by the second limiting shoulder 226 and the torque input component 230. Figure 4 and Figure 5 As shown, there is a height difference between the circumferential side wall of the optical axis section 223 near one end of the transmission section 222 and the groove wall of the limiting groove 221 to form a first limiting shoulder 224, and the other end of the optical axis section 223 is fixedly connected to the limiting block 225 to form a second limiting shoulder 226. The torque output component 310 is located between the second limiting shoulder 226 and the torque input component 230 and is axially limited by the second limiting shoulder 226 and the torque input component 230, which reduces the axial movement distance of the torque output component 310 relative to the transmission shaft 220 and affects the torque output component 310 and the transmission gear 320. The risk of matching; at the same time, the torque input component 230 is axially limited by the elastic preload component 600 and the first limiting shoulder 224, so as to ensure that there is a certain gap between the torque input component 230 and the torque output component 310 in the coupled transmission state, preventing the two sides of the torque input component 230 from being closely abutted against the torque output component 310 and the second limiting shoulder 226 respectively to affect its own rotation, and reducing the resistance encountered by the torque input component 230 during rotation, thereby reducing the energy loss during the transmission process and improving the stability and transmission efficiency of the transfer machine.

[0073] In the above technical solution, the host 800 can move along the track mechanism 900 so that the patient can be lifted and lowered by the lifting device and the patient can be transferred, so that the transfer machine can be applied to more usage situations and the practicality of the transfer machine is improved.

[0074] In the above technical solution, the lifting device uses the roller 330 and the rigging 340, so that the lifting device occupies a smaller space, thereby reducing the space required for the overall installation of the transfer machine.

[0075] In the above technical solution, the transmission section 222 ensures that the torque input component 230 can move axially relative to each other, while enabling the transmission shaft 220 to rotate synchronously with the torque input component 230 in the circumferential direction. This allows the transfer machine to transmit power to the torque input component 230 through the motor 210 by setting a transmission mechanism, and also allows the motor 210 to directly act on the transmission shaft 220 and input power into the torque input component 230 through the transmission shaft 220. This allows the transfer machine to be suitable for more different usage requirements, thereby improving the practicality of the transfer machine.

[0076] In the above-mentioned embodiment of the utility model, the cooperation between the transmission shaft 220 and the torque input component 230 is not limited to the cooperation of non-circular shaft holes, and keyway cooperation can also be adopted. For example, the torque output component 310 is provided with a plug-in groove for plugging with the transmission shaft 220, and a flat key is installed between the transmission shaft 220 and the groove wall of the plug-in groove. The circumferential side wall of the transmission shaft 220 and the groove wall of the plug-in groove are respectively provided with corresponding first placement groove and second placement groove, and the flat key is installed and plugged in the first placement groove and the second placement groove, and the flat key can slide in the first placement groove or the second placement groove.

[0077] In the above-mentioned embodiment of the utility model, the transmission of the motor 210 to the torque output component 310 is not limited to the motor 210 directly acting on the transmission shaft 220, and the motor 210 can also transmit power to the torque input component 230 by setting a transmission mechanism. For example, the torque input component 230 adopts conventional gears, and the transmission mechanism includes a rotating shaft rotatably connected to the carrier frame 100 and a driving gear fixedly connected to the rotating shaft. The driving gear is meshed with the torque input component 230, and the motor 210 directly acts on the rotating shaft and can drive the rotating shaft to rotate.

[0078] In the above-mentioned embodiment of the utility model, the torque output component 310 is not limited to the gear, and one of a sprocket, a pulley and a friction wheel can also be selected according to actual needs. For example, the torque output component 310 adopts a sprocket, and the roller 330 is fixedly connected to the driven sprocket. The torque output component 310 and the driven sprocket are connected by a chain to realize the transmission of torque.

[0079] In the above-mentioned embodiment of the utility model, the elastic preload component 600 is not limited to the coil spring. According to actual needs, one of the butterfly springs and rubber springs or a combination thereof can also be selected. For example, a rubber spring can be connected in parallel inside the coil spring. The rubber spring can provide a better shock absorbing effect and is not easy to cause mechanical damage. The rubber spring has a small elastic modulus and has a large elastic deformation after being loaded, which can provide a smoother buffering effect.

[0080] In one embodiment of the utility model, based on the transfer machine with active release function described in the above embodiment: the release component 400 is connected to the torque input component 230 and can drive the torque input component 230 to move axially to release the coupling transmission with the torque output component 310, and the torque input component 230 can rotate relative to the release component 400.

[0081] In this embodiment, the release component 400 is axially movably mounted on the carrier 100, for example: Figure 4 and Figure 5As shown, the release component 400 includes a pull rod 410 and a cavity 420 opened at one end of the pull rod 410, the support frame 100 is provided with a pull rod hole 110, the pull rod 410 passes through the pull rod hole 110 and can move axially; the pull rod 410 is provided with a sliding hole 411 connected to the cavity 420 at one end close to the torque input component 230, and the torque input component 230 is fixedly connected with a connecting rod 232 on the side away from the torque output component 310, one end of the connecting rod 232 can be rotatably extended into the cavity 420 through the sliding hole 411 and is provided with a mounting hole 233, and a limiting pin 700 is installed in the mounting hole 233, so that the torque input component 230 is axially limited by the limiting pin 700, and the release component 400 acts on the limiting pin 700 to drive the torque input component 230 to move.

[0082] According to the shifting machine with active release function of this embodiment, when the motor 210 is stagnant or locked, a pulling force is applied to the pull rod 410, so that the pull rod 410 slides axially in the direction away from the torque input component 230. Since the limit pin 700 is located in the cavity 420 of the pull rod 410, that is, during the sliding process of the pull rod 410, the limit pin 700 will abut and cooperate with the cavity wall of the cavity 420, so that the pull rod 410 will drive the torque input component 230 to slide axially together, so that the elastic preload component 600 is elastically deformed under the force, so that the coupling unit 5 00The coupling transmission between the torque input component 230 and the torque output component 310 is released, so that the torque output component 310 can rotate relative to the torque input component 230, and the reverse torque acts on the torque output component 310 to make the torque output component 310 idle, and the lifting device is activated again to make the patient descend, that is, the patient can descend under the action of his own gravity, thereby realizing the active release of the transfer machine, preventing the patient from being stranded in the air, reducing the risk of safety accidents during the use of the transfer machine, and improving the safety performance of the transfer machine.

[0083] In the above technical solution, the torque input component 230 can rotate relative to the release component 400 so that when the lift machine works normally, that is, the active force transmission chain 200 transmits power to the passive force transmission chain 300 to move the lifting device, the motor 210 will transmit power to the torque input component 230 through the transmission shaft 220, so that the transmission shaft 220 and the torque input component 230 rotate synchronously, and the limit pin 700 on the torque input component 230 will idle in the cavity 420, that is, it will not drive the pull rod 410 to rotate, so that the release component 400 can rotate synchronously with the torque input component 230, that is, when the torque input component 230 rotates, it can not transmit power to the release component 400, thereby reducing the energy loss in the transmission process and improving the transmission efficiency of the lift machine; at the same time, the pull rod 410 that does not rotate with the torque input component 230 is more convenient for the operator to operate, thereby improving the convenience of using the lift machine.

[0084] In order to facilitate the installation of the stop pin 700 into the installation hole 233 on the torque input component 230, the release component 400 includes a first sleeve 430 and a second sleeve 440 arranged separately, as shown in FIG. Figure 4 and Figure 6 As shown, the first sleeve 430 is fixedly connected to one end of the pull rod 410 close to the torque input component 230, and the second sleeve 440 is threadedly connected to the first sleeve 430 to enclose a cavity 420. The second sleeve 440 is provided with an assembly hole 441 for the limit pin 700 to pass through, and the sliding hole 411 is provided on the second sleeve 440. The arrangement of the assembly hole 441 facilitates the placement of the limit pin 700 into the cavity 420 and installation into the installation hole 233. At the same time, the first sleeve 430 and the second sleeve 440 are arranged separately to facilitate the adjustment operation of the limit pin 700. At the same time, when the pull rod 410 needs to be replaced, it is only necessary to cancel the connection between the first sleeve 430 and the second sleeve 440, without disassembling the limit pin 700, so that the replacement of the pull rod 410 is more convenient, and the convenience of using the shifting machine is improved.

[0085] Since the host 800 is installed on the track mechanism 900 on the ceiling, the release component 400 is located at a high place. In order to facilitate the operator to operate the release component 400 at a high place, one end of the release component 400 extending out of the carrier 100 is connected to the pull rope 412. Figure 4 As shown, one end of the pull rod 410 extends out of one end of the carrier frame 100 and is equipped with a pull rope 412, one end of the pull rope 412 is fixedly connected to the pull rod 410, and the operator can operate the pull rod 410 through the other end of the pull rope 412, which is more convenient for the operator to operate at a low place. At the same time, since the pull rope 412 is made of soft materials such as nylon, the force direction of the pull rope 412 by the operator is adjustable, so that the operator can choose a suitable force application angle according to his own situation, which further facilitates the operator to operate the release component 400 and improves the convenience of using the transfer machine.

[0086] Reference Figure 4 and Figure 6 Preferably, the diameter of the sliding hole 411 is larger than the cross-sectional diameter of the connecting rod 232, and the central axes of the torque input component 230, the connecting rod 232 and the sliding hole 411 are arranged to overlap, that is, there is a certain gap between the connecting rod 232 and the hole wall of the sliding hole 411, thereby preventing the pull rod 410 from rotating with the torque input component 230 under the action of friction, ensuring that the torque input component 230 does not transmit power to the release component 400 when rotating to reduce energy loss in the transmission process, thereby ensuring the transmission efficiency of the shifting machine;

[0087] Preferably, a fixed pulley corresponding to the pull rod hole 110 is fixedly connected to the main unit 800, and one end of the pull rope 412 is fixedly connected to the pull rod 410. The pull rope 412 passes through the fixed pulley, so that no matter how the operator changes the force angle of the other end of the pull rope 412, the pull rope 412 will generate a pulling force on the pull rod 410 along its own central axis, thereby ensuring that the pull rod 410 can slide axially when the operator operates, thereby improving the stability of the shifting machine.

[0088] Reference Figure 6 and Figure 7 Preferably, the limiting pin 700 is provided with a connecting hole 710 connecting the two ends, the circumferential side wall of the limiting pin 700 is provided with a notch 720 connecting the connecting hole 710, the circumferential outer diameter of the limiting pin 700 is larger than the aperture of the mounting hole 233, and the circumferential side wall of the limiting pin 700 at one end away from the assembly hole 441 is provided with an arc groove 730 so that the circumferential outer diameter of one end of the limiting pin 700 is smaller than the aperture of the mounting hole 233. The limiting pin 700 is made of elastic material such as plastic, so that when the limiting pin 700 needs to be installed in the mounting hole 233, the limiting pin can be inserted into the mounting hole 233 due to the setting of the arc groove 730. As the limiting pin 700 is inserted into the mounting hole 233, the hole wall of the mounting hole 233 presses against the limiting pin. The limit pin 700 applies pressure to cause elastic deformation of the limit pin 700 and keep the tendency to reset, that is, the distance between the two sides of the notch is reduced, even if the circumferential outer diameter of the limit pin 700 is reduced and inserted into the mounting hole 233, and the limit pin 700 keeps the tendency to reset, so that the circumferential outer wall of the limit pin 700 is tightly abutted against the hole wall of the mounting hole 233, and the friction force between the limit pin 700 and the hole wall of the mounting hole 233 makes the limit pin 700 fixed relative to the connecting rod 232, so that the operator only needs to insert the limit pin 700 when installing it, and there is no need to use other materials or operations to fix it after the limit pin 700 is inserted, which facilitates the installation of the shifting machine and improves the convenience of the shifting machine.

[0089] In the above-mentioned embodiment of the utility model, the driving of the pull rod 410 is not limited to manual driving, and the pull rod 410 can also be electrically driven to move. For example, a telescopic cylinder is installed on the carrier frame 100, and one end of the piston rod of the telescopic cylinder is fixedly connected to a connecting block and the other end is fixedly connected to the carrier frame 100. The connecting block is fixedly connected to one end of the pull rod 410 extending out of the carrier frame 100.

[0090] In one embodiment of the present invention, based on the above-mentioned embodiment of the lift with active release function: the transmission device further includes a limit bracket 120, the limit bracket 120 is attached to the carrier 100, and the elastic pre-tightening component 600 is sleeved on the torque input component 230 and is stopped and pre-tightened by the limit bracket 120. For example: Figure 4 and Figure 6As shown, the limiting bracket 120 is connected to the carrier 100 by fixing screws, the limiting bracket 120 is located on the side of the torque input component 230 away from the torque output component 310, the circumferential outer wall of the torque input component 230 is provided with a third shaft shoulder 235, the large diameter end of the torque input component 230 is located on the side of the torque input component 230 close to the torque output component 310, the small diameter end of the torque input component 230 is located on the side of the torque input component 230 away from the torque output component 310, the elastic preload component 600 is sleeved on the small diameter end of the torque input component 230, one end of the elastic preload component 600 is abutted with the third shaft shoulder 235, and the other end is abutted with the limiting bracket 120. The limiting bracket 120 enables the elastic preload component 600 to be directly sleeved on the support shaft without fixing one end of the elastic preload component 600, which is convenient for installation and replacement of the elastic preload component 600.

[0091] In order to ensure the normal use of the active release function of the transfer machine, the limiting bracket 120 and the limiting pin 700 limit the axial displacement of the pull rod 410, for example: Figure 4 and Figure 6 As shown, the limit bracket 120 is provided with a movable hole 121, and the connecting rod 232 is slidably connected in the movable hole 121, and the aperture of the movable hole 121 is smaller than the diameter of the small diameter end of the torque input component 230; if the pull rod 410 slides too far in the direction close to the torque input component 230, the pull rod 410 will abut the limit bracket 120, thereby preventing the pull rod 410 from continuing to slide toward the side close to the torque input component 230, preventing the pull rod 410 from entering the pull rod hole 110 on the side close to the torque input component 230 as a whole and disengaging from the pull rod hole 110, reducing the risk of the pull rod 410 being unable to slide axially due to the pull rod 410 being completely separated from the pull rod hole 110, thereby ensuring the normal use of the active release function of the shifting machine; at the same time, if the pull rod 410 When the rod 410 slides too far away from the torque input component 230, the limit pin 700 will abut and cooperate with the wall of the cavity 420 of the pull rod 410, and the torque input component 230 will abut and cooperate with the limit bracket 120 to limit the slippage of the torque input component 230, that is, to prevent the pull rod 410 from continuing to slide toward the side away from the torque input component 230, thereby preventing the pull rod 410 from moving axially with the torque input component 230 for too long a distance, causing the torque input component 230 to disengage from the transmission shaft 220, reducing the risk that the torque input component 230 cannot be reset after the drive of the release component 400 is canceled, resulting in the inability to establish axial coupling transmission with the torque output part again, thereby ensuring the subsequent normal operation of the shifting machine.

[0092] Reference Figure 4 and Figure 6Preferably, the aperture of the movable hole 121 is larger than the cross-sectional diameter of the connecting rod 232, and the central axis of the movable hole 121 is arranged to coincide with the central axis of the connecting rod 232, to prevent the limit bracket 120 from generating friction on the torque input component 230 and affecting the rotation of the torque input component 230 when the torque input component 230 rotates, thereby reducing energy loss during the transmission process.

[0093] In one embodiment of the utility model, based on the above-mentioned embodiment of the lifting machine with active release function: the coupling unit 500 includes a spherical coupling body, the end surface of the torque input component 230 is provided with a first coupling groove, the end surface of the torque output component 310 is provided with a second coupling groove, the first coupling groove and the second coupling groove respectively engage the spherical coupling body to establish axial coupling, and the torque output component 310 forces the coupling unit 500 to release the coupling transmission between the torque input component 230 and the torque output component 310 when subjected to overload torque to implement overload protection. Exemplary: the spherical coupling body adopts a conventional spherical steel ball, and the number is multiple, the number of the first coupling groove and the second coupling groove are both multiple and arranged in a one-to-one correspondence with the spherical coupling body, the multiple first coupling grooves are evenly arranged along the circumferential direction of the torque input component 230, the multiple second coupling grooves are evenly arranged along the circumferential direction of the torque output component 310, the first coupling groove and the second coupling groove respectively engage the corresponding spherical coupling body, that is, the groove walls of the first coupling groove and the second coupling groove are both arranged in an arc surface and adapted to the arc surface of the spherical coupling body.

[0094] According to the transfer machine with active release function of this embodiment, when the transfer machine is working normally, the first coupling groove and the second coupling groove respectively keep engaging with the corresponding spherical coupling body, that is, the spherical coupling body abuts and cooperates with the groove walls of the first coupling groove and the second coupling groove, so as to establish the axial coupling transmission between the torque input component 230 and the torque output component 310; when the motor 210 is stagnant or locked, that is, the lifting device is suspended to make the patient stagnate in the air, by operating the release component 400, the release component 400 drives the torque input component 230 to produce axial movement, so that the elastic preload component 600 is elastically deformed under force, so that the spherical coupling body is separated from the corresponding first coupling groove, thereby releasing the coupling transmission between the torque input component 230 and the torque output component 310, so that the torque output component 310 can rotate relative to the torque input component 230, and the reverse torque acts on the torque output component 310 to make the torque output component 310 idle, and the lifting device is operated again to make the patient descend, thereby realizing the active release of the transfer machine, preventing the patient from being stranded in the air, reducing the risk of safety accidents during the use of the transfer machine, and improving the safety performance of the transfer machine.

[0095] According to the shifting machine with active release function of this embodiment, the elastic pre-tightening component 600 applies a force to the torque input component 230 to set a threshold value for the working torque that maintains the coupling transmission between the torque input component 230 and the torque output component 310. When the load is small and the shifting machine works normally, the reverse torque of the load will not exceed the threshold value. The first coupling groove and the second coupling groove respectively engage the spherical coupling body to establish axial coupling and transmit the working torque. Once the load is too large, that is, overload, the reverse torque of the load will exceed the threshold value. At this time, the reverse torque of the load is the "overload torque" mentioned in the utility model. The arc surface of the spherical coupling body is set so that under the interaction of forces, the spherical coupling body will apply a thrust extending along the axial direction of the support shaft to the groove wall of the first coupling groove, and the thrust is greater than the pre-tightening force, so that the elastic pre-tightening component 600 is elastically deformed under the force and maintains the complex The spherical coupling body is disengaged from the first coupling groove to release the coupling transmission between the torque input component 230 and the torque output component 310, so that the torque output component 310 idles and does not transmit the reverse torque of the load to the torque input component 230, thereby avoiding the torque input component 230, the driving gear, the transmission shaft 220 and the transmission chain of the motor 210 in the active transmission chain from being worn or damaged due to the excessive load reverse torque. At the same time, since the torque output component 310 idles, the torque output component 310 and the transmission gear 320 in the passive force transmission chain 300 are also avoided from being worn or damaged due to the excessive load reverse torque, thereby realizing the overload protection of the shifting machine, prolonging the service life of the shifting machine, reducing the risk of safety accidents caused by damage to the shifting machine, and improving the safety performance of the shifting machine.

[0096] According to the shifting machine with active release function of this embodiment, when the release component 400 cancels the drive of the torque input component 230 or the torque output component 310 or makes the reverse torque of the load lower than the overload torque again, the elastic preload component 600 is reset, so that the torque input component 230 is reset to slip, and when the motor 210 can operate normally, the torque input component 230 is rotated. During this rotation process, the spherical coupling body will engage with the corresponding first coupling body again, so that the torque input component 230 and the torque output component 310 can establish axial coupling transmission through the coupling unit 500 again. At this time, the torque input component 230 and the torque output component 310 can transmit torque to each other again, so that the active force transmission chain 200 can transmit power to the passive force transmission chain 300 again, so that the shifting machine can work normally after the motor 210 is restored, thereby ensuring the subsequent normal use of the shifting machine.

[0097] In the above technical solution, the torque input component 230 can slide axially relative to the transmission shaft 220, the elastic pre-tightening component 600 is located on the side of the torque input component 230 away from the torque output component 310, and the release component 400 acts on the torque input component 230, so that the elastic pre-tightening component 600 can maintain the coupling transmission between the torque input component 230 and the torque output component 310 when the transfer machine realizes the active release function, and can also set a threshold value for the working torque that maintains the coupling transmission between the torque input component 230 and the torque output component 310 when the transfer machine realizes the overload protection function. There is no need to add another elastic pre-tightening structure to set the threshold value of the working torque in the transfer machine to realize the overload protection function, which makes the structure of the transfer machine simpler, that is, makes it more convenient to install, and reduces the cost of the transfer machine.

[0098] Preferably, the groove wall area of ​​the first coupling groove is smaller than half of the surface area of ​​the spherical coupling body, that is, while ensuring that the torque input component 230 can apply a thrust along the axial direction of the support shaft to the spherical coupling body through the groove wall of the first coupling groove, the contact area between the first coupling groove and the spherical coupling body is reduced, which makes it easier to disengage the first coupling groove from the spherical coupling body, reduces the risk of being unable to release the coupling transmission due to excessive contact area between the first coupling groove and the spherical coupling body, and improves the stability of the use of the shifting machine.

[0099] In one embodiment of the utility model, based on the above-mentioned embodiment of the lift with active release function: the coupling unit 500 includes a first concave-convex structure 510 distributed circumferentially on the end surface of the torque input component 230 and a second concave-convex structure 520 distributed circumferentially on the end surface of the torque output component 310, and the first concave-convex structure 510 and the second concave-convex structure 520 are embedded in each other to establish axial coupling. For example: Figure 4 and Figure 8 As shown, the first concave-convex structure 510 is a plurality of convex teeth fixedly connected to one end of the torque input component 230 near the torque output component 310, and the second concave-convex structure 520 is a plurality of grooves fixedly connected to one end of the torque output component 310 and corresponding to the convex teeth. The plurality of convex teeth are evenly arranged along the circumference of the torque input component 230, and the plurality of grooves are evenly arranged along the circumference of the torque output component 310. The convex teeth are adapted to the corresponding grooves and can axially engage with the corresponding grooves.

[0100] According to the transfer machine with active release function of this embodiment, when the transfer machine is working normally, the convex teeth are embedded in the corresponding grooves, thereby establishing an axial coupling transmission between the torque input component 230 and the torque output component 310; when the motor 210 is stagnant or locked, that is, the lifting device is suspended to cause the patient to stagnate in the air, by operating the release component 400, the release component 400 drives the torque input component 230 to produce axial movement, so that the elastic preload component 600 is elastically deformed under force, so that the convex teeth are disengaged from the corresponding grooves, thereby releasing the coupling transmission between the torque input component 230 and the torque output component 310, so that the torque output component 310 can rotate relative to the torque input component 230, and under the action of the reverse torque, the lifting device is activated again to allow the patient to descend, thereby realizing the active release of the transfer machine, preventing the patient from being stranded in the air, reducing the risk of safety accidents during the use of the transfer machine, and improving the safety performance of the transfer machine.

[0101] In order to further improve the safety performance of the transfer machine, one of the first concave-convex structure 510 and the second concave-convex structure 520 is an oblique convex tooth 511, and the other is an oblique tooth groove 521. The oblique convex tooth 511 is axially engaged in the oblique tooth groove 521. When the torque output component 310 is subjected to an overload torque, it forces the coupling unit 500 to release the coupling transmission between the torque input component 230 and the torque output component 310 to implement overload protection. For example, as Figure 8 and Fig. 9As shown, the two side surfaces of the convex teeth are arranged to face each other in an inclined manner relative to the axial direction of the transmission shaft 220 to form an inclined convex tooth 511, and the groove is adapted to the inclined convex tooth 511, that is, the groove walls on both sides of the groove are arranged to face the axial direction of the transmission shaft 220 to form an inclined tooth groove 521, and the inclined convex tooth 511 is axially engaged in the corresponding inclined tooth groove 521. When the load is too large, i.e., overloaded, that is, the reverse torque of the load is an overload torque, due to the inclined surface setting of the oblique convex tooth 511 and the oblique tooth groove 521, under the interaction of forces, the groove wall of the oblique tooth groove 521 will apply a thrust greater than the force applied by the elastic preload component 600 and in the axial direction of the transmission shaft 220 to the oblique convex tooth 511, and the thrust is greater than the force, so that the torque input component 230 moves axially, and the elastic preload component 600 is elastically deformed under the force and maintains a tendency to reset, so that the oblique protrusion is separated from the oblique tooth groove 521 to release the coupled transmission of the torque input component 230 and the torque output component 310, so that the torque output component 310 is The torque input component 230 does not rotate idly and does not transmit the reverse torque of the load to the torque input component 230, thereby preventing the torque input component 230, the driving gear, the transmission shaft 220 and the transmission chain of the motor 210 in the active transmission chain from being worn or damaged due to the excessive reverse torque of the load. At the same time, since the torque output component 310 rotates idly, the torque output component 310 and the transmission gear 320 in the passive force transmission chain 300 are also prevented from being worn or damaged due to the excessive reverse torque of the load, thereby realizing the overload protection of the transfer machine, prolonging the service life of the transfer machine, reducing the risk of safety accidents caused by damage to the transfer machine, and improving the safety performance of the transfer machine.

[0102] In the above technical solution, the torque input component 230 can slide axially relative to the transmission shaft 220, the elastic pre-tightening component 600 is located on the side of the torque input component 230 away from the torque output component 310, and the release component 400 acts on the torque input component 230, so that the elastic pre-tightening component 600 can maintain the coupling transmission of the torque input component 230 and the torque output component 310 when the transfer machine realizes the active release function, and can also set a threshold value for the working torque that maintains the coupling transmission of the torque input component 230 and the torque output component 310 when the transfer machine realizes the overload protection function. There is no need to add another elastic pre-tightening structure to set the threshold value of the working torque in order to realize the overload protection function of the transfer machine, which makes the structure of the transfer machine more concise, that is, makes the installation more convenient, and reduces the cost of the transfer machine.

[0103] In one of the embodiments of the present invention, the torque output component can also be axially moved and sleeved on the optical axis section, while the torque input component is axially limited on the transmission section. The torque output component includes a gear section meshing with the transmission gear and a smooth cylindrical section arranged on the side of the gear section away from the torque input component. The cylindrical section runs through the support frame. The elastic preload component is sleeved on the cylindrical section and pressed between the gear section and the support frame. The part of the cylindrical section located on the outside of the support frame is provided with an annular groove. The release component includes a release rod, a release connecting rod and two symmetrically arranged shift forks. The shift fork includes a shift fork head and a shift fork body. The shift fork body is inserted into the annular groove. The shift fork bodies of the two shift forks cooperate to form a snap ring that is engaged with the annular groove. The shift fork body can be relatively engaged. The slot rotates, and the two fork heads are respectively connected with the release rods extending in the direction away from the torque output component. The ends of the two release rods away from the fork heads are connected and fixed by a release link. A pull rope is provided at the center of the release link. A fixed pulley is fixedly connected to the main engine. The free end of the pull rope passes around the fixed pulley and extends downward for the operator to pull, so that the operator can pull the release link along the axial direction of the transmission shaft in the direction away from the torque input component after applying force to the pull rope. The axial movement of the release link drives the axial movement of the fork through the release rod. The axial movement of the fork drives the axial movement of the torque output component through the slot and compresses the elastic preload component, so that the coupling unit releases the coupling transmission between the two and implements active release.

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 torque input member for receiving power input; and, a torque output component for outputting power, wherein one of the torque input component and the torque output component can move axially relative to the other; and a coupling unit, used to establish an axial coupling transmission between the torque input component and the torque output component; and an elastic preload component, used to apply a force to an axially movable torque input component or a torque output component, so that the torque input component and the torque output component are axially coupled, and, The release component is used to drive the torque input component or the torque output component to generate axial movement, so that the coupling unit releases the coupling transmission between the two and implements active release.

2. The transfer machine with active release function as claimed in claim 1, characterized in that: The coupling unit includes a spherical coupling body, a first coupling groove is provided on the end surface of the torque input component, and a second coupling groove is provided on the end surface of the torque output component. The first coupling groove and the second coupling groove respectively engage with the spherical coupling body to establish axial coupling. When the torque output component is subjected to overload torque, the coupling unit is forced to release the coupling transmission between the torque input component and the torque output component to implement overload protection.

3. The transfer machine with active release function as claimed in claim 1, characterized in that: The coupling unit includes a first concave-convex structure distributed circumferentially on the end surface of the torque input component and a second concave-convex structure distributed circumferentially on the end surface of the torque output component. The first concave-convex structure and the second concave-convex structure are embedded in each other to establish axial coupling.

4. The transfer machine with active release function as claimed in claim 3, characterized in that: One of the first concave-convex structure and the second concave-convex structure is configured as an oblique convex tooth, and the other is configured as an oblique tooth groove. The oblique convex tooth is axially engaged in the oblique tooth groove. When the torque output component is subjected to an overload torque, the coupling unit is forced to release the coupling transmission between the torque input component and the torque output component to implement overload protection.

5. The transfer machine with active release function as claimed in claim 1, characterized in that: The transmission device also includes a transmission shaft, which includes an optical axis section and a transmission section. The torque output component is mounted on the optical axis section and can rotate relatively. The torque input component is mounted on the transmission section to keep the two rotating synchronously in the circumferential direction and able to move relatively in the axial direction.

6. The transfer machine with active release function as claimed in claim 5, characterized in that: The transmission section and the torque input component form a non-circular shaft hole fit or a keyway fit.

7. The transfer machine with active release function as claimed in claim 5, characterized in that: A first limiting shoulder and a second limiting shoulder are respectively provided at both ends of the optical axis segment, the torque input component is axially limited by the elastic preload component and the first limiting shoulder, and the torque output component is axially limited by the second limiting shoulder and the torque input component.

8. The transfer machine with active release function as claimed in claim 1, characterized in that: The release component is connected to the torque input component and can drive the torque input component to move axially to release the coupling transmission with the torque output component. The torque input component can rotate relative to the release component.

9. The transfer machine with active release function as claimed in claim 8, characterized in that: The transfer machine comprises a carrier frame, the lifting device and the transmission device are assembled on the carrier frame, the release component is axially movably mounted on the carrier frame, and one end of the release component extending out of the carrier frame is connected to a pull rope.

10. The transfer machine with active release function according to claim 9, characterized in that: The release component includes a pull rod and a cavity provided at one end of the pull rod. A pull rod hole is provided on the support frame. The pull rod passes through the pull rod hole and can move axially. One end of the torque input component can be rotatably extended into the cavity and is axially limited by a limit pin. The release component acts on the limit pin to drive the torque input component to move.

11. The transfer machine with active release function according to claim 10, characterized in that: The release component includes a first sleeve and a second sleeve which are separately arranged, the first sleeve is connected to the pull rod, the second sleeve is docked on the first sleeve to enclose the cavity, and the second sleeve is provided with an assembly hole for the limit pin to pass through.

12. The transfer machine with active release function according to claim 10, characterized in that: The transmission device further comprises a limit bracket, wherein the limit bracket is attached to the bearing frame, and the elastic pre-tightening component is sleeved on the torque input component and is stopped and pre-tightened by the limit bracket.

13. The transfer machine with active release function according to claim 12, characterized in that: The limiting bracket and the limiting pin limit the axial displacement of the pull rod.

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

15. The transfer machine with active release function according to claim 1, characterized in that: The torque output component is one of a gear, a sprocket, a pulley and a friction wheel.

16. The transfer machine with active release function according to claim 1, characterized in that: The lifting device comprises a drum and a rigging wound on the drum, the motor drives the drum to rotate through the transmission device, and the rotating motion of the drum drives the rigging to be lifted and lowered.

17. The transfer machine with active release function according to claim 1, characterized in that: The transfer machine comprises a track mechanism and a main machine, the motor, the lifting device and the transmission device are arranged on the main machine, and the main machine is connected to the track mechanism and can move along the track mechanism.

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