Active release transmission device of shifting machine, lifting driving system and shifting machine

Abstract

The utility model discloses an active release transmission device of a shifting machine, which comprises a torque limiter comprising a driving piece, a transmission piece and an elastic piece; the torque input component comprises an input transmission body and an input connecting body which rotate synchronously, the input transmission body receives power input, and the input connecting body is provided with a first transmission groove; the torque output component comprises an output transmission body and an output connecting body which rotate synchronously, the output transmission body outputs power, and the output connecting body is provided with a second transmission groove; wherein the driving piece is configured to have a power-on state and a power-off state, and when the driving piece is in the power-off state, the transmission piece is kept in joint with the first transmission groove and the second transmission groove at the same time under the acting force of the elastic piece; the driving part drives the transmission part to radially move in a power-on state so as to be separated from the first transmission groove and the second transmission groove, so that the torque output component idles. In addition, the utility model further discloses a lifting driving system of the shifting machine and the shifting machine.

Description

[Technical field]

[0001] The utility model relates to the technical field of transfer machines, in particular to an active release transmission device of a transfer machine, a lifting drive system and a transfer machine. [Background technology]

[0002] The 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-in lifting drive systems, and the lifting drive system is used to realize the lifting of the patient by the transfer machine. The lifting system includes a motor, a transmission device, and a drum with a rigging wound on it. The transmission device includes a torque input component and a torque output component that is transmission-connected to the torque input component. The motor is transmission-connected to the torque input component and inputs power to the torque input component, and the torque output component is transmission-connected to the drum to input power to the drum, so that the drum rotates to realize the winding and release of the rigging, thereby realizing the lifting of the patient. 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 torque input component are damaged due to improper use or other abnormal reasons, the torque output component will be unable to output power normally, that is, 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 an active release transmission device of a transfer machine, a lifting drive system and a transfer machine, which can cut off the torque transmission between the torque input component and the torque output component by energizing the driving component, so that the torque output component can idle relative to the torque input component, thereby actively releasing the rigging, especially 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] Active release drive for lift, comprising:

[0006] A torque limiter comprising a driving member, a transmission member and an elastic member; and,

[0007] a torque input component, comprising an input transmission body and an input connection body that rotate synchronously, the input transmission body receiving power input, the input connection body having a first transmission groove; and

[0008] A torque output component, comprising an output transmission body and an output connecting body that rotate synchronously, the output transmission body outputs power, and the output connecting body has a second transmission groove;

[0009] Wherein, the first transmission groove is engaged with or disengaged from the transmission member in the radial direction of the torque input member, and the second transmission groove is engaged with or disengaged from the transmission member in the radial direction of the torque output member, and the driving member is configured to have a power-on state and a power-off state. In the power-off state of the driving member, the transmission member remains engaged with the first transmission groove and the second transmission groove at the same time under the action of the elastic member; in the power-on state of the driving member, the transmission member is driven to move radially to be separated from the first transmission groove and the second transmission groove, so that the torque output member can idle.

[0010] When the active release transmission device of the utility model works normally, the driving member is in a power-off state. At this time, the transmission member is engaged with the first transmission groove and the second transmission groove under the action of the elastic member. The torque input member can input power to the torque output member through the transmission member to realize the winding and release of the rigging. Once the motor is suddenly powered off due to a circuit problem, or the motor or the transmission mechanism between the motor and the torque input member is damaged due to improper use or other abnormal reasons, the driving member can be controlled to be in a power-on state. At this time, the driving member can drive the transmission member to move radially to separate from the first transmission groove and the second transmission groove, that is, to cut off the power transmission between the torque input member and the torque output member, so that the torque output member can idle relative to the torque input member. At this time, the rigging can be pulled to make it actively released. 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; when the driving member is in a power-off state, the elastic member can drive the transmission member to actively reset so that it re-engages with the first transmission groove and the second transmission groove to achieve the power requirements transmitted by the torque input member and the torque output member.

[0011] In the active release transmission device of the above-mentioned shifting machine, the input connecting body and the output connecting body are coaxially arranged, the first transmission groove is arranged on the outer peripheral side of the input connecting body, the second transmission groove is arranged on the outer peripheral side of the output connecting body, and the first transmission groove and the second transmission groove are axially correspondingly arranged along the rotation axis of the input connecting body, the driving member is installed on the input connecting body or the output connecting body, and the elastic member is arranged on the side of the transmission member away from the first transmission groove and the second transmission groove. Such a design can facilitate the processing and forming of the first transmission groove and the second transmission groove, thereby reducing the processing difficulty of the input connecting body and the output connecting body, and further reducing the processing cost; at the same time, since there is enough space on the side of the transmission member away from the first transmission groove and the second transmission groove, the elastic member is arranged on the side of the transmission member away from the first transmission groove and the second transmission groove, which can facilitate the assembly of the elastic member.

[0012] In the active release transmission device of the above-mentioned lift, the input connector or the output connector is provided with a synchronously rotating support seat, the driving member is fixed on the support seat, and the elastic member is provided between the driving member and the transmission member. With such a design, the elastic member can be compressed between the driving member and the transmission member so as to apply elastic force to the transmission member, without the need to provide other structures to cooperate with the transmission member to compress the elastic member, thereby simplifying the overall structure of the transmission device.

[0013] In the active release transmission device of the above-mentioned shifting machine, the support seat is a support sleeve, and the support sleeve includes a large diameter section and a small diameter section. The first positioning pin radially penetrates the small diameter section and is connected to the input connector or the output connector, and the second positioning pin axially penetrates the large diameter section and is connected to the drive member. With such a design, the small diameter section and the input connector or the output connector can be connected by the first positioning pin to achieve synchronous rotation of the support sleeve and the input connector or the output connector, and the processing is simple and convenient; while the second positioning pin axially penetrates the large diameter section and is connected to the drive member, and the connection between the drive member and the support seat can be achieved to achieve synchronous rotation of the two, and the assembly is simple and convenient.

[0014] In the active release transmission device of the above-mentioned lift, the transmission member has two first side surfaces extending along the rotation axis of the input connector, the first side surfaces are parallel to the moving direction of the transmission member, and the two side walls of the first transmission groove and the two side walls of the second transmission groove are respectively adapted to the two first side surfaces. With such a design, when the driving member is powered on, the transmission member can smoothly move radially outward to timely disengage from the first transmission groove and the second transmission groove, and the processing is also relatively simple and convenient.

[0015] In the active release transmission device of the above-mentioned lift, the transmission member has two first side surfaces extending along the rotation axis of the input connector, the first side surfaces are guide slopes, the distance between the two first side surfaces gradually increases toward the outer side surface of the transmission member, and the two side walls of the first transmission groove and the two side walls of the second transmission groove are respectively adapted to the two first side surfaces. With such a design, when the transmission member is engaged with the first transmission groove and the second transmission groove, the inner side surface of the transmission member can be smoothly inserted into the first transmission groove and the second transmission groove, and guides for subsequent insertion, thereby reducing the difficulty of assembly.

[0016] In the above-mentioned active release transmission device of the lifting machine, when the driving member is powered off, the elastic member applies a preload force to the transmission member so that the transmission member and the first transmission groove, the transmission member and the second transmission groove remain engaged under a predetermined torque, and the torque output member forces the transmission member to move radially out of the first transmission groove and the second transmission groove when subjected to an overload torque, so that the torque output member idles relative to the torque input member to implement overload protection. In this way, under a predetermined torque, the transmission member remains engaged with the first transmission groove and the second transmission groove under the preload force of the elastic member, and the torque input member can transmit the torque to the torque output member through the transmission member to maintain the power transmission between the torque input member and the torque output member; and when the load (patient) is overloaded, the torque output member forces the transmission member to move radially outward when subjected to an overload torque, so that the transmission member is disengaged from the first transmission groove and the second transmission groove, so that the torque transmission between the torque input member and the torque output member can be cut off, so that the torque output member idles relative to the torque input member to implement overload protection, and the idle rotation of the torque output member can quickly release the reverse torque applied by the load , thereby avoiding damage to the torque output component, and because the torque output component cannot transmit the reverse torque of the load to the torque input component, it also avoids the torque input component 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; combined with the first side as a guide slope, slow separation and slow contact can be achieved when the transmission member is clutched, and the clutch is relatively smooth, thereby reducing noise, extending the service life of the product, and providing a better user experience; finally, the torque limiter is used to enable the transmission device to have both active release and overload protection functions, and the structure of the transmission device can be simplified to reduce the manufacturing cost of the transmission device.

[0017] In the active release transmission device of the above-mentioned lift, the outer diameter of the input connection body is smaller than the outer diameter of the input transmission body, the outer diameter of the output connection body is smaller than the outer diameter of the output transmission body, and the outer diameter of the input connection body is equal to the outer diameter of the output connection body. With such a design, the space between the input transmission body and the output transmission body and outside the outer peripheral side of the input connection body can form an installation space for the elastic member, so as to further reduce the radial size of the transmission device; in addition, the transmission member can also be an axially extending arc-shaped piece, so as to simplify the structure of the transmission member.

[0018] In the active release transmission device of the above-mentioned lift, the driving member includes a body, a solenoid and a movable armature, the solenoid is installed on the body, the movable armature is connected to the transmission member and drives the transmission member to move radially, and the elastic member is pressed between the movable armature and the body. With such a design, after the solenoid is energized, the electromagnetic suction force generated by it will drive the movable armature to overcome the force of the elastic member and move radially outward, so that the transmission member is disengaged from the first transmission groove and the second transmission groove, and after the solenoid is powered off, the elastic member can drive the transmission member to automatically reset, and after the transmission member is aligned with the first transmission groove and the second transmission groove, the transmission member is kept engaged with the first transmission groove and the second transmission groove at the same time. It can be seen that the structure of the driving member in this technical solution is relatively simple, thereby reducing the cost of the driving member.

[0019] In the active release transmission device of the above-mentioned lift, the body is provided with a guide hole, the transmission member has a guide column penetrating the movable armature, and the guide column is slidably engaged with the guide hole. With such a design, the radial movement of the transmission member can be guided by the guide hole, so that the transmission member can smoothly engage and disengage with the first transmission groove and the second transmission groove.

[0020] In the active release transmission device of the above-mentioned lift, the transmission member is an arc plate, and the arc plate is provided with a contact plane, and the contact plane abuts against the movable armature. With such a design, the side of the movable armature in contact with the transmission member can be designed as a plane, so that the transmission member is evenly stressed and can move radially smoothly.

[0021] In the active release transmission device of the above-mentioned lift, the elastic member is one of a disc spring, a spiral spring, a rubber spring or a combination thereof. Such a design can facilitate the purchase and assembly of the elastic member and facilitate mass production.

[0022] In the active release transmission device of the above-mentioned lift, the torque input component is one of a gear, a sprocket, a pulley and a friction wheel; the torque output component is one of a gear, a sprocket, a pulley and a friction wheel.

[0023] The lifting drive system of the transfer machine includes a motor and a lifting device, wherein the lifting device includes a drum and a rigging wound on the drum, wherein the rotation of the drum drives the rigging to rise and fall, and the lifting drive system also includes the active release transmission device described in any of the above technical solutions, wherein the motor is transmitted to the torque input component, and the torque output component is transmitted to the drum. With such a design, after adopting the active release transmission device, once the motor is suddenly powered off due to a circuit problem, or the motor or the transmission mechanism between the motor and the torque input component is damaged due to improper use or other abnormal reasons, the drive component can be controlled to be in an energized state, so that the torque output component can idle relative to the torque input component, and at this time, the rigging can be pulled to make it actively released, especially when the patient uses the rigging, the patient can be actively released, ensuring the patient's safety and improving the use experience of the nursing staff and the patient.

[0024] In the lifting drive system of the above-mentioned transfer machine, the lifting drive system further includes a first support frame and a second support frame spaced opposite to each other, the transmission device is assembled between the first support frame and the second support frame, the transmission device further includes a support shaft, the torque input component and the torque output component are rotatably mounted on the support shaft, and the two ends of the support shaft are rotatably connected to the first support frame and the second support frame respectively. With such a design, the support shaft can provide a mounting position for the torque input component and the torque output component, which facilitates the coaxial assembly of the torque input component and the torque output component.

[0025] A transfer machine includes a track mechanism and a host, the host is connected to the track mechanism and can move along the track mechanism, the host is equipped with the lifting drive system, the host includes a controller connected to the drive member, the rigging is equipped with a tension sensor connected to the controller, the tension sensor is used to detect the weight of the load on the rigging, when the detection value of the tension sensor is greater than the weight threshold, the controller controls the drive member to be in a power-on state, when the detection value of the tension sensor is less than the weight threshold, the controller controls the drive member to be in a power-off state. With such a design, when the detection value of the tension sensor is greater than the weight threshold, that is, when the load is overloaded, the power transmission between the torque input component and the torque output component can be disconnected in time to avoid the torque input component and the motor being damaged by the reverse torque of the excessive load, thereby extending the service life of the transfer machine.

[0026] The shifting machine includes a track mechanism and a host, the host is connected to the track mechanism and can move along the track mechanism, the host is equipped with the lifting drive system, the host is provided with a control switch connected to the drive member, and the control switch is used to control the power-on and power-off state of the drive member. With such a design, when it is found that the motor is suddenly powered off due to a circuit problem, or the motor or the transmission mechanism between the motor and the torque input component is damaged due to improper use or other abnormal reasons, the drive member can be powered on by operating the control switch to cut off the power transmission between the torque input component and the torque output component, so that the rigging can be actively released; and when it is necessary to realize power transmission between the torque input component and the torque output component, the control switch can be operated to put the drive member in a power-off state.

[0027] 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

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] Figure 1 This is an exploded schematic diagram of the active release transmission device in the first embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the assembly of the active release transmission device in the first embodiment of the utility model;

[0031] Figure 3 It is an axial cross-sectional view of a driving member in an active release transmission device in Embodiment 1 of the utility model when the driving member is in a power-off state;

[0032] Figure 4 It is a radial cross-sectional view of the active release transmission device in the first embodiment of the utility model;

[0033] Figure 5 It is a radial cross-sectional view of a driving member in an active release transmission device in Embodiment 1 of the utility model when the driving member is in a powered state;

[0034] Figure 6 This is a structural diagram of the lifting drive system in the second embodiment of the present utility model;

[0035] Figure 7 It is a cross-sectional view of the lifting drive system in the second embodiment of the utility model;

[0036] Figure 8 It is a schematic diagram of the structure of the transfer machine in the third embodiment of the present utility model.

[0037] Reference numerals:

[0038] 100, torque input component; 110, input transmission body; 120, input connector; 121, first transmission groove; 200, torque output component; 210, output transmission body; 220, output connector; 221, second transmission groove; 300, torque limiter; 310, driving member; 311, body; 3110, cavity; 3111, guide hole; 312, solenoid; 313, movable armature; 320, transmission member; 321, guide column; 322, contact plane; 323, first side surface; 330, elastic Parts; 400, support shaft; 410, shaft shoulder; 420, retaining spring; 500, support seat; 510, small diameter section; 520, large diameter section; 521, avoidance gap; 530, first positioning pin; 540, second positioning pin; 600, lifting device; 610, roller; 620, rigging; 700, motor; 710, reduction gearbox; 800, first supporting frame; 900, second supporting frame; 1000, rotating shaft; 1100, transmission gear; 1200, track mechanism; 1300, main engine; 1400, tension sensor. [Specific implementation method]

[0039] The utility model provides an active release transmission device for a transfer machine, comprising:

[0040] A torque limiter comprising a driving member, a transmission member and an elastic member; and,

[0041] a torque input component, comprising an input transmission body and an input connection body that rotate synchronously, the input transmission body receiving power input, the input connection body having a first transmission groove; and

[0042] A torque output component, comprising an output transmission body and an output connecting body that rotate synchronously, the output transmission body outputs power, and the output connecting body has a second transmission groove;

[0043] Wherein, the first transmission groove is engaged with or disengaged from the transmission member in the radial direction of the torque input member, and the second transmission groove is engaged with or disengaged from the transmission member in the radial direction of the torque output member, and the driving member is configured to have a power-on state and a power-off state. In the power-off state of the driving member, the transmission member remains engaged with the first transmission groove and the second transmission groove at the same time under the action of the elastic member; in the power-on state of the driving member, the transmission member is driven to move radially to be separated from the first transmission groove and the second transmission groove, so that the torque output member can idle.

[0044] When the active release transmission device of the utility model works normally, the driving member is in a power-off state. At this time, the transmission member is engaged with the first transmission groove and the second transmission groove under the action of the elastic member. The torque input member can input power to the torque output member through the transmission member to realize the winding and release of the rigging. Once the motor is suddenly powered off due to a circuit problem, or the motor or the transmission mechanism between the motor and the torque input member is damaged due to improper use or other abnormal reasons, the driving member can be controlled to be in a power-on state. At this time, the driving member can drive the transmission member to move radially to separate from the first transmission groove and the second transmission groove, that is, to cut off the power transmission between the torque input member and the torque output member, so that the torque output member can idle relative to the torque input member. At this time, the rigging can be pulled to make it actively released. 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; when the driving member is in a power-off state, the elastic member can drive the transmission member to actively reset so that it re-engages with the first transmission groove and the second transmission groove to achieve the power requirements transmitted by the torque input member and the torque output member.

[0045] 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.

[0046] Embodiment 1

[0047] like Figures 1 to 5As shown, the active release transmission device of the lift machine of this embodiment includes a torque input component 100, a torque output component 200 and a torque limiter 300, wherein the torque input component 100 includes an input transmission body 110 and an input connecting body 120, the input transmission body 110 and the input connecting body 120 rotate synchronously, the input transmission body 110 receives power input, and the input connecting body 120 has a first transmission groove 121; and the torque output component 200 includes an output transmission body 210 and an output connecting body 220, the output transmission body 210 and the output connecting body 220 rotate synchronously, the output transmission body 210 outputs power, and the output connecting body 220 has a second transmission groove 221; the torque limiter 300 includes a driving member 31 0, transmission member 320 and elastic member 330, the first transmission groove 121 is engaged with or disengaged from the transmission member 320 in the radial direction of the torque input component 100, the second transmission groove 221 is engaged with or disengaged from the transmission member 320 in the radial direction of the torque output component 200, the driving member 310 is configured to have a power-on state and a power-off state, when the driving member 310 is in the power-off state, the transmission member 320 is simultaneously engaged with the first transmission groove 121 and the second transmission groove 221 under the action of the elastic member 330; when the driving member 310 is in the power-on state, the transmission member 320 is driven to move radially to separate from the first transmission groove 121 and the second transmission groove 221, so that the torque output component 200 is idle relative to the torque input component 100.

[0048] When the active release transmission device in this embodiment works normally, the driving member 310 is in a power-off state. At this time, the transmission member 320 is kept in engagement with the first transmission groove 121 and the second transmission groove 221 under the force of the elastic member 330. The torque input component 100 can input power to the torque output component 200 through the transmission member 320 to achieve the winding and release of the rigging. Once the motor is suddenly powered off due to a circuit problem, or the motor is damaged due to improper use or other abnormal reasons, or the transmission mechanism between the motor and the torque input component 100 is damaged, the driving member 310 can be controlled to be in a power-on state. At this time, the driving member 310 can drive the transmission member 320 to move radially to engage with the first transmission groove 121 and the second transmission groove 221. The movable groove 121 and the second transmission groove 221 are separated, that is, the power transmission between the torque input component 100 and the torque output component 200 is cut off, so that the torque output component 200 can idle relative to the torque input component 100. At this time, the rigging can be pulled to actively release it, 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; when the driving member 310 is in the power-off state, the elastic member 330 can drive the transmission member 320 to actively reset, so that it re-engages with the first transmission groove 121 and the second transmission groove 221 to achieve the power requirements transmitted by the torque input component 100 and the torque output component 200.

[0049] Specifically, the input transmission body 110 and the input connecting body 120 in this embodiment are integrally formed and coaxially arranged, while the output transmission body 210 and the output connecting body 220 are integrally formed and coaxially arranged, and the input connecting body 120 and the output connecting body 220 are coaxially arranged and have the same outer diameter. Preferably, the active release transmission device also includes a support shaft 400, and the input connecting body 120 and the output connecting body 220 are rotatably mounted on the support shaft 400, and the support shaft 400 is provided with an axially spaced shoulder 410 and a groove, and a retaining spring 420 is provided in the groove. The torque input component 100 and the torque output component 200 are abutted against and confined between the shoulder 410 and the retaining spring 420, so that the torque input component 100 and the torque output component 200 are both axially positioned on the support shaft 400. With such a design, the support shaft 400 can provide an installation position for the torque input component 100 and the torque output component 200, which facilitates the coaxial assembly of the torque input component 100 and the torque output component 200.

[0050] The input connector 120 and the output connector 220 are arranged adjacent to each other and have the same outer diameter. The first transmission groove 121 is arranged on the outer peripheral side of the input connector 120. The first transmission groove 121 is an arc groove extending axially from one end of the input connector 120 away from the input transmission body 110 toward the input transmission body 110. The second transmission groove 221 is arranged on the outer peripheral side of the output connector 220. The second transmission groove 221 is an arc groove extending axially from one end of the output connector 220 away from the output transmission body 210 toward the output transmission body 210. The first transmission groove 121 and the second transmission groove 221 have the same curvature, and the first transmission groove 121 and the second transmission groove 221 correspond axially along the rotation axis of the input connector 120. The transmission member 320 is configured to be an arc-shaped plate extending along the rotation axis of the input connector 120 and coaxial with the input connector 120, the curvature of the arc-shaped plate is equal to the curvature of the first transmission groove 121 and the second transmission groove 221, the elastic member 330 is located on the side of the transmission member 320 away from the first transmission groove 121 and the second transmission groove 221, and when the driving member 310 is powered off, the transmission member 320 moves radially inward under the action of the elastic member 330 to maintain engagement with the first transmission groove 121 and the second transmission groove 221 at the same time, that is, the two ends of the transmission member 320 are respectively located in the first transmission groove 121 and the second transmission groove 221 to realize power transmission between the input connector 120 and the output connector 220. In the present embodiment, the design of the first transmission groove 121 and the second transmission groove 221 can facilitate the processing and forming of the first transmission groove 121 and the second transmission groove 221, thereby reducing the processing difficulty of the input connector 120 and the output connector 220, and further reducing the processing cost; at the same time, since there is enough space on the side of the transmission member 320 away from the first transmission groove 121 and the second transmission groove 221, the elastic member 330 is arranged on the side of the transmission member 320 away from the first transmission groove 121 and the second transmission groove 221, which can facilitate the assembly of the elastic member 330.

[0051] Preferably, in this embodiment, the outer diameter of the input connecting body 120 is smaller than the outer diameter of the input transmission body 110, and the outer diameter of the output connecting body 220 is smaller than the outer diameter of the output transmission body 210. Since the outer diameter of the input connecting body 120 is equal to the outer diameter of the output connecting body 220, the space between the input transmission body 110 and the output transmission body 210 and outside the outer peripheral side of the input connecting body 120 can form an installation space for the elastic member 330 to further reduce the radial dimension of the transmission device.

[0052] It is understandable that in other embodiments of the present invention, the outer diameters of the input connector and the output connector may not be equal. In this case, the transmission member may be made into an arc-shaped bending piece to match the first transmission groove and the second transmission groove.

[0053] The elastic member 330 in this embodiment is preferably a spring, such as a coil spring. The output connector 220 is connected to a synchronously rotating support seat 500. The driving member 310 is fixed on the support seat 500. The elastic member 330 is arranged between the driving member 310 and the transmission member 320. Such a design allows the elastic member 330 to be compressed between the driving member 310 and the transmission member 320 so that it applies an elastic force to the transmission member 320. There is no need to additionally set up other structures to cooperate with the transmission member 320 to compress the elastic member 330, thereby simplifying the overall structure of the transmission device.

[0054] It is understandable that in other embodiments of the utility model, the elastic member is not limited to the coil spring. According to actual needs, one of the butterfly spring and the rubber spring 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 prone to 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.

[0055] The support seat 500 in this embodiment is a support sleeve that is sleeved on the outside of the output connector 220. The support sleeve includes a small diameter section 510 and a large diameter section 520. The small diameter section 510 is adapted to the output connector 220. The first positioning pin 530 radially penetrates the small diameter section 510 and is connected to the output connector 220. With this design, the small diameter section 510 and the output connector 220 can be connected by the first positioning pin 530 to achieve synchronous rotation of the support sleeve and the output connector 220, and the processing is simple and convenient; and the second positioning pin 540 axially penetrates the large diameter section 520 and is connected to the drive member 310, which can realize the connection between the drive member 310 and the support seat 500 to achieve synchronous rotation of the two, and the assembly is simple and convenient.

[0056] It is understandable that in other embodiments of the present invention, the small diameter section is provided with a non-circular hole, such as a D-shaped hole, a square hole, a hexagonal hole, etc., and the output connector has a non-circular section adapted to the non-circular hole, so that the support seat and the output connector can also rotate synchronously.

[0057] The driving member 310 in this embodiment includes a body 311, a solenoid 312 and a movable armature 313. The body 311 is a cylindrical structure. The large diameter section 520 is provided with an avoidance notch 521 formed by cutting away from one end of the large diameter section 520 away from the small diameter section 510 axially toward the small diameter section 510. The avoidance notch 521 is adapted to the outer peripheral side of at least part of the body 311. The second positioning pin 540 axially penetrates the large diameter section 520 and is connected to the body 311. The main body 311 has a cavity 3110 open toward the inner side of the large diameter section 520, the solenoid 312 is installed in the cavity 3110, the movable armature 313 is fixedly connected to the transmission member 320 to drive the transmission member 320 to move radially, and the main body 311 is also provided with a groove located on the outer side of the cavity 3110, one end of the elastic member 330 is inserted into the groove, and the other end is connected to the movable armature 313, so that the elastic member 330 is pressed between the movable armature 313 and the main body 311. With such a design, after the solenoid 312 is energized, the electromagnetic attraction it generates will drive the movable armature 313 to overcome the force of the elastic member 330 and move radially outward, so that the transmission member 320 disengages from the first transmission groove 121 and the second transmission groove 221. After the solenoid 312 is de-energized, the elastic member 330 can drive the transmission member 320 to automatically reset. After the transmission member 320 is aligned with the first transmission groove 121 and the second transmission groove 221, the transmission member 320 is reset to maintain engagement with the first transmission groove 121 and the second transmission groove 221 at the same time. It can be seen that the structure of the driving member 310 in this embodiment is relatively simple, thereby reducing the cost of the driving member 310.

[0058] Preferably, the movable armature 313 is a circular plate, and a plurality of elastic members 330 are evenly spaced and distributed circumferentially with the center of the movable armature 313 as the center of the circle, so that the movable armature 313 is evenly stressed, thereby driving the transmission member 320 to move radially smoothly.

[0059] In addition, a column is protruded from the center of the cavity 3110 of the body 311 in this embodiment, a guide hole 3111 is provided on the column, a guide column 321 is provided at the center of the transmission member 320, a through hole is provided on the movable armature 313, the guide column 321 penetrates the through hole and has an interference fit with the through hole, and the guide column 321 is slidably fitted with the guide hole 3111. With such a design, the radial movement of the transmission member 320 can be guided by the guide hole 3111, so that the transmission member 320 can smoothly engage and disengage with the first transmission groove 121 and the second transmission groove 221.

[0060] Preferably, the transmission member 320 is provided with a contact plane 322, and the contact plane 322 abuts against the movable armature 313. With such a design, the side of the movable armature 313 in contact with the transmission member 320 can be designed as a plane, so that the transmission member 320 is evenly stressed, and the transmission member 320 can move radially smoothly.

[0061] It can be understood that in other embodiments of the present invention, the transmission part is a magnetic part, such as a ferroalloy product or an iron product, the transmission part has a guide column that slides with the guide hole, and the elastic part is pressed between the transmission part and the driving part. Such a design can eliminate the movable armature and the assembly of the movable armature and the transmission part, thereby simplifying the structure of the torque limiter.

[0062] In order to enable the transmission member 320 to be smoothly inserted into the first transmission groove 121 and the second transmission groove 221 when resetting, the transmission member 320 in this embodiment has two first side surfaces 323 extending along the rotation axis of the input connector 120, and the first side surfaces 323 are guide slopes. The distance between the two first side surfaces 323 gradually increases toward the outer side surface of the transmission member 320, and the two side walls of the first transmission groove 121 are adapted to the two first side surfaces 323, that is, the circumferential distance between the two side walls of the first transmission groove 121 gradually increases radially outward, and the two side walls of the second transmission groove 221 are respectively adapted to the two first side surfaces 323, that is, the circumferential distance between the two side walls of the second transmission groove 221 gradually increases radially outward. With such a design, when the transmission member 320 is engaged with the first transmission groove 121 and the second transmission groove 221, the inner side surface of the transmission member 320 can be smoothly inserted into the first transmission groove 121 and the second transmission groove 221, and guide the subsequent insertion, thereby reducing the difficulty of assembly; in addition, when the driving member 310 is in the energized state, the driving member 310 can also drive the transmission member 320 to smoothly disengage from the first transmission groove 121 and the second transmission groove 221.

[0063] In addition, when the driving member 310 is in the power-off state, the elastic member 330 applies a pre-tightening force to the transmission member 320 so that the transmission member 320 and the first transmission groove 121, and the transmission member 320 and the second transmission groove 221 remain engaged under a predetermined torque. By setting the first side surface 323, the torque output component 200 can generate a radial component force that forces the transmission member 320 to move radially outward when subjected to an overload torque, so that the transmission member 320 disengages from the first transmission groove 121 and the second transmission groove 221, that is, the torque output component 200 is caused to idle relative to the torque input component 100 to implement overload protection. With such a design, under a predetermined torque, the transmission member 320 maintains engagement with the first transmission groove 121 and the second transmission groove 221 under the preload force of the elastic member 330, and at this time, the torque input component 100 can transmit the torque to the torque output component 200 through the transmission member 320 to maintain the power transmission between the torque input component 100 and the torque output component 200; and when the load (patient) is overloaded, the torque output component 200 forces the transmission member 320 to move radially outward when subjected to the overload torque, so that the transmission member 320 disengages from the first transmission groove 121 and the second transmission groove 221 (such as Figure 5As shown), the torque transmission between the torque input component 100 and the torque output component 200 can be cut off, so that the torque output component 200 is idling relative to the torque input component 100 to implement overload protection. The idling of the torque output component 200 can quickly release the reverse torque applied by the load, thereby avoiding damage to the torque output component 200. Since the torque output component 200 cannot transmit the reverse torque of the load to the torque input component 100, it is also avoided that the torque input component 100 is subjected to the reverse torque of the excessive load and is damaged, thereby avoiding damage to the transmission device and extending the service life of the transmission device; combined with the first side surface 323 as a guiding slope, slow separation and slow contact can be achieved when the transmission member 320 is clutched, and the clutch is relatively smooth, thereby reducing noise, extending the service life of the product, and providing a better user experience; finally, the torque limiter 300 enables the transmission device to have both active release and overload protection functions, and can also simplify the structure of the transmission device to reduce the manufacturing cost of the transmission device.

[0064] In the case of overload, although the rotation of the torque output component 200 will cause the transmission member 320 to engage with the first transmission groove 121 and the second transmission groove 221 again, the reverse torque of the load will still force the transmission member 320 to overcome the force of the elastic member 330 and disengage from the first transmission groove 121 and the second transmission groove 221 to disconnect the torque transmission, that is, during the entire idling process of the torque output component 200, although there will be continuous clutching, the reverse torque of the load will not be transmitted to the torque input component 100, thereby achieving overload protection.

[0065] It should be noted that, since the transmission device in this embodiment is mainly used for a shifting machine, the predetermined torque mentioned means that when the shifting machine is in normal working condition, the torque input component 100 and the torque output component 200 are simultaneously engaged with the first transmission groove 121 and the second transmission groove 221 through the transmission member 320 to realize the transmission torque. When the torque input component 100 outputs the working torque to the torque output component 200 through the transmission member 320, they are also subjected to the reverse torque from the load. In this embodiment, considering that the load exceeding the bearing limit of the shifting machine is likely to cause damage to the shifting machine, it is necessary to set a threshold value for the working torque that can keep the transmission member 320 engaged with the first transmission groove 121 and the second transmission groove 221 at the same time to realize the transmission of the torque input component 100 and the torque output component 200. The shifting machine works normally ( When the load is not overloaded), the reverse torque of the load will not exceed the threshold value. The transmission member 320, under the force of the elastic member 330, is simultaneously engaged with the first transmission groove 121 and the second transmission groove 221 to achieve the transmission of the working torque, thereby completing the transmission of the power. Once an overload occurs, the reverse torque of the load exceeds the threshold value, which will drive the transmission member to overcome the force of the elastic member 330 and disengage from the first transmission groove 121 and the second transmission groove 221 to disconnect the transmission of the torque and thereby achieve overload protection. At this time, the torque output member 200 is idle and cannot transmit the reverse torque of the load to the torque input member 100, thereby preventing the motor and the torque input member 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 elastic member 330 to the transmission member 320. In this embodiment, the preload force can be adjusted by replacing the elastic member 330 with different elastic moduli, thereby achieving the adjustment of the predetermined torque, and the matching of the axial parts is not affected.

[0066] The torque input component 100 in this embodiment is one of a gear, a sprocket, a pulley and a friction wheel, that is, the input transmission body 110 is one of a gear transmission body, a sprocket transmission body, a pulley transmission body and a friction wheel transmission body, and the torque output component 200 is one of a gear, a sprocket, a pulley and a friction wheel, that is, the output transmission body 210 is one of a gear transmission body, a sprocket transmission body, a pulley transmission body and a friction wheel transmission body.

[0067] It can be understood that in other embodiments of the present invention, the support seat can also be a bracket, which includes a radial section extending radially along the output connector and an axial section formed by bending the two ends of the radial section in opposite directions, and the axial section extends along the axis of the output connector, one of the axial sections is fixedly connected to the output connector by screws, and the other axial section is fixedly installed with the driving member.

[0068] It is understandable that in other embodiments of the present invention, the support seat can also be fixed on the input connector and rotate synchronously with the input connector. The specific implementation method can refer to the way the support seat is installed on the output connector, which will not be described in detail here.

[0069] It can be understood that in other embodiments of the present invention, the first side surface can also be parallel to the moving direction of the transmission member, and the two side walls of the first transmission groove and the two side walls of the second transmission groove are respectively adapted to the two first side surfaces. With such a design, when the driving member is in the energized state, the transmission member can move radially outward smoothly and disengage from the first transmission groove and the second transmission groove in time, and the processing is also relatively simple and convenient.

[0070] Embodiment 2

[0071] like Figure 6 and Figure 7 As shown, this embodiment also discloses a lifting drive system of a transfer machine, including a lifting device 600 and a motor 700. The lifting device 600 includes a drum 610 and a rigging 620 wound on the drum 610. The rotational movement of the drum 610 drives the rigging 620 to rise and fall. The lifting drive system also includes the active release transmission device described in Example 1. The motor 700 is transmitted to the torque input component 100, and the torque output component 200 is transmitted to the drum 610. The load on the transfer machine will generate a reverse torque on the torque output component 200 through the drum 610. With such a design, after adopting the active release transmission device, once the motor 700 is suddenly powered off due to a circuit problem, or the motor 700, or the transmission mechanism between the motor 700 and the torque input component 100 is damaged due to improper use or other abnormal reasons, the drive member 310 can be controlled to be in an energized state, so that the torque output component 200 can idle relative to the torque input component 100. At this time, the rigging 620 can be pulled to actively release it, especially when the patient uses the rigging, the patient can be actively released to ensure the patient's safety and improve the use experience of nursing staff and patients; in addition, overload protection can be implemented when the transferred patient is overweight or overloaded to avoid damage to the motor 700, thereby extending the service life of the lifting drive system.

[0072] The lifting drive system further includes a first support frame 800 and a second support frame 900 which are spaced apart from each other. The transmission device is installed between the first support frame 800 and the second support frame 900, that is, the two ends of the support shaft 400 are rotatably connected to the first support frame 800 and the second support frame 900 through bearings, respectively. There are two motors 700, which are respectively located on the outside of the first support frame 800 and the second support frame 900. The transmission mechanism arranged between the motor 700 and the torque input component 100 includes a reduction box 710, a rotating shaft 1000 and a transmission gear 1100 which rotates synchronously with the rotating shaft 1000. The output end of each motor 700 is connected to a reduction gear. The first support frame 800 and the second support frame 900 are rotatably mounted on the first support frame 800 and the second support frame 900 through bearings, and the two ends of the rotating shaft 1000 are respectively connected to the two reduction boxes 710, and the input transmission body 110 and the output transmission body 210 are gears. The transmission gear 1100 is meshed and connected with the input transmission body 110, and the output transmission body 210 is meshed with the gear ring on the drum 610, so that the motor 700 transmits the torque to the torque input component 100 through the reduction box 710, the rotating shaft 1000 and the transmission gear 1100, and the torque output component 200 transmits the torque to the drum 610 through the gear ring on the output transmission body 210 and the drum 610. When in use, one of the motors 700 can drive the rotating shaft 1000 to rotate, or the two motors 700 can drive the rotating shaft 1000 to rotate at the same time.

[0073] It can be understood that in other embodiments of the present invention, the number of the motor and the reduction gearbox can also be one, and the motor is connected to the rotating shaft through the reduction gearbox to drive the rotating shaft to rotate.

[0074] Embodiment 3

[0075] like Figure 8 As shown, this embodiment also discloses a transfer machine, including a track mechanism 1200 and a host 1300, wherein the host 1300 is connected to the track mechanism 1200 and can move along the track mechanism 1200, and the host 1300 is configured with the lifting drive system described in Example 2, and the track mechanism 1200 adopts a conventional guide rail and is installed on the ceiling, and the host 1300 can move along the guide rail; wherein the patient who needs to be moved and lifted acts on the rigging 620 of the lifting drive system, thereby realizing the lifting and lowering of the patient on the rigging 620, and the host 1300 can move along the track mechanism 1200, that is, the host 1300 can slide on the ceiling, so as to realize the transfer of the patient on the rigging 620.

[0076] The host 1300 in this embodiment further includes a controller, which is connected to the driving member 310, and the rigging 620 is provided with a tension sensor 1400, which is connected to a hook provided with a load, and the tension sensor 1400 is connected to the controller, and the tension sensor 1400 is used to detect the weight of the load on the rigging 620. When the detection value of the tension sensor 1400 is greater than the set weight threshold, that is, when the load is overloaded, the controller controls the driving member 310 to be in a powered state, so as to disconnect the torque input component 100 and the torque output component 100 in time. The controller controls the driving member 310 to be in a power-off state when the detection value of the tension sensor 1400 is less than the set weight threshold, so that the transmission member 320 is reset under the action of the elastic member 330 and remains engaged with the first transmission groove 121 and the second transmission groove 221, so as to realize the power transmission between the torque input member 100 and the torque output member 200.

[0077] Embodiment 4

[0078] Different from the third embodiment, this embodiment also discloses a transfer machine, including a track mechanism and a host, the host is connected to the track mechanism and can move along the track mechanism, the host is equipped with the lifting drive system described in the second embodiment, the track mechanism adopts a conventional guide rail and is installed on the ceiling, and the host can move along the guide rail; wherein the patient who needs to be moved and lifted acts on the rigging of the lifting drive system, so as to realize the lifting and lowering of the patient on the rigging, and the host can move along the track mechanism, that is, the host can slide on the ceiling, so as to realize the transfer of the patient on the rigging, and the host is provided with a control switch connected to the driving member, and the control switch is used to control the power-on and power-off state of the driving member. With such a design, when it is found that the motor is suddenly powered off due to a circuit problem, or the motor or the transmission mechanism between the motor and the torque input component is damaged due to improper use or other abnormal reasons, the driving member can be powered on by operating the control switch to cut off the power transmission between the torque input component and the torque output component, so that the rigging can be actively released; and when it is necessary to realize power transmission between the torque input component and the torque output component, the control switch can be operated to put the driving member in a power-off state.

[0079] 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. An active release transmission device for a lift, characterized in that: include: A torque limiter, comprising a driving member, a transmission member and an elastic member; as well as, A torque input component, comprising a synchronously rotating input transmission body and an input connecting body, wherein the input transmission body receives power input and the input connecting body has a first transmission groove; as well as A torque output component, comprising an output transmission body and an output connecting body that rotate synchronously, the output transmission body outputs power, and the output connecting body has a second transmission groove; Wherein, the first transmission groove is engaged with or disengaged from the transmission member in the radial direction of the torque input member, and the second transmission groove is engaged with or disengaged from the transmission member in the radial direction of the torque output member, and the driving member is configured to have a power-on state and a power-off state. In the power-off state of the driving member, the transmission member remains engaged with the first transmission groove and the second transmission groove at the same time under the action of the elastic member; in the power-on state of the driving member, the transmission member is driven to move radially to be separated from the first transmission groove and the second transmission groove, so that the torque output member can idle.

2. The active release transmission device of the transfer machine according to claim 1, characterized in that: The input connector and the output connector are coaxially arranged, the first transmission groove is arranged on the outer peripheral side of the input connector, the second transmission groove is arranged on the outer peripheral side of the output connector, and the first transmission groove and the second transmission groove are axially correspondingly arranged along the rotation axis of the input connector, the driving member is installed on the input connector or the output connector, and the elastic member is arranged on the side of the transmission member away from the first transmission groove and the second transmission groove.

3. The active release transmission device of the transfer machine as claimed in claim 2, characterized in that: The input connector or the output connector is sleeved with a synchronously rotating support seat, the driving member is fixed on the support seat, and the elastic member is arranged between the driving member and the transmission member.

4. The active release transmission device of the transfer machine according to claim 3, characterized in that: The support seat is a support sleeve, which includes a large diameter section and a small diameter section. The first positioning pin radially penetrates the small diameter section and is connected to the input connector or the output connector. The second positioning pin axially penetrates the large diameter section and is connected to the drive member.

5. The active release transmission device of the transfer machine as claimed in claim 2, characterized in that: The transmission member has two first side surfaces extending along the rotation axis of the input connector, the first side surfaces are parallel to the moving direction of the transmission member, and the two side walls of the first transmission groove and the two side walls of the second transmission groove are respectively adapted to the two first side surfaces.

6. The active release transmission device of the transfer machine as claimed in claim 2, characterized in that: The transmission member has two first side surfaces extending along the rotation axis of the input connector, the first side surfaces are guide slopes, the distance between the two first side surfaces gradually increases toward the outer side surface of the transmission member, and the two side walls of the first transmission groove and the two side walls of the second transmission groove are respectively adapted to the two first side surfaces.

7. The active release transmission device of the transfer machine according to claim 6, characterized in that: When the driving member is in a power-off state, the elastic member applies a pre-tightening force to the transmission member so that the transmission member and the first transmission groove, and the transmission member and the second transmission groove remain engaged under a predetermined torque, and when the torque output member is subjected to an overload torque, the torque output member forces the transmission member to move radially out of the first transmission groove and the second transmission groove, so that the torque output member idles relative to the torque input member to implement overload protection.

8. The active release transmission device of the transfer machine as claimed in claim 2, characterized in that: The outer diameter of the input connecting body is smaller than the outer diameter of the input transmission body, the outer diameter of the output connecting body is smaller than the outer diameter of the output transmission body, and the outer diameter of the input connecting body is equal to the outer diameter of the output connecting body.

9. The active release transmission device of the transfer machine according to claim 1, characterized in that: The driving member comprises a body, a solenoid and a movable armature, wherein the solenoid is mounted on the body, the movable armature is connected with the transmission member and drives the transmission member to move radially, and the elastic member is pressed between the movable armature and the body.

10. The active release transmission device of the transfer machine according to claim 9, characterized in that: The body is provided with a guide hole, the transmission member has a guide column penetrating the movable armature, and the guide column is slidably matched with the guide hole.

11. The active release transmission device of the transfer machine according to claim 9, characterized in that: The transmission member is an arc-shaped plate, and the arc-shaped plate is provided with a contact plane, and the contact plane abuts against the movable armature.

12. The active release transmission device of the transfer machine according to claim 1, characterized in that: The elastic member is one of a disc spring, a coil spring, and a rubber spring, or a combination thereof.

13. The active release transmission device of the transfer machine according to claim 1, characterized in that: The torque input component is one of a gear, a sprocket, a pulley and a friction wheel; the torque output component is one of a gear, a sprocket, a pulley and a friction wheel.

14. A lifting drive system for a transfer machine, comprising a motor and a lifting device, wherein the lifting device comprises a drum and a rigging wound on the drum, wherein the rotation of the drum drives the rigging to rise and fall, and wherein: The lifting drive system further comprises an active release transmission device as claimed in any one of claims 1 to 13, wherein the motor is driven by the torque input component, and the torque output component is driven by the drum.

15. The lifting drive system of the transfer machine according to claim 14, characterized in that: The lifting drive system also includes a first support frame and a second support frame that are spaced apart from each other, the transmission device is assembled between the first support frame and the second support frame, the transmission device also includes a support shaft, the torque input component and the torque output component are rotatably mounted on the support shaft, and both ends of the support shaft are rotatably connected to the first support frame and the second support frame respectively.

16. A transfer machine, comprising a track mechanism and a host, wherein the host is connected to the track mechanism and can move along the track mechanism, characterized in that: The main machine is equipped with the lifting drive system according to claim 14, the main machine includes a controller connected to the drive member, a tension sensor connected to the controller is installed on the rigging, the tension sensor is used to detect the weight of the load on the rigging, when the detection value of the tension sensor is greater than the weight threshold, the controller controls the drive member to be in a power-on state, when the detection value of the tension sensor is less than the weight threshold, the controller controls the drive member to be in a power-off state.

17. A transfer machine, comprising a track mechanism and a host, wherein the host is connected to the track mechanism and can move along the track mechanism, characterized in that: The host is equipped with the lifting drive system according to claim 14, and a control switch connected to the drive member is provided on the host, and the control switch is used to control the power on and off state of the drive member.

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