Overload protection transmission device of shifting machine, lifting driving system and shifting machine

Abstract

The utility model discloses an overload protection transmission device of a shifting machine, a lifting driving system and the shifting machine, relates to the technical field of medical care equipment, solves the problem that the safety performance of the shifting machine is low, and provides the overload protection transmission device of the shifting machine. Comprising a supporting shaft, a torque input component, a torque output component, a coupling unit and an elastic pre-tightening component. At least one of the torque input component and the torque output component can axially move relative to the supporting shaft, and the elastic pre-tightening component applies pre-tightening force, so that the torque input component and the torque output component are axially coupled under preset torque. When the torque output component is subjected to overload torque, the coupling unit is forced to release coupling transmission between the torque input component and the torque output component so as to implement overload protection. According to the overload protection transmission device of the shifting machine, overload protection can be achieved, and the use safety 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 an overload protection transmission device of a transfer machine, a lifting drive system and a transfer machine. 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 equipped with a lifting drive system, and the lifting and lowering of the patient by the transfer machine is achieved through the lifting drive system. However, when the patient is placed on the transfer machine, the patient will generate a certain load on the transfer machine. When the load is too large, the reverse torque generated by the load on the transfer machine will cause wear or damage to the internal transmission structure of the lifting drive system, thereby reducing the service life of the transfer machine and increasing the risk of safety accidents caused by damage to the transfer machine, making the safety performance of the transfer machine low. 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 an overload protection transmission device for a transfer machine 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] The overload protection transmission device of the transfer machine is characterized by comprising:

[0006] a support shaft; and,

[0007] a torque input component rotatably mounted on the support shaft to receive power input, and,

[0008] a torque output component rotatably mounted on the support shaft for outputting power, and,

[0009] A coupling unit, used to establish an axial coupling transmission between the torque input component and the torque output component;

[0010] An elastic pre-tightening component disposed on the support shaft;

[0011] Among them, at least one of the torque input component and the torque output component can move axially relative to the support shaft, and the elastic pre-tightening component applies a pre-tightening 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 under a predetermined torque, and 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.

[0012] In the above-mentioned overload protection transmission device of the transfer machine, 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 spherical coupling body is forced to disengage from the first coupling groove or the second coupling groove to release the coupling transmission between the torque input component and the torque output component.

[0013] In the above-mentioned overload protection transmission device of the transfer machine, 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. When the torque output component is subjected to overload torque, the first concave-convex structure and the second concave-convex structure are forced to separate to release the coupling transmission between the torque input component and the torque output component.

[0014] In the above-mentioned overload protection transmission device of the lift, an axial stop is provided on the support shaft, and the elastic preload component is sleeved on the support shaft and preloaded between the axial stop and the axially movable torque input component or torque output component.

[0015] In the above-mentioned overload protection transmission device of the transfer machine, the axial stop includes a compression gasket and a fastener, the compression gasket abuts against the elastic preload component, and the fastener is threadedly connected to the support shaft for adjusting the preload force of the elastic preload component.

[0016] In the above-mentioned overload protection transmission device of the transfer machine, the elastic preload component is one of a disc spring, a coil spring, a rubber spring or a combination thereof.

[0017] In the above-mentioned overload protection transmission device of the transfer machine, the overload protection transmission device further comprises an elastic buffer component, which provides buffering for the torque input component or the torque output component when the coupling unit releases the coupling transmission between the torque input component and the torque output component.

[0018] In the above-mentioned overload protection transmission device of the lift, the torque input component and the torque output component are both axially movable relative to the support shaft, and the torque input component and the torque output component are pre-tightened between the elastic buffer component and the elastic pre-tightening component.

[0019] In the above-mentioned overload protection transmission device of the transfer machine, the elastic buffer component is built into the torque input component or the torque output component, and acts on the coupling unit to provide buffering when the coupling unit releases the coupling transmission between the torque input component and the torque output component.

[0020] In the above-mentioned overload protection transmission device of the transfer machine, the elastic buffer component is one of a disc spring, a coil spring, and a rubber spring, or a combination thereof.

[0021] In the above-mentioned overload protection transmission device of the 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.

[0022] The utility model also proposes a lifting drive system for a shifting machine, comprising a motor and a lifting device, wherein the lifting device comprises a drum and a rigging wound on the drum, wherein the rotational movement of the drum drives the rigging to be lifted and lowered, and the lifting drive system further comprises the overload protection 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.

[0023] In the lifting drive system of the above-mentioned transfer machine, the lifting drive system also includes a first support frame and a second support frame that are spaced apart from each other, the overload protection transmission device is assembled between the first support frame and the second support frame, and both ends of the support shaft are rotatably connected to the first support frame and the second support frame respectively.

[0024] In the lifting drive system of the above-mentioned transfer machine, the lifting drive system is configured with two motors, and the two motors are respectively located on the outside of the first support frame and the second support frame. A transmission shaft for transmitting to the torque input component is arranged between the first support frame and the second support frame, and the transmission shaft can be selectively driven to rotate by one motor or two motors.

[0025] The utility model also provides 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, and the host is equipped with the lifting drive system described in any of the above technical solutions.

[0026] Beneficial effects of the utility model:

[0027] The overload protection transmission device of the shifting machine proposed in the utility model comprises a support shaft, a torque input component rotatably mounted on the support shaft to receive power input, a torque output component rotatably mounted on the support shaft to output power, a coupling unit for establishing axial coupling transmission between the torque input component and the torque output component, and an elastic pre-tightening component arranged on the support shaft; wherein at least one of the torque input component and the torque output component is axially movable relative to the support shaft, and the elastic pre-tightening component applies a pre-tightening 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 under a predetermined torque, and 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.

[0028] When the device is in use, under the normal working state of the lift, the torque input component and the torque output component are coupled and transmit torque through the coupling unit, and the torque input component outputs the working torque to the torque output component through the coupling unit. At the same time, the load on the lift will generate a reverse torque on the torque input component and the torque output component; the elastic preload component applies a preload force to the axially movable torque input component or the torque output component to set a threshold value for the working torque that can maintain the coupled transmission of the torque input component and the torque output component. This threshold value is the "predetermined torque" mentioned in the utility model. When the load is small and the lift is working normally, the reverse torque of the load will not exceed the threshold value, and the coupling unit maintains the coupling state and transmits the working torque; once the load is too large, that is, overload, the reverse torque of the load The torque will exceed the threshold value, and the axially movable torque input component or torque output component will move axially relative to the support shaft, so that the elastic preload component is elastically deformed under force and maintains a tendency to reset, thereby forcing the coupling unit to release the coupling transmission, so that the torque output component idles and does not transmit the reverse torque of the load to the torque input component, thereby avoiding the torque input component, the power component for providing power, and the transmission chain between the torque input component and the power component from being worn or damaged due to excessive load reverse torque, thereby realizing overload protection of the transfer machine, preventing the internal transmission structure of the transfer machine from being worn or damaged due to excessive load, thereby increasing the service life of the transfer machine, reducing the risk of safety accidents caused by damage to the transfer machine, and thus improving the safety performance of the transfer machine.

[0029] Furthermore, an axial stop is provided on the support shaft, and the elastic preload component is sleeved on the support shaft and preloaded between the axial stop and the axially movable torque input component or torque output component. The axial stop enables the elastic preload component to be directly sleeved on the support shaft without having one end of the elastic preload component fixedly mounted on the support shaft, thereby facilitating the installation and replacement of the elastic preload component.

[0030] Furthermore, the axial stop includes a compression gasket and a fastener, the compression gasket abuts the elastic preload component, and the fastener is threadedly connected to the support shaft for adjusting the preload force of the elastic preload component. The elastic deformation of the elastic preload component can be adjusted by rotating the fastener, so that the preload force applied by the elastic preload component is adjustable, so that the elastic preload component can be adapted to different predetermined torque requirements by setting different preload forces, so that the device can be adapted to different use requirements, thereby improving the practicality of the device, and the adjustment method is simple and convenient, thereby improving the convenience of using the device; at the same time, a compression gasket is installed between the elastic preload component and the fastener, and the compression gasket can evenly distribute the force applied by the elastic preload component to the fastener, thereby reducing wear and stress concentration on the fastener and extending the service life of the fastener.

[0031] Furthermore, the overload protection transmission device further includes an elastic buffer component, which provides buffering for the torque input component or the torque output component when the coupling unit releases the coupling transmission between the torque input component and the torque output component. The elastic buffer component and the elastic preload component are respectively located on both sides of the coupling unit. When the coupling unit releases the coupling transmission, the coupling unit will generate a thrust, i.e., an impact force, along the axial direction of the support shaft on the torque input component and the torque output component, wherein the elastic preload component and the elastic buffer component will both be elastically deformed by force to absorb and buffer the impact and vibration generated by the coupling unit on the torque input component and the torque output component respectively; at the same time, when the torque input component and the torque output component are coupled again, the axially movable torque input component or the torque output component will generate an impact force on the other component, and in this process, the elastic buffer component can be elastically deformed to buffer it, so as to reduce the impact on the other component, reduce the noise and impact energy generated during the use of the device on each component, extend the service life of each component, and improve the comfort and stability of the device.

[0032] Furthermore, the torque input component and the torque output component can both move axially relative to the support shaft, and the torque input component and the torque output component are pre-tightened between the elastic buffer component and the elastic pre-tightening component. The elastic force applied by the elastic buffer component is less than the pre-tightening force applied by the elastic pre-tightening component. The elastic force applied by the elastic buffer component can be adjusted by adjusting the specifications of the elastic buffer component, so that the impact energy can be balanced by adjusting the specifications of the elastic buffer component and the spring pre-tightening component, so that the device can be adapted to different use requirements. At the same time, the elastic buffer component is external to the torque input component and the torque output component, which makes it easier to replace the elastic buffer component and adjust the specifications, and will not affect the strength of the torque input component and the torque output component, thereby ensuring the stability of the device.

[0033] Furthermore, the elastic buffer component is built into the torque input component or the torque output component, and acts on the coupling unit to provide buffering when the coupling unit releases the coupling transmission between the torque input component and the torque output component. The elastic buffer component is built into the torque input component or the torque output component, thereby reducing the installation space required for the entire device, while reducing the influence of external factors on the elastic buffer component, and improving the stability of the device.

[0034] The lifting drive system of the transfer machine proposed by the utility model includes a motor and a lifting device, the lifting device includes a drum and a rigging wound on the drum, and the rotational movement of the drum drives the rigging to rise and fall. Since the lifting drive system also includes the overload protection transmission device of any of the above-mentioned technical solutions, the motor is transmitted to the torque input component, and the torque output component is transmitted to the drum, the lifting drive system of the transfer machine has all the technical effects of the overload protection transmission device of the above-mentioned transfer machine.

[0035] Furthermore, the lifting drive system further comprises a first support frame and a second support frame which are spaced apart from each other, the overload protection transmission device is mounted between the first support frame and the second support frame, and both ends of the support shaft are rotatably connected to the first support frame and the second support frame, respectively. The support shaft can rotate relative to the first support frame and the second support frame, thereby reducing the friction between the torque input component and the torque output component and the support shaft, reducing the energy loss during the transmission process of the torque input component and the torque output component, and improving the transmission efficiency of the system.

[0036] Furthermore, the lifting drive system is equipped with two motors, the two motors are respectively located outside the first support frame and the second support frame, and a transmission shaft for transmitting to the torque input component is set between the first support frame and the second support frame, and the transmission shaft can be selectively driven to rotate by one motor or two motors. Torque conversion can be achieved by adjusting the transmission ratio between the transmission shaft and the torque input component, that is, the torque required to be generated by the motor under the same load condition can be reduced, thereby reducing the system's requirements for the selection of motors and the required energy consumption, thereby reducing the operating cost of the system, and at the same time, the transmission shaft can be selectively driven to rotate by one motor or two motors, so that the system can be suitable for different usage requirements, improving the practicality of the system.

[0037] The transfer machine proposed in the utility model comprises a track mechanism and a main machine, wherein the main machine is connected to the track mechanism and can move along the track mechanism. Since the main machine is equipped with the lifting drive system described in any of the above technical solutions, the transfer machine has all the technical effects of the above lifting drive system.

[0038] 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

[0039] The utility model is further described below in conjunction with the accompanying drawings:

[0040] Figure 1 It is a schematic diagram of the overall structure of the lifting drive system of the transfer machine in one embodiment of the utility model;

[0041] Figure 2 It is an overall cross-sectional schematic diagram of a lifting drive system of a transfer machine in one embodiment of the utility model;

[0042] Figure 3 This is a schematic diagram of the overall structure of an overload protection transmission device of a transfer machine in one embodiment of the utility model;

[0043] Figure 4 It is a cross-sectional schematic diagram of an overload protection transmission device of a lift when an axial coupling transmission is established in one embodiment of the utility model;

[0044] Figure 5 It is a cross-sectional schematic diagram of an overload protection transmission device of a lift when the axial coupling transmission is released in one embodiment of the present utility model;

[0045] Figure 6 It is a cross-sectional schematic diagram of an overload protection transmission device of a lift when an axial coupling transmission is established in one embodiment of the utility model;

[0046] Figure 7It is a cross-sectional schematic diagram of the overload protection transmission device of the transfer machine when the axial coupling transmission is released in one embodiment of the utility model.

[0047] Reference numerals:

[0048] 100, active force transmission chain; 110, motor; 120, transmission shaft; 121, active gear; 130, torque input component; 131, first coupling groove;

[0049] 200, passive force transmission chain; 210, rigging; 220, roller; 221, transmission gear; 230, torque output component; 231, second coupling groove; 232, sliding groove;

[0050] 300, a first support frame;

[0051] 400, second support frame;

[0052] 500, support shaft; 510, rotating bearing; 520, axial stopper; 521, pressing gasket; 522, fastener; 530, fixing nut;

[0053] 600, coupling unit; 610, spherical coupling body;

[0054] 700, elastic preload component;

[0055] 800. Elastic buffer component; 810. Installing spring. DETAILED DESCRIPTION

[0056] The overload protection transmission device of the transfer machine proposed in the utility model includes a support shaft, a torque input component rotatably mounted on the support shaft to receive power input, a torque output component rotatably mounted on the support shaft to output power, a coupling unit for establishing axial coupling transmission between the torque input component and the torque output component, and an elastic preload component arranged on the support shaft; wherein at least one of the torque input component and the torque output component can move axially relative to the support shaft, and the elastic preload component applies a preload force to the axially movable torque input component so that the torque input component and the torque output component maintain axial coupling under a predetermined torque, and 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. The above-mentioned overload protection transmission device of the transfer machine can achieve overload protection and improve the safety of the use of the transfer machine.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Reference Figure 1 and Figure 2 The lifting drive system of the transfer machine proposed in one embodiment of the utility model includes a motor 110, a lifting device, and a first support frame 300 and a second support frame 400 that are spaced apart from each other. The lifting device includes a roller 220 and a rigging 210 wound on the roller 220. The rotation of the roller 220 drives the rigging 210 to rise and fall. The roller 220 and the rigging 210 are located between the first support frame 300 and the second support frame 400.

[0062] Compared with the prior art, the lifting drive system also includes an overload protection transmission device of the transfer machine, which includes a support shaft 500, a torque input component 130 rotatably mounted on the support shaft 500 to receive power input, a torque output component 230 rotatably mounted on the support shaft 500 to output power, a coupling unit 600 for establishing axial coupling transmission between the torque input component 130 and the torque output component 230, and an elastic preload component 700 arranged on the support shaft 500. Among them, the torque input component 130 can move axially relative to the support shaft 500, and the elastic preload component 700 applies a preload force to the axially movable torque input component 130, so that the torque input component 130 and the torque output component 230 maintain axial coupling under a predetermined torque, and when the torque output component 230 is subjected to an overload torque, the coupling unit 600 is forced to release the coupling transmission between the torque input component 130 and the torque output component 230 to implement overload protection, wherein the motor 110 transmits the torque to the torque input component 130, and the torque output component 230 transmits the torque to the drum 220.

[0063] In this embodiment, the overload protection transmission device is installed between the first support frame 300 and the second support frame 400, for example: Figure 2 As shown, the two ends of the support shaft 500 are rotatably connected to the first support frame 300 and the second support frame 400, that is, the two ends of the support shaft 500 are rotatably connected to the first support frame 300 and the second support frame 400, and a rotating bearing 510 is installed between the two ends of the support shaft 500 and the first support frame 300 and the second support frame 400; the torque input component 130 and the torque output component 230 adopt conventional gears; the elastic pre-tightening component 700 adopts a conventional butterfly spring, and the elastic pre-tightening component 700 is located on the side of the torque input component 130 away from the coupling unit 600, and one end of the elastic pre-tightening component 700 is abutted against the torque input component 130, and the other end is abutted against the rotating bearing 510 on the second support frame 400, that is, the elastic pre-tightening component 700 is in an elastic deformation state, so that the elastic pre-tightening component 700 applies an elastic force, that is, a pre-tightening force, to the torque input component 130.

[0064] In order to make the motor 110 transmit power to the torque input component 130, the lifting drive system is equipped with a motor 110, which is respectively located outside the first support frame 300 and the second support frame 400, and a transmission shaft 120 for transmitting power to the torque input component 130 is set between the first support frame 300 and the second support frame 400. For example, the transmission shaft 120 is axially fixedly connected with a driving gear 121, which is meshed with the torque input component 130, and the motor 110 drives the transmission shaft 120 to rotate;

[0065] In order to transmit the torque output component 230 to the drum 220, a transmission gear 221 is fixedly connected to one end of the drum 220, and the transmission gear 221 is meshed with the torque output component 230;

[0066] According to the lifting drive system of the transfer machine of this embodiment, in the lifting drive system, the active power transmission chain includes a motor 110, a transmission shaft 120, a driving gear 121 and a torque input component 130, and the passive power transmission chain 200 includes a torque output component 230, a transmission gear 221, a roller 220 and a rigging 210, wherein the axial coupling transmission between the torque input component 130 and the torque output component 230 is realized by the coupling unit 600, that is, the power transmission between the active power transmission chain 100 and the passive power transmission chain 200 is realized, so that the motor 110 can transmit the power to the roller 220 to realize the lifting of the rigging 210. When the upgraded drive system is applied to the lifting machine, under the normal working state of the lifting machine, the torque input component 130 and the torque output component 230 are coupled and transmit torque through the coupling unit 600, and the torque input component 130 outputs the working torque to the torque output component 230 through the coupling unit 600. At the same time, the load on the lifting machine will generate a reverse torque on the torque output component 230 through the roller 220 and the transmission gear 221; wherein the elastic preload component 700 applies a preload force to the axially movable torque input component 130 and sets a threshold value for the working torque that can maintain the coupling transmission of the torque input component 130 and the torque output component 230. This threshold value is the "predetermined torque" mentioned in the utility model. When the load is small and the lifting machine works normally, the reverse torque of the load will not exceed the threshold value, and the coupling unit 600 maintains the coupling state and transmits the working torque; once the load is too large, i.e., overload, the reverse torque of the load will exceed the threshold value, and the axially movable torque input component 130 relative to the support shaft 50 0 axial movement, so that the elastic preload component 700 is subjected to elastic deformation and maintains a tendency to reset, thereby forcing the coupling unit 600 to release the coupling transmission, so that the torque output component 230 idles and does not transmit the reverse torque of the load to the torque input component 130, that is, the passive force transmission chain 200 cannot transmit the torque to the active force transmission chain 100, thereby avoiding the torque input component 130, the driving gear 121, the transmission shaft 120 and the transmission chain of the motor 110 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 230 idles, the torque output component 230 and the transmission gear 221 in the passive force transmission chain 200 are also avoided from being worn or damaged due to the excessive load reverse torque, thereby realizing the overload protection of the transfer machine, preventing the internal transmission structure of the transfer machine from being worn or damaged due to excessive load, thereby 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.

[0067] According to the lifting drive system of the transfer machine of this embodiment, the elastic preload component 700 can absorb and buffer the impact and vibration generated by the coupling unit 600 on the torque input component 130 during the process of releasing the coupling transmission of the coupling unit 600, 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 device.

[0068] In the above technical solution, the support shaft 500 can rotate relative to the first support frame 300 and the second support frame 400, thereby reducing the friction between the torque input component 130 and the torque output component 230 and the support shaft 500, reducing the energy loss during the transmission process of the torque input component 130 and the torque output component 230, and improving the transmission efficiency of the system.

[0069] As a simple transformation of the present embodiment, the torque output component 230 may also slide axially relative to the support shaft 500, and the elastic pre-tightening component 700 may be located on the side of the torque output component 230 away from the coupling unit 600. The elastic pre-tightening component 700 is in an elastic deformation state, and one end of the elastic pre-tightening component 700 abuts against the torque output component 230, thereby applying an elastic force, i.e., a pre-tightening force, to the torque output component 230, so that the torque input component 130 and the torque output component 230 maintain axial coupling under a predetermined torque.

[0070] In the above-mentioned embodiments of the present invention, the number of motors 110 is not limited to one. For example, the lifting drive system is configured with two motors 110, and the two motors 110 are respectively located on the outside of the first support frame 300 and the second support frame 400. The support shaft 500 can be selectively driven to rotate by one motor 110 or two motors 110, so that the system can be adapted to different usage requirements, thereby improving the practicality of the system.

[0071] In the above-mentioned embodiment of the utility model, the torque input component 130 and the torque output component 230 are not limited to gears, and one of a sprocket, a pulley and a friction wheel can also be selected according to actual needs. For example, the torque input component 130 adopts a sprocket, and the transmission shaft 120 is axially fixedly connected with a driving sprocket. The torque input component 130 and the driving sprocket are connected by a chain to realize the transmission of torque.

[0072] In the above-mentioned embodiment of the utility model, the elastic preload component 700 is not limited to the disc spring. According to actual needs, one of the coil 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.

[0073] Reference Figure 2In one embodiment of the utility model, based on the lifting drive system of the transfer machine described in the above embodiment: an axial stopper 520 is installed on the support shaft 500, and the elastic preload component 700 is sleeved on the support shaft 500 and preloaded between the axial stopper 520 and the axially movable torque input component 130. The axial stopper 520 enables the elastic preload component 700 to be directly sleeved on the support shaft 500 without having one end of the elastic preload component 700 fixedly mounted on the support shaft 500, which facilitates the installation and replacement of the elastic preload component 700.

[0074] In order to make the device suitable for different use requirements, the axial stopper 520 includes a compression gasket 521 and a fastener 522 for adjusting the preload force of the elastic preload component 700, for example: Figure 2 and Figure 3 As shown, the fastener 522 adopts a conventional fastening nut, the fastener 522 is threadedly connected to the support shaft 500, the compression gasket 521 is located between the elastic pre-tightening component 700 and the fastener 522, and the elastic pre-tightening component 700 adopts a conventional disc spring, one end of the elastic pre-tightening component 700 abuts against the compression gasket 521, and the other end abuts against the torque input component 130, so that the elastic pre-tightening component 700 applies a pre-tightening force to the torque input component 130. The position of the fastener 522 on the support shaft 500 can be adjusted by rotating the fastener 522, so that the elastic deformation of the elastic pre-tightening component 700 can be adjusted, that is, the pre-tightening force applied by the elastic pre-tightening component 700 is adjustable, so that the elastic pre-tightening component 700 can be adapted to different predetermined torque requirements by setting different pre-tightening forces, that is, the device can be adapted to different use requirements, thereby improving the practicability of the device, and the adjustment method is simple and convenient, thereby improving the convenience of using the device;

[0075] In the above technical solution, the compression gasket 521 is installed between the elastic preload component 700 and the fastener 522. The compression gasket 521 is made of elastic materials such as rubber. The compression gasket 521 can evenly distribute the force applied by the elastic preload component 700 to the fastener 522, thereby reducing wear and stress concentration on the fastener 522. At the same time, the compression gasket 521 can absorb and buffer the impact and vibration generated by the elastic preload component during the elastic deformation process, reduce noise and the impact on the fastener 522, and improve the stability and comfort of the device.

[0076] Reference Figure 3 Preferably, the support shaft 500 is threadedly connected with a fixing nut 530, which is located on the side of the fastener 522 away from the elastic preload component 700 and abuts against the fastener 522, thereby preventing the fastener 522 from slipping during use and affecting the preload force applied by the elastic preload component 700, thereby improving the stability of the device.

[0077] In one embodiment of the present invention, the lifting drive system of the transfer machine described in the above embodiment is as follows: the coupling unit 600 includes a spherical coupling body 610, the end surface of the torque input component 130 is provided with a first coupling groove 131, and the end surface of the torque output component 230 is provided with a second coupling groove 231. The first coupling groove 131 and the second coupling groove 231 are respectively engaged with the spherical coupling body 610 to establish axial coupling. When the torque output component 230 is subjected to overload torque, the spherical coupling body 610 is forced to disengage from the first coupling groove 131 to release the coupling transmission between the torque input component 130 and the torque output component 230. For example, Figure 4 and Figure 5 As shown, the spherical coupling body 610 adopts a conventional spherical steel ball, and there are multiple of them. The number of the first coupling grooves 131 and the second coupling grooves 231 are both multiple and arranged in a one-to-one correspondence with the spherical coupling body 610. The multiple first coupling grooves 131 are evenly arranged along the circumferential direction of the torque input component 130, and the multiple second coupling grooves 231 are evenly arranged along the circumferential direction of the torque output component 230. The first coupling grooves 131 and the second coupling grooves 231 are respectively engaged with the corresponding spherical coupling body 610, that is, the groove walls of the first coupling grooves 131 and the second coupling grooves 231 are both arranged in arc surfaces and adapted to the arc surfaces of the spherical coupling body 610.

[0078] According to the lifting drive system of the transfer machine of the present embodiment, if the reverse torque applied by the load to the torque output component 230 is less than the predetermined torque, the first coupling groove 131 and the second coupling groove 231 respectively remain engaged with the corresponding spherical coupling body 610, that is, the spherical coupling body 610 abuts against the groove walls of the first coupling groove 131 and the second coupling groove 231, thereby establishing an axial coupling transmission between the torque input component 130 and the torque output component 230, so that the transfer machine can work normally. If the reverse torque applied by the load to the torque output component 230 is greater than the predetermined torque, under the interaction of forces, the spherical coupling body 610 will apply a thrust extending in the axial direction of the support shaft 500 to the groove wall of the first coupling groove 131, and the thrust is greater than the preload force, so that the elastic preload component 700 is elastically deformed under the force and maintains a tendency to reset, thereby pushing the torque input component 130 to move axially, so that the spherical coupling body 610 disengages from the first coupling groove 131 to release the coupling transmission between the torque input component 130 and the torque output component 230, thereby realizing overload protection of the shifting machine, preventing the internal transmission structure of the shifting machine from being worn or damaged due to excessive load, thereby increasing the service life of the shifting machine, reducing the risk of safety accidents caused by damage to the shifting machine, and thus improving the safety performance of the shifting machine.

[0079] According to the lifting drive system of the transfer machine of this embodiment, when the overloaded load is reduced to the point where the reverse torque generated by the load is again less than the predetermined torque, the elastic preload component 700 is reset and the axially movable torque input component 130 is reset to slide, and the motor 110 drives the torque input component 130 to rotate. During the rotation, the spherical coupling body 610 will engage with the corresponding first coupling groove 131, so that the torque input component 130 can establish an axial coupling transmission with the torque output component 230 through the coupling unit 600 again. At this time, the torque input component 130 and the torque output component 230 can transmit torque to each other again, so that the transfer machine can be used normally again without manual reset, thereby improving the convenience of using the transfer machine.

[0080] Reference Figure 4 Preferably, the groove wall area of ​​the first coupling groove 131 is less than half of the surface area of ​​the spherical coupling body 610, that is, while ensuring that the torque input component 130 can apply a thrust along the axial direction of the support shaft 500 to the spherical coupling body 610 through the groove wall of the first coupling groove 131, the contact area between the first coupling groove 131 and the spherical coupling body 610 is reduced, which makes it easier to disengage the first coupling groove 131 from the spherical coupling body 610, reduces the risk of being unable to release the coupling transmission due to the excessive contact area between the first coupling groove 131 and the spherical coupling body 610, and improves the stability of the device.

[0081] In one embodiment of the present invention, based on the lifting drive system of the transfer machine described in the above embodiment: the overload protection transmission device also includes an elastic buffer component 800, which provides buffering for the torque output component 230 when the coupling unit 600 releases the coupling transmission between the torque input component 130 and the torque output component 230.

[0082] In order to make the elastic buffer component 800 provide buffering for the torque output component 230 when the coupling unit 600 is decoupled, the torque output component 230 can also move axially relative to the support shaft 500, and the torque input component 130 and the torque output component 230 are pre-tightened between the elastic buffer component 800 and the elastic pre-tightening component 700. Figure 4 and Figure 5As shown, the elastic buffer component 800 adopts a conventional butterfly spring. The elastic buffer component 800 is located on the side of the torque output component 230 away from the coupling unit 600. The elastic buffer component 800 is sleeved on the support shaft 500. One end of the elastic buffer component 800 is abutted against the torque output component 230, and the other end is abutted against the rotating bearing 510 on the first support frame 300, so that the elastic buffer component 800 is in an elastic deformation state, so that the elastic buffer component 800 applies a certain elastic force to the torque output component 230, and the elastic force applied by the elastic buffer component 800 is less than the preload force applied by the elastic preload component 700.

[0083] According to the lifting drive system of the shifting machine of this embodiment, during the process of decoupling transmission of the coupling unit 600, the reverse torque will apply force to the spherical coupling body 610 through the torque output component 230. Under the interaction of forces, the spherical coupling body 610 will generate a thrust, i.e., an impact force, along the axial direction of the support shaft 500 on the torque input component 130 and the torque output component 230, and the impact force is greater than the preload force applied by the elastic preload component 700. The elastic preload component 700 is elastically deformed under the force, so that the elastic preload component 700 can absorb and buffer the impact and vibration generated by the spherical coupling body 610 on the torque input component 130 while in the decoupling state; and in this process, since the torque output component 230 can also move axially relative to the support shaft 500, the elastic force applied by the elastic buffer component 800 to the torque output component 230 is smaller than that of the spherical coupling body 610. 0 exerts an impact force thereon, causing the torque output component 230 to slip, and the elastic buffer component 800 undergoes elastic deformation under the force to buffer the torque output component 230, that is, the elastic buffer component 800 can absorb and buffer the impact and vibration generated by the coupling unit 600 on the torque output component 230; and when the elastic preload component 700 resets and drives the torque input component 130 and the torque output component 230 to couple and transmit again, the torque input component 130 will generate an impact force on the torque output component 230, causing the torque output component 230 to slip, and the elastic buffer component 800 undergoes elastic deformation again to buffer, so as to reduce the impact and vibration generated on the torque output component 230, reduce the influence of the noise and impact energy generated during the use of the device on various components, thereby extending the service life of various components and improving the comfort and stability of the device.

[0084] In the above technical solution, the elastic force applied by the elastic buffer component 800 can be adjusted by adjusting the specifications of the elastic buffer component 800, such as the number of butterfly springs, so that the impact energy can be balanced by adjusting the specifications of the elastic buffer component 800 and the spring preload component, so that the device can be adapted to different usage requirements. At the same time, the elastic buffer component 800 is externally arranged relative to the torque input component 130 and the torque output component 230, which makes it easier to replace the elastic buffer component 800 and adjust the specifications, and will not affect the strength of the torque input component 130 and the torque output component 230, thereby ensuring the stability of the device.

[0085] In this embodiment, the elastic buffer component 800 is not limited to the butterfly spring, and can also be a coil spring, a rubber spring or a combination thereof according to actual needs.

[0086] In one embodiment of the present invention, based on the lifting drive system of the transfer machine described in the above embodiment: the overload protection transmission device also includes an elastic buffer component 800, which provides buffering for the torque output component 230 when the coupling unit 600 releases the coupling transmission between the torque input component 130 and the torque output component 230.

[0087] In order to make the elastic buffer component 800 provide buffering for the torque output component 230 when the coupling unit 600 releases the coupling transmission, the elastic buffer component 800 is built in the torque output component 230, and acts on the coupling unit 600 to provide buffering when the coupling unit 600 releases the coupling transmission between the torque input component 130 and the torque output component 230. Figure 6 and Figure 7 As shown, the groove wall area of ​​the second coupling groove 231 is greater than or equal to half of the surface area of ​​the spherical coupling body 610, and the groove bottom of the second coupling groove 231 is provided with a sliding groove 232, which extends along the axial direction of the support shaft 500 and has a groove opening diameter equal to the diameter of the spherical coupling body 610, so as to ensure that the spherical coupling body 610 can slide in the sliding groove 232 and can also abut against the groove wall of the second coupling groove 231 to achieve mutual torque transmission between the torque input component 130 and the torque output component 230. The elastic buffer component 800 is a plurality of mounting springs 810 corresponding to the spherical coupling body 610 one by one, and the mounting spring 810 adopts a conventional coil spring, one end of which is fixedly connected to the groove bottom of the corresponding sliding groove 232, and the other end is fixedly connected to the corresponding spherical coupling body 610.

[0088] According to the lifting drive system of the transfer machine of this embodiment, during the process of releasing the coupling transmission of the coupling unit 600, the reverse torque applies force to the spherical coupling body 610 through the torque output component 230. Under the interaction of forces, the spherical coupling body 610 will apply a thrust, i.e., an impact force, along the axial direction of the support shaft 500 to the torque input component 130 and the torque output component 230, and the impact force is greater than the preload force applied by the elastic preload component 700. The elastic preload component 700 is elastically deformed by the force, so that when the coupling transmission between the torque input component 130 and the torque output component 230 is released, the elastic preload component 700 can absorb and buffer the impact and vibration generated by the coupling unit 600 on the torque input component 130; at the same time, during this process, the spherical coupling body 610 will apply pressure to the corresponding mounting spring 810 on the torque output component 230, so that the spherical coupling body 610 When sliding in the sliding groove 232, the mounting spring 810 is subjected to elastic deformation and maintains a tendency to reset, so that the mounting spring 810 absorbs and buffers the impact and vibration generated by the spherical coupling body 610 on the torque input component 130, thereby reducing the noise and the impact on various components during the coupling transmission release process; and when the elastic preload component 700 resets to drive the torque input component 130 and the torque output component 230 to couple again, the torque input component 130 will apply pressure to the mounting spring 810 again, so that the mounting spring 810 is elastically deformed again and buffered, so as to reduce the impact and vibration generated by the torque input component 130 on the torque output component 230 when coupling again, thereby reducing the noise and impact energy generated during the use of the device. The impact on various components, extending the service life of various components, and improving the comfort and stability of the device.

[0089] In the above technical solution, the mounting spring 810 is built into the second coupling groove 231, thereby reducing the installation space required for the entire device, while reducing the impact of external factors on the elastic buffer component 800, and improving the stability of the device.

[0090] In this embodiment, the elastic buffer component 800 is not limited to the coil spring, and may be a butterfly spring, a rubber spring, or a combination thereof according to actual needs.

[0091] In one embodiment of the utility model, the lifting drive system of the transfer machine is based on the above-mentioned embodiment: the coupling unit 600 includes a first concave-convex structure distributed circumferentially on the end surface of the torque input component 130 and a second concave-convex structure distributed circumferentially on the end surface of the torque output component 230, the first concave-convex structure and the second concave-convex structure are embedded in each other to establish axial coupling, and when the torque output component 230 is subjected to overload torque, the first concave-convex structure and the second concave-convex structure are forced to separate to release the coupling transmission between the torque input component 130 and the torque output component 230. Exemplary: the torque input component 130 and the torque output component 230 adopt conventional pulleys, the first concave-convex structure is a first tooth block portion opened on the end face of the torque input component 130, and the second concave-convex structure is a second tooth block portion opened on the end face of the torque output component 230, the first tooth block portion can be meshed with the second tooth block portion, the first tooth block portion includes a plurality of first tooth blocks uniformly arranged along the circumference of the torque input component 130, the second tooth block portion includes a plurality of second tooth blocks uniformly arranged along the circumference of the torque output component 230, both sides of the first tooth block and the second tooth block for meshing are arranged in an inclined surface, the first tooth block portion and the second tooth block portion mesh with each other so that the torque input component 130 and the torque output component 230 establish axial coupling under a predetermined torque.

[0092] According to the lifting drive system of the shifting machine of the present embodiment, when the reverse torque is greater than the predetermined torque, the reverse torque acts on the torque output component 230. Since the two sides of the first tooth block and the second tooth block for meshing are arranged in an inclined surface, the second tooth block will apply a preload force greater than the preload force applied by the elastic preload component 700 to the first tooth block and a thrust along the axial direction of the support shaft 500. The elastic preload component 700 is elastically deformed under the force and maintains a tendency to reset, thereby pushing the torque input component 130 to slide axially relative to the support shaft 500, thereby canceling the meshing state of the first tooth block portion and the second tooth block portion, that is, separating the first concave-convex structure and the second concave-convex structure to release the coupling transmission between the torque input component 130 and the torque output component 230, thereby realizing overload protection of the shifting machine.

[0093] In one of the embodiments of the utility model, a shifting machine is proposed, including a track mechanism and a main machine, wherein the main machine is connected to the track mechanism and can move along the track mechanism, and the main machine is configured with the lifting drive system described in any of the above technical solutions. Exemplary: the track mechanism adopts a conventional guide rail and is installed on the ceiling, and the main machine can move along the guide rail; wherein the people and objects that need to be moved and lifted act on the rigging 210 of the lifting drive system, thereby applying a load to the passive force transmission chain 200 of the lifting drive system, and the load will generate a reverse torque on the torque output component 230 in the passive force transmission chain 200. When the load is small and the shifting machine works normally, the reverse torque of the load will not exceed the predetermined torque, and the coupling unit 600 maintains the coupling state and transmits the working torque, even if the active force transmission chain 100 can transmit power to the passive force transmission chain 200, thereby realizing the lifting of objects or people on the rigging 210, and the main machine can move along the track mechanism, that is, the main machine It can slide on the ceiling to achieve the transfer of objects or people on the rigging 210; once the load is too large, that is, overload, the reverse torque of the load will exceed the predetermined torque, thereby forcing the coupling unit 600 to release the coupling transmission, so that the torque output component 230 idles and does not transmit the reverse torque of the load to the torque input component 130, that is, the passive force transmission chain 200 in the lifting drive system cannot transmit the torque to the active force transmission chain 100, thereby realizing overload protection of the transfer machine, preventing the internal transmission structure of the transfer machine from being worn or damaged due to excessive load, thereby increasing the service life of the transfer machine, reducing the risk of safety accidents caused by damage to the transfer machine, and thus improving the safety performance of the transfer machine.

[0094] 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. The overload protection transmission device of the transfer machine is characterized in that: include: Support shaft; as well as, a torque input component rotatably mounted on the support shaft to receive power input, and, a torque output component rotatably mounted on the support shaft for power output, and, A coupling unit, used to establish an axial coupling transmission between the torque input component and the torque output component; An elastic pre-tightening component disposed on the support shaft; Among them, at least one of the torque input component and the torque output component can move axially relative to the support shaft, and the elastic pre-tightening component applies a pre-tightening 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 under a predetermined torque, and 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.

2. The overload protection transmission device of the transfer machine 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 are respectively engaged with the spherical coupling body to establish axial coupling. When the torque output component is subjected to overload torque, the spherical coupling body is forced to disengage from the first coupling groove or the second coupling groove to release the coupling transmission between the torque input component and the torque output component.

3. The overload protection transmission device of the transfer machine 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. When the torque output component is subjected to overload torque, the first concave-convex structure and the second concave-convex structure are forced to separate to release the coupling transmission between the torque input component and the torque output component.

4. The overload protection transmission device of the transfer machine as claimed in claim 1, characterized in that: An axial stop is provided on the support shaft, and the elastic preload component is sleeved on the support shaft and preloaded between the axial stop and the axially movable torque input component or torque output component.

5. The overload protection transmission device of the transfer machine as claimed in claim 4, characterized in that: The axial stop includes a compression gasket and a fastener, the compression gasket abuts against the elastic preload component, and the fastener is threadedly connected to the support shaft for adjusting the preload force of the elastic preload component.

6. The overload protection transmission device of the transfer machine as claimed in 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.

7. The overload protection transmission device of a transfer machine according to any one of claims 1 to 6, characterized in that: The overload protection transmission device further comprises an elastic buffer component, which provides buffering for the torque input component or the torque output component when the coupling unit releases the coupling transmission between the torque input component and the torque output component.

8. The overload protection transmission device of the transfer machine as claimed in claim 7, characterized in that: The torque input component and the torque output component are both axially movable relative to the support shaft, and the torque input component and the torque output component are pre-tightened between the elastic buffer component and the elastic pre-tightening component.

9. The overload protection transmission device of the transfer machine as claimed in claim 7, characterized in that: The elastic buffer component is built in the torque input component or the torque output component, and acts on the coupling unit to provide buffering when the coupling unit releases the coupling transmission between the torque input component and the torque output component.

10. The overload protection transmission device of the transfer machine as claimed in claim 7, characterized in that: The elastic buffer component is one of a disc spring, a coil spring, and a rubber spring, or a combination thereof.

11. The overload protection transmission device of a transfer machine according to any one of claims 1 to 6, 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.

12. 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 overload protection transmission device as claimed in any one of claims 1 to 11, wherein the motor is driven by the torque input component, and the torque output component is driven by the drum.

13. The lifting drive system of the transfer machine according to claim 12, 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 overload protection transmission device is installed between the first support frame and the second support frame, and both ends of the support shaft are rotatably connected to the first support frame and the second support frame respectively.

14. The lifting drive system of the transfer machine according to claim 13, characterized in that: The lifting drive system is configured with two motors, which are respectively located on the outside of the first support frame and the second support frame. A transmission shaft for transmitting to the torque input component is arranged between the first support frame and the second support frame, and the transmission shaft can be selectively driven to rotate by one motor or two motors.

15. 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, It is characterized in that The host is equipped with a lifting drive system as described in any one of claims 12 to 14.

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