Protection transmission device and transmission equipment

Abstract

The utility model provides a protection transmission device and transmission equipment. The protection transmission device comprises an input part, an output part, a lead screw and a sliding assembly. The end face of the output piece is provided with a groove. One end of the screw rod is connected with the input piece; the other end of the lead screw penetrates through the output piece, and the lead screw is in friction connection with the output piece. The sliding assembly comprises a nut, a sliding block and a connecting rod. The nut is in threaded transmission connection with the lead screw; the sliding block is arranged in the groove and is in sliding connection with the output piece; and the other end of the connecting rod is hinged with the sliding block. The transmission equipment comprises a rack and the protection transmission device, and the two ends of the lead screw are rotationally connected with the rack. According to the transmission device, one side of the sliding block can abut against the side wall of the groove of the output piece in the sliding process, when the external force borne by the output piece is larger than the friction force between the sliding block and the output piece, reverse driving of the output piece can be achieved, the output piece is protected, and therefore the service life of the transmission device is prolonged.

Description

Technical Field

[0001] The present application belongs to the field of mechanical transmission technology, and more specifically, relates to a protective transmission device and a transmission equipment. Background Art

[0002] The mechanical transmission mode of the gearbox assembly is a widely used transmission form in mechanical transmission, but the commonly used mechanical transmission structure of the gearbox assembly has the following problems:

[0003] When the gearbox speed ratio is too large, reverse drive cannot be achieved, and when subjected to excessive external force impact, the internal gears are easily damaged, causing the entire structure to fail. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a protective transmission device and a transmission equipment to solve the technical problems in the prior art that the gearbox speed ratio is too large and the gears are easily damaged when subjected to excessive external force impact.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a protective transmission device, including an input member, an output member, a screw rod and a sliding assembly; the end face of the output member has a groove; one end of the screw rod is connected to the input member; the other end of the screw rod passes through the output member, and the screw rod is connected to the output member; the sliding assembly includes a nut, a slider and a connecting rod; the nut is threadedly connected to the screw rod; the slider is in the groove and is slidingly connected to the output member; one end of the connecting rod is hinged to the nut, and the other end of the connecting rod is hinged to the slider; wherein the slider can slide along the radial direction of the output member, and when the nut is at the extreme position, the slider abuts against the side wall of the groove.

[0006] Optionally, the output member is an output gear, a center hole is provided in the middle of the output gear, and the screw rod passes through the center hole and is frictionally connected to the output gear.

[0007] Optionally, the sliding assembly further comprises a mounting block, wherein the mounting block is disposed in the groove, a sliding groove is provided on the mounting block, and the sliding block is slidably connected to the mounting block in the sliding groove.

[0008] In the present application, the design of the mounting block makes the sliding of the slider in the groove more stable, and the slide groove provides a clear sliding path for the slider, thereby enhancing the stability and reliability of the structure.

[0009] Optionally, a side wall of the slide groove is provided with a recessed guide groove; a side wall of the slide block is provided with a raised guide rail, and the guide rail is slidably connected to the guide groove.

[0010] In the present application, the coordinated use of the guide rail and the guide groove makes the sliding block slide more smoothly in the slide groove, reduces friction resistance, and improves transmission efficiency.

[0011] In the present application, the center hole of the output gear can provide an installation space for the screw rod, so that the screw rod can pass through the output gear and frictionally connect with the output gear to achieve power transmission.

[0012] Optionally, the sliding assembly further includes a first pin shaft, a first connecting hole is provided on the nut, a first matching hole is provided at one end of the connecting rod, and the first pin shaft passes through the first connecting hole and the first matching hole to be connected to the nut and the connecting rod respectively.

[0013] In the present application, the first pin shaft can connect the nut and one end of the connecting rod together, so that when the nut moves linearly on the screw rod, it can drive the connecting rod to swing, thereby driving the slider to slide in the groove.

[0014] Optionally, the sliding assembly further includes a second pin shaft, a second connecting hole is provided on the slider, a second matching hole is provided at the other end of the connecting rod, and the second pin shaft passes through the second connecting hole and the second matching hole to be connected to the slider and the connecting rod respectively.

[0015] In the present application, the second pin shaft can connect the slider and the other end of the connecting rod together, so that when the connecting rod swings, it can drive the slider to slide in the groove along the radial direction of the output member.

[0016] Optionally, there are a plurality of slide grooves, and the plurality of slide grooves are distributed in a circular array; there are a plurality of sliders, and there are a plurality of connecting rods, and the sliders, the connecting rods and the slide grooves are arranged in a one-to-one correspondence.

[0017] In the present application, the design of multiple sliders and connecting rods makes the structure more stable and can better resist external force impact. At the same time, the circular array distribution of the slide groove makes the slider more evenly distributed on the end face of the output member and the force is more balanced.

[0018] Optionally, the grooves are provided on both sides of the output member; and the sliding components are provided in two groups, and the two groups of sliding components are respectively located on both sides of the output member.

[0019] In the present application, two sets of sliding components are provided so that the protective transmission device can provide support and protection from both sides simultaneously when it is impacted by external force, thereby enhancing the stability and reliability of the structure.

[0020] Optionally, the screw rods on both sides of the output member have the same or opposite rotation directions.

[0021] In the present application, by changing the rotation direction of the screw rod, the movement direction of the nuts on both sides can be controlled, thereby changing the limiting direction of the slider on the output member, so that the protective transmission device has better adaptability and flexibility.

[0022] The present application also provides a transmission device, including a frame and the above-mentioned protective transmission device, and both ends of the screw rod are respectively rotatably connected to the frame.

[0023] The beneficial effects of the protective transmission device and transmission equipment provided by the present application are as follows: compared with the prior art, in the protective transmission device of the present application, the input part drives the screw rod to rotate, and then drives the output part to rotate; while the screw rod rotates, it can also drive the nut to move along the length direction of the screw rod, and then drive the slider to move through the connecting rod, and one side of the slider can abut against the side wall of the output part groove during the sliding process. When the external force applied to the output part is greater than the friction force between the slider and the output part, the output part can be reversely driven, which protects the output part and thus increases the service life of the transmission equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a protective transmission device provided in an embodiment of the present application;

[0026] Figure 2 A schematic cross-sectional structure diagram of a protective transmission device provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of a three-dimensional structure of an output member in a protective transmission device provided in an embodiment of the present application;

[0028] Figure 4 A schematic diagram of a three-dimensional structure of a nut in a protective transmission device provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of the three-dimensional structure of a slider in a protective transmission device provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the three-dimensional structure of a mounting block in a protective transmission device provided in an embodiment of the present application;

[0031] Figure 7A schematic diagram of the three-dimensional structure of a connecting rod in a protective transmission device provided in an embodiment of the present application.

[0032] Among them, the reference numerals in the figure are:

[0033] 100-input piece;

[0034] 200- output member; 201- groove; 202- middle hole; 203- annular protrusion;

[0035] 300-screw;

[0036] 400-nut; 401-first connecting hole;

[0037] 500-slider; 501-guide rail; 502-second connecting hole;

[0038] 600-connecting rod; 601-first matching hole; 602-second matching hole;

[0039] 700-mounting block; 701-slideway; 702-guide groove; 703-mounting hole;

[0040] 800-bearing;

[0041] 901-first pin; 902-second pin. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] Please also read Figure 1 and Figure 2 , the protection transmission device provided by the embodiment of the present application is now described. The protection transmission device comprises an input member 100, an output member 200, a screw rod 300 and a sliding assembly; the end surface of the output member 200 has a groove 201; one end of the screw rod 300 is connected to the input member 100; the other end of the screw rod 300 passes through the output member 200, and the screw rod 300 is frictionally connected to the output member 200; the sliding assembly comprises a nut 400, a slider 500 and a connecting rod 600; the nut 400 is threadedly connected to the screw rod 300; the slider 500 is in the groove 201 and is slidably connected to the output member 200; one end of the connecting rod 600 is hinged to the nut 400, and the other end of the connecting rod 600 is hinged to the slider 500; wherein the slider 500 can slide along the radial direction of the output member 200, and when the nut 400 is at the extreme position, the slider 500 abuts against the side wall of the groove 201.

[0047] It is understandable that the input member 100 is used to connect the drive structure to transmit power. For example, the drive structure can be a motor, the input member 100 is an input gear, the output shaft of the motor is connected to a one-stage or two-stage gear transmission assembly, the input member 100 is meshed with the output end of the gear transmission assembly, and the rotation of the motor can drive the input member 100 to rotate, and then drive the screw rod 300 to rotate.

[0048] In another embodiment of the present application, the input member 100 may also be a driven pulley, and a driving pulley is connected to the output shaft of the motor, and the driven pulley may be connected to the driving pulley through a transmission belt to form a complete belt transmission structure. When the driving pulley is subjected to a driving force, the driven pulley can rotate with it through the transmission of the transmission belt, thereby achieving effective power transmission. This design not only simplifies the transmission structure, but also improves the transmission efficiency, making the entire mechanical system more efficient and stable.

[0049] In this embodiment, the screw rod 300 has an external thread, the nut 400 has an internal thread, and the screw rod 300 and the nut 400 are threadedly connected.

[0050] In this embodiment, the design of the screw rod 300 and the nut 400 cleverly realizes the threaded transmission connection, which not only ensures the stability and reliability of the connection, but also greatly improves the working efficiency. The external thread design of the screw rod 300 allows it to be closely matched with the internal thread of the nut 400. By rotating the screw rod 300, the nut 400 can be easily moved up and down on the screw rod 300.

[0051] Compared with the prior art, the protective transmission device provided by the present application has an input member 100 that drives the screw rod 300 to rotate, thereby driving the output member 200 to rotate; while the screw rod 300 rotates, it can also drive the nut 400 to move along the length direction of the screw rod 300, and then drive the slider 500 to move through the connecting rod 600. One side of the slider 500 can abut against the side wall of the groove 201 of the output member 200 during the sliding process. When the external force applied to the output member 200 is greater than the friction between the slider 500 and the output member 200, the output member 200 can be reversely driven, which protects the output member 200 and improves the service life of the transmission equipment.

[0052] In one embodiment of the present application, see Figure 3 The output member 200 is an output gear, a middle hole 202 is provided in the middle of the output gear, and the screw rod 300 passes through the middle hole 202 and is frictionally connected with the output gear.

[0053] In this embodiment, the friction connection between the screw rod 300 and the output gear means that when the external force is smaller than the friction force between the screw rod 300 and the output gear, the output gear will rotate together with the screw rod 300, and there will be no relative rotation between the screw rod 300 and the output gear; when the external force is larger than the friction force between the screw rod 300 and the output gear, there will be relative rotation between the screw rod 300 and the output gear.

[0054] In this embodiment, the center hole 202 of the output gear can provide an installation space for the screw rod 300, so that the screw rod 300 can pass through the output gear and then be frictionally connected with the output gear to achieve power transmission.

[0055] It can be understood that the rotation of the screw rod 300 can drive the output member 200 to rotate, and can also drive the nut 400 to move along the length direction of the screw rod 300, and the nut 400 then drives the slider 500 to move through the connecting rod 600; the rotation speed of the screw rod 300 remains unchanged, and when the slider 500 abuts against the side wall of the groove 201 of the output member 200, the movement of the nut 400 along the length direction of the screw rod 300 slows down (there is a certain amount of slippage), at this time, relative rotation occurs between the output member 200 and the screw rod 300, and the rotation speed of the output member 200 will slowly decrease until the external force applied to the output member 200 is greater than the friction between the slider 500 and the output member 200, and the output member 200 starts to rotate in the opposite direction.

[0056] In one embodiment of the present application, please refer to Figure 2 , Figure 4 and Figure 7 The sliding assembly also includes a first pin shaft 901, a first connecting hole 401 is provided on the nut 400, a first matching hole 601 is provided at one end of the connecting rod 600, and the first pin shaft 901 passes through the first connecting hole 401 and the first matching hole 601, and is connected to the nut 400 and the connecting rod 600 respectively.

[0057] In this embodiment, the design of the first pin 901 not only ensures a stable connection between the nut 400 and the connecting rod 600, but also realizes power transmission between the two. When the nut 400 performs a linear motion on the screw rod 300, the movement of the nut 400 can be converted into the swing of the connecting rod 600 through the bridge effect of the first pin 901. This swinging motion then drives the slider 500 to slide smoothly and stably in the groove 201.

[0058] In one embodiment of the present application, please refer to Figure 2 , Figure 4 and Figure 7 The sliding assembly also includes a second pin 902. The slider 500 is provided with a second connecting hole 502. The other end of the connecting rod 600 is provided with a second matching hole 602. The second pin 902 passes through the second connecting hole 502 and the second matching hole 602, and is connected to the slider 500 and the connecting rod 600 respectively.

[0059] In this embodiment, the second pin shaft 902 can connect the slider 500 and the other end of the connecting rod 600 together, so that when the connecting rod 600 swings, it can drive the slider 500 to slide in the groove 201 along the radial direction of the output member 200.

[0060] In addition, in order to further improve the stability and durability of the sliding assembly, lubricants can be added to key parts (such as the connection between the first pin 901 and the nut 400 and the connecting rod 600, and the connection between the second pin 902 and the slider 500 and the connecting rod 600) to reduce friction and wear. At the same time, for wearing parts, such as the first pin 901 and the second pin 902, they also need to be regularly inspected and replaced to ensure the long-term stable operation of the entire system.

[0061] In one embodiment of the present application, please refer to Figure 1 and Figure 6 The sliding assembly further includes a mounting block 700 , which is disposed in the groove 201 . A slide groove 701 is disposed on the mounting block 700 , and the slider 500 is slidably connected to the mounting block 700 in the slide groove 701 .

[0062] In this embodiment, the design of the mounting block 700 makes the sliding of the slider 500 in the groove 201 more stable. At the same time, the slide groove 701 provides a clear sliding path for the slider 500, thereby enhancing the stability and reliability of the structure.

[0063] In one embodiment of the present application, please refer to Figure 5 and Figure 6 The side wall of the slide groove 701 is provided with a recessed guide groove 702 ; the side wall of the slider 500 is provided with a raised guide rail 501 , and the guide rail 501 is slidably connected to the guide groove 702 .

[0064] In this embodiment, the coordinated use of the guide rail 501 and the guide groove 702 enables the sliding block 500 to slide more smoothly in the sliding groove 701, reduces friction resistance, and improves transmission efficiency.

[0065] In another embodiment, a plurality of balls or rollers may be provided at the bottom of the slide groove 701 to further reduce the friction when the slider 500 slides in the slide groove 701. These balls or rollers can roll when the slider 500 moves, converting the sliding friction into rolling friction, greatly reducing the friction resistance, and making the slider 500 slide more easily.

[0066] In one embodiment of the present application, please refer to Figure 1 and Figure 6 There are multiple slide grooves 701, and the multiple slide grooves 701 are distributed in a circular array; there are multiple sliders 500, and there are multiple connecting rods 600, and the sliders 500, the connecting rods 600 and the slide grooves 701 are arranged in a one-to-one correspondence.

[0067] In this embodiment, the one-to-one correspondence between the slider 500, the connecting rod 600 and the slide groove 701 means that the number of the slider 500, the connecting rod 600 and the slide groove 701 is equal, one slide groove 701 accommodates one slider 500, and one slider 500 is connected to one connecting rod 600.

[0068] In this embodiment, the design of multiple sliders 500 and connecting rods 600 makes the structure more stable and can better resist external force impact. At the same time, the circular array distribution of the slide groove 701 makes the slider 500 more evenly distributed on the end face of the output member 200 and the force is more balanced.

[0069] In this embodiment, the design of the slider 500 takes into account the close fit with the slide groove 701, and its shape and size are precisely calculated to ensure that it can slide smoothly in the slide groove 701 without getting stuck or falling off. The material of the slider 500 can be rubber, mainly to drive the slider 500 to continuously contact the output member 200 through the continuous movement of the nut 400, and compensate for the attenuation of the force between the slider 500 and the output member 200 due to wear; when the slider 500 and the output member 200 are continuously in contact and friction, the longer the time, the greater the wear. At this time, the greater the force of the slider 500 and the output member 200 to contact can ensure the effect of the slider 500 and the output member 200.

[0070] In this embodiment, the connecting rod 600 is a key component connecting the slider 500 and the slide groove 701, and its strength and flexibility are fully considered. The connecting rod 600 is made of high-strength material and can withstand a large tensile force, ensuring the stability of the entire device. At the same time, the design of the connecting rod 600 also has a certain elasticity, which can absorb the impact force generated by sliding to a certain extent, reducing the risk of damage to the device due to vibration.

[0071] In this embodiment, the design of the slide groove 701 takes into account the smoothness and precision of sliding. The interior of the slide groove 701 is treated with a smooth surface, which reduces the friction resistance of the slider 500 during the sliding process and improves the sliding efficiency. At the same time, the length and depth of the slide groove 701 are also accurately calculated to ensure that the slider 500 can slide stably inside it without exceeding its range.

[0072] In this embodiment, the material of the mounting block 700 is not specifically limited and can be selected according to needs; the mounting block 700 is also provided with a mounting hole 703, and the mounting hole 703 is fixed in the groove 201 of the output member 200 by means of screws; the fixing method of the mounting block 700 and the output member 200 is not specifically limited and can also be other fixing methods, such as: bonding, etc.

[0073] In one embodiment of the present application, see Figure 3 The end surface of the output member 200 has an annular protrusion 203 , and the interior of the annular protrusion 203 and the end surface of the output member 200 are surrounded to form a groove 201 .

[0074] In one embodiment of the present application, see Figure 2 , grooves 201 are provided on both sides of the output member 200; there are two groups of sliding components, and the two groups of sliding components are respectively located on both sides of the output member 200.

[0075] In this embodiment, two sets of sliding components are provided so that the protective transmission device can provide support and protection from both sides simultaneously when impacted by external force, thereby enhancing the stability and reliability of the structure.

[0076] In one embodiment of the present application, the screw rods 300 located on both sides of the output member 200 have the same or opposite rotation directions.

[0077] In this embodiment, according to actual needs, the rotation directions of the screw rod 300 can be selected to be the same or opposite to meet different transmission requirements.

[0078] It is understandable that when the screw rod 300 has the same rotation direction, the nuts 400 on both sides will move toward the same end of the screw rod 300 when the screw rod 300 rotates; when the screw rod 300 has opposite rotation directions, the nuts 400 on both sides will move toward the two ends of the screw rod 300 when the screw rod 300 rotates. By changing the rotation direction of the screw rod 300, the movement direction of the nuts 400 on both sides can be controlled, thereby changing the limiting direction of the slider 500 on the output member 200, so that the protective transmission device has better adaptability and flexibility.

[0079] The protection transmission device provided by the present application drives the screw rod 300 to rotate through the input member 100, and the screw rod 300 and the output member 200 are frictionally driven, thereby driving the output member 200 to rotate. During the rotation of the screw rod 300, the nut 400 is threadedly connected with the screw rod 300, so that the nut 400 moves along the axial direction of the screw rod 300, thereby driving the slider 500 to slide along the radial direction of the output member 200 through the connecting rod 600. When subjected to excessive external force impact, the friction transmission between the screw rod 300 and the output member 200 will fail, and the slider 500 will abut against the side wall of the groove 201. Through the friction between the slider 500 and the side wall of the groove 201, the rotation of the output member 200 is slowed down until the output member 200 rotates in the opposite direction, thereby achieving protection of the output member 200. The protective transmission device provided in the present application solves the technical problems in the prior art that the gearbox speed ratio is too large and the gears are easily damaged when subjected to excessive external force impact by setting the friction effect between the slider 500 and the groove 201, thereby achieving protection of the output member 200 and improving the reliability of the protective transmission device.

[0080] The present application also provides a transmission device (not shown), which includes a frame and the above-mentioned protective transmission device, and both ends of the screw rod 300 are rotatably connected to the frame respectively.

[0081] The transmission device provided by the present application includes a frame and the above-mentioned protective transmission device. By setting the frame, the screw rod 300 can be rotatably connected with the frame, thereby achieving the fixation of the entire protective transmission device and improving the stability of the transmission device. Since the protective transmission device can achieve the reverse rotation of the output member 200 to avoid the output member 200 from being damaged, the transmission device provided by the present application also has the beneficial effect of protecting the transmission device.

[0082] In this embodiment, Figure 1 and Figure 2 As shown, the transmission device further includes a bearing 800, and one end of the screw rod 300 is connected to the frame through at least one bearing 800. The bearing 800 can play a role in supporting the screw rod 300.

[0083] In this embodiment, the bearing 800 has a bearing seat and a bearing body. The bearing seat is fixed on the frame, and the bearing body is nested in the bearing seat. One end of the screw rod 300 passes through the bearing body and fits tightly with the inner ring of the bearing body. This design not only ensures the stability of the screw rod 300 during rotation, but also reduces friction loss and improves transmission efficiency.

[0084] In addition, in order to ensure the durability and stability of the bearing 800, the bearing body in this embodiment is made of high-strength wear-resistant material, such as high-quality alloy steel. At the same time, the bearing seat is made of cast iron material with excellent vibration resistance to ensure that the bearing 800 can still maintain a stable working state under long-term and high-load working conditions.

[0085] In practical applications, in order to further improve the running stability and accuracy of the transmission equipment, a lubrication device may be provided at the bearing 800 to regularly add lubricating oil to the bearing body to reduce friction and wear and extend the service life of the bearing 800.

[0086] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A protective transmission device, characterized in that: include: Input parts; Output The end surface of the output member has a groove; A screw rod, one end of which is connected to the input member; the other end of which passes through the output member, and the screw rod is connected to the output member; as well as A sliding assembly, the sliding assembly comprising a nut, a slider and a connecting rod; the nut is threadedly connected to the lead screw; the slider is in the groove and slidably connected to the output member; one end of the connecting rod is hinged to the nut, and the other end of the connecting rod is hinged to the slider; The slider is capable of sliding in the radial direction of the output member, and when the nut is located at the limit position, the slider abuts against the side wall of the groove.

2. The protective transmission device according to claim 1, characterized in that: The output member is an output gear, a center hole is provided in the middle of the output gear, and the screw rod passes through the center hole and is frictionally connected with the output gear.

3. The protective transmission device according to claim 1, characterized in that: The sliding assembly also includes a mounting block, which is arranged in the groove. A sliding groove is provided on the mounting block, and the sliding block is slidably connected with the mounting block in the sliding groove.

4. The protective transmission device according to claim 3, characterized in that: The side wall of the slide groove is provided with a recessed guide groove; the side wall of the slide block is provided with a raised guide rail, and the guide rail is slidably connected with the guide groove.

5. The protective transmission device according to claim 1, characterized in that: The sliding assembly also includes a first pin shaft, a first connecting hole is provided on the nut, a first matching hole is provided at one end of the connecting rod, and the first pin shaft passes through the first connecting hole and the first matching hole to be connected to the nut and the connecting rod respectively.

6. The protective transmission device according to claim 5, characterized in that: The sliding assembly also includes a second pin shaft, a second connecting hole is provided on the slider, a second matching hole is provided at the other end of the connecting rod, and the second pin shaft passes through the second connecting hole and the second matching hole to be connected to the slider and the connecting rod respectively.

7. The protective transmission device according to claim 3, characterized in that: There are a plurality of slide grooves, and the plurality of slide grooves are distributed in a circular array; There are a plurality of the sliding blocks, a plurality of the connecting rods, and the sliding blocks, the connecting rods and the sliding grooves are arranged in a one-to-one correspondence.

8. The protective transmission device according to any one of claims 1 to 7, characterized in that: The grooves are arranged on both sides of the output member; the sliding components are arranged in two groups, and the two groups of sliding components are respectively located on both sides of the output member.

9. The protective transmission device according to claim 8, characterized in that: The screw rods on both sides of the output member have the same or opposite rotation directions.

10. A transmission device, characterized in that: It comprises a frame and a protective transmission device as described in any one of claims 1 to 9, wherein both ends of the screw rod are respectively rotatably connected to the frame.

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