Flexible clamping rope friction energy absorber for inclined shaft sliding-down car protection

Abstract

The utility model discloses a flexible clamping rope friction energy absorber for inclined shaft sliding-down protection. The flexible clamping rope friction energy absorber comprises a main steel wire rope, a lower clamping plate, an upper clamping plate, a floating pressing unit, a plurality of gradient pressing devices, a rope-driven rotating device and a machine shell. The rope-driven rotating device comprises a gear shaft only capable of rotating, a rope storage disc wheel fixed to the top end of the gear shaft, and a thin steel wire rope fixedly connected to the rope storage disc wheel and stored around the rope storage disc wheel, and the other end of the thin steel wire rope is fixedly connected with the main steel wire rope; the gradually-changing pressing device comprises a double-thread shaft and a large gear which is coaxially connected to the double-thread shaft in series and meshed with the gear shaft, and the large gear is coaxially matched with a guide section of the double-thread shaft in a sliding mode and transmits torque. When the sports car is braked, the main steel wire rope is pulled and drives the thin steel wire rope to move so as to drive the gear shaft to rotate, then all the large gears are synchronously driven to enable all the double-thread shafts to rotate and axially move, and then the overall pressing plate is synchronously driven to slowly and downwards press the spring. Therefore, the friction braking force of the main steel wire rope is slowly increased.

Description

Technical Field

[0001] The invention belongs to the technical field of mine equipment, relates to the technical field of anti-runaway device and energy absorber in mine transportation, and specifically relates to a flexible rope clamping friction energy absorber for protecting against runaway in inclined shafts. Background Art

[0002] Inclined shaft transportation is one of the important modes of mine transportation and plays an important role in mine production. Safe and efficient inclined shaft transportation is of great significance to the safe production of coal mines. Accidents caused by cars running away during inclined shaft transportation are accidents that require important attention in the safe transportation of coal mine production, and they must be effectively prevented. Most mines now use protective devices, that is, the inclined shaft cars are braked by the car barrier and the energy absorber to avoid serious accidents caused by cars running away during inclined shaft transportation.

[0003] The existing anti-runaway device for mine cars in inclined mine tunnels is mainly a friction energy absorber with a wire rope clamp structure. It mainly uses the clamping force of the steel plate on the wire rope to generate friction, absorb energy to achieve the braking effect, and the size of the friction force is adjusted by the clamping force of the bolt. In application, there are problems such as the wire rope is easily broken if it is too tight, and the wire rope is easily pulled out if it is too loose. Moreover, the bolt preload is pre-set during installation and cannot be changed during the braking process, resulting in a large impact force during the initial blocking, which seriously affects the braking safety of the transportation equipment and its drivers and passengers. The prior art (application number CN 201910747475.X) invented an initial pre-buffer clamp type energy absorber and its energy absorption method, which can achieve buffer braking within a very short distance to a certain extent, but cannot adapt to the long-distance flexible runaway protection application of inclined shaft transportation equipment with large mass, high kinetic energy and large slope (such as monorail crane). Recently, the inventor applied for a patent (application number CN202421720964.9) to invent a gradual positive pressure type rope clamp friction energy absorber, which realizes long-distance flexible buffer energy absorption braking through a number of gradual clamping devices driven by independent thin steel wire ropes. However, in actual operation, there are inevitable problems such as machining errors, transmission errors, installation errors and uneven force on the thin steel wires, which may make it difficult for each gradual clamping device to ensure synchronous clamping springs to provide uniform friction positive pressure. In addition, multiple pulleys will cause the energy absorber to have a larger spatial size, which is not convenient for installation and application in inclined shafts with confined spaces. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a flexible rope clamp friction energy absorber for protecting inclined shaft sports cars. It drives a double threaded shaft to synchronously and slowly tighten each spring through gear transmission to provide uniform friction positive pressure. It has the advantage of long-distance mechanical autonomous buffering flexible braking and effectively ensures the human / machine safety of sports car braking.

[0005] The technical solution adopted by the present invention is: a flexible rope-gripping friction energy absorber for protecting a sports car in an inclined shaft, comprising a lower clamping plate and an upper clamping plate provided with a plurality of parallel arc grooves and aligned and matched, a main steel wire rope clamped in each arc groove, and a floating clamping unit applying a clamping force to the upper clamping plate; the lower clamping plate is vertically fixed with a plurality of guide posts on the side plane of the arc groove, and a plurality of upper clamping plates are placed parallel to the upper part of the lower clamping plate after passing through the guide posts through through holes; the floating clamping unit comprises a spring coaxially strung on each guide post and in contact with the upper clamping plate, an integral pressure plate passing through the guide posts through a plurality of through holes and simultaneously pressing on the other end of each spring, and a pressure plate fixed to each guide post. The preload nut is used to limit the position of the integral pressure plate to generate the initial preload of the spring; it also includes a plurality of gradual compression devices that drive the integral pressure plate to move slowly to compress the spring, a rope-driven rotating device that drives the gradual compression device to move, and a casing fixed to the lower clamping plate and covered on the side of the integral pressure plate; the rope-driven rotating device includes a gear shaft that is only rotatable and provided with a small gear and is located on the central axis of the integral pressure plate, a rope storage disc wheel that is fixed to the upper top of the gear shaft extending out of the casing and transmits torque, a thin steel wire rope that is fixed to the rope storage disc wheel at one end and stored around it and is fixed to the main steel wire rope at the other end after passing through a guide roller; the gradual compression device includes a through A double-threaded shaft passing through the casing to the lower clamping plate, a large gear coaxially connected to the double-threaded shaft and a positioning sleeve, the double-threaded shaft is provided with a guide section, an external thread A and an external thread B in sequence along the axial direction; the lower clamping plate is provided with a plurality of through threaded holes B, the integral pressure plate and the threaded hole B are coaxially fixed with a threaded sleeve with a through threaded hole A, the external thread A and the external thread B of the double-threaded shaft are threadedly matched with the threaded hole A and the threaded hole B respectively; the large gear is meshed with the pinion of the gear shaft, the large gear is coaxially matched with the guide section of the double-threaded shaft and transmits torque, and the two can slide relative to each other axially; the casing There are two partitions parallel to the overall pressure plate, and the large gear is restricted to rotate between the two partitions by a positioning sleeve; the gradual clamping device is evenly arranged along the circumference of the gear shaft, and the lower clamp is fixed to the tunnel foundation by a number of bolts. The rotation direction of the external thread B is the same as that of the external thread A, and the pitch of the former is slightly larger than that of the latter. When the sports car brakes, the main steel wire rope is pulled and drives the thin steel wire rope to move to drive the gear shaft to rotate, and then synchronously drives the large gears to rotate and move the double-threaded shafts axially, and then synchronously drives the overall pressure plate to slowly slide downward to compress the spring, thereby slowly increasing the friction braking force of the main steel wire rope.

[0006] In the flexible rope clamp friction energy absorber for protecting inclined shaft running cars, the gear shaft passes through the casing to the lower clamp plate, the lower end of the gear shaft cooperates with the cylindrical hole of the lower clamp plate with a sliding bearing, and the protruding end of the gear shaft is fixed with a limiting nut B; a supporting sleeve coaxially cooperating with the gear shaft with a sliding bearing is fixed on the top of the casing, the rope storage disc wheel is connected to the gear shaft to transmit torque through a key or a special-shaped surface, and the rope storage disc wheel is close to the upper top surface of the supporting sleeve, and a limiting nut A is fixed on the upper end of the gear shaft to perform axial positioning of the gear shaft and its rope storage disc.

[0007] Preferably, in the flexible rope clamp friction energy absorber for protecting the inclined shaft sports car, the number of the upper clamps is 2, and the number of the main steel ropes is four; the number of the gradual clamping devices is 4, and the large gears in each gradual clamping device are staggered along the axial direction to avoid interference.

[0008] In the flexible rope clamp friction energy absorber for protecting the inclined shaft running car, the guide section of the double-threaded shaft is a structure with several guide grooves arranged in the circumference of the cylinder, and the shaft hole of the large gear matching with the guide section is provided with several guide protrusions that slide with the guide grooves; or the large gear and the guide section of the double-threaded shaft adopt a spline connection structure; the cylindrical surface of the guide section of the double-threaded shaft is slidingly supported with the cylindrical hole of the casing.

[0009] Preferably, in the flexible rope-clamping friction energy absorber for protecting inclined shaft running cars, the total length of the main steel wire rope is less than or equal to the length of the thin steel wire rope; a limiting nut C is fixed on the thread C provided on the upper top of the double-threaded shaft, and the length of the stepped groove with a smaller radius formed by the limiting nut C and the upper end of the guide section of the double-threaded shaft is slightly larger than the height of the large gear. When the energy absorber works in a safe locking state when the spring is pressed into place, the large gear is located in the stepped groove and cannot transmit torque to the double-threaded shaft.

[0010] Preferably, in the flexible rope clamp friction energy absorber for protecting the inclined shaft sports car, the total length of the main steel wire rope is greater than the total length of the thin steel wire rope, and the allowable breaking force of the connection joint where the thin steel wire rope is fixed to the main steel wire rope is smaller than the allowable breaking force of the thin steel wire rope.

[0011] In the flexible rope clamp friction energy absorber for protecting inclined shaft sports cars, the radius of the arc grooves of the lower clamp and the upper clamp is slightly larger than the radius of the main steel wire rope, and the size of each arc groove is less than or equal to a semicircle; the spring can be a combined disc spring or a cylindrical spring.

[0012] Preferably, in the flexible rope clamp friction energy absorber for protecting the sports car in the inclined shaft, sealing plates are fixed on both ends of the casing to allow only the main steel wire rope to pass.

[0013] Preferably, when the energy absorbers are connected in series for sports car protection, the energy absorbers on a single side of the lane share the same main steel wire rope, the thin steel wire rope of each energy absorber is fixedly connected to the main steel wire rope together with the front end of the thin steel wire rope of the first energy absorber close to the vehicle-blocking device, and the initial distance between the integral pressure plate and the lower clamping plate in each energy absorber is adjusted, so as to achieve mechanical delayed intervention braking of each energy absorber during the braking process of the sports car.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention has a simple structure and is a purely mechanical friction energy absorber, which has significant advantages such as low manufacturing and operation and maintenance costs; (2) Because the external thread B of the double-threaded shaft has the same rotation direction as the external thread A and the pitch of the former is slightly larger than that of the latter, when the sports car brakes, the main steel wire rope is pulled and drives the thin steel wire rope to drive the gear shaft to rotate, and then synchronously drives the large gears to rotate and axially move the double-threaded shafts, and then synchronously drives the overall pressure plate to slowly slide downward to compress the spring, thereby slowly increasing the friction braking force of the main steel wire rope and solving the problem of synchronous compression. (3) Combining the deceleration torque-increasing transmission of large and small gears and the differential thread transmission can further enhance the compression force and long-distance buffer compression, and the structure is more compact under the same compression force. (4) The energy absorber only needs one rope storage disc wheel, and the rope winding radius can be appropriately increased to reduce its number of rotations, thereby reducing the spatial dimensions of the double-threaded shaft in the whole machine. (5) All rotating parts such as the rope storage disc wheel and the large gear are axially positioned to avoid the instability of both rotation and axial movement and enhance functional reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an axonometric view of the flexible rope clamp friction energy absorber for protecting inclined shaft sports cars of the present invention.

[0016] Figure 2 for Figure 1 Axonometric view after hiding the cover.

[0017] Figure 3 for Figure 1 Axonometric view with the housing and cover hidden.

[0018] Figure 4 It is a top view of the flexible rope clamp friction energy absorber for protecting inclined shaft sports cars of the present invention.

[0019] Figure 5 for Figure 4 Middle AA section view.

[0020] Figure 6 for Figure 4 Left view of .

[0021] Figure 7 A top view of the hidden casing and the energy absorber behind the rope storage drum.

[0022] Figure 8 This is the isometric view of the double-threaded shaft in the rope-gripping friction energy absorber.

[0023] In the figure, 1-main steel wire rope; 2-lower clamping plate; 201-guide column; 202-pre-stressing nut; 3-upper clamping plate; 4-floating clamping unit; 401-integral clamping plate; 402-threaded sleeve; 403-spring; 5-rope drive rotating device; 501-rope storage disc wheel; 502-limiting nut A; 503-support sleeve; 504-gear shaft; 505-limiting nut B; 506-fine steel wire rope; 507-guide roller; 6-gradual clamping device; 601-double thread shaft; 6011-thread C; 6012-step groove; 6013-guide section; 6014-external thread A; 6015-external thread B; 602-large gear; 603-positioning sleeve; 604-limiting nut C; 7-casing; 8-sealing plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They 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 cannot be understood as a limitation on the present invention.

[0027] like Figure 1-Figure 6As shown, a flexible rope-gripping friction energy absorber for protecting a sports car in an inclined shaft comprises a lower clamping plate 2 and an upper clamping plate 3 provided with a plurality of parallel circular arc grooves and aligned with each other, a main steel wire rope 1 clamped in each circular arc groove, and a floating clamping unit 4 applying a clamping force to the upper clamping plate 3; the lower clamping plate 2 is vertically fixed with a plurality of guide posts 201 on the side plane of the circular arc groove, and a plurality of upper clamping plates 3 are placed parallel to the upper side of the lower clamping plate 2 after passing through the guide posts 201 through through holes; the floating clamping unit 4 comprises a spring 403 coaxially strung on each guide post 201 and in contact with the upper clamping plate 3, an integral pressure plate 401 passing through the guide posts 201 through a plurality of through holes and simultaneously pressing on the other end surface of each spring 403, and a pre-compression nut 202 fixed to each guide post 201 and limiting the initial compression position of the integral pressure plate 401 to generate an initial pre-compression amount of the spring; and further comprises a synchronous drive for the integral pressure plate 401 to slow down the movement of the guide posts 201. A plurality of gradual pressing devices 6 that slowly move to compress the spring 403, a rope-driven rotating device 5 that drives the gradual pressing device 6 to move synchronously, and a housing 7 that is fixed to the lower clamping plate 2 and covers the side of the integral pressing plate 401; the rope-driven rotating device 5 includes a gear shaft 504 that is only rotatable and provided with a small gear and is located on the central axis of the integral pressing plate 401, a rope storage disc wheel 501 that is fixed to the upper top of the gear shaft 504 that extends out of the housing 7 and transmits torque, and a thin steel wire rope 506 that is fixed to the rope storage disc wheel 501 at one end and stored around it and is fixed to the main steel wire rope 1 at the other end after being changed in direction by a guide roller 507; the gradual pressing device 6 includes a double-threaded shaft 601 that passes through the housing 7 to the lower clamping plate 2, a large gear 602 and a positioning sleeve 603 that are coaxially connected to the double-threaded shaft 601, and the double-threaded shaft 601 is provided with a guide section 6013, an external thread A 6014 and external thread B 6015; the lower clamping plate 2 is provided with a plurality of through threaded holes B, the integral pressing plate 401 is coaxially fixed with a threaded sleeve 402 with a through threaded hole A, and the external thread A 6014 and external thread B 6015 of the double threaded shaft 601 are threadedly matched with the threaded hole A and the threaded hole B respectively; the large gear 602 is meshed with the small gear of the gear shaft 504, and the large gear 602 is coaxially matched with the guide section 6013 of the double threaded shaft 601 and transmits torque, and the two can slide relative to each other axially; the housing 7 is provided with two partitions parallel to the integral pressing plate 401, and the large gear 602 is restricted to rotate between the two partitions by the positioning sleeve 603; the gradual clamping device 6 is uniformly circumferentially along the gear shaft 504 Several of them are arranged, and the lower clamping plate 2 is fixed to the tunnel foundation by a number of bolts. The external thread B of the double-threaded shaft 601 has the same rotation direction as the external thread A and the pitch of the former is slightly larger than that of the latter. When the sports car brakes, the main steel wire rope 1 is pulled and drives the thin steel wire rope 506 to drive the gear shaft 504 to rotate, and then synchronously drives the large gears 602 to make the double-threaded shafts 601 rotate and move axially, and then synchronously drives the overall pressure plate 401 to slowly slide downward to compress the spring 403, thereby slowly increasing the friction braking force of the main steel wire rope 1.

[0028] like Figure 5-Figure 6 As shown, the gear shaft 504 passes through the housing 7 to the lower clamping plate 2, the lower end of the gear shaft 504 cooperates with the cylindrical hole of the lower clamping plate 2 with a sliding bearing, and the protruding end of the gear shaft 504 is fixed with a limiting nut B 505; the top of the housing 7 is fixed with a supporting sleeve 503 coaxially cooperating with the gear shaft 504 with a sliding bearing, the rope storage disc wheel 501 is connected to the gear shaft 504 through a key or a special-shaped surface to transmit torque, and the rope storage disc wheel 501 is close to the upper top surface of the supporting sleeve 503, and a limiting nut A 502 is fixed on the upper end of the gear shaft 504 to axially position the gear shaft 504 and its rope storage disc 501, so that the gear shaft can only rotate around the axis.

[0029] Preferably, if Figure 5 and Figure 7 As shown, the number of the upper clamping plates 3 is 2, and the number of the main steel wire ropes 1 is four; the number of the gradual clamping devices 6 is 4, and the large gears 602 in each gradual clamping device 6 are staggered along the axial direction to avoid interference, thereby allowing large gears with larger diameters to be used to achieve a larger reduction ratio to increase torque and slow down the spring clamping process.

[0030] like Figure 8 and Figure 5 As shown, the guide section 6013 of the double-threaded shaft 601 is a structure with several guide grooves arranged in the circumference of the cylinder, and the shaft hole of the large gear 602 cooperating with the guide section 6013 is provided with several guide protrusions slidably matched with the guide grooves; or the large gear 602 and the guide section of the double-threaded shaft 601 adopt a spline connection structure; the cylindrical surface of the guide section of the double-threaded shaft 601 is slidably supported and matched with the cylindrical hole of the housing 7 to realize the guiding and supporting function of the axial movement.

[0031] Preferably, if Figure 8 and Figure 5 As shown, the total length of the main steel wire rope 1 is less than or equal to the length of the thin steel wire rope 506; the upper top of the double-threaded shaft 601 is provided with a thread C 6011 on which a limiting nut C 604 is fixed, and the length of the stepped groove 6012 with a reduced radius formed by the limiting nut C 604 and the upper end of the guide section 6013 of the double-threaded shaft 601 is slightly larger than the height of the large gear 602. When the energy absorber works in a safe locking state in which the spring is tightened into place, the large gear 602 is located in the stepped groove 6012 and cannot transmit torque to the double-threaded shaft 601. At this time, the gear can still rotate but cannot transmit torque, the friction braking force of the energy absorber is in a maintained state, and the thin steel wire rope is not broken, that is, the thin steel wire rope is not broken when the maximum preset friction braking force is reached, thereby ensuring application safety.

[0032] Preferably, the total length of the main steel wire rope 1 is greater than the total length of the thin steel wire rope 506, and the allowable breaking force of the connection joint where the thin steel wire rope 506 is fixed to the main steel wire rope 1 is smaller than the allowable breaking force of the thin steel wire rope 506, so that the thin steel wire rope 506 remains on one side of the stationary energy absorber instead of moving with the vehicle arresting device, thereby ensuring safety.

[0033] Preferably, the radius of the arc groove of the lower clamping plate 2 and the upper clamping plate 3 is slightly larger than the radius of the main wire rope 1, and the size of each arc groove is less than or equal to a semicircle; the spring 403 can be a combined disc spring or a cylindrical spring.

[0034] like Figure 1 As shown, sealing plates 8 are fixed on both ends of the casing 7, which only allow the main wire rope 1 to pass through. In this way, the entire device is in a closed state, avoiding mechanical failures caused by the falling of dust and particles underground, and reducing maintenance costs and difficulties.

[0035] Preferably, when the energy absorbers are connected in series for sports car protection, the energy absorbers on a single side of the lane share the same main steel wire rope 1, and the thin steel wire ropes of each energy absorber are fixedly connected to the main steel wire rope together with the front end of the thin steel wire rope of the first energy absorber close to the vehicle-blocking device, and the initial distance between the integral pressure plate 401 and the lower clamping plate 2 in each energy absorber is adjusted to achieve mechanical delayed intervention braking of each energy absorber during the braking process of the sports car. This is a purely mechanical delayed intervention and does not require folding and dumping ropes, and has the significant advantages of high reliability and low maintenance cost.

Claims

1. A flexible rope-gripping friction energy absorber for protecting a sports car in an inclined shaft, comprising a lower clamping plate and an upper clamping plate provided with a plurality of parallel arc grooves and aligned with each other, a main steel wire rope clamped in each arc groove, and a floating clamping unit applying a clamping force to the upper clamping plate; the lower clamping plate is vertically fixed with a plurality of guide posts on the side plane of the arc groove, and a plurality of upper clamping plates are placed parallel to the upper part of the lower clamping plate after passing through the guide posts through through holes; the floating clamping unit comprises a spring coaxially strung on each guide post and in contact with the upper clamping plate, an integral pressure plate passing through the guide posts through a plurality of through holes and simultaneously pressing on the other end of each spring, and a preload nut fixed to each guide post and limiting the position of the integral pressure plate to generate an initial preload of the spring; it is characterized in that The invention also includes a plurality of gradual clamping devices for driving the integral pressure plate to move slowly to compress the spring, a rope-driven rotating device for driving the gradual clamping device to move, and a casing fixed to the lower clamping plate and covering the side of the integral pressure plate; the rope-driven rotating device includes a gear shaft located on the central axis of the integral pressure plate and only rotatable and provided with a small gear, a rope storage disc wheel fixed to the upper top end of the gear shaft extending out of the casing and transmitting torque, a thin steel wire rope fixedly connected to the rope storage disc wheel at one end and stored around it and fixedly connected to the main steel wire rope at the other end after passing through a guide roller; the gradual clamping device includes a double-threaded shaft running through the casing to the lower clamping plate, a large gear coaxially connected to the double-threaded shaft and a positioning sleeve, the double-threaded shaft is provided with a guide section, an external thread A and an external thread B in sequence along the axial direction; the lower clamping plate is provided with a plurality of threaded holes B through which the threaded hole B is coaxially fixed with a threaded sleeve with a threaded hole A through which the threaded hole A is through which the integral pressure plate is coaxially fixed with the threaded hole B, and the double-threaded The external thread A and the external thread B of the shaft are threadedly matched with the threaded hole A and the threaded hole B respectively; the large gear is meshed with the small gear of the gear shaft, and the large gear is coaxially matched with the guide section of the double-threaded shaft to transmit torque, and the two can slide axially relative to each other; the casing is provided with two partitions parallel to the integral pressure plate, and the large gear is restricted to rotate between the two partitions by a positioning sleeve; a number of the gradual clamping devices are evenly arranged along the circumference of the gear shaft, and the lower clamp is fixed to the tunnel foundation by a number of bolts. The external thread B has the same rotation direction as the external thread A and the former has a slightly larger pitch than the latter. When the sports car brakes, the main steel wire rope is pulled and drives the thin steel wire rope to move to drive the gear shaft to rotate, and then synchronously drives the large gears to rotate and move the double-threaded shafts axially, and then synchronously drives the integral pressure plate to slowly slide downward to compress the spring, thereby slowly increasing the friction braking force of the main steel wire rope.

2. The flexible rope-grip friction energy absorber for protecting a sports car in an inclined shaft according to claim 1 is characterized in that: The gear shaft passes through the casing to the lower clamping plate, the lower end of the gear shaft cooperates with the cylindrical hole of the lower clamping plate by a sliding bearing, and the protruding end of the gear shaft is fixed with a limiting nut B; a supporting sleeve coaxially cooperating with the sliding bearing of the gear shaft is fixed on the top of the casing, the rope storage disc wheel is connected to the gear shaft to transmit torque through a key or a special-shaped surface, and the rope storage disc wheel is close to the top end surface of the supporting sleeve, and a limiting nut A is fixed on the upper end of the gear shaft to perform axial positioning of the gear shaft and its rope storage disc.

3. The flexible rope-grip friction energy absorber for protecting a sports car in an inclined shaft according to claim 1 is characterized in that: The number of the upper clamping plates is 2, and the number of the main steel wire ropes is 4; the number of the gradual clamping devices is 4, and the large gears in each gradual clamping device are staggered along the axial direction to avoid interference.

4. The flexible rope-grip friction energy absorber for protecting a sports car in an inclined shaft according to claim 1 is characterized in that: The guide section of the double-threaded shaft is a structure with several guide grooves arranged in the circumference of the cylinder, and the shaft hole of the large gear matching the guide section is provided with several guide protrusions that slide in cooperation with the guide grooves; or the large gear and the guide section of the double-threaded shaft adopt a spline connection structure; the cylindrical surface of the guide section of the double-threaded shaft is slidingly supported in cooperation with the cylindrical hole of the casing.

5. The flexible rope-grip friction energy absorber for protecting a sports car in an inclined shaft according to claim 1 is characterized in that: The total length of the main steel wire rope must be less than or equal to the length of the thin steel wire rope; the upper top of the double-threaded shaft is provided with a thread C on which a limiting nut C is fixed, and the length of the stepped groove with a smaller radius formed by the limiting nut C and the upper end of the guide section of the double-threaded shaft is slightly larger than the height of the large gear. When the energy absorber works in a safe locking state when the spring is tightened into place, the large gear is located in the stepped groove and cannot transmit torque to the double-threaded shaft.

6. The flexible rope-grip friction energy absorber for protecting a sports car in an inclined shaft according to claim 1 is characterized in that: The total length of the main steel wire rope is greater than the total length of the thin steel wire rope, and the allowable breaking force of the connection joint where the thin steel wire rope is fixed to the main steel wire rope is smaller than the allowable breaking force of the thin steel wire rope.

7. The flexible rope-grip friction energy absorber for protecting a sports car in an inclined shaft according to claim 1 is characterized in that: The radius of the arc grooves of the lower clamping plate and the upper clamping plate is slightly larger than the radius of the main wire rope, and the size of each arc groove is smaller than or equal to a semicircle; the spring can be a combined disc spring or a cylindrical spring.

8. The flexible rope-grip friction energy absorber for protecting a sports car in an inclined shaft according to claim 1 is characterized in that: Sealing plates are fixed on both ends of the casing, allowing only the main steel wire rope to pass through.

9. The flexible rope-grip friction energy absorber for protecting a sports car in an inclined shaft according to claim 1 is characterized in that: When the energy absorbers are connected in series for sports car protection, the energy absorbers on one side of the lane share the same main steel wire rope, and the thin steel wire ropes of each energy absorber are fixedly connected to the main steel wire rope together with the front end of the thin steel wire rope of the first energy absorber close to the vehicle-blocking device, and the initial distance between the integral pressure plate and the lower clamping plate in each energy absorber is adjusted, so as to realize mechanical delayed intervention braking of each energy absorber during the braking process of the sports car.

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