Adjustable anti-stall self-locking parking device

Abstract

An adjusting groove which is concave forwards is formed in the middle of the rear surface of a main body plate, the left side face and the right side face of the adjusting groove are symmetrical arc-shaped side faces, and two symmetrical rope inlet channels which are communicated with an upper mounting groove are upwards formed in the adjusting groove. The adjusting groove is downwards provided with two symmetrical rope outlet channels communicated with the lower mounting groove, the adjusting groove is provided with two resistance friction plates capable of moving left and right, arc-shaped adjusting channels are formed between the two resistance friction plates and the left side face and the right side face of the adjusting groove respectively, and a back plate is fixed to the rear surface of the body plate. According to the utility model, two steel wire ropes are adopted, so that the strength is higher and the safety is better; all the components are made of 304 stainless steel materials, so that corrosion, rusting, aging and blocking are avoided, the service life is long, the reliability is good, and the safety is high; the descending and stopping can be controlled, the descending speed can be adjusted, self-locking speed reduction can be achieved when the descending speed is too high, and safety and reliability are good.

Description

Technical Field

[0001] This utility model relates to the field of fire escape equipment, and in particular to an adjustable anti-stall self-locking stop device. Background Technology

[0002] Most buildings today are high-rises, and escape is extremely difficult in the event of a fire. Therefore, escape descent devices for high-rise fires have emerged on the market. Currently, most escape descent devices on the market use gear structures such as rotational friction, rotational collision, and gear reduction ratios, relying on the user's weight to achieve descent. However, these devices have the following problems when in use:

[0003] 1. These descent devices all use only one steel wire rope, which is insufficient in terms of safety and reliability.

[0004] 2. These descent devices cannot be manually controlled or stopped during descent, posing a safety hazard.

[0005] 3. Over time, the friction plates of these decelerators are prone to oxidation and failure. It cannot be guaranteed that they will not be oxidized during the 10, 20 or even 30 years of storage, which reduces the effectiveness of the friction plates and causes people escaping from fire to lose their escape guarantee.

[0006] 4. Over time, the rotating structure of these descent devices is prone to rust. It cannot be guaranteed that they will not become stuck due to rust during the 10, 20 or even 30 years of placement, causing the steel wire rope to slip and resulting in a rapid descent, which would deprive fire escapers of their escape guarantee.

[0007] 5. The materials used in these descent devices have low corrosion resistance and are prone to rusting. They cannot be guaranteed to remain functional for 10, 20, or even 30 years, leaving fire escapees without any safety guarantee. Utility Model Content

[0008] This invention proposes an adjustable anti-stall self-locking descent device, which solves the problem of insufficient reliability of existing descent devices.

[0009] The technical solution of this utility model is implemented as follows:

[0010] An adjustable anti-stall self-locking stop device includes a main plate. The upper and lower parts of the rear surface of the main plate are respectively provided with an upper mounting groove and a lower mounting groove that are concave forward. The middle of the rear surface of the main plate is provided with a forward-concave adjustment groove. The left and right sides of the adjustment groove are symmetrical arc-shaped sides. The adjustment groove has two symmetrical rope inlet channels leading to the upper mounting groove and two symmetrical rope outlet channels leading to the lower mounting groove. The adjustment groove is provided with two left-right movable resistance friction plates, which form arc-shaped adjustment channels with the left and right sides of the adjustment groove, respectively. A back plate covering the adjustment groove is fixed to the rear surface of the main plate. An adjustment hole leading to the rear surface of the back plate is provided on the front surface of the main plate. The adjustment hole passes through the middle of the adjustment groove, and a corresponding nut is fixed to the front end of the adjustment hole.

[0011] It also includes a manual adjustment device, which includes a threaded rod that is threaded into a nut. The front end of the threaded rod is fixed with a hand-rotating device for easy rotation of the threaded rod. A tapered rod is fixed to the rear end of the threaded rod. The rear end of the tapered rod is smaller than the front end. The tapered rod is located in an adjustment hole and is clamped between two resistance friction plates. The tapered rod is used to push the two resistance friction plates to move to the left and right sides. The rear end of the tapered rod is connected to a limiting device for forward movement.

[0012] Two symmetrical lower shaft seats are fixed on the left and right sides of the lower mounting groove. A horizontal first adjusting shaft is passed through between the lower shaft seats. A first inclined slide groove is opened in the middle of the two lower shaft seats to cooperate with the first adjusting shaft to move up and down. The upper end and lower end of the first inclined slide groove are the first low hole end and the first high hole end, respectively. The first low hole end is closer to the front surface of the lower mounting groove than the first high hole end. The two sides of the first inclined slide groove penetrate the left and right sides of the lower shaft seats. The two ends of the first adjusting shaft are connected to a first limiting device to prevent the first adjusting shaft from disengaging from the first inclined slide groove.

[0013] A control block is sleeved on the middle of the first adjusting shaft. Two adjusting round sleeves are also sleeved on the outside of the first adjusting shaft, located on both sides of the control block. The two adjusting round sleeves are located between the two lower shaft seats. A lower rope passage is formed between the adjusting round sleeves and the main body plate. A spring for pushing the control block upward is provided between the front surface of the control block and the front surface of the lower mounting groove. A spring groove for cooperating with the spring is opened on the front surface of the control block and the front surface of the lower mounting groove. A second limiting device for limiting the control block to move backward away from the main body plate is also provided on the control block or the main body plate. A hand pull device for conveniently pulling the control block downward is connected to the lower end of the control block.

[0014] Two symmetrical upper shaft seats are fixed on the left and right sides of the upper mounting groove. A horizontal second adjusting shaft is passed through between the upper shaft seats. A second inclined slide groove is opened in the middle of the two upper shaft seats to cooperate with the second adjusting shaft to move up and down. The upper end and lower end of the second inclined slide groove are the second low hole end and the second high hole end, respectively. The second low hole end is closer to the front surface of the upper mounting groove than the second high hole end. The two sides of the second inclined slide groove penetrate the left and right sides of the upper shaft seats. The two ends of the second adjusting shaft are connected to a third limiting device to prevent the second adjusting shaft from disengaging from the second inclined slide groove.

[0015] The second adjusting shaft is fitted with a self-locking round sleeve, which is located between the two upper shaft seats. An upper rope passage is formed between the self-locking round sleeve and the main body plate.

[0016] It also includes two steel wire ropes, which pass through the upper rope passage, the rope inlet passage, the arc-shaped adjustment passage, the rope outlet passage, and the lower rope passage in sequence.

[0017] Preferably, both the main body plate and the back plate are rectangular plates, and the back plate is bolted to the main body plate; the lower shaft seat and the upper shaft seat are integrally formed with the main body plate; the lower end and both sides of the lower mounting groove extend to the edge of the main body plate, and the upper end and both sides of the upper mounting groove extend to the edge of the main body plate; the main body plate, back plate, friction plate, manual adjustment device, lower shaft seat, upper shaft seat, first adjustment shaft, second adjustment shaft, control block, adjusting sleeve, self-locking sleeve, spring and hand-operated device are all made of 304 stainless steel.

[0018] Preferably, both the rope inlet channel and the rope outlet channel are arc-shaped or straight channels; the adjustment hole is a round hole or a threaded hole.

[0019] Preferably, the portion between the two rope inlet channels is a rope inlet partition, and the portion between the two rope outlet channels is a rope outlet partition. A guide groove is formed between the rope inlet partition and the rope outlet partition to guide the resistance friction plate to move left and right.

[0020] Preferably, the side of the friction plate near the adjustment groove is an arc-shaped surface, and a rope groove that is concave inward and cooperates with the wire rope is formed on the arc-shaped surface. The side of the friction plate away from the adjustment groove is an arc-shaped groove surface, and the arc-shaped groove surface contacts the conical surface of the cone rod.

[0021] Preferably, the spring grooves on the front surface of the control block and the front surface of the lower mounting groove are both centrally symmetrical triangular grooves.

[0022] Preferably, the limiting device includes a cylindrical section fixed coaxially to the rear end of the tapered rod, the cylindrical section having a radial pin hole, a flat washer sleeved on the cylindrical section, and a cotter pin inserted into the pin hole to prevent the flat washer from dislodging from the cylindrical section; or the limiting device is a limiting rod or limiting disc vertically fixed to the rear end of the tapered rod.

[0023] Preferably, the first limiting device includes an end fixed to one end of the first adjusting shaft, the diameter of which is larger than that of the first adjusting shaft, and a radial first pin hole is provided at the other end of the first adjusting shaft, into which a first cotter pin is inserted; the third limiting device includes a third flat washer fitted around both ends of the second adjusting shaft, both ends of the second adjusting shaft having radial third pin holes, into which a third cotter pin is inserted, and the third cotter pin being further away from the upper shaft seat than the third flat washer.

[0024] Preferably, the second limiting device includes an L-shaped plate, which is fixed to the front surface of the control block. The L-shaped plate and the control block form an upward-opening limiting groove, and the lower end of the main body is located in the limiting groove. The pull device is a pull ring or an inverted T-shaped pull rod. The hand-rotating device is a butterfly handle or a handwheel.

[0025] Preferably, the lower part of the main body plate has a seat belt hanging hole.

[0026] The beneficial effects of this utility model are:

[0027] 1. This utility model uses two steel wire ropes, resulting in higher strength and better safety. 2. This utility model is entirely made of 304 stainless steel, ensuring it will not corrode, rust, age, or jam even after prolonged storage. It has a long service life, guaranteeing safe use even after 10, 20, or even 30 years, demonstrating high reliability and safety. 3. This utility model has a simple structure with highly reliable components. It avoids traditional, unreliable structures such as gears, allowing for long-term storage, a long service life, and high reliability and safety. 4. This utility model allows for manual adjustment of the descent speed by rotating a manual adjustment device, which moves the resistance friction plate horizontally and adjusts the tension of the steel wire rope clamped in the arc-shaped adjustment channel. 5. When the hand-pulling device of this utility model is pulled down, it drives the control block, the first adjusting shaft and the adjusting sleeve to move downward along the first inclined slide groove. Because the first low hole end is closer to the front surface of the lower mounting groove than the first high hole end, the adjusting sleeve moves away from the wire rope, that is, the wire rope is loosened and the device descends. When you want to stop, release the hand-pulling device, and the control block moves upward under the action of the spring, which drives the first adjusting shaft and the adjusting sleeve to move upward. The adjusting sleeve moves closer to the wire rope and presses the wire rope, and the device stops descending, thus achieving the purpose of manual control. 6. When the device of this utility model descends at a normal speed, the second adjusting shaft, under the action of its own weight and the weight of the self-locking sleeve, is at the second high hole end at the lower end. The self-locking sleeve is in contact with the wire rope and only rotates under the friction of the wire rope, without playing a role. When there is a fire, people are nervous and the device descends too fast. The wire rope not only drives the self-locking sleeve to rotate, but also drives the self-locking sleeve and the second adjusting shaft to move upward along the second inclined slide. The self-locking sleeve gets close to the wire rope and presses the wire rope, achieving the function of self-locking and preventing stalling, thus ensuring safety. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0031] Figure 3 This is a schematic diagram of the left-side structure of this utility model;

[0032] Figure 4 for Figure 2A schematic diagram of the structure after removing the back panel;

[0033] Figure 5 This is a schematic diagram of the manual adjustment device in this utility model;

[0034] Figure 6 This is a schematic diagram of the left side structure of the main body plate in this utility model;

[0035] Figure 7 This is a rear view structural diagram of the main body plate in this utility model;

[0036] Figure 8 This is a schematic diagram of the resistance friction plate in this utility model;

[0037] Figure 9 This is a schematic diagram of the control block in this utility model.

[0038] In the picture:

[0039] Main plate 1, upper mounting groove 11, lower mounting groove 12, adjustment groove 13, arc-shaped side 131, guide slide 132, rope inlet channel 14, rope outlet channel 15, arc-shaped adjustment channel 16, adjustment hole 17, nut 18, rope inlet partition 19, rope outlet partition 10.

[0040] Resistance friction plate 2, arc-shaped surface 21, arc-shaped groove surface 22, rope groove 23;

[0041] Back plate 3, bolt 31;

[0042] Manual adjustment device 4, threaded rod 41, hand-turning device 42, tapered rod 43, limiting device 44, cylindrical section 441, flat washer 442, cotter pin 443;

[0043] Lower shaft seat 51, first adjusting shaft 52, first inclined slide groove 53, first low hole end 531, first high hole end 532, first limiting device 54, end 541, first cotter pin 542, control block 55, L-shaped plate 551, limiting groove 552, adjusting round sleeve 56, spring 57, spring groove 58, hand pull device 59;

[0044] Upper shaft seat 61, second adjusting shaft 62, second inclined slide 63, second low hole end 631, second high hole end 632, self-locking round sleeve 64, third limiting device 65, third flat washer 651, third cotter pin 652.

[0045] 7. Steel wire rope;

[0046] Seat belt attachment hole 8. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] Reference Figure 1-9 An adjustable anti-stall self-locking stop device includes a main plate 1. The upper and lower parts of the rear surface of the main plate 1 are respectively provided with an upper mounting groove 11 and a lower mounting groove 12 that are concave forward. The middle part of the rear surface of the main plate 1 is provided with an adjustment groove 13 that is concave forward. The left and right sides of the adjustment groove 13 are symmetrical arc-shaped sides 131. The adjustment groove 13 has two symmetrical rope inlet channels 14 leading to the upper mounting groove and two symmetrical rope outlet channels 15 leading to the lower mounting groove 12. The adjustment groove 13 is provided with two resistance friction plates 2 that can move left and right. The two resistance friction plates 2 form arc-shaped adjustment channels 16 with the left and right sides of the adjustment groove 13, respectively. The rear surface of the main plate 1 is fixed with a back plate 3 that covers the adjustment groove. The front surface of the main plate 1 is provided with an adjustment hole 17 leading to the rear surface of the back plate. The adjustment hole 17 passes through the middle of the adjustment groove 13, and the front end of the adjustment hole 17 is fixed with a corresponding nut 18.

[0049] It also includes a manual adjustment device 4, which includes a threaded rod 41 that is threaded into a nut 18. The front end of the threaded rod 41 is fixed with a hand-rotating device 42 for easy rotation of the threaded rod 41. The rear end of the threaded rod 41 is fixed with a tapered rod 43 that is smaller than the front end. The tapered rod 43 is located in an adjustment hole 17 and is sandwiched between two resistance friction plates 2. The tapered rod 43 is used to push the two resistance friction plates 2 to move to the left and right. The rear end of the tapered rod 43 is connected to a limiting device 44 for forward movement limitation.

[0050] Two symmetrical lower shaft seats 51 are fixed on the left and right sides of the lower mounting groove 12. A horizontal first adjusting shaft 52 is passed through the lower shaft seats 51. A first inclined slide groove 53 is opened in the middle of the two lower shaft seats 51 to cooperate with the first adjusting shaft 52 to move up and down. The upper end and lower end of the first inclined slide groove 53 are the first low hole end 531 and the first high hole end 532, respectively. The first low hole end 531 is closer to the front surface of the lower mounting groove 12 than the first high hole end 532. The two sides of the first inclined slide groove 53 penetrate the left and right sides of the lower shaft seat 51. The two ends of the first adjusting shaft 52 are connected to a first limiting device 54 to restrict the first adjusting shaft 52 from disengaging from the first inclined slide groove 53.

[0051] A control block 55 is sleeved on the middle of the first adjusting shaft 52. Two adjusting round sleeves 56 located on both sides of the control block are also sleeved on the outside of the first adjusting shaft 52. The two adjusting round sleeves 56 are located between the two lower shaft seats 51. A lower rope passage is formed between the adjusting round sleeves 56 and the main body plate 1. A spring 57 for pushing the control block upward is provided between the front surface of the control block 55 and the front surface of the lower mounting groove 12. A spring groove 58 for cooperating with the spring is opened on the front surface of the control block 55 and the front surface of the lower mounting groove 12. A second limiting device for limiting the control block 55 from moving away from the main body plate 1 is also provided on the control block 55 or the main body plate 1. A hand pull device 59 for facilitating the downward pulling of the control block 55 is connected to the lower end of the control block 55.

[0052] Two symmetrical upper shaft seats 61 are fixed on the left and right sides of the upper mounting groove 11. A horizontal second adjusting shaft 62 is passed through the upper shaft seats 61. A second inclined slide groove 63 is opened in the middle of the two upper shaft seats 61 to cooperate with the second adjusting shaft 62 to move up and down. The upper end and lower end of the second inclined slide groove 63 are the second low hole end 631 and the second high hole end 632, respectively. The second low hole end 631 is closer to the front surface of the upper mounting groove 11 than the second high hole end 632. The two sides of the second inclined slide groove 63 penetrate the left and right sides of the upper shaft seats. The two ends of the second adjusting shaft 62 are connected to a third limiting device 65 to restrict the second adjusting shaft 62 from disengaging from the second inclined slide groove 63.

[0053] The second adjusting shaft 62 is fitted with a self-locking round sleeve 64, which is located between the two upper shaft seats 61. An upper rope passage is formed between the self-locking round sleeve 64 and the main body plate 1.

[0054] It also includes two steel wire ropes 7, which pass through the upper rope passage, the rope inlet passage 14, the arc-shaped adjustment passage 16, the rope outlet passage 15 and the lower rope passage in sequence.

[0055] The upper ends of the two steel wire ropes 7 are fixed to the building. The upper ends of the two steel wire ropes 7 can also be connected together, or a steel wire rope 7 can be folded in half to form two ropes.

[0056] The outer circumferential surfaces of the adjusting sleeve 56 and the self-locking sleeve 64 are frosted, not smooth, to ensure that there is a certain amount of friction when in contact with the wire rope.

[0057] In a preferred embodiment, both the main body plate 1 and the back plate 3 are rectangular plates, and the back plate 3 is connected to the main body plate 1 by bolts 31; the lower shaft seat 51 and the upper shaft seat 61 are integrally formed with the main body plate 1; the lower end and both sides of the lower mounting groove 12 extend to the edge of the main body plate 1, and the upper end and both sides of the upper mounting groove 11 extend to the edge of the main body plate 1; the main body plate 1, the back plate 3, the resistance friction plate 2, the manual adjustment device 4, the lower shaft seat 51, the upper shaft seat 61, the first adjustment shaft 52, the second adjustment shaft 62, the control block 55, the adjusting round sleeve 56, the self-locking round sleeve 64, the spring 57, and the hand-pulled device 59 are all made of 304 stainless steel.

[0058] In a preferred embodiment, both the rope inlet channel 14 and the rope outlet channel 15 are arc-shaped or straight channels; the adjustment hole 17 is a round hole or a threaded hole.

[0059] As a preferred embodiment, the portion between the two rope inlet channels 14 is a rope inlet partition 19, and the portion between the two rope outlet channels 15 is a rope outlet partition 10. A guide groove 132 is formed between the rope inlet partition 19 and the rope outlet partition 10 to guide the resistance friction plate 2 to move left and right.

[0060] In a preferred embodiment, the side of the resistance friction plate 2 closest to the adjusting groove 13 is an arc-shaped surface 21, with an inwardly recessed groove that engages with the wire rope. The side of the resistance friction plate 2 furthest from the adjusting groove is an arc-shaped groove surface 22, which contacts the conical surface of the cone rod 43. The left and right sides of the adjusting groove 13 are symmetrical arc-shaped sides 131, forming a symmetrical physical curve. Together with the resistance friction plate 2, they form an arc-shaped adjusting channel 16. By adjusting the left and right movement of the resistance friction plate 2, the tension of the wire rope can be adjusted, thereby regulating the descent speed of the device. This physical method ensures reliability and prevents failure. The rope groove increases the contact area with the wire rope, increasing friction and reliability.

[0061] In a preferred embodiment, the spring grooves 58 on the front surface of the control block 55 and the front surface of the lower mounting groove are both centrally symmetrical triangular grooves.

[0062] In a preferred embodiment, the limiting device 44 includes a cylindrical section 441 coaxially fixed to the rear end of the tapered rod 43. The cylindrical section 441 has a radial pin hole, and a flat washer 442 is sleeved on the cylindrical section. A cotter pin 443 is inserted into the pin hole to prevent the flat washer 442 from dislodging from the cylindrical section. Alternatively, the limiting device 44 is a limiting rod or a limiting circular plate vertically fixed to the rear end of the tapered rod 43.

[0063] In a preferred embodiment, the first limiting device 54 includes an end head 541 fixed to one end of the first adjusting shaft 52, the diameter of the end head 541 being larger than that of the first adjusting shaft 52, and a radial first pin hole being provided at the other end of the first adjusting shaft 52, into which a first cotter pin 542 is inserted; the third limiting device 65 includes a third flat washer 651 sleeved around both ends of the second adjusting shaft 62, and both ends of the second adjusting shaft 62 having radial third pin holes, into which a third cotter pin 652 is inserted, the third cotter pin 652 being further away from the upper shaft seat 61 than the third flat washer 651.

[0064] In a preferred embodiment, the second limiting device includes an L-shaped plate 551, which is fixed to the front surface of the control block 55. The L-shaped plate 551 and the control block 55 form an upward-opening limiting groove 552, and the lower end of the main body 1 is located in the limiting groove 552. The pull device 59 is a pull ring or an inverted T-shaped pull rod. The hand-rotating device 42 is a butterfly handle or a handwheel.

[0065] As a preferred embodiment, the lower part of the main body plate 1 is provided with safety belt hanging holes 8. There are two safety belt hanging holes 8, which are symmetrically arranged to increase the reliability of the safety belt's grip on the escapee.

[0066] Before use, the hand-rotating device 42 can be rotated to cause the threaded rod 41 to drive the cone rod 43 to move back and forth. When the cone rod 43 moves backward, it can push open the resistance friction plate 2, causing the resistance friction plate 2 to move to both sides, narrowing the arc-shaped adjustment channel 16, and clamping the wire rope 7 more tightly, thus reducing the descent speed. When the hand-rotating device 42 is rotated in the opposite direction, the opposite occurs, thereby achieving the purpose of manually adjusting the descent speed. It has been adjusted before normal use. During use, if a special situation occurs, it can be manually adjusted to achieve the purpose of manually adjusting the descent speed.

[0067] In case of fire, when escaping, put on the safety belt and attach the upper end of the safety belt to the safety belt hanging hole 8. Pull down the hand-operated device 59. The hand-operated device 59 drives the control block 55, the first adjusting shaft 52, and the adjusting sleeve 56 to move downwards along the first inclined slide groove 53 towards the first high hole end 532. Because the first high hole end 532 is farther from the front surface of the lower mounting groove 12 than the first low hole end 531, the adjusting sleeve 56 moves away from the wire rope 7, thus releasing the wire rope 7. The device descends, taking the person down to the ground for a safe escape. To stop, release the hand-operated device 59. The control block 55, under the action of the spring 57, tilts upwards, driving the first adjusting shaft 52 and the adjusting sleeve 56 to tilt upwards towards the first low hole end 531. The adjusting sleeve 56 approaches the wire rope 7, pressing the wire rope 7, and the device stops descending, achieving manual control.

[0068] When the device descends at normal speed, the second adjusting shaft 62, under its own weight and the weight of the self-locking sleeve 64, is positioned at the lower end, the second high hole 632. The self-locking sleeve 64 is in contact with the wire rope 7 and rotates under the friction of the wire rope 7, without any effect. However, during a fire, when people are tense and the device descends too quickly, the wire rope 7 not only rotates the self-locking sleeve 64 but also, under the action of friction, moves the self-locking sleeve 64 and the second adjusting shaft 62 upwards along the second inclined groove 63. The self-locking sleeve 64 approaches the wire rope 7, pressing it down and slowing the device, thus achieving a self-locking anti-stall function and ensuring safety. To unlock, simply press down on both ends of the second adjusting shaft 62 with your thumbs.

[0069] This invention utilizes two steel wire ropes, resulting in higher strength and better safety. Constructed entirely of 304 stainless steel, it will not corrode, rust, age, or jam even after prolonged storage, ensuring a long service life. It guarantees safe use even after 10, 20, or even 30 years, demonstrating high reliability and safety. The invention features a simple structure with highly reliable components, avoiding the use of unreliable structures such as traditional gears, allowing for extended storage, long service life, and high reliability and safety.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable anti-stall self-locking stop device, characterized in that: The main body plate has an upper and lower mounting groove with a forward-recessed opening at the upper and lower parts of its rear surface, respectively. The middle of the rear surface of the main body plate has an adjustment groove with a forward-recessed opening. The left and right sides of the adjustment groove are symmetrical arc-shaped sides. The adjustment groove has two symmetrical rope inlet channels leading to the upper mounting groove at the top and two symmetrical rope outlet channels leading to the lower mounting groove at the bottom. The adjustment groove is equipped with two resistance friction plates that can move left and right. The two resistance friction plates form arc-shaped adjustment channels with the left and right sides of the adjustment groove, respectively. A back plate covering the adjustment groove is fixed to the rear surface of the main body plate. The front surface of the main plate has an adjustment hole leading to the rear surface of the back plate. The adjustment hole passes through the middle of the adjustment groove, and a corresponding nut is fixed at the front end of the adjustment hole. It also includes a manual adjustment device, which includes a threaded rod that is threaded into a nut. The front end of the threaded rod is fixed with a hand-rotating device for easy rotation of the threaded rod. A tapered rod is fixed to the rear end of the threaded rod. The rear end of the tapered rod is smaller than the front end. The tapered rod is located in an adjustment hole and is clamped between two resistance friction plates. The tapered rod is used to push the two resistance friction plates to move to the left and right sides. The rear end of the tapered rod is connected to a limiting device for forward movement. Two symmetrical lower shaft seats are fixed on the left and right sides of the lower mounting groove. A horizontal first adjusting shaft is passed through between the lower shaft seats. A first inclined slide groove is opened in the middle of the two lower shaft seats to cooperate with the first adjusting shaft to move up and down. The upper end and lower end of the first inclined slide groove are the first low hole end and the first high hole end, respectively. The first low hole end is closer to the front surface of the lower mounting groove than the first high hole end. The two sides of the first inclined slide groove penetrate the left and right sides of the lower shaft seats. The two ends of the first adjusting shaft are connected to a first limiting device to prevent the first adjusting shaft from disengaging from the first inclined slide groove. A control block is sleeved on the middle of the first adjusting shaft. Two adjusting round sleeves are also sleeved on the outside of the first adjusting shaft, located on both sides of the control block. The two adjusting round sleeves are located between the two lower shaft seats. A lower rope passage is formed between the adjusting round sleeves and the main body plate. A spring for pushing the control block upward is provided between the front surface of the control block and the front surface of the lower mounting groove. A spring groove for cooperating with the spring is opened on the front surface of the control block and the front surface of the lower mounting groove. A second limiting device for limiting the control block to move backward away from the main body plate is also provided on the control block or the main body plate. A hand pull device for conveniently pulling the control block downward is connected to the lower end of the control block. Two symmetrical upper shaft seats are fixed on the left and right sides of the upper mounting groove. A horizontal second adjusting shaft is passed through between the upper shaft seats. A second inclined slide groove is opened in the middle of the two upper shaft seats to cooperate with the second adjusting shaft to move up and down. The upper end and lower end of the second inclined slide groove are the second low hole end and the second high hole end, respectively. The second low hole end is closer to the front surface of the upper mounting groove than the second high hole end. The two sides of the second inclined slide groove penetrate the left and right sides of the upper shaft seats. The two ends of the second adjusting shaft are connected to a third limiting device to prevent the second adjusting shaft from disengaging from the second inclined slide groove. The second adjusting shaft is fitted with a self-locking round sleeve, which is located between the two upper shaft seats. An upper rope passage is formed between the self-locking round sleeve and the main body plate. It also includes two steel wire ropes, which pass through the upper rope passage, the rope inlet passage, the arc-shaped adjustment passage, the rope outlet passage, and the lower rope passage in sequence.

2. The adjustable anti-stall self-locking stop device as described in claim 1, characterized in that: Both the main body plate and the back plate are rectangular plates, and the back plate is bolted to the main body plate; the lower shaft seat and the upper shaft seat are integrally formed with the main body plate; the lower end and both sides of the lower mounting groove extend to the edge of the main body plate, and the upper end and both sides of the upper mounting groove extend to the edge of the main body plate; the main body plate, back plate, friction plate, manual adjustment device, lower shaft seat, upper shaft seat, first adjustment shaft, second adjustment shaft, control block, adjusting sleeve, self-locking sleeve, spring and hand pull device are all made of 304 stainless steel.

3. The adjustable anti-stall self-locking stop device as described in claim 1, characterized in that: Both the rope inlet channel and the rope outlet channel are arc-shaped or straight channels; the adjustment hole is a round hole or a threaded hole.

4. The adjustable anti-stall self-locking stop device as described in claim 1, characterized in that: The portion between the two rope inlet channels is a rope inlet partition, and the portion between the two rope outlet channels is a rope outlet partition. A guide groove is formed between the rope inlet partition and the rope outlet partition to guide the resistance friction plate to move left and right.

5. The adjustable anti-stall self-locking stop device as described in claim 1, characterized in that: The side of the friction plate near the adjustment groove is an arc-shaped surface, and a rope groove that is concave inward and cooperates with the steel wire rope is formed on the arc-shaped surface. The side of the friction plate away from the adjustment groove is an arc-shaped groove surface, and the arc-shaped groove surface contacts the conical surface of the cone rod.

6. The adjustable anti-stall self-locking stop device as described in claim 1, characterized in that: The spring grooves on the front surface of the control block and the front surface of the lower mounting groove are both centrally symmetrical triangular grooves.

7. The adjustable anti-stall self-locking stop device as described in claim 1, characterized in that: The limiting device includes a cylindrical section fixed coaxially to the rear end of the tapered rod, a radial pin hole on the cylindrical section, a flat washer sleeved on the cylindrical section, and a cotter pin inserted in the pin hole to prevent the flat washer from dislodging from the cylindrical section; or the limiting device is a limiting rod or limiting plate vertically fixed to the rear end of the tapered rod.

8. The adjustable anti-stall self-locking stop device as described in claim 1, characterized in that: The first limiting device includes an end fixed to one end of the first adjusting shaft, the diameter of which is larger than that of the first adjusting shaft. The other end of the first adjusting shaft has a radial first pin hole, and a first cotter pin is inserted into the first pin hole. The third limiting device includes a third flat washer fitted around both ends of the second adjusting shaft. Both ends of the second adjusting shaft have radial third pin holes, and a third cotter pin is inserted into the third pin hole. The third cotter pin is further away from the upper shaft seat than the third flat washer.

9. The adjustable anti-stall self-locking stop device as described in claim 1, characterized in that: The second limiting device includes an L-shaped plate, which is fixed to the front surface of the control block. The L-shaped plate and the control block form an upward-opening limiting groove, and the lower end of the main body plate is located in the limiting groove. The hand-pulling device is a pull ring or an inverted T-shaped pull rod. The hand-rotating device is a butterfly handle or a handwheel.

10. The adjustable anti-stall self-locking stop device as described in any one of claims 1-9, characterized in that: The lower part of the main body plate has a seat belt hanging hole.

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