A manual release mechanism for a belt braking device

Abstract

The present application discloses a manual release mechanism for a belt braking device, comprising: a release cylinder; a manual release fixed flange seat assembly fixedly arranged on the release cylinder, the manual release fixed flange seat assembly including a ratchet wheel; a manual release cable assembly connected to the manual release fixed flange seat assembly, the manual release cable assembly including a ratchet pin mounting seat, and a ratchet pin is installed inside the manual release cable assembly; a release arm sliding seat assembly connected to the release cylinder; a multi-headed screw rod, one end of which is connected to the release arm sliding seat assembly, and the ratchet wheel is sleeved on the other end of the multi-headed screw rod; during normal operation, the ratchet wheel and the ratchet pin remain disengaged so that the multi-headed screw rod is not locked, thereby enabling the belt braking device to normally output braking force; during manual release, by driving the manual release cable assembly to make the ratchet pin snap into the ratchet wheel, after the multi-headed screw rod is unidirectionally locked, the multi-headed screw rod is screwed in the rotatable direction of the ratchet wheel, and the release force is provided by the release arm sliding seat assembly driven by the thread lift provided by the multi-headed screw rod to perform braking release.

Description

Technical Field

[0001] This application relates to the technical field of belt braking devices, and particularly to a manual release mechanism for a belt braking device. Background Art

[0002] The belt braking device for a large gradient rack railway train is installed on a rack bogie, arranged for shaft mounting. Its brake drum is installed on the hollow shaft of the drive braking device of the rack bogie and is fixedly connected to the gear disk through connecting bolts. During braking, the braking force acts on the brake drum and then acts on the rack through the gear disk, ultimately achieving parking braking on the large gradient rack railway line.

[0003] Currently, belt braking devices with parking functions at home and abroad all achieve the release of the parking force by pushing the piston of the release cylinder to move with compressed air. When the release cylinder fails or the energy is interrupted, the belt braking device will remain in the applied brake state, and the release needs to be achieved by removing the clearance adjustment bolt on the brake belt under the narrow vehicle body.

[0004] Due to the belt braking device being provided with a large tension force under the action of the energy storage spring, the disassembly is very laborious. And the operator needs to drill into the narrow space under the vehicle to operate, which poses certain safety hazards. After the clearance adjustment bolt is removed, it cannot be restored online, and there are also relatively large potential risks to train operation safety.

[0005] The prior art transmits the release force through self-locking threads, with low transmission efficiency; in addition, the prior art requires manually reversing the screw again when restoring braking, which is inconvenient to operate in the limited space under the vehicle. In view of the above problems, the present invention provides a manual release and quick reset mechanism and method for a belt braking device that is easy to operate, efficient, and easy to restore. Summary of the Invention

[0006] The embodiments of the present application provide a manual release mechanism for a belt braking device, which at least solves the problems in the prior art such as the complex operation, low efficiency of the belt braking device, and the inconvenience and relatively large potential safety risks in the rescue, maintenance, and testing of rack vehicles.

[0007] The present invention provides a manual release mechanism for a belt braking device, including:

[0008] A release cylinder;

[0009] A manual release fixed flange seat assembly, fixedly arranged on the release cylinder, and the manual release fixed flange seat assembly includes a ratchet wheel;

[0010] A manual release cable assembly, connected to the manual release fixed flange seat assembly, and the manual release cable assembly includes a ratchet pin mounting seat, and a ratchet pin is installed inside the manual release cable assembly;

[0011] The release arm sliding seat assembly is connected to the release cylinder;

[0012] The multi - headed lead screw, one end of which is connected to the release arm sliding seat assembly, and the ratchet is sleeved on the other end of the multi - headed lead screw;

[0013] During normal operation, the ratchet is disengaged from the ratchet pin so that the multi - headed lead screw is not locked, enabling the belt braking device to output braking force normally; during manual release, by driving the hand release cable assembly, the ratchet pin is engaged with the ratchet to unidirectionally lock the multi - headed lead screw, and then the multi - headed lead screw is turned in the rotatable direction of the ratchet. The thread lift provided by the multi - headed lead screw drives the release arm sliding seat assembly to provide a release force for braking release.

[0014] The above - mentioned manual release mechanism for a belt braking device, wherein, the hand release cable assembly further includes:

[0015] The handle assembly;

[0016] The hand release cable, which is connected to the handle assembly;

[0017] The ratchet pin mounting assembly, which is connected to the hand release cable and the hand release fixed flange seat assembly. The ratchet pin mounting assembly includes the ratchet pin mounting seat and the sliding wedge block, and the sliding wedge block is arranged on the ratchet pin mounting seat;

[0018] During manual release, the hand release cable pulls the sliding wedge block to move forward, causing the ratchet pin to engage with the ratchet.

[0019] The above - mentioned manual release mechanism for a belt braking device, wherein, the handle assembly includes:

[0020] The release handle;

[0021] The guiding and positioning sleeve, which is installed on the handle mounting bracket, and the guiding groove and positioning card slot are arranged on the guiding and positioning sleeve;

[0022] The transition sleeve, which is connected to the release handle and the hand release cable;

[0023] The handle positioning pin, which is connected to the transition sleeve and the release handle;

[0024] During manual release, the release handle is pulled so that the handle positioning pin is engaged with the positioning card slot along the guiding groove, and the transition sleeve drives the release cable to pull the moving sliding wedge block to move forward, causing the ratchet pin to move downward and engage with the ratchet.

[0025] The above - mentioned manual release mechanism for a belt braking device, wherein, the ratchet pin mounting assembly further includes:

[0026] A first return spring is arranged between the ratchet pin mounting seat and the sliding wedge block;

[0027] A second return spring is installed on the ratchet pin mounting seat;

[0028] During normal operation, the ratchet is disengaged from the ratchet pin. The sliding wedge block is reset under the spring force of the first return spring, and the ratchet pin rises to the highest position under the spring force of the second return spring. At this time, the ratchet pin is disengaged from the ratchet.

[0029] The above-mentioned manual release mechanism for a belt braking device, wherein the manual release fixed flange seat assembly includes:

[0030] A manual release fixed flange seat, the ratchet pin mounting seat is fixed on the manual release fixed flange seat, and the manual release fixed flange seat includes a sleeve seat, and the sleeve seat is fixedly arranged on the release cylinder.

[0031] The above-mentioned manual release mechanism for a belt braking device, wherein the multi-head screw rod includes:

[0032] A stepped optical rod is arranged at one end of the multi-head screw rod. The ratchet is connected to the stepped optical rod through a flat key, so that the ratchet rotates with the multi-head screw rod;

[0033] Multi-head non-self-locking threads are arranged at the other end of the multi-head screw rod, and the multi-head non-self-locking threads are screwed into the release arm sliding seat assembly.

[0034] The above-mentioned manual release mechanism for a belt braking device, wherein the release arm sliding seat includes:

[0035] A release arm is connected to the release cylinder;

[0036] An upper sliding seat and a lower sliding seat, the upper sliding seat, the lower sliding seat are connected to the release arm;

[0037] A copper nut seat is connected to the upper sliding seat and the lower sliding seat;

[0038] A copper nut is press-fitted into the copper nut seat, and the multi-head non-self-locking threads are screwed into the copper nut;

[0039] The release cylinder drives the release arm to swing, so that the upper sliding seat, the lower sliding seat, and the copper nut seat are displaced relatively, and the displacement of the upper sliding seat and the lower sliding seat compensates for the swing of the release arm.

[0040] The above-mentioned manual release mechanism for a belt braking device, wherein the release arm sliding seat further includes:

[0041] A circular slider, wherein the upper sliding seat and the lower sliding seat are provided with an upper sliding seat slot and a lower sliding seat slot, and the circular slider is respectively sleeved at both ends of the copper nut seat and placed in the upper sliding seat slot and the lower sliding seat slot;

[0042] The length of the upper sliding seat groove and the length of the lower sliding seat groove are set according to the radial displacement difference when the relief arm swings around the rotation fulcrum. The diameter of the circular sliding block is smaller than the width of the upper sliding seat groove and the width of the lower sliding seat groove, and its value is set according to the displacement difference caused by the deflection angle when the piston rod of the relief cylinder is extended and retracted.

[0043] In the above-mentioned manual release mechanism for a band brake device, the horizontal movement distance and the wedge angle of the sliding wedge are set according to the stroke of the ratchet pin.

[0044] In the above-mentioned manual release mechanism for a band brake device, the lead of the lead groove is determined according to the stroke of the ratchet pin and the stroke of the positioning slot.

[0045] Compared with the related art, the present invention proposes a manual release mechanism for a belt brake device that can be quickly restored. The mechanism adopts a multi-head screw as a non-self-locking thread and a sliding seat on the release arm to form a non-self-locking thread transmission pair. No additional positioning tools are required on the vehicle, and the operation is simpler and faster. The present invention adopts a multi-head screw, and its transmission efficiency is higher than that of the self-locking thread, saving time and effort. The present invention adopts a ratchet mechanism and a non-self-locking thread transmission mechanism, which can realize the rapid recovery of the braking force of the belt brake device without manually reversing the screw again. The present invention adopts a flexible hand-release rope structure, which can realize flexible installation arrangement. When the operating space of the running part under the vehicle is limited, it is more conducive to manual relief and recovery of the belt brake device, which brings great convenience and safety guarantee to the rescue, maintenance and testing of rack-rail vehicles.

[0046] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0048] Figure 1 is a schematic diagram of a band brake device body and a manual release mechanism according to an embodiment of the present application;

[0049] Figure 2 is a schematic diagram of the hand relief pull rope composition according to an embodiment of the present application;

[0050] Figure 3 Schematic diagram of the hand release mounting base according to an embodiment of the present application;

[0051] Figure 4 Schematic diagram of the release arm sliding seat according to an embodiment of the present application;

[0052] Figure 5 Schematic diagram of the guiding and positioning sleeve according to an embodiment of the present application;

[0053] Figure 6 Schematic diagram of the release arm sliding seat according to an embodiment of the present application;

[0054] Figure 7 Schematic diagram of the sliding wedge block according to an embodiment of the present application;

[0055] Figure 8 Schematic diagram of the hand release mounting base according to an embodiment of the present application.

[0056] Among them, the reference numerals are:

[0057] Outer wall of the release cylinder: 1-1; Handle assembly: 2-1; Hand release rope: 2-2; Ratchet pin mounting assembly: 2-3; Release handle: 2-1-1; Handle mounting bracket: 2-1-2; Spring wire retaining ring: 2-1-3; Rope fixing nut: 2-1-4; Slotted nut: 2-1-5; Transition sleeve: 2-1-6; Handle positioning pin: 2-1-7; Guiding and positioning sleeve: 2-1-8; Lead groove: 2-1-9; Positioning mounting hole: 2-1-10; Positioning card slot: 2-1-11; Threaded sleeve: 2-1-12; First return spring: 2-3-1; Ratchet pin mounting seat: 2-3-2; Guiding screw: 2-3-3; Second return spring: 2-3-4; Ratchet pin: 2-3-5; Sliding wedge block: 2-3-6; Rolling bearing: 2-3-7; Bearing pin: 2-3-8; Bearing sleeve: 2-3-9; Second return spring mounting seat: 2-3-11; Spring seat: 2-3-12; Ratchet pin hole of the hand release fixed flange seat: 2-3-13; Wedge surface of the sliding wedge block: 2-3-14; Hand release fixed flange seat: 3-1; Hand release mounting base: 3-2; Ratchet pin hole: 3-3; Mounting screw hole for the hand release rope assembly: 3-4; Bearing seat: 3-5; Flat key: 3-6; Bearing: 3-7; Ratchet: 3-8; End cover: 3-9; Sleeve seat: 3-1-1; Box body: 3-1-2; Multi-start non-self-locking thread: 4-2; One end is a stepped smooth rod with a keyway: 4-1; Release arm: 6-1; Upper sliding seat: 6-2; Copper nut seat: 6-3; Copper nut: 6-4; Slide block: 6-5; Lower sliding seat: 6-6; Upper sliding seat chute: 6-2-2; Lower sliding seat chute: 6-6-2. Detailed implementation manners

[0058] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be described and explained 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. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0059] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without making creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in such a development process may be complex and time-consuming, for those of ordinary skill in the art related to the disclosed content of the present application, some design, manufacturing or production changes made based on the technical content disclosed in the present application are only conventional technical means and should not be understood that the disclosed content of the present application is insufficient.

[0060] Referring to "embodiment" in the present application means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict.

[0061] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the ordinary meanings understood by those with ordinary skills in the technical field to which this application belongs. The words such as "a", "an", "one kind", "the" and the like involved in this application do not indicate a quantity limitation and may represent a singular or plural number. The terms "comprising", "including", "having" and any variations thereof involved in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or units, but may further include unlisted steps or units, or may further include other steps or units inherent to these processes, methods, products or devices. The words such as "connected", "coupled", "linked" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and rear associated objects. The terms "first", "second", "third" and the like involved in this application are only used to distinguish similar objects and do not represent a specific sorting of the objects.

[0062] The present invention provides a manual release mechanism for a belt braking device that can be quickly restored. The present invention can achieve the transmission of the release force without installing on-vehicle positioning accessories, is more convenient to operate, and has high transmission efficiency; in addition, the present invention is convenient to operate in the limited space under the vehicle, bringing great convenience and safety guarantee for the rescue, maintenance and test of rack vehicles.

[0063] Embodiment 1

[0064] This embodiment also provides a manual release mechanism for a belt braking device that can be quickly restored. Please refer to Figures 1 to 8 , Figure 1 which is a schematic diagram of the main body of the belt braking device and the manual release mechanism according to the embodiment of the present application; Figure 2 which is a schematic diagram of the composition of the manual release pull rope according to the embodiment of the present application; Figure 3 which is a schematic diagram of the composition of the manual release mounting seat according to the embodiment of the present application; Figure 4 which is a schematic diagram of the composition of the release arm sliding seat according to the embodiment of the present application; Figure 5 which is a schematic diagram of the guiding and positioning sleeve according to the embodiment of the present application; Figure 6 which is a schematic diagram of the release arm sliding seat according to the embodiment of the present application; Figure 7 which is a schematic diagram of the sliding wedge according to the embodiment of the present application; Figure 8 which is a schematic diagram of the manual release mounting seat according to the embodiment of the present application.

[0065] As Figure 1 shown, the manual release mechanism of the belt braking device mainly consists of a belt braking device release cylinder 1, a manual release pull rope assembly 2, a manual release mounting seat assembly 3, a multi-headed screw rod 4, an energy storage spring assembly 5, and a release arm sliding seat assembly 6; the belt braking device release cylinder 1 includes a release cylinder outer wall 1-1; the manual release pull rope assembly 2 is composed of a handle assembly 2-1, a manual release pull rope 2-2, and a ratchet pin mounting assembly 2-3.

[0066] As Figure 2 、 Figure 5 and Figure 7 shown, the handle assembly 2-1 is composed of a release handle 2-1-1, a handle mounting bracket 2-1-2, a spring wire retaining ring 2-1-3, a pull rope fixing nut 2-1-4, a slotted nut 2-1-5, a transition sleeve 2-1-6, a handle positioning pin 2-1-7, a guide positioning sleeve 2-1-8, a lead groove 2-1-9, a positioning mounting hole 2-1-10, a positioning card slot 2-1-11, a threaded sleeve 2-1-12, etc.;

[0067] The handle mounting bracket 2-1-2 is fixed to the driving frame or the bogie frame by welding or bolts, etc. A sleeve 2-1-12 with a threaded end is provided on the handle mounting bracket 2-1-2, and one end of the manual release pull rope 2-2 is fixed to the handle mounting bracket 2-1-2 by a pull rope fixing nut 2-1-4; the guide positioning sleeve 2-1-8 is installed on the handle mounting bracket 2-1-2 through a positioning mounting hole 2-1-10, and a lead groove 2-1-9 and a positioning card slot 2-1-11 are provided thereon; the release handle 2-1-1 passes through the guide positioning sleeve 2-1-8, and the handle positioning pin 2-1-7 is pressed into the round hole on the handle 2-1-1; the handle 2-1-1 is connected to the release pull rope 2-2 through a transition sleeve 2-1-6; one end of the transition sleeve 2-1-6 is connected to the handle 2-1-1 by a spring wire retaining ring 2-1-3, and the other end is connected to the release pull rope 2-2 by a slotted nut 2-1-5;

[0068] Among them, the lead L of the lead groove 2-1-9 is determined according to the stroke △L of the ratchet pin 2-1-1 and the stroke △K of the positioning card slot 2-1-11;

[0069] Among them, pulling the handle and rotating it can make the handle positioning pin 2-1-7 move along the lead groove 2-1-9 on the guide positioning sleeve 2-1-8 and snap into the positioning slot 2-1-11, thereby realizing the locking of the hand release rope 2-2; to prevent the rope 2-2 from being torqued during the rotation of the handle 2-1-1, the handle 2-1-1 and the release rope 2-2 are connected through a transition sleeve 2-1-6; when pulling the release handle 2-1-1, the rope 2-2 and the moving sliding wedge 2-3-6 are driven to move horizontally to the left through the transition sleeve 2-1-6, and finally the downward movement of the ratchet pin 2-3-5 is realized, thereby locking the rotation of the ratchet wheel 3-8; when deflecting and locking the handle 2-1-1, the rope 2-2 is not affected.

[0070] The ratchet pin mounting assembly 2-3 includes a first return spring 2-3-1, a ratchet pin mounting seat 2-3-2, a guide screw 2-3-3, a second return spring 2-3-4, a ratchet pin 2-3-5, a sliding wedge 2-3-6, a rolling bearing 2-3-7, a bearing pin 2-3-8, a bearing sleeve 2-3-9, a second return spring mounting seat 2-3-11, a spring seat 2-3-12, a hand release mounting seat ratchet pin hole 2-3-13, and a sliding wedge wedge surface 2-3-14.

[0071] The ratchet pin mounting seat 2-3-2 is fixed to the hand release mounting seat 3-1 by bolts. The sliding wedge 2-3-6 is arranged on the ratchet pin mounting seat 2-3-2. One end of the sliding wedge 2-3-6 is connected to the hand release rope 2-2. A first return spring 2-3-1 is placed between the sliding wedge 2-3-6 and the ratchet pin mounting seat 2-3-2 and is guided by a guide screw 2-3-3. A ratchet pin mounting groove 2-3-10 is opened in the middle of the sliding wedge 2-3-6. A second return spring mounting seat 2-3-11 is provided on the ratchet pin mounting seat 2-3-2. One end of the ratchet pin 2-3-5 is fixed with a bearing 2-3-7 through a bearing sleeve 2-3-8 and a bearing pin 2-3-9. One end of the ratchet pin 2-3-5 is provided with a spring seat 2-3-12, which passes through the second return spring 2-3-4, the hand release mounting seat ratchet pin hole 2-3-13, and the ratchet pin hole 3-3. Under the spring force of the second return spring 2-3-4, the bearing 2-3-7 is always in contact with the wedge surface 2-3-14 of the sliding wedge. Among them, by pulling the hand release rope to overcome or release the spring forces of the first return spring 2-3-1 and the second return spring 2-3-4, the horizontal movement of the sliding wedge 2-3-6 is converted into the vertical movement of the ratchet pin 2-3-5.

[0072] Among them, the horizontal movement distance △S and the wedge angle △θ of the sliding wedge 2-3-6 are set according to the stroke △L of the ratchet pin 2-3-5.

[0073] Such as Figure 3 And Figure 8As shown in the figure, the hand release mounting seat assembly 3 includes a hand release fixed flange seat 3-1, a hand release mounting seat 3-2, a ratchet pin hole 3-3, a mounting screw hole 3-4 for the hand release cable assembly, a bearing seat 3-5, a flat key 3-6, a bearing 3-7, a ratchet 3-8, and an end cover 3-9. Among them, the hand release mounting seat 3-1 is divided into a sleeve seat 3-1-1 and a box body 3-1-2.

[0074] The hand release mounting seat assembly 3 is fixed on the release cylinder 1 of the belt braking device. The release fixed flange seat 3-1 and the hand release mounting seat 3-2 are a rigid whole. The hand release fixed flange seat 3-1 is sleeved and fixed on the outer wall 1-1 of the release cylinder through the middle flange 3-1-1. The hand release mounting seat 3-2 is the mounting base of the hand release cable assembly 2. The box body 3-1-2 is provided with a ratchet pin hole 3-3, a mounting screw hole 3-4 for the hand release cable assembly, a bearing seat 3-5, etc. The bearings 3-7 are assembled in pairs and nested in the bearing seats 3-5 of the box body and the end cover. The ratchet 3-8 is in keyway fit transmission with the multi-start lead screw polished rod 4-1 through the flat key 3-6, and the ratchet teeth of the ratchet 3-8 are aligned with the ratchet pin hole 3-3. An end cover 3-9 is provided at one end of the box body and is fixed on the box body by threads. O-ring seals are provided at all the hole parts of the entire box body, making the entire box body an airtight cavity. In order to ensure the flexible operation of the mechanism, grease will be filled in the box body.

[0075] As Figure 3 shown in the figure, one end of the multi-start lead screw 4 is a multi-start non-self-locking thread 4-2, and the other end is a stepped polished rod 4-1 provided with a keyway.

[0076] The threaded end 4-2 of the multi-start lead screw is screwed into the copper nut 6-4 to form a transmission thread pair. The polished rod part passes through the box body 3-1-2 of the hand release mounting seat and is in rotational pair with a pair of bearings 3-7 arranged in the box body. Among them, the ratchet 3-8 is sleeved on the polished rod 4-1 part of the multi-start lead screw and is connected by a flat key 3-6, so that the ratchet 3-8 can rotate together with the multi-start lead screw 4.

[0077] As Figure 4 and Figure 6 shown in the figure, the release arm sliding seat assembly 6 is composed of a release arm 6-1, an upper sliding seat 6-2, a copper nut seat 6-3, a copper nut 6-4, a slider 6-5, a lower sliding seat 6-6, etc.

[0078] The upper sliding seat 6-2 and the lower sliding seat 6-6 are sleeved on the step at the end of the relief arm through the middle upper sliding seat groove 6-2-1 and the lower sliding seat 6-6-1, and are fixed with bolts; the upper sliding seat waist-shaped slide groove 6-2-2 and the lower sliding seat waist-shaped slide groove 6-6-2 are opened in the upper sliding seat 6-2 and the lower sliding seat 6-6; the slider 6-5 is respectively sleeved on both ends of the copper nut seat 6-3, and is placed in the upper sliding seat waist-shaped slide groove 6-2-2 and the lower sliding seat waist-shaped slide groove 6-6-2, relieving The extension and retraction of the piston rod of the cylinder 1 will drive the relief arm 6-1 to swing, so that the upper sliding seat waist-shaped groove 6-2-2 and the lower sliding seat waist-shaped groove 6-6-2 and the copper nut seat 6-3 and the slider 6-5 are relatively displaced. The displacement of the upper sliding seat 6-2 and the lower sliding seat 6-6 compensates for the swing of the relief arm 6-1. Therefore, the multi-head screw 4 is always vertically and stably installed on the hand relief mounting seat 3-1 without being affected by the swing of the relief arm 6-1; the multi-head copper nut 6-4 is pressed into the copper nut seat 6-3;

[0079] Among them, the length of the upper sliding seat waist-shaped groove 6-2-2 and the lower sliding seat waist-shaped groove 6-6-2 is set according to the radial displacement difference △H when the relief arm swings around the rotation fulcrum; wherein, the diameter of the set circular slider 6-5 is smaller than the width of the sliding seat groove, and its value is set according to the displacement difference △G caused by the deflection angle when the piston rod of the relief cylinder 1 is extended and retracted.

[0080] Embodiment 2

[0081] This embodiment also provides a specific implementation method of the manual release function of the band brake device.

[0082] When the rack-rail vehicle needs rescue, the relief handle 2-1-1 is pulled and rotated to a first preset angle, so that the handle locating pin 2-1-7 moves along the guide groove 2-1-9 on the guide locating sleeve 2-1-8 and is stuck in the locating slot 2-1-11, and the transition sleeve 2-1-6 drives the relief rope 2-2 to move horizontally to the left, and the hand relief rope 2-2 pulls the sliding wedge 2-3-6 forward, so that the ratchet pin 2-3-5 moves downward and falls into the tooth groove of the ratchet 3-8, thereby locking the rotation of the ratchet 3-8, and then the multi-head screw 4 is rotated along the rotatable direction of the ratchet 3-8. Under the action of the threaded lift of the multi-head screw 4, the relief force is transmitted to the relief arm 6-1 through the sliding component 6, and the relief arm 6-1 is stretched open, and finally the spring force of the energy storage spring 5 is overcome, so that the belt brake device is manually relieved.

[0083] Under normal operating conditions, the handle locating pin 2-1-7 falls into the bottom of the lead groove 2-1-9, the sliding wedge 2-3-6 is reset under the action of the spring force of the first reset spring 2-3-1, and the ratchet pin 2-3-5 rises to the highest position under the action of the spring force of the second reset spring 2-3-4. At this time, the ratchet pin 2-3-5 is disengaged from the ratchet 3-8, and the multi-start lead screw 4 rotates freely with the action of the relief arm 6-1, and the belt braking force is applied normally.

[0084] When the multi-head screw 4 cannot achieve reset rotation, the belt brake device will maintain the brake release state. When the braking force of the belt brake device is to be quickly restored, the release handle 2-1-1 is rotated in the opposite direction by a second preset angle, so that the handle locating pin 2-1-7 disengages the locating slot 2-1-11. Under the spring force of the first reset spring 2-3-1, the release handle 2-1-1 will automatically reset, and the sliding wedge 2-3-6 will move to the far right. The ratchet pin 2-3-5 will move upward under the spring force of the second reset spring 2-3-4, and the ratchet pin 2-3-5 will disengage from the ratchet 3-8, and the ratchet 3-8 will resume rotation. Under the action of the energy storage spring assembly 5, the release arm 6-1 will quickly retreat to the braking position, and the multi-head screw 4 will rotate freely with the action of the release arm 6-1. Since the multi-head screw 4 is a non-self-locking thread, under the action of the energy storage spring 5 of the belt brake device, the release arm 6-1 will quickly retreat to the braking position and apply the belt braking force again.

[0085] In summary, the present invention relates to a manual relief mechanism for a belt brake device that can be quickly restored. The present invention adopts a multi-head screw as a non-self-locking thread and a sliding seat on the relief arm to form a non-self-locking thread transmission pair. Therefore, no additional positioning on-board tools are required for manual relief, and the operation is simpler and faster. The multi-head screw used in the present invention has a higher transmission efficiency than the self-locking thread, saving time and effort. In addition, the present invention realizes the rapid recovery of the braking force of the belt brake device, and at the same time, realizes a flexible installation arrangement. When the operating space of the undercarriage running part is limited, it is more conducive to the manual relief and recovery of the belt brake device, which brings great convenience and safety guarantee to the rescue, maintenance and testing of rack rail vehicles.

[0086] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the protection scope of the attached claims.

Claims

1. A manual release mechanism for a belt braking device, characterized in that, Comprising: Release cylinder; Manual release fixed flange seat assembly, fixedly provided on the release cylinder, the manual release fixed flange seat assembly includes a ratchet; Manual release pull rope assembly, connected to the manual release fixed flange seat assembly, the manual release pull rope assembly includes a ratchet pin mounting seat, and a ratchet pin is installed inside the manual release pull rope assembly; Release arm sliding seat assembly, connected to the release cylinder; Multi-headed lead screw, one end of which is connected to the release arm sliding seat assembly, and the ratchet is sleeved on the other end of the multi-headed lead screw; During normal operation, the ratchet and the ratchet pin remain disengaged so that the multi-headed lead screw is not locked, so that the belt braking device can normally output braking force; during manual release, by driving the manual release pull rope assembly, the ratchet pin is engaged with the ratchet, after unidirectionally locking the multi-headed lead screw, turn the multi-headed lead screw along the rotatable direction of the ratchet, and drive the release arm sliding seat assembly to provide a release force for braking release through the thread lift provided by the multi-headed lead screw; Wherein, the multi-headed lead screw includes: Step smooth rod, provided at one end of the multi-headed lead screw, and the ratchet is connected to the step smooth rod through a flat key, so that the ratchet rotates with the multi-headed lead screw; Multi-headed non-self-locking thread, provided at the other end of the multi-headed lead screw, and the multi-headed non-self-locking thread is screwed into the release arm sliding seat assembly.

2. The manual relief mechanism according to claim 1, wherein, The manual release pull rope assembly further includes: Handle assembly; Manual release pull rope, connected to the handle assembly; Ratchet pin mounting assembly, connected to the manual release pull rope and the manual release fixed flange seat assembly, the ratchet pin mounting assembly includes the ratchet pin mounting seat and a sliding wedge block, and the sliding wedge block is arranged on the ratchet pin mounting seat; During manual release, the manual release pull rope pulls the sliding wedge block to move forward, so that the ratchet pin is engaged with the ratchet.

3. The manual relief mechanism according to claim 2, wherein, The handle assembly includes: Release handle; Guide positioning sleeve, installed on the handle mounting bracket, and a lead groove and a positioning card slot are provided on the guide positioning sleeve; Transition sleeve, connected to the release handle and the manual release pull rope; Handle positioning pin, connected to the transition sleeve and the release handle; During manual release, pull the release handle so that the handle positioning pin is engaged with the positioning card slot along the lead groove, and drive the manual release pull rope by the transition sleeve to pull the sliding wedge block to move forward, so that the ratchet pin moves downward and is engaged with the ratchet.

4. The manual relief mechanism according to claim 2, wherein, The ratchet pin mounting assembly further includes: First return spring, arranged between the ratchet pin mounting seat and the sliding wedge block; Second return spring, installed on the ratchet pin mounting seat; During normal operation, the ratchet and the ratchet pin remain disengaged, the sliding wedge block is reset under the spring force of the first return spring, and the ratchet pin rises to the highest position under the spring force of the second return spring, at this time the ratchet pin is disengaged from the ratchet.

5. The manual relief mechanism according to claim 1, wherein The manual release fixed flange seat assembly includes: Manual release fixed flange seat, the ratchet pin mounting seat is fixed on the manual release fixed flange seat, the manual release fixed flange seat includes a sleeve seat, and the sleeve seat is fixedly provided on the release cylinder.

6. The manual relief mechanism according to claim 1, wherein, The release arm sliding seat includes: The release arm, connected to the release cylinder; The upper sliding seat and the lower sliding seat, the upper sliding seat, the lower sliding seat are connected to the release arm; The copper nut seat, connected to the upper sliding seat and the lower sliding seat; The copper nut, press-fitted in the copper nut seat, and the multi-start non-self-locking thread is screwed into the copper nut; The release cylinder drives the release arm to swing, causing relative displacement of the upper sliding seat, the lower sliding seat, and the copper nut seat, and compensating for the swing of the release arm through the displacement of the upper sliding seat and the lower sliding seat.

7. The manual relief mechanism according to claim 6, characterized in that, The release arm sliding seat further includes: A circular slider, with an upper sliding seat chute and a lower sliding seat chute opened in the upper sliding seat and the lower sliding seat respectively. The circular slider is sleeved at both ends of the copper nut seat and placed in the upper sliding seat chute and the lower sliding seat chute; The length of the upper sliding seat chute and the length of the lower sliding seat chute are set according to the radial displacement difference when the release arm swings around the rotation fulcrum. The diameter of the set circular slider is smaller than the width of the upper sliding seat chute and the width of the lower sliding seat chute, and its value is set according to the displacement difference generated by the deflection angle when the piston rod of the release cylinder expands and contracts.

8. The manual relief mechanism according to claim 2, wherein, The horizontal movement distance and the wedge angle of the sliding wedge block are set according to the stroke of the ratchet pin.

9. The manual relief mechanism according to claim 3, wherein, The lead of the lead groove is determined according to the stroke of the ratchet pin and the stroke of the positioning card slot.

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