阅读说明：本技术 附加制动器及自动扶梯或自动人行道 (Additional brake and escalator or moving sidewalk ) 是由 李勇勇 钟立泰 何星泉 张大明 李春雷 于 2021-09-01 设计创作，主要内容包括：本发明涉及一种附加制动器及自动扶梯或自动人行道,包括：驱动链轮,所述驱动链轮的内部形成有容置凹腔,所述驱动链轮的外圆周用于套装驱动链条,所述驱动链轮的外周壁设有第一阻油沟槽,所述第一阻油沟槽位于所述驱动链条与所述容置凹腔之间；以及摩擦片,所述摩擦片设置于所述容置凹腔内。由于驱动链轮的外周壁设置有第一阻油沟槽,在运行过程中,涂覆于驱动链轮与驱动链条上的润滑油由于受到第一阻油沟槽的阻挡作用,润滑油只能够沿着第一阻油沟槽顺流至接油盘中,而无法流入容置凹腔内并沾染到摩擦片的表面,因而可以保障摩擦片的摩擦系数不会降低,保证附加制动器具有优良的制动性能,确保自动扶梯或自动人行道能够持续正常安全运行。(The invention relates to an additional brake and an escalator or a moving sidewalk, comprising: the oil-blocking mechanism comprises a driving chain wheel, a first oil-blocking groove and a second oil-blocking groove, wherein a containing concave cavity is formed inside the driving chain wheel, a driving chain is sleeved on the outer circumference of the driving chain wheel, the outer circumferential wall of the driving chain wheel is provided with the first oil-blocking groove, and the first oil-blocking groove is positioned between the driving chain and the containing concave cavity; and the friction plate is arranged in the accommodating concave cavity. Because the periphery wall of driving sprocket is provided with first oily slot that hinders, at the operation in-process, coat in the lubricating oil on driving sprocket and drive chain because receive the first effect of hindering oily slot that hinders, lubricating oil can only flow to connect the food tray along first oily slot that hinders, and can't flow in the holding cavity and be infected with the surface of friction disc, therefore can ensure that the coefficient of friction disc can not reduce, guarantee that additional brake has good brake performance, ensure that automatic escalator or moving walk can last normal safe operation.)

1. An additional brake, characterized in that the additional brake comprises:

the oil-blocking mechanism comprises a driving chain wheel, a first oil-blocking groove and a second oil-blocking groove, wherein a containing concave cavity is formed inside the driving chain wheel, a driving chain is sleeved on the outer circumference of the driving chain wheel, the outer circumferential wall of the driving chain wheel is provided with the first oil-blocking groove, and the first oil-blocking groove is positioned between the driving chain and the containing concave cavity; and

the friction plate is arranged in the accommodating concave cavity.

2. The additional brake of claim 1, wherein the first oil blocking groove is provided in at least two, and at least two of the first oil blocking grooves are sequentially provided in a thickness direction of the driving sprocket.

3. The supplemental brake of claim 1, wherein the inner wall of the receiving cavity is provided with a second oil blocking groove between the drive sprocket and the friction plate.

4. The additional brake of claim 3, wherein the second oil blocking grooves are provided in at least two, and at least two of the second oil blocking grooves are sequentially provided in a thickness direction of the driving sprocket.

5. The supplemental brake of claim 1, wherein the inner wall of the receiving cavity is formed with a first tapered portion.

6. The additional brake of claim 3, further comprising a ratchet wheel, a brake pressing plate, an elastic pressing assembly and a bolt assembly, wherein the ratchet wheel, the brake pressing plate and the elastic pressing assembly are all disposed in the accommodating cavity, the friction plate is disposed between the driving sprocket and the ratchet wheel and between the ratchet wheel and the brake pressing plate, the elastic pressing assembly is arranged on one side of the brake pressing plate far away from the driving sprocket in a buckling manner, and the bolt assembly connects and fixes the driving sprocket, the friction plate, the ratchet wheel, the brake pressing plate and the elastic pressing assembly.

7. The supplemental brake of claim 6, further comprising a support friction reducer sleeved between the inner race of the ratchet wheel and the drive sprocket.

8. The supplemental brake of claim 7, wherein the support friction reducing member is a self-lubricating bearing.

9. The supplemental brake of claim 6, wherein the ratchet, the brake pressure plate, the resilient hold-down assembly, and the bolt assembly are all located inside an edge line of the second oil-blocking groove.

10. Escalator or moving walkway, comprising an additional brake according to any of claims 1 to 9.

Technical Field

The invention relates to the technical field of elevator braking equipment, in particular to an additional brake and an escalator or a moving sidewalk.

Background

The additional brake is an auxiliary brake device in the escalator or the moving sidewalk, and when the escalator or the moving sidewalk needs emergency braking, the additional brake acts rapidly, so that the escalator or the moving sidewalk can be effectively braked and stopped. At present, an additional brake which is commonly used in the industry is formed by assembling a pawl device, a brake device, an electromagnetic device and a motion detection device and is arranged on a truss system of an escalator when in use.

The brake device is generally composed of two friction plates, the two friction plates are respectively pressed on the inner side and the outer side of the brake disc, and the friction resistance generated by the relative movement of the friction plates and the brake disc is utilized to realize the braking. Escalator or moving walk adopt the rotatory step operation that realizes of sprocket drive chain, in order to guarantee chain life, the chain needs lubricate. However, in actual operation, lubricating oil easily flows into the additional brake and is contaminated on the surface of the friction plate, so that the friction coefficient of the friction plate is remarkably reduced, the braking performance of the additional brake is greatly influenced, and the escalator or the moving sidewalk cannot be effectively stopped in emergency (such as overspeed and reversion).

Disclosure of Invention

Therefore, an additional brake and an escalator or a moving sidewalk are needed to be provided, and the problems that in the prior art, lubricating oil is contaminated by friction plates to cause the friction coefficient of the friction plates to be reduced, the braking performance of the additional brake is affected, and the escalator or the moving sidewalk runs normally and safely are solved.

In one aspect, the present application provides an additional brake, including:

the oil-blocking mechanism comprises a driving chain wheel, a first oil-blocking groove and a second oil-blocking groove, wherein a containing concave cavity is formed inside the driving chain wheel, a driving chain is sleeved on the outer circumference of the driving chain wheel, the outer circumferential wall of the driving chain wheel is provided with the first oil-blocking groove, and the first oil-blocking groove is positioned between the driving chain and the containing concave cavity; and

the friction plate is arranged in the accommodating concave cavity.

The additional brake of the scheme is applied to the escalator or the moving sidewalk and used for braking the escalator or the moving sidewalk in time when an emergency occurs, so that safety accidents are avoided. Specifically, the friction disc is as braking component, installed in drive sprocket's holding cavity, because drive sprocket's periphery wall is provided with first oily slot that hinders, therefore in daily operation in-process, the lubricating oil that flows through on drive sprocket and drive chain is owing to receive the effect of hindering of first oily slot that hinders, lubricating oil can only follow the same current to connect the food tray along first oily slot that hinders, and can't flow in the holding cavity and be infected with the surface of friction disc, therefore can ensure that the coefficient of friction disc can not reduce, guarantee that additional brake has good brake performance, ensure that automatic escalator or moving walk can last normal safe operation.

The technical solution of the present application is further described below:

in one embodiment, the first oil blocking grooves are arranged in at least two, and at least two first oil blocking grooves are arranged in sequence along the thickness direction of the driving chain wheel.

In one embodiment, the inner wall of the accommodating cavity is provided with a second oil blocking groove, and the second oil blocking groove is positioned between the driving chain wheel and the friction plate.

In one embodiment, the number of the second oil blocking grooves is at least two, and at least two of the second oil blocking grooves are sequentially arranged along the thickness direction of the driving sprocket.

In one embodiment, the inner wall of the receiving cavity is formed with a first conical surface portion.

In one embodiment, the additional brake further comprises a ratchet wheel, a brake pressing plate, an elastic pressing assembly and a bolt assembly, the ratchet wheel, the brake pressing plate and the elastic pressing assembly are all arranged in the accommodating cavity, the friction plates are arranged between the driving chain wheel and the ratchet wheel and between the ratchet wheel and the brake pressing plate, the elastic pressing assembly is arranged on one side, away from the driving chain wheel, of the brake pressing plate in a buckling mode, and the bolt assembly connects and fixes the driving chain wheel, the friction plates, the ratchet wheel, the brake pressing plate and the elastic pressing assembly.

In one embodiment, the additional brake further comprises a support friction reducing member, and the support friction reducing member is sleeved between the inner ring of the ratchet wheel and the driving chain wheel.

In one embodiment, the supporting antifriction component is a self-lubricating bearing.

In one embodiment, the ratchet wheel, the brake pressure plate, the elastic pressing component and the bolt component are all located inside the edge line of the second oil blocking groove.

In another aspect, the present application also provides an escalator or moving walkway including an additional brake as described above.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an additional brake according to an embodiment of the present invention.

Description of reference numerals:

10. a drive sprocket; 11. the concave cavity is accommodated; 12. a first oil blocking groove; 13. a second oil blocking groove; 14. a first conical surface portion; 20. a drive chain; 30. a friction plate; 40. a ratchet wheel; 50. braking the pressure plate; 51. a second tapered surface portion; 60. an elastic compression assembly; 70. a bolt assembly; 80. a self-lubricating bearing.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1, an additional brake is shown for an embodiment of the present application, the additional brake including: drive sprocket 10 and friction plate 30. An accommodating cavity 11 is formed inside the driving sprocket 10, the outer circumference of the driving sprocket 10 is used for sleeving a driving chain 20, a first oil blocking groove 12 is formed in the outer circumferential wall of the driving sprocket 10, and the first oil blocking groove 12 is located between the driving chain 20 and the accommodating cavity 11; the friction plate 30 is disposed in the accommodation cavity 11.

In summary, the implementation of the technical solution of the present embodiment has the following beneficial effects: the additional brake of the scheme is applied to the escalator or the moving sidewalk and used for braking the escalator or the moving sidewalk in time when an emergency occurs, so that safety accidents are avoided. Specifically, the friction plate 30 is used as a braking component and is installed in the accommodating cavity 11 of the driving sprocket 10, and since the first oil blocking groove 12 is formed in the outer peripheral wall of the driving sprocket 10, in the daily operation process, the lubricating oil flowing through the driving sprocket 10 and the driving chain 20 can only flow to the oil receiving disc along the first oil blocking groove 12 due to the blocking effect of the first oil blocking groove 12, but cannot flow into the accommodating cavity 11 and contaminate the surface of the friction plate 30, so that the friction coefficient of the friction plate 30 can not be reduced, the additional brake is ensured to have excellent braking performance, and the escalator or the moving walkway can continuously and safely operate.

In this embodiment, the driving sprocket 10 and the step sprocket are coaxially installed, and a step chain is fitted around the step sprocket. When the driving sprocket 10 is driven to rotate, the step sprockets can be synchronously driven, and then the step units are driven to rotate through the step chains, so that the escalator or the moving sidewalk can run.

The first oil blocking groove 12 is preferably formed on the outer periphery of the drive sprocket 10 on the side away from the step sprocket. The cross section of the first oil blocking groove 12 can be U-shaped, trapezoid, V-shaped, etc. according to actual needs. For example, in the present embodiment, the cross section of the first oil blocking groove 12 is preferably trapezoidal. And two side walls of the trapezoidal first oil blocking groove 12 are both obliquely arranged. This is more favorable to the lubricating oil of drive chain 20 department easily to flow into first hinder oily slot 12 in, and simultaneously again difficult to flow out from first hindering oily slot 12 again, makes lubricating oil more reliable flow direction connect the food tray.

On the basis of the above embodiment, further, the first oil blocking grooves 12 are provided in at least two, and at least two of the first oil blocking grooves 12 are sequentially provided in the thickness direction of the drive sprocket 10. Thus, the at least two first oil blocking grooves 12 form at least two front and rear blocking for the lubricating oil from the driving chain 20, so that the lubricating oil can be prevented from flowing into the accommodating groove and contaminating the friction plate 30 better and more thoroughly.

With reference to fig. 1, in addition, on the basis of any of the above embodiments, the inner wall of the receiving cavity 11 is provided with a second oil blocking groove 13, and the second oil blocking groove 13 is located between the driving sprocket 10 and the friction plate 30. In actual work, it is inevitable that some lubricating oil will break through the blocking of the first oil blocking groove 12 and seep to the accommodating cavity 11, and at this time, the second oil blocking groove 13 can further play a role in blocking the lubricating oil entering the accommodating cavity 11, so that the lubricating oil is more thoroughly prevented from flowing to the deep part of the accommodating cavity 11, and the safety of the friction plate 30 is ensured.

It should be noted that the shape, size, etc. of the second oil blocking groove 13 are similar to those of the first oil blocking groove 12, and therefore are not described herein again.

Preferably, in the present embodiment, the second oil blocking groove 13 is provided in at least two, and at least two of the second oil blocking grooves 13 are sequentially provided along the thickness direction of the driving sprocket 10. Thus, the at least two second oil blocking grooves 13 form at least two barriers to the lubricant entering the accommodating cavity 11, so that the lubricant can be prevented from flowing into the accommodating groove and contaminating the friction plate 30 better and more thoroughly.

With continued reference to fig. 1, in still other embodiments, the inner wall of the receiving cavity 11 is formed with a first tapered surface portion 14. The first tapered surface portion 14 can further prevent the lubricating oil from flowing to the deep part of the accommodating cavity 11 along the inner wall of the accommodating cavity 11, and thus flowing to the surface of the friction plate 30, and thus avoiding affecting the friction coefficient of the friction plate 30.

With reference to fig. 1, in addition, on the basis of any of the above embodiments, the additional brake further includes a ratchet 40, a brake pressure plate 50, an elastic pressing assembly 60 and a bolt assembly 70, the ratchet 40, the brake pressure plate 50 and the elastic pressing assembly 60 are all disposed in the accommodating cavity 11, the friction plate 30 is disposed between the driving sprocket 10 and the ratchet 40 and between the ratchet 40 and the brake pressure plate 50, the elastic pressing assembly 60 is fastened and pressed on a side of the brake pressure plate 50 away from the driving sprocket 10, and the bolt assembly 70 connects and fixes the driving sprocket 10, the friction plate 30, the ratchet 40, the brake pressure plate 50 and the elastic pressing assembly 60.

The ratchet wheel 40, the brake pressure plate 50, the friction plate 30 and other parts are all arranged in the accommodating concave cavity 11, so that the internal space of the driving chain wheel 10 is fully utilized, the overall size of the additional brake is reduced, the occupied installation space is small, and the application range is wider. The ratchet wheel 40, the brake pressure plate 50, the friction plate 30 and the driving chain wheel 10 are connected through a bolt assembly 70 and can be in mutual pressing contact; an elastic pressing component 60 is sleeved between the bolt and the braking pressing plate 50, and the pressure on the surface of the friction plate 30 can be controlled by adjusting the compression amount of the elastic pressing component 60, so that the braking force with different required sizes can be controlled and generated, and the running requirements of the escalator or the moving sidewalk under different working conditions can be met.

Optionally, in this embodiment, the elastic pressing assembly 60 includes a disc spring seat and a disc spring, the bolt assembly 70 applies pressure to the disc spring seat in a direction toward the friction plate 30, and the disc spring seat presses the disc spring to deform, so that the disc spring can generate elastic pressure to the braking pressure plate 50, and the braking pressure plate 50 is ensured to be tightly pressed against the friction plate 30 and the ratchet 40, thereby ensuring good braking capability.

With reference to fig. 1, in addition to any of the above embodiments, the additional brake further includes a self-lubricating bearing 80, and the self-lubricating bearing 80 is sleeved between the inner ring of the ratchet wheel 40 and the driving sprocket 10. When the additional brake brakes, because the ratchet wheel 40 bears radial impact, if the inner ring of the ratchet wheel 40 is in direct contact fit with the drive sprocket 10, abrasion can occur between the ratchet wheel 40 and the drive sprocket 10 and abrasion pits or burrs are generated, and once the burrs are generated by friction between the ratchet wheel 40 and the drive sprocket 10, the braking torque of the additional brake can be changed and the braking stability of the additional brake is influenced. The self-lubricating bearing 80 is formed by sintering powder metallurgy, the strength is high, carbon powder with a low friction coefficient is coated on the surfaces of the inner ring and the outer ring, the ratchet wheel 40 can rotate in the circumferential direction inside the driving chain wheel 10 smoothly, and the braking stability of the additional brake is greatly improved.

It should be noted that, because the notch of the second oil blocking groove 13 is disposed downward facing the ratchet 40, the braking pressure plate 50, the elastic pressing member 60 and the bolt member 70 are all located inside the edge line of the second oil blocking groove 13. This can prevent the lubricating oil dripping from the second sufficient groove from dripping onto the surface of the ratchet 40, the driving brake pressure plate 50, or the like, thereby increasing the risk of bleeding onto the surface of the friction plate 30.

In addition to the above, the present application also provides an escalator or moving walkway including an additional brake as described in any of the above embodiments.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.