Escalator and its additional brake

Abstract

The present application discloses an escalator and an additional brake thereof, wherein the additional brake of the escalator comprises: a ratchet wheel rotatably mounted on the escalator truss; a sprocket wheel rotating with the ratchet wheel and cooperating with the step chain; a ratchet wheel rotatably mounted on the escalator truss and cooperating with the ratchet wheel to brake the escalator; and a driving mechanism receiving a signal from the escalator control system to drive the ratchet wheel to move. The additional brake provided by the present application is easy to maintain, has low processing requirements, and is suitable for escalators with large lifting heights.

Description

Technical Field

[0001] The present application relates to the technical field of escalators, and in particular to an escalator and an additional brake thereof. Background Art

[0002] The additional brake structure currently used in escalators generally sets the additional brake on the main drive component at the top of the escalator. When the escalator uses the additional brake, all the forces will act on the main drive, which requires very high strength of the main drive component. At the same time, the truss used to fix the main drive also needs special reinforcement design.

[0003] The additional brake structure is provided on the main drive, which increases the lateral size of the main drive, so that the lateral space is reduced after the main drive is installed on the truss, causing inconvenience and difficulty in the future maintenance of the escalator.

[0004] The brake friction pad currently used in the auxiliary brake is installed on the main drive. The friction pad has a large area, high requirements on the processing technology of the main drive parts, and the output brake friction force is difficult to control.

[0005] For the additional brake used on the super-high escalator, if the traditional solution is adopted, the above difficulties and shortcomings will become more obvious. Summary of the invention

[0006] Based on this, in order to solve the problems existing in the current auxiliary brake, an auxiliary brake with low strength requirement, convenient maintenance, low processing technology requirement and stable output braking force is provided.

[0007] Additional brakes for escalators, including:

[0008] Turning a ratchet wheel mounted on the escalator truss;

[0009] a brake sprocket which rotates with the ratchet wheel and cooperates with the step chain;

[0010] A ratchet pawl rotatably arranged on the escalator truss and cooperating with the ratchet wheel to brake the escalator;

[0011] A driving mechanism receives a signal from an escalator control system to drive the ratchet to move.

[0012] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0013] Optionally, a rotating shaft is fixed on the escalator truss, and the ratchet is rotatably sleeved on the rotating shaft.

[0014] Optionally, the ratchet comprises:

[0015] The connecting disk sleeved on the rotating shaft is rotated, and the brake sprocket and the connecting disk rotate synchronously;

[0016] A ratchet body which is arranged around the outer periphery of the connecting plate and has ratchet teeth;

[0017] The friction plate is located between the connecting plate and the ratchet body.

[0018] Optionally, the ratchet body is provided with a mounting groove facing the connecting disk, the connecting disk is provided with a connecting portion inserted into the mounting groove, and the friction plate is located between the connecting portion and an adjacent wall of the mounting groove.

[0019] Optionally, the groove bottom of the mounting groove is arranged around the outer periphery of the connecting portion, and a bushing is provided between the groove bottom of the mounting groove and the connecting portion.

[0020] Optionally, the ratchet body comprises:

[0021] A first pressure plate and a second pressure plate clamped on both axial sides of the connecting portion, wherein the friction plate is located between the connecting portion and the first pressure plate, and between the connecting portion and the second pressure plate;

[0022] A screw rod passing through the first pressing plate and the second pressing plate;

[0023] A compression spring sleeved on the screw rod;

[0024] A nut that cooperates with the screw thread and compresses the compression spring;

[0025] The annular portion is provided with ratchet teeth, one of the first pressing plate and the second pressing plate is an integral structure with the annular portion, and the first pressing plate, the second pressing plate and the annular portion surround the installation groove.

[0026] Optionally, the surfaces of the first pressing plate and the second pressing plate facing away from the connecting portion are flush with the surfaces of the corresponding side connecting plates.

[0027] Optionally, the brake sprocket is detachably connected to the connecting plate.

[0028] The present application also provides an escalator equipped with the above-mentioned additional brake, wherein there is at least one pair of the additional brakes, each pair of the additional brakes is arranged along the running direction of the escalator, and the additional brakes belonging to the same pair are distributed on both sides in the width direction of the escalator, and the brake sprocket of the additional brake cooperates with the adjacent step chain.

[0029] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0030] Optionally, a linkage member is provided between the pawls on the same side in the width direction of the escalator, and the driving mechanism receives a signal from the escalator control system to drive the linkage member to move.

[0031] The additional brake provided in the present application is easy to maintain, has low processing requirements, and is suitable for escalators with large lifting heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of one embodiment of the escalator auxiliary brake of the present application;

[0033] Figure 2 for Figure 1 A magnified view of part A in FIG.

[0034] Figure 3 This is a schematic diagram of one embodiment of the escalator auxiliary brake of the present application (non-braking state);

[0035] Figure 4 for Figure 3 A magnified view of part B in FIG.

[0036] Figure 5 This is a schematic diagram of one embodiment of the escalator auxiliary brake of the present application (braking state);

[0037] Figure 6 for Figure 5 The enlarged view of the C part in FIG.

[0038] Figure 7 A cross-sectional view of one embodiment of the escalator auxiliary brake of the present application;

[0039] Figure 8 A schematic diagram of a brake sprocket and a ratchet wheel in one embodiment of the escalator auxiliary brake of the present application;

[0040] Fig. 9 A side view of a brake sprocket and a ratchet wheel in one embodiment of an escalator auxiliary brake of the present application;

[0041] Fig.10 A rear view of a brake sprocket and a ratchet wheel in one embodiment of the escalator auxiliary brake of the present application;

[0042] Fig.11 A cross-sectional view of a brake sprocket and a ratchet wheel in one embodiment of an escalator auxiliary brake of the present application;

[0043] Fig.12 for Fig.11 Enlarged view of part D in .

[0044] In the figure: 1. ratchet; 11. connecting plate; 12. ratchet body; 121. first pressure plate; 122. second pressure plate; 123. screw; 124. nut; 125. compression spring; 126. pressure seat; 127. annular portion; 2. pawl; 3. linkage member; 4. brake sprocket; 5. truss; 6. step chain; 7. rotating shaft; 8. friction plate; 9. bushing; 10. connecting portion. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] In order to better describe and illustrate the embodiments of the present application, reference may be made to one or more drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of the invention of the present application, any of the currently described embodiments or preferred methods.

[0047] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0049] See also Figure 1 , Figure 2 , Figure 8 As shown, an additional brake of an escalator comprises:

[0050] Rotate the ratchet 1 mounted on the escalator truss 5;

[0051] A brake sprocket 4 that rotates with the ratchet 1 and cooperates with the step chain 6;

[0052] A ratchet pawl 2 rotatably arranged on the escalator truss 5 and cooperating with the ratchet 1 to brake the escalator;

[0053] A driving mechanism that receives the escalator control system signal to drive the pawl 2 to move.

[0054] The escalator described in this application includes an automatic escalator and a moving walkway.

[0055] The additional brake provided in the present application is installed on the inclined section or horizontal section of the escalator truss 5, preferably on the inclined section of the escalator truss 5. The additional brake does not directly act on the main drive of the escalator, reducing the strength requirements for the main drive. At the same time, the escalator truss 5 at the installation location does not require special reinforcement.

[0056] The step chain 6 cooperates with the brake sprocket 4, which means that the step chain 6 and the brake sprocket 4 are meshed with each other for chain transmission, that is, the step chain 6 and the brake sprocket 4 move synchronously, and when one of them stops moving, the other also stops moving, and the braking force is transmitted to the step chain 6 through the brake sprocket 4.

[0057] During the normal operation of the escalator, the step chain 6 drives the brake sprocket 4 to rotate, and the brake sprocket 4 drives the ratchet 1 to rotate. When the escalator needs to be stopped, the rotation of the ratchet 1 is stopped by the action of the pawl 2, and the brake sprocket 4 stops rotating along with the ratchet 1, thereby stopping the movement of the step chain 6 and stopping the escalator.

[0058] The braking force of the additional brake acts on the step chain 6, thereby stopping the movement of the step chain 6 and thus stopping the operation of the escalator.

[0059] See also Figure 7 , Fig. 9 , Fig.11 As shown, a rotating shaft 7 is fixed on the escalator truss 5, and the ratchet 1 is rotatably sleeved on the rotating shaft 7. A connecting seat is provided at one end of the rotating shaft 7, and the connecting seat and the truss 5 are fixed by bolts, and the ratchet 1 and the brake sprocket 4 are rotatably mounted on the rotating shaft 7.

[0060] The ratchet 1 rotates with the brake sprocket 4. When the pawl 2 moves, the ratchet 1 stops rotating. In order to avoid the escalator from stopping suddenly, a buffer structure is provided between the ratchet 1 and the brake sprocket 4. That is, after the ratchet 1 stops rotating, the brake sprocket 4 reaches a stopped state after a certain period of time. Figure 7 , Fig.11 , Fig.12 As shown, in one embodiment, the ratchet 1 comprises:

[0061] The connecting disk 11 sleeved on the rotating shaft 7 is rotated, and the brake sprocket 4 and the connecting disk 11 rotate synchronously;

[0062] A ratchet body 12 arranged around the outer periphery of the connecting plate 11 and having ratchet teeth;

[0063] The friction plate 8 is located between the connecting plate 11 and the ratchet body 12 .

[0064] The connecting disk 11 and the rotating shaft 7 are rotationally matched through the bearing, and the pawl 2 acts on the ratchet body 12. When the pawl 2 moves, the ratchet body 12 stops rotating, and the ratchet body 12 stops the connecting disk 11 through the friction plate 8. Specifically, when the ratchet body 12 stops rotating, the friction plate 8 gradually stops rotating under the friction force of the ratchet body 12, and the friction plate 8 drives the connecting disk 11 to stop rotating through the friction force.

[0065] The connection structure between the connecting plate 11 and the ratchet body 12 needs to be stable. When the ratchet body 12 and the connecting plate 11 rotate or stop rotating, no unexpected relative slippage occurs between the connecting plate 11 and the ratchet body 12. Figure 7 , Fig.11 , Fig.12 As shown, in one embodiment, the ratchet body 12 is provided with a mounting groove facing the connecting disk 11, the connecting disk 11 is provided with a connecting portion 10 inserted into the mounting groove, and the friction plate 8 is located between the connecting portion 10 and the adjacent mounting groove wall.

[0066] The connecting portion 10 is inserted into the mounting groove to play the role of axial limiting, that is, during the rotation process, the connecting disk 11 and the ratchet body 12 have no relative slip in the axial direction. At the same time, the friction plate 8 stops the rotation of the connecting disk 11 when the ratchet body 12 stops rotating.

[0067] In order to prevent the jamming problem caused by the asynchronous rotation of the connecting disk 11 and the ratchet body 12, see Fig.11 , Fig.12 As shown, in one of the embodiments, the groove bottom of the installation groove is arranged around the outer periphery of the connecting portion 10 , and a bushing 9 is provided between the groove bottom of the installation groove and the connecting portion 10 .

[0068] The bushing 9 is made of polymer material, which effectively reduces the friction between the connecting portion 10 and the bottom of the installation groove.

[0069] In order to achieve a fixed connection between the connecting plate 11 and the ratchet body 12 and transmit the braking force through the friction plate 8, see Fig.11 , Fig.12 As shown, in one embodiment, the ratchet body 12 includes:

[0070] A first pressure plate 121 and a second pressure plate 122 are clamped on both axial sides of the connecting portion 10, and the friction plate 8 is located between the connecting portion 10 and the first pressure plate 121, and between the connecting portion 10 and the second pressure plate 122;

[0071] A screw 123 passing through the first pressing plate 121 and the second pressing plate 122;

[0072] A compression spring 125 sleeved on the screw rod 123;

[0073] A nut 124 that is threadably engaged with the screw rod 123 and compresses the compression spring 125;

[0074] The annular portion 127 with ratchet teeth, one of the first pressing plate 121 and the second pressing plate 122 and the annular portion 127 are an integral structure, and the first pressing plate 121, the second pressing plate 122 and the annular portion 127 form a mounting groove.

[0075] There are two friction plates 8, which are respectively located between the connecting portion 10 and the first pressure plate 121, and between the connecting portion 10 and the second pressure plate 122. The friction plates 8 on both sides can ensure sufficient friction force output, improve braking efficiency, and ensure braking reliability.

[0076] The two sides of the compression spring 125 respectively press against the nut 124 and the adjacent first pressure plate 121 or the second pressure plate 122. By adjusting the matching position of the nut 124 on the screw rod 123, the compression amount of the compression spring 125 can be adjusted, thereby adjusting the friction force between the friction plate 8 and the adjacent components, that is, adjusting the size of the braking force.

[0077] The compression spring 125 can be a disc spring sleeved on the screw rod 123. The disc spring is used to control the braking force, so that the structure of the additional brake is more compact and easy to maintain.

[0078] The first pressing plate 121 and the second pressing plate 122 are both annular and arranged around the connecting plate 11. Fig.10 As shown, there are multiple screw rods 123 , which are arranged around the rotating shaft 7 , and each screw rod 123 is equipped with a compression spring 125 and a nut 124 .

[0079] The first pressing plate 121 or the second pressing plate 122 is provided with a receiving groove for receiving the compression spring 125 . The screw rod 123 is also sleeved with a pressing seat 126 . One axial side of the pressing seat 126 abuts against the nut 124 , and the other axial side abuts against the compression spring 125 .

[0080] The first pressure plate 121 and the second pressure plate 122 are provided with through mounting holes, the screw 123 is inserted into the mounting holes, and an axial side of the pressure seat 126 is provided with an axial extension section extending into the mounting hole. The corresponding parts of the mounting hole and the axial extension section have a limiting step matching the axial extension section, and the limiting step prevents the compression spring 125 from being over-compressed.

[0081] See also Fig.11 , Fig.12 As shown, the surfaces of the first pressing plate 121 and the second pressing plate 122 facing away from the connecting portion 10 are flush with the surfaces of the corresponding side connecting plates 11 .

[0082] The brake sprocket 4 is fixedly connected to the connecting plate 11, and the two rotate synchronously. Fig.10 , Fig.11As shown, the brake sprocket 4 is detachably connected to the connecting plate 11. The brake sprocket 4 is fixedly connected to the connecting plate 11 by a plurality of bolts arranged in a ring shape, and the bolts are reamed hole bolts to effectively transmit the braking force.

[0083] See also Figure 1 , Figure 3 , Figure 5 As shown, the present application also discloses an escalator equipped with the auxiliary brake, wherein there is at least one pair of the auxiliary brakes, each pair of the auxiliary brakes is arranged along the running direction of the escalator, and the auxiliary brakes belonging to the same pair are distributed on both sides in the width direction of the escalator, and the brake sprocket 4 of the auxiliary brake cooperates with the adjacent step chain 6.

[0084] The number of additional brakes is determined according to different braking force requirements at different lifting heights. The additional brakes are located on both sides of the step chain 6 and are arranged close to the main drive.

[0085] Each additional brake can be provided with a driving mechanism respectively, or only one driving mechanism can be provided on the same side of the escalator to drive all the ratchets 2 to move through the transmission member. Figure 2 , Figure 4 , Figure 6 As shown, in one embodiment, a linkage member 3 is provided between the pawls 2 on the same side in the width direction of the escalator, and the driving mechanism receives a signal from the escalator control system to drive the linkage member 3 to move.

[0086] The linkage member 3 is a linkage rod hinged to each pawl 2. The movement of the linkage rod can drive the pawl 2 to move synchronously, and the ratchet 1 matched with the pawl 2 stops moving. By stopping multiple ratchets 1 at the same time, the step chain 6 is stopped.

[0087] The driving mechanism can adopt an electromagnetic push rod, and the push rod of the electromagnetic push rod moves synchronously with the linkage member 3, see Figure 4 As shown, when the escalator is powered on and running normally, the electromagnet is attracted, driving the linkage 3 to lift up, the pawl 2 is disengaged from the ratchet 1, and the ratchet 1 rotates with the brake sprocket 4, see Figure 6 As shown, when the escalator is abnormal, the electromagnet is released, driving the linkage member 3 to descend, the pawl 2 engages with the ratchet 1, the ratchet 1 stops rotating, the brake sprocket 4 stops rotating accordingly, and the step chain 6 meshing with the brake sprocket 4 stops rotating.

[0088] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] 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 attached claims.

Claims

1. An escalator, characterized in that: At least two pairs of additional brakes are installed, each pair of additional brakes is arranged along the running direction of the escalator, and the additional brakes of the same pair are distributed on both sides of the width direction of the escalator. The additional brakes are installed on the inclined section of the escalator truss and do not directly act on the main drive of the escalator. Each additional brake includes: Turning a ratchet wheel mounted on the escalator truss; a sprocket wheel rotating with the ratchet wheel and cooperating with the step chain, the sprocket wheel cooperating with the adjacent step chain; A ratchet pawl rotatably arranged on the escalator truss and cooperating with the ratchet wheel to brake the escalator, and a linkage member is arranged between the ratchet pawls on the same side in the width direction of the escalator; A driving mechanism receives a signal from the escalator control system to drive the pawl to move, and the driving mechanism receives a signal from the escalator control system to drive the linkage to move.

2. The escalator according to claim 1, characterized in that A rotating shaft is fixed on the escalator truss, and the ratchet wheel is rotatably sleeved on the rotating shaft.

3. The escalator according to claim 2, characterized in that The ratchet comprises: The connecting disk sleeved on the rotating shaft is rotated, and the brake sprocket and the connecting disk rotate synchronously; A ratchet body which is arranged around the outer periphery of the connecting plate and has ratchet teeth; The friction plate is located between the connecting plate and the ratchet body.

4. The escalator according to claim 3, characterized in that The ratchet body is provided with a mounting groove facing the connecting disk, the connecting disk is provided with a connecting portion inserted into the mounting groove, and the friction plate is located between the connecting portion and the adjacent mounting groove wall.

5. The escalator according to claim 4, characterized in that The groove bottom of the installation groove is arranged around the outer periphery of the connecting portion, and a bushing is provided between the groove bottom of the installation groove and the connecting portion.

6. The escalator according to claim 4, characterized in that The ratchet body comprises: A first pressure plate and a second pressure plate clamped on both axial sides of the connecting portion, wherein the friction plate is located between the connecting portion and the first pressure plate, and between the connecting portion and the second pressure plate; A screw rod passing through the first pressing plate and the second pressing plate; A compression spring sleeved on the screw rod; A nut that cooperates with the screw thread and compresses the compression spring; The annular portion is provided with ratchet teeth, one of the first pressing plate and the second pressing plate is an integral structure with the annular portion, and the first pressing plate, the second pressing plate and the annular portion surround the mounting groove.

7. The escalator according to claim 6, characterized in that The surfaces of the first pressing plate and the second pressing plate facing away from the connecting portion are flush with the surfaces of the corresponding side connecting plates.

8. The escalator according to claim 3, characterized in that: The sprocket is detachably connected to the connecting plate.

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