Carrier roller device capable of preventing bearing from being blocked

Abstract

The utility model discloses and provides a carrier roller device for preventing bearing jamming, which comprises a fixing plate and a carrier roller, the fixing plate is provided with a 7-shaped track groove, a bearing is embedded in the carrier roller, a carrier roller shaft is fixedly connected in the bearing, one end of the carrier roller shaft penetrates through the track groove, and the other end of the carrier roller shaft penetrates through the track groove. One end, far away from the carrier roller wheel, of the carrier roller wheel shaft is fixedly connected with an extension spring, one end, far away from the carrier roller wheel shaft, of the extension spring is connected with the fixing plate, the side face of the carrier roller wheel shaft is fixedly connected with a bearing jamming triggering mechanism, and one end of the bearing jamming triggering mechanism is embedded in the extension spring. The extension spring is limited through the bearing jamming triggering mechanism, when the bearing is jammed, the bearing jamming triggering mechanism is triggered and makes contact with limitation on the extension spring, the extension spring pulls the carrier roller wheel to move along the track of the track groove, the carrier roller wheel sinks to leave the hand strap, and the situation that the hand strap is abraded due to long-term friction between the carrier roller wheel and the hand strap is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of idler wheels, and more particularly to an anti-bearing jamming idler wheel device. Background Art

[0002] An idler wheel device is provided on an escalator or a moving walkway. The idler wheel device is used for limiting and guiding the handrail belt. During normal use, the idler wheel rotates as the handrail belt moves. At this time, the friction between the idler wheel and the handrail belt is small, and the wear of the handrail belt can be ignored. However, if the idler wheel bearing is jammed and the idler wheel cannot rotate, the friction between the handrail belt and the idler wheel increases, and the surface of the handrail belt is worn out due to long-term friction. Utility Model Content

[0003] The present disclosure provides an anti-bearing jamming idler wheel device to solve one of the technical problems recognized by the inventors.

[0004] The present disclosure provides an anti-bearing jamming idler wheel device, including: a fixing plate and an idler wheel. A "7"-shaped track groove is formed on the fixing plate. A bearing is embedded inside the idler wheel. A roller shaft is fixedly connected inside the bearing. One end of the roller shaft penetrates through the track groove. A tension spring is fixedly connected to the end of the roller shaft away from the idler wheel. The end of the tension spring away from the roller shaft is connected to the fixing plate. A bearing jamming trigger mechanism is fixedly connected to the side of the roller shaft. One end of the bearing jamming trigger mechanism is embedded in the tension spring.

[0005] Preferably, the bearing jamming trigger mechanism includes a trigger member, a spring box body, a limiting block, and a compression spring. The spring box body is embedded in the side of the roller shaft. The trigger member is embedded in the roller shaft. One end of the trigger member is arranged inside the spring box body. A movable plate is fixedly connected to the end of the trigger member located inside the spring box body. At least one compression spring is arranged inside the spring box body. Two ends of the compression spring respectively abut against the inside of the spring box body and the movable plate. One end of the limiting block is arranged inside the spring box body and abuts against the side of the trigger member close to the trigger member. The other end of the limiting block extends to the track groove. A limiting groove is formed at the position of the track groove corresponding to the limiting block. The limiting block is clamped in the limiting groove. A strip-shaped opening allowing the limiting block to move is formed on the side of the spring box body. A limiting column is fixedly connected to the side of the limiting block. The limiting column penetrates through the track groove and is embedded in the tension spring.

[0006] Preferably, the trigger member is a heat-melting member.

[0007] Preferably, a sheet metal part is integrally formed on the side surface of the fixing plate, and fixing holes are formed in the sheet metal part.

[0008] Preferably, it further includes a guiding slider. An installation hole is formed in the upper part of the fixing plate. The installation hole is fixedly connected with a connecting plate. The guiding slider is detachably connected to the bottom of the connecting plate, and the guiding slider is arranged above the idler wheel.

[0009] Preferably, adjusting holes are formed in the connecting plate, and the guiding slider is fixedly connected to the adjusting holes through fixing bolts.

[0010] The beneficial effect of the present disclosure mainly lies in that: in the present utility model, the stretching spring is restricted by the bearing jamming trigger mechanism. When the bearing jams, the bearing jamming trigger mechanism is triggered, and the restriction on the stretching spring is released. The stretching spring pulls the idler wheel to move along the trajectory of the track groove, so that the idler wheel sinks and leaves the handrail belt, avoiding the wear of the handrail belt caused by the long-term friction between the idler wheel and the handrail belt.

[0011] It should be understood that both the foregoing general description and the following detailed description are for the purpose of illustration and example only and are not necessarily limiting to the present disclosure. The accompanying drawings incorporated in and constituting a part of this specification illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 Schematic three-dimensional structure of the idler wheel device according to an embodiment of the present disclosure Figure 1 ;

[0014] Figure 2 Schematic three-dimensional structure of the idler wheel device according to an embodiment of the present disclosure Figure 2 ;

[0015] Figure 3 Schematic cross-sectional structure diagram of the idler wheel device according to an embodiment of the present disclosure;

[0016] Figure 4 Schematic installation structure diagram of the bearing jamming trigger mechanism according to an embodiment of the present disclosure;

[0017] Figure 5 Schematic structure diagram of the fixing plate according to an embodiment of the present disclosure;

[0018] Figure 6 Schematic cross-sectional structure diagram of the bearing jamming trigger mechanism according to an embodiment of the present disclosure;

[0019] Figure 7 Schematic diagram of the usage state of the idler wheel device according to an embodiment of the present disclosure;

[0020] Icons: 100 - idler wheel device; 1 - fixing plate; 11 - track groove; 12 - limiting groove; 13 - sheet metal part; 131 - fixing hole; 14 - mounting hole; 2 - idler wheel; 21 - idler wheel shaft; 3 - bearing; 4 - bearing jamming trigger mechanism; 41 - trigger part; 42 - spring box; 43 - movable plate; 44 - compression spring; 45 - limiting block; 46 - limiting post; 5 - tension spring; 61 - connecting plate; 611 - adjusting hole; 62 - guiding slider; 63 - fixing bolt. Detailed implementation manners

[0021] Next, the technical solutions of the present disclosure will be described clearly and completely with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present disclosure.

[0022] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without making creative efforts shall fall within the protection scope of the present disclosure.

[0023] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present disclosure. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0024] In the description of the present disclosure, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0025] Embodiment

[0026] As Figures 1-6As shown in the figure, this embodiment provides a device 100 for preventing bearing 3 from jamming the idler wheel, which includes a fixing plate 1 and an idler wheel 2. The fixing plate 1 is used to install the idler wheel 2 and fix it on an escalator or a moving walkway. A "7"-shaped track groove 11 is formed on the surface of the fixing plate 1. A bearing 3 is embedded inside the idler wheel 2, and a roller shaft 21 is fixedly connected inside the bearing 3. One end of the roller shaft 21 penetrates through the track groove 11. A tension spring 5 is fixedly connected to the end of the roller shaft 21 away from the idler wheel 2. The end of the tension spring 5 away from the roller shaft 21 is connected to the fixing plate 1. A bearing jamming trigger mechanism 4 is fixedly connected to the side of the roller shaft 21. One end of the bearing jamming trigger mechanism 4 is embedded in the tension spring 5. The bearing jamming trigger mechanism 4 is used to limit the contraction of the tension spring 5. When the bearing 3 jams and the bearing jamming trigger mechanism 4 is triggered, the restriction on the tension spring 5 is released. At this time, the tension spring 5 contracts and pulls the roller shaft 21 to move along the direction of the track groove 11. When it moves to the vertical turning point of the track groove 11, the roller shaft 21 falls due to gravity. At this time, the idler wheel 2 falls synchronously, so that the idler wheel 2 leaves the handrail belt, avoiding continuous friction between the idler wheel 2 and the handrail belt and causing wear of the handrail belt.

[0027] Specifically, the bearing jamming trigger mechanism 4 includes a trigger 41, a spring box body 42, a limit block 45 and a compression spring 44. The spring box body 42 is embedded in the side surface of the roller shaft 21. The trigger 41 is embedded in the roller shaft 21. One end of the trigger 41 is inserted into the spring box body 42. A movable plate 43 is fixedly connected to the end of the trigger 41 located inside the trigger box. At least one compression spring 44 is arranged in the spring box body 42. In this embodiment, the number of compression springs 44 is two. The two ends of the compression spring 44 are respectively abutted against the inside of the spring box body 42 and the movable plate 43. One end of the limit block 45 is arranged in the spring box body 42 and abutted against the side of the trigger 41 close to the trigger 41. The other end of the limit block 45 extends to the track groove 11. A limit groove 12 is opened at the position of the track groove 11 corresponding to the limit block 45. The limit block 45 is clamped in the limit groove 12. A strip-shaped opening allowing the limit block 45 to move is opened on the side surface of the spring box body 42. A limit post 46 is fixedly connected to the side surface of the limit block 45. The limit post 46 penetrates through the track groove 11 and is embedded in the tension spring 5. In this embodiment, the trigger 41 is a heat-melting part. The heat-melting part of this embodiment is made of paint grease or paraffin, and the melting point is 46-60°C. The limit post 46 is inserted into the middle of the tension spring 5, so that the tension spring 5 cannot contract. When the bearing 3 is jammed, at this time the roller 2 cannot rotate, and the friction between the roller 2 and the handrail belt causes heat generation. The heat is transmitted to the trigger 41 through the bearing 3 and the roller shaft 21, resulting in the melting of the trigger 41. At this time, the movable plate 43 loses the restriction of the trigger 41, and the compression spring 44 pushes the movable plate 43 to move, driving the limit block 45 to move. The limit block 45 drives the limit post 46 to leave the tension spring 5. At this time, the tension spring 5 pulls the roller shaft 21 to move in the track groove 11. When moving to the vertical turning point of the track groove 11, the roller shaft 21 falls with gravity. At this time, the roller 2 synchronously falls, so that the roller 2 leaves the handrail belt, avoiding the continuous friction between the roller 2 and the handrail belt from causing wear of the handrail belt.

[0028] Further, a sheet metal part 13 is integrally formed on the side surface of the fixing plate 1, and a fixing hole 131 is opened on the sheet metal part 13. The fixing plate 1 is fixedly installed on the escalator or moving walk by means of the sheet metal part 13 structure through bolts.

[0029] In one embodiment, a guiding slider 62 is further included. An installation hole 14 is opened in the upper part of the fixing plate 1. A connecting plate 61 is fixedly connected to the installation hole 14. The guiding slider 62 is detachably connected to the bottom of the connecting plate 61. The guiding slider 62 is arranged above the roller 2. The surface of the roller 2 is of an arc structure and has a certain limiting effect, such as Figure 7As shown, when installed in the middle section of the escalator and moving walkway, it is not necessary to install the guiding slider 62. It is only necessary to install the guiding slider 62 on the first and last idler wheel devices 100 in the middle section, which effectively reduces the total cost of the escalator and moving walkway.

[0030] Furthermore, adjustment holes 611 are formed in the connecting plate 61, and the guiding slider 62 is fixedly connected to the adjustment holes 611 through fixing bolts 63. By changing the position of the fixing bolts 63 in the adjustment holes 611, the position of the guiding slider 62 can be adjusted so that the guiding slider 62 corresponds to the position of the idler wheel 2.

[0031] The working principle of the present utility model: When the bearing 3 is jammed, at this time the idler wheel 2 cannot rotate, and the friction between the idler wheel 2 and the handrail belt causes heat generation. The heat is transferred to the trigger member 41 through the bearing 3 and the idler wheel shaft 21, resulting in the melting of the trigger member 41. At this time, the movable plate 43 loses the restriction of the trigger member 41, and the compression spring 44 pushes the movable plate 43 to move, driving the limit block 45 to move. The limit block 45 drives the limit post 46 to leave the tension spring 5. At this time, the tension spring 5 pulls the idler wheel shaft 21 to move in the track groove 11. When moving to the vertical turning point of the track groove 11, the idler wheel shaft 21 drops due to gravity. At this time, the idler wheel 2 drops synchronously, so that the idler wheel 2 leaves the handrail belt, avoiding the wear of the handrail belt caused by the continuous friction between the idler wheel 2 and the handrail belt.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A device for preventing bearing jamming of a idler wheel, characterized in that, Including: A fixed plate and a roller wheel. A "7"-shaped track groove is formed on the fixed plate. A bearing is embedded inside the roller wheel. A roller wheel shaft is fixedly connected inside the bearing. One end of the roller wheel shaft penetrates through the track groove. A tension spring is fixedly connected to the end of the roller wheel shaft away from the roller wheel. The end of the tension spring away from the roller wheel shaft is connected to the fixed plate. A bearing blocking trigger mechanism is fixedly connected to the side of the roller wheel shaft. One end of the bearing blocking trigger mechanism is embedded in the tension spring.

2. The anti-bearing jamming idler wheel device according to claim 1, characterized in that, The bearing blocking trigger mechanism includes a trigger piece, a spring box body, a limiting block and a compression spring. The spring box body is embedded in the side of the roller wheel shaft. The trigger piece is embedded in the roller wheel shaft. One end of the trigger piece is arranged inside the spring box body. A movable plate is fixedly connected to the end of the trigger piece located inside the spring box body. At least one compression spring is arranged inside the spring box body. The two ends of the compression spring are respectively abutted against the inside of the spring box body and the movable plate. One end of the limiting block is arranged inside the spring box body and abutted against the side of the trigger piece close to the trigger piece. The other end of the limiting block extends to the track groove. A limiting groove is formed at the position of the track groove corresponding to the limiting block. The limiting block is clamped in the limiting groove. A strip-shaped opening allowing the limiting block to move is formed on the side of the spring box body. A limiting column is fixedly connected to the side of the limiting block. The limiting column penetrates through the track groove and is embedded in the tension spring.

3. The anti-bearing jamming idler wheel device according to claim 2, characterized in that, The trigger piece is a heat-melting piece.

4. The anti-bearing jamming idler wheel device according to claim 1, characterized in that A sheet metal part is integrally formed on the side of the fixed plate. A fixing hole is formed on the sheet metal part.

5. The anti-bearing jamming idler wheel device according to claim 1, characterized in that, It further includes a guiding slider. An installation hole is formed in the upper part of the fixed plate. A connecting plate is fixedly connected to the installation hole. The guiding slider is detachably connected to the bottom of the connecting plate. The guiding slider is arranged above the roller wheel.

6. The anti-bearing jamming idler wheel device according to claim 5, characterized in that, An adjusting hole is formed on the connecting plate. The guiding slider is fixedly connected to the adjusting hole through a fixing bolt.

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