Protective device suitable for rail-mounted gantry crane cart cable and rail-mounted gantry crane boarding platform using same

Abstract

The utility model provides a protection device suitable for a rail-mounted gantry crane cart cable. The protection device comprises a cable anti-scraping mechanism, an elastic telescopic rod, a guide sliding pair mechanism and an inductive switch, the cable anti-scraping mechanism comprises a plurality of cable guide wheels and a wheel body mounting frame for mounting the cable guide wheels; the wheel body mounting frame is mounted on one side of the bottom of a cart of the automatic rail-mounted gantry crane; the elastic telescopic rod is positioned in the transverse front of the cable anti-scraping mechanism; one end of the elastic telescopic rod is pivoted with the wheel body mounting frame or a first mounting fixing point of the cart; the rod body of the elastic telescopic rod is used for blocking relatively moving cart cables; the guiding sliding pair mechanism is used for guiding and limiting the other end of the elastic telescopic rod in the sliding stroke of the elastic telescopic rod. The utility model further provides a rail-mounted gantry boarding platform which comprises two protection devices suitable for the rail-mounted gantry cart cable and a boarding pedal. According to the utility model, the rail-mounted gantry crane cart cable can be safely guided and protected, and the risk that the cart cable is hooked and dragged after going out of the groove can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail hoist trolley cable safety protection technical field, concretely relates to the protection device suitable for rail hoist trolley cable and the rail hoist machine landing platform with it. BACKGROUND

[0002] In the automation operation of the port wharf, the automatic rail hoist plays a key role. In its application scene, the setting of the boarding cable guide wheel aims to guide and protect the smooth movement of the trolley cable. However, in the prior art, when the trolley cable is loosened and out of the groove due to improper operation or mechanical failure, the out-of-groove trolley cable may interfere with the cable guide wheels on both sides of the boarding port during the cable collection process. In particular, when the out-of-groove trolley cable is too high, it is easy to hook with the boarding cable guide wheel and its bracket, resulting in dragging and even breaking. At present, there is no special solution to this problem, and only relies on manual monitoring by maintenance personnel, which is difficult to fundamentally solve the risk of trolley cable being dragged. The prior art lacks an effective device to prevent the trolley cable from being hooked with the boarding cable guide wheel after being loosened and out of the groove, thereby avoiding the risk of the trolley cable being dragged and broken. SUMMARY

[0003] Therefore, it is necessary to propose a protection device suitable for rail hoist trolley cable and a rail hoist boarding platform with it to overcome the shortcomings in the background art and solve the following technical problems:

[0004] How to safely guide and protect the rail hoist trolley cable and reduce the risk of the trolley cable being hooked and dragged after being out of the groove.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a protection device suitable for rail hoist trolley cable, comprising:

[0007] A cable scratch prevention mechanism; the cable scratch prevention mechanism comprises a plurality of cable guide wheels and a wheel body mounting rack for mounting each cable guide wheel; the wheel body mounting rack is mounted on one side of the bottom of the trolley of the automatic rail hoist;

[0008] An elastic telescopic rod; the elastic telescopic rod is located on the transverse front side of the cable scratch prevention mechanism, and the moving direction of the trolley is transverse; one end of the elastic telescopic rod is pivotally connected with a first mounting fixed point of the wheel body mounting rack or the trolley; the rod body of the elastic telescopic rod is used for blocking the relative movement of the trolley cable;

[0009] The guiding sliding pair mechanism is fixedly connected with a second mounting fixed point of the trolley; the other end of the elastic telescopic rod is hingedly connected with a movable end of the guiding sliding pair mechanism; the guiding sliding pair mechanism is used for guiding and limiting the other end of the elastic telescopic rod in a sliding stroke of the elastic telescopic rod;

[0010] The inductive switch is not triggered when the other end of the elastic telescopic rod is located at a detection position in the sliding stroke of the elastic telescopic rod, and the inductive switch is triggered when the other end of the elastic telescopic rod is located at another detection position in the sliding stroke of the elastic telescopic rod.

[0011] Further, the guiding sliding pair mechanism comprises a guiding plate provided with a guiding groove and a guiding column body embedded in the guiding groove; one end of the guiding column body is hingedly connected with the other end of the elastic telescopic rod; when the elastic telescopic rod swings due to the action of the cable force of the trolley and the other end of the elastic telescopic rod moves to the other detection position in the sliding stroke of the elastic telescopic rod, the other end of the guiding column body triggers the inductive switch.

[0012] Further, the other end of the guiding column body triggers the inductive switch through a metal block connected with the other end of the guiding column body.

[0013] Further, the elastic telescopic rod comprises a first sleeve rod, a second sleeve rod and a compression spring; the first sleeve rod and the second sleeve rod are sequentially sleeved with each other in a head-to-tail mode, the compression spring is embedded in one of the sleeve rods, and the two ends of the compression spring abut against the first sleeve rod and the second sleeve rod respectively; one end of the first sleeve rod away from the second sleeve rod is pivotally connected with the wheel body mounting frame or a first mounting fixed point of the trolley, and one end of the second sleeve rod away from the first sleeve rod is hingedly connected with the movable end of the guiding sliding pair mechanism.

[0014] Further, the wheel end of the cable guide wheel in contact with the cable of the trolley is away from the trolley track; the wheel end of the cable guide wheel in contact with the cable of the trolley is used for preventing the cable of the trolley from being damaged when the cable is extruded from one side of the longitudinal direction towards the direction of the trolley track; the rod body of the elastic telescopic rod is used for blocking the cable of the trolley extruded from one side of the transverse direction towards the direction of the wheel body mounting frame.

[0015] Further, one end of the elastic telescopic rod is pivotally connected with the wheel body mounting frame, the rod body of the elastic telescopic rod is arranged horizontally, and the included angle between the rod body of the elastic telescopic rod and the transverse movement direction of the cable guide wheel is an obtuse angle.

[0016] Further, one end of the elastic telescopic rod constitutes an origin of a three-dimensional coordinate system; the horizontal and vertical projection plane based on the origin of the three-dimensional coordinate system is parallel to the rod body of the elastic telescopic rod; and the included angle between the rod body of the elastic telescopic rod and the vertical projection plane based on the origin of the three-dimensional coordinate system is an acute angle.

[0017] The utility model further provides a track crane climbing platform, which comprises:

[0018] Two protection devices for the cable of the track crane trolley as claimed in any one of the above;

[0019] One of the protection devices for the cable of the track crane trolley is installed on the lateral side of the boarding platform, and the other protection device for the cable of the track crane trolley is installed on the lateral side of the boarding platform.

[0020] Further, the wheel body mounting frame of one of the protection devices for the cable of the track crane trolley is installed on the lateral side of the boarding platform, and the wheel body mounting frame of the other protection device for the cable of the track crane trolley is installed on the lateral side of the boarding platform.

[0021] Further, the wheel end of the cable guide wheel in contact with the trolley cable protrudes in the longitudinal direction from the longitudinal side of the boarding platform away from the trolley track.

[0022] The wheel body mounting frame further comprises a baffle plate; the baffle plate is used to transversely block the trolley cable.

[0023] The protection device for the cable of the track crane trolley has the following beneficial effects:

[0024] The protection device for the cable of the track crane trolley can not only safely guide and protect the trolley cable, but also reduce the risk of the trolley cable being hooked and dragged by the cable guide wheel or the wheel body mounting frame after the trolley cable is pulled out of the groove, thereby improving the protection capability of the trolley cable of the track crane, and ensuring the safe and stable operation of the track crane.

[0025] Other advantages, objects and features of the protection device for the cable of the track crane trolley will be illustrated in part through the following description, and will be understood by those skilled in the art through research and practice of the protection device for the cable of the track crane trolley. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a top view of the protection device for the cable of the track crane trolley of the utility model;

[0027] Figure 2 It is a perspective structural schematic view of the protection device for the cable of the track crane trolley of the utility model;

[0028] Figure 3 It is a perspective structural schematic view of another protection device for the cable of the track crane trolley of the utility model;

[0029] Figure 4 It is a perspective structural schematic view of the track crane boarding platform to which the protection device for the cable of the track crane trolley of the utility model is applied;

[0030] Figure 5The utility model discloses a crane cable protection device for track crane trolley is applied to the top view of track crane machine platform of the utility model,

[0031] Figure 6 The utility model discloses a crane cable protection device for track crane trolley is applied to the three -dimensional structure schematic diagram of track crane machine platform of the utility model to the big car cable of one side is prevented and drags the operation,

[0032] Figure 7 The utility model discloses a crane cable protection device for track crane trolley is applied to the three -dimensional structure schematic diagram of track crane machine platform of the utility model to the big car cable of another side is prevented and drags the operation,

[0033] Figure 8 The utility model relates to the partial section view of elastic telescopic rod,

[0034] Mark explanation:

[0035] Cable scratchproof mechanism 1;Cable guide wheel 11;Wheel body mounting frame 12;Elastic telescopic rod 2;Guide sliding pair mechanism 3;Induction switch 4;Guide plate 31;Guide groove 311;Guide column body 32;Metal block 33;First sleeve rod 21;Second sleeve rod 22;Compression spring 23;Boarding pedal 200. Specific embodiment

[0036] In order to make the purpose, technical scheme and advantage of the utility model more clear, the technical scheme of the utility model will be further clearly and completely described below in conjunction with the utility model embodiment. It needs to be explained that the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making the creative labor belong to the range of the utility model protection.

[0037] It needs to be understood that the orientation or position relation that the terms "upper", "lower", "front", "rear", "left", "right" and the like indicate is the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0038] The terms "first", "second", "third", "fourth" and the like are only for the description purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the "first", "second", "third", "fourth" features limited can explicitly or implicitly include one or more features.

[0039] Embodiment 1

[0040] As Figure 1 shown:

[0041] The embodiment proposes a protection device suitable for track crane cable, comprising:

[0042] The cable scratch prevention mechanism 1 comprises a plurality of cable guide wheels 11 and a wheel body mounting frame 12 for mounting each cable guide wheel 11; the wheel body mounting frame 12 is mounted on one side of the bottom of the automatic track crane trolley;

[0043] The elastic telescopic rod 2 is located at the transverse front side of the cable scratch prevention mechanism 1, and the moving direction of the trolley is transverse; one end of the elastic telescopic rod 2 is pivotally connected with a first mounting fixed point of the wheel body mounting frame 12 or the trolley; the rod body of the elastic telescopic rod 2 is used for blocking the relative movement of the trolley cable;

[0044] The guide sliding pair mechanism 3 is fixedly connected with a second mounting fixed point of the trolley at the fixed end; the other end of the elastic telescopic rod 2 is hingedly connected with the movable end of the guide sliding pair mechanism 3; the guide sliding pair mechanism 3 is used for guiding and limiting the other end of the elastic telescopic rod 2 within its sliding stroke;

[0045] The inductive switch 4 is not triggered when the other end of the elastic telescopic rod 2 is located at one detection position of its sliding stroke, and is triggered when the other end of the elastic telescopic rod 2 is located at the other detection position of its sliding stroke.

[0046] Specifically, the inductive switch 4 is used for sensing the action of the elastic telescopic rod 2 and feeding back the trigger signal of the cable out of the slot pushing the elastic telescopic rod 2; the inductive switch 4 is a magnetic inductive switch, a photoelectric sensor, a pressure sensor or an ultrasonic sensor, etc., and is preferably a magnetic inductive switch.

[0047] Embodiment 2

[0048] Embodiment 2 is a further optimized design of embodiment 1;

[0049] As Figures 1-3 shown:

[0050] The guide sliding pair mechanism 3 comprises a guide plate 31 provided with a guide groove 311 and a guide column body 32 embedded in the guide groove 311; one end of the guide column body 32 is hingedly connected with the other end of the elastic telescopic rod 2; when the elastic telescopic rod 2 swings due to the action force of the trolley cable, and the other end of the elastic telescopic rod 2 moves to the other detection position of its sliding stroke, the other end of the guide column body 32 triggers the inductive switch 4.

[0051] Specifically, the guide sliding pair mechanism 3 enables the elastic telescopic rod 2 to adaptively move when the cable touches, forming a resettable swing buffer structure.

[0052] Further optimization, the self-sliding stroke of the other end of the elastic telescopic rod 2 is the length range of the guide groove 311.

[0053] Further optimization, the movable end of the guide sliding pair mechanism 3 is the guide column body 32.

[0054] Embodiment 3

[0055] Embodiment 3 is a further optimized design of Embodiment 1 or Embodiment 2;

[0056] As shown in Figures 1-3 ,

[0057] The other end of the guide column body 32 triggers the inductive switch 4 through a metal block 33 connected with the other end of the guide column body 32.

[0058] Embodiment 4

[0059] Embodiment 4 is a further optimized design of any one of Embodiments 1-3;

[0060] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 8 ,

[0061] The elastic telescopic rod 2 includes a first sleeve rod 21, a second sleeve rod 22 and a compression spring 23; the first sleeve rod 21 and the second sleeve rod 22 are sequentially sleeved with each other in head-to-tail manner, the compression spring 23 is embedded in one of the sleeve rods, and the two ends of the compression spring 23 respectively abut against the first sleeve rod 21 and the second sleeve rod 22; the end of the first sleeve rod 21 away from the second sleeve rod 22 is pivotally connected with the first mounting fixed point of the wheel body mounting frame 12 or the car, and the end of the second sleeve rod 22 away from the first sleeve rod 21 is hingedly connected with the movable end of the guide sliding pair mechanism 3.

[0062] Embodiment 5

[0063] Embodiment 5 is a further optimized design of any one of Embodiments 1-4;

[0064] As shown in Figures 1-4 ,

[0065] The wheel end of the cable guide wheel 11 in contact with the car cable is away from the car track; the wheel end of the cable guide wheel 11 in contact with the car cable is used to prevent the car cable from being damaged when being pressed from the longitudinal side to the direction of the car track; the rod body of the elastic telescopic rod 2 is used to block the car cable pressed from the transverse side to the direction of the wheel body mounting frame 12.

[0066] Embodiment 6

[0067] Embodiment 6 is a further optimized design of any one of Embodiments 1-5;

[0068] As shown in Figure 4

[0069] When one end of the elastic telescopic rod 2 is pivoted to the wheel body mounting frame 12, the rod body of the elastic telescopic rod 2 is arranged horizontally, and the rod body of the elastic telescopic rod 2 forms an obtuse angle with the transverse movement direction of the cable guide wheel 11.

[0070] Embodiment 7

[0071] Embodiment 7 is a further optimized design of any one of Embodiments 1-6;

[0072] As shown in Figure 4

[0073] One end point of the elastic telescopic rod 2 constitutes an origin of a three-dimensional coordinate system;

[0074] Optimally, the horizontal and vertical projection plane XZ based on the origin of the three-dimensional coordinate system is parallel to the rod body of the elastic telescopic rod 2.

[0075] Optimally, the rod body of the elastic telescopic rod 2 forms an acute angle with the longitudinal and vertical projection plane YZ based on the origin of the three-dimensional coordinate system.

[0076] Embodiment 8

[0077] Embodiment 8 is a further optimized design of any one of Embodiments 1-7;

[0078] As shown in Figures 1-8

[0079] The embodiment provides a rail-mounted crane boarding platform, which comprises:

[0080] Two cable protection devices suitable for a rail-mounted crane trolley cable as described in any one of Embodiments 1-7;

[0081] A boarding pedal 200; one of the cable protection devices suitable for a rail-mounted crane trolley cable is installed on one lateral side of the boarding platform, and the other cable protection device suitable for a rail-mounted crane trolley cable is installed on the other lateral side of the boarding platform.

[0082] The rail-mounted crane boarding platform of the embodiment forms a protection system for the trolley cable under the rail-mounted crane boarding port by arranging the cable protection device suitable for a rail-mounted crane trolley cable and the boarding pedal 200 near the rail-mounted crane boarding port.

[0083] ​​​The track crane boarding platform of the embodiment solves the technical problem that the trolley cable is hooked with the cable guide wheel 11 on both sides of the boarding gate when the trolley cable protrudes out of the slot during the cable loosening process of the automated track crane in operation, and is further dragged or even broken, ensures the safety and stability of the trolley cable during the cable collection process after the cable loosening out of the slot, thereby effectively protecting the trolley cable, avoiding the equipment damage and potential safety hazards caused thereby, and ensuring the stable operation of the automated track crane at the wharf.

[0084] Optimally, one of the wheel body mounting frames 12 for the protection device for the trolley cable of the track crane is mounted on the lateral side of the boarding platform, and the other is mounted on the lateral side of the boarding platform.

[0085] Optimally, the wheel end of the cable guide wheel 11 in contact with the trolley cable protrudes from the longitudinal side of the boarding platform away from the trolley track in the longitudinal direction.

[0086] Optimally, the wheel body mounting frame 12 further comprises a baffle; the baffle is used to laterally block the trolley cable.

[0087] Further, the baffle is an L-shaped metal plate, the lateral plate part of the baffle is mounted on the top surface of the main body of the wheel body mounting frame 12, and the vertical plate part of the baffle laterally blocks the cable when the trolley moves laterally; the baffle is an arc-shaped connecting plate.

[0088] Specifically, the baffle is formed by two square small iron plates welded at right angles to form a “7” shaped structure, and is firmly mounted on the top of the wheel body mounting frame 12 by bolts, and the vertical protrusion of the baffle can serve as the guide column body 32 at one end of the elastic expansion rod 2; the structure of the baffle aims to cover the area where the cable guide wheel 11 and the trolley cable may be in direct contact, block the direct contact of the trolley cable with the cable guide wheel 11 due to the protrusion out of the slot, and prevent the trolley cable from deviating to the inside of the boarding gate, thereby preliminarily avoiding the hooking phenomenon.

[0089] Further optimization, the left side of the boarding platform 200 elastic telescopic rod 2 is arranged obliquely inward, the elastic telescopic rod 2 and the guide column body 32 are connected by bolts, fixed on a through slot on the side of the ice cream cylinder platform beside the boarding gate, can move horizontally, and form a triangular barrier with the boarding gate and the ice cream cylinder placing platform; the elastic telescopic rod 2 on the right side of the boarding platform 200 is arranged obliquely to the right and upward, and is connected with the guide column body 32 and fixed on a through slot on the side of the boarding gate stairs, can move horizontally, and form an oblique barrier; when the cable touches the elastic telescopic rod 2 during the cable collection process, under the action of the cable force, the spring of the elastic telescopic rod 2 is compressed, the guide column body 32 moves inward for a distance and then stops, at this time the inductive switch 4 senses the iron sheet of the guide column body 32, and feeds back the cable out of the slot signal; such design can effectively block the protruding too high cable of the trolley from passing above the cable guide wheel 11 (i.e. the boarding gate cable guide wheel) during the cable collection process, prevent it from being hooked with the wheel body mounting frame 12, and further enhance the protection of the cable of the trolley; the elastic telescopic rod 2 on the left side of the boarding platform 200 and the elastic telescopic rod 2 on the right side of the boarding platform 200 adopt horizontal arrangement mode and oblique arrangement mode respectively, so that the trolley cable can be reliably blocked from passing above the cable guide wheel 11 and avoiding being hooked with the corresponding wheel body mounting frame 12.

[0090] Compared with the prior art, the track crane boarding platform of the embodiment can timely block and guide the protruding trolley cable during the cable collection process without manual monitoring after the trolley cable is loosened and out of the slot, the baffle first changes the movement direction of the trolley cable, prevents the trolley cable from deviating to the inside of the boarding gate, and the elastic telescopic rod 2 further blocks the cable from protruding upward and passing above the cable guide wheel 11, fundamentally reduces the possibility of the trolley cable being hooked with the wheel body mounting frame 12 of the boarding gate, and the inductive switch 4 can timely feed back the trolley cable out of the slot abnormality to the technical personnel, thereby improving the safety and automation level of the utility model, greatly improving the protection ability of the trolley cable, effectively reducing the probability of the trolley cable being hooked with the wheel body mounting frame 12, and the structure is simple, convenient to install and maintain, and no additional operation steps are needed.

[0091] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as limiting the patent scope of the utility model. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A protection device for a cable of a rail-mounted crane car, characterized in that, The invention relates to a cable anti-scratching mechanism (1) comprising a plurality of cable guide wheels (11) and wheel body mounting frames (12) for mounting the cable guide wheels (11); the wheel body mounting frames (12) are mounted on one side of the bottom of a trolley of an automated rail-mounted crane; a flexible telescopic rod (2); the flexible telescopic rod (2) is located on the transverse front side of the cable anti-scratching mechanism (1), and the moving direction of the trolley is transverse; one end of the flexible telescopic rod (2) is pivotally connected to a first mounting fixed point of the wheel body mounting frame (12) or the trolley; the rod body of the flexible telescopic rod (2) is used for blocking the relative movement of the trolley cable; a guide sliding pair mechanism (3); the fixed end of the guide sliding pair mechanism (3) is fixedly connected to a second mounting fixed point of the trolley; the other end of the flexible telescopic rod (2) is hingedly connected to the movable end of the guide sliding pair mechanism (3); the guide sliding pair mechanism (3) is used for guiding and limiting the other end of the flexible telescopic rod (2) within the sliding stroke of the guide sliding pair mechanism (3); an inductive switch (4); when the other end of the flexible telescopic rod (2) is located at one detection position within the sliding stroke of the guide sliding pair mechanism (3), the inductive switch (4) is not triggered; when the other end of the flexible telescopic rod (2) is located at another detection position within the sliding stroke of the guide sliding pair mechanism (3), the inductive switch (4) is triggered. The guide sliding pair mechanism (3) comprises a guide plate (31) provided with a guide groove (311) and a guide column body (32) embedded in the guide groove (311); one end of the guide column body (32) is hingedly connected to the other end of the flexible telescopic rod (2); when the flexible telescopic rod (2) swings due to the action force of the trolley cable and the other end of the flexible telescopic rod (2) moves to the other detection position within the sliding stroke of the guide sliding pair mechanism (3), the other end of the guide column body (32) triggers the inductive switch (4).

2. Protection device for the cable of a rail-mounted crane according to claim 1, characterized in that The other end of the guide column body (32) triggers the inductive switch (4) through a metal block (33) connected to the other end of the guide column body (32).

3. Protection device for the cable of a rail-mounted crane according to claim 2, characterized in that The flexible telescopic rod (2) comprises a first sleeve rod (21), a second sleeve rod (22) and a compression spring (23); the first sleeve rod (21) and the second sleeve rod (22) are sequentially sleeved with each other in a head-to-tail manner, the compression spring (23) is embedded in one of the sleeve rods, and the two ends of the compression spring (23) respectively abut against the first sleeve rod (21) and the second sleeve rod (22); one end of the first sleeve rod (21) away from the second sleeve rod (22) is pivotally connected to the first mounting fixed point of the wheel body mounting frame (12) or the trolley, and the other end of the second sleeve rod (22) away from the first sleeve rod (21) is hingedly connected to the movable end of the guide sliding pair mechanism (3).

4. Protection device for the cable of a rail-mounted crane according to claim 1, characterized in that, The end of the cable guide wheel (11) in contact with the trolley cable is away from the trolley track; the end of the cable guide wheel (11) in contact with the trolley cable is used for preventing the trolley cable from being damaged when the trolley cable is pressed from the longitudinal side to the direction of the trolley track; the rod body of the flexible telescopic rod (2) is used for blocking the trolley cable pressed from the transverse side to the direction of the wheel body mounting frame (12).

5. The protection device for a cable of a rail-mounted trolley according to claim 1, characterized in that, ​ 6. Protection device suitable for use with a cable of a rail-mounted crane according to claim 1, characterized in that, When one end of the elastic telescopic rod (2) is pivoted to the wheel body mounting frame (12), the rod body of the elastic telescopic rod (2) is arranged horizontally, and the rod body of the elastic telescopic rod (2) forms an obtuse angle with the lateral moving direction of the cable guide wheel (11).

7. Protection device suitable for use with a cable of a rail-mounted crane according to claim 1, characterized in that When one end of the elastic telescopic rod (2) is pivoted to the wheel body mounting frame (12), the rod body of the elastic telescopic rod (2) is arranged horizontally, and the rod body of the elastic telescopic rod (2) forms an obtuse angle with the lateral moving direction of the cable guide wheel (11).

8. A rail-mounted gantry, characterized by, Comprise: Two cable protection devices for track crane trolley according to any one of claims 1-7; The boarding pedal (200); wherein one of the cable protection devices for track crane trolley is installed on one lateral side of the boarding pedal, and the other cable protection device for track crane trolley is installed on the other lateral side of the boarding pedal.

9. The rail hoist of claim 8, wherein, The wheel body mounting frame (12) of one of the cable protection devices for track crane trolley is installed on one lateral side of the boarding pedal, and the wheel body mounting frame (12) of the other cable protection device for track crane trolley is installed on the other lateral side of the boarding pedal.

10. The rail hoist of claim 8, wherein, The wheel end of the cable guide wheel (11) in contact with the trolley cable protrudes in the longitudinal direction from the longitudinal side of the boarding pedal away from the trolley track; The wheel body mounting frame (12) further comprises a baffle; the baffle is used to laterally block the trolley cable.

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