Hoisting crane moving mechanism and guide rail crane car

Abstract

The invention relates to the technical field of railway hoisting devices, in particular to a hoisting crane moving mechanism and a guide rail crane car. The invention provides a hoisting crane moving mechanism which comprises a loading platform, a displacement unit and a driving unit, the loading platform is provided with a crane mounting position, the displacement unit comprises a guide rail and a plurality of wheel sets, the guide rail is arranged on a hoisting vehicle body, and the loading platform is connected with the guide rail through the wheel sets. The driving unit is used for driving the loading platform to move in the extending direction of the guide rail, the wheel set comprises a first mounting part and a plurality of walking wheels, the walking wheels are connected to the first mounting part, the first mounting part is connected with the loading platform through a first connecting shaft, and the rotating direction of the first connecting shaft is the same as that of the walking wheels. According to the technical scheme, the crane can move on the crane body, the bearing capacity of the displacement unit is improved, and it is guaranteed that the crane runs smoothly under the conditions that a vehicle body is bent and the vehicle inclines in the transverse direction and the longitudinal direction.

Description

Technical Field

[0001] The present disclosure relates to the technical field of railway lifting devices, and in particular to a crane moving mechanism and a guide rail crane vehicle. Background Art

[0002] With the continuous and rapid development of the railway transportation industry, the construction and maintenance of railways are also developing continuously, and the demand for railway engineering vehicles and the adaptability to the environment are also increasing. The railway hoisting guide rail flat car is a special machine that is installed on a railway flat car after the hydraulic crane is improved, and is used to load and unload materials used in railway line maintenance. Because of its advantages of large loading and unloading operation radius and high operation efficiency, it is widely used in railway line maintenance departments. For example, the telescopic boom crane still has a certain lifting weight and lifting height when the boom is placed horizontally, so that it also has a certain line maintenance and rescue recovery capabilities in the tunnel. Under the electrified line, it does not need to remove the contact network of the adjacent line to quickly put into rescue or line maintenance work, which brings great convenience to related work.

[0003] Most of the existing rail loading and unloading crane cranes are fixedly installed on the vehicle body and cannot be moved, and no loading area is set on the vehicle body. Summary of the invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present disclosure provides a crane moving mechanism, characterized in that it includes a loading platform, a displacement unit and a driving unit, the loading platform is provided with a crane installation position, the displacement unit includes a guide rail and a plurality of wheel sets, the guide rail is provided on the lifting vehicle body, the loading platform is connected to the guide rail through the plurality of wheel sets, and the driving unit is used to drive the loading platform to move in the extension direction of the guide rail, wherein:

[0006] The wheel group includes a first mounting portion and a plurality of running wheels, wherein the plurality of running wheels are connected to the first mounting portion, and the first mounting portion is connected to the loading platform via a first connecting shaft, and a rotation direction of the first connecting shaft is the same as a rotation direction of the running wheels.

[0007] In a feasible embodiment, the running wheel includes a running wheel body, a second connecting shaft and a plurality of running wheel bearings, the second connecting shaft is connected to the first mounting portion, a plurality of running wheel bearings are connected to the second connecting shaft, the running wheel body is sleeved on the running wheel bearings, and the second connecting shaft and the running wheel bearings have the same rotation direction as the first connecting shaft.

[0008] In a feasible implementation manner, the number of the running wheels is set to two, and the first connecting shaft is arranged between the two running wheels.

[0009] In a feasible implementation manner, a limiting wheel is provided on the first connecting shaft, the limiting wheel abuts against a side wall of the guide rail adjacent to the running wheel, and the limiting wheel is used to limit the wheel surface of the running wheel from being out of contact with the guide rail.

[0010] In a feasible embodiment, the limiting wheel includes a first fixed shaft, a limiting wheel connecting shaft, a limiting wheel body and an elastic member, the limiting wheel connecting shaft is connected to the first fixed shaft, the limiting wheel body is sleeved on the limiting wheel connecting shaft, an installation space is opened on one side end face of the first connecting shaft, the first fixed shaft portion is arranged in the installation space, the elastic member is arranged in the installation space, and the elastic member is used to apply a force for the limiting wheel body to abut against the side wall of the guide rail.

[0011] In a feasible implementation manner, the driving unit includes a second mounting portion, a driving member, a driving gear, a rack and a third connecting shaft, the rack is connected to the guide rail, and the rack is extended along the extension direction of the guide rail, the driving gear is meshed with the rack, and the driving member is used to apply a force to rotate the driving gear, wherein,

[0012] The third connecting shaft includes a second fixed shaft and a radial spherical bearing. The second mounting part is connected to the loading platform via the second fixed shaft. The radial spherical bearing is passed through the second fixed shaft. The second fixed shaft is used to enable the second mounting part to rotate horizontally relative to the loading platform. The radial spherical bearing is used to enable the second mounting part to swing relative to the horizontal plane of the loading platform.

[0013] In a feasible implementation manner, the driving member is disposed on one side of the loading platform, and the driving member is connected to the driving gear via a commutator.

[0014] In a feasible embodiment, it also includes a preload spring, which is connected to the second mounting portion, and the preload spring is used to apply a force that causes the driving gear to engage with the rack when the second mounting portion swings relative to the loading platform.

[0015] In a feasible embodiment, it also includes a limiting mechanism, which includes a limiting drive, a limiting card plate and a plurality of limiting slots, the limiting drive is connected to the loading platform, and the plurality of limiting slots are arranged at intervals along the extension direction of the guide rail, and the limiting mechanism has a limiting state and an unlocking state, wherein in the limiting state, the limiting drive drives the limiting card plate to engage with the limiting slot; in the unlocking state, the limiting drive drives the limiting card plate to disengage from the limiting slot.

[0016] In a second aspect of the present disclosure, a rail crane vehicle is provided, comprising the above-mentioned crane moving mechanism.

[0017] The above description is only an overview of the technical solution provided by the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented according to the contents of the specification. In order to make the above and other features and effects of the present disclosure more obvious and easy to understand, the implementation methods of the present disclosure are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the structure of assembling a crane on a lifting vehicle body disclosed in the present invention;

[0022] Figure 2 It is a schematic diagram of the top view structure of the present disclosure;

[0023] Figure 3 It is one of the side view structural schematic diagrams of the present disclosure;

[0024] Figure 4 This is the second side view structural schematic diagram of the present disclosure;

[0025] Figure 5 It is a schematic diagram of the structure of the running wheel disclosed in the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the limiting wheel disclosed in the present invention;

[0027] Figure 7 It is a side view structural schematic diagram of the wheel set disclosed in the present invention;

[0028] Figure 8 It is a schematic diagram of the top view of the structure of the wheel set disclosed in the present invention;

[0029] Fig. 9 is a schematic diagram of a top view of the structure of the drive unit disclosed in the present invention;

[0030] Fig.10 is a schematic diagram of the side structure of the drive unit disclosed in the present invention;

[0031] Fig.11 It is a structural schematic diagram of the second fixed shaft and the radial spherical plain bearing disclosed in the present invention;

[0032] Fig.12 It is a structural schematic diagram of the limiting mechanism disclosed in the present invention.

[0033] in, Figures 1 to 12 The corresponding relationship between the reference numerals and the component names is as follows:

[0034] 100-lifting vehicle body; 200-lifting vehicle body; 300-encoder;

[0035] 1- loading platform; 11- crane installation position;

[0036] 2-displacement unit; 21-guide rail; 22-wheel set; 221-first mounting portion; 222-traveling wheel; 223-first connecting shaft; 224-traveling wheel body; 225-second connecting shaft; 226-traveling wheel bearing; 23-limiting wheel; 231-first fixed shaft; 232-limiting wheel connecting shaft; 233-limiting wheel body; 234-elastic member; 235-limiting flat key;

[0037] 3-driving unit; 31-second mounting part; 32-driving member; 33-driving gear; 34-rack; 35-third connecting shaft; 351-second fixed shaft; 352-radial spherical bearing; 36-commutator; 37-preload spring; 4-limiting mechanism; 41-limiting driving member; 42-limiting clamping plate; 43-limiting clamping slot. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0040] At present, telescopic boom cranes still have a certain lifting capacity and lifting height when the boom is placed horizontally, which enables them to have certain line maintenance and rescue recovery capabilities in tunnels. Under electrified lines, it is not necessary to remove the contact network of adjacent lines to quickly put them into rescue or line maintenance work, which brings great convenience to related work. However, the existing guide rail loading and unloading crane cranes are mostly fixedly installed on the vehicle body and cannot be moved. There is no loading area on the vehicle body, and the vehicle body will bend and the vehicle will tilt horizontally and longitudinally during the operation of the crane.

[0041] Based on this, the embodiment of the present disclosure provides a lifting crane moving mechanism, including a loading platform, a displacement unit and a driving unit, the loading platform is provided with a crane installation position, the displacement unit includes a guide rail and a plurality of wheel groups, the guide rail is provided on the lifting vehicle body, the loading platform is connected to the guide rail through a plurality of wheel groups, the driving unit is used to drive the loading platform to move in the extension direction of the guide rail, the wheel group includes a first mounting portion and a plurality of running wheels, the plurality of running wheels are connected to the first mounting portion, the first mounting portion is connected to the loading platform through a first connecting shaft, and the rotation direction of the first connecting shaft is the same as the rotation direction of the running wheels. By implementing the technical solution of the present disclosure, the crane can be moved on the crane body, and the load-bearing capacity of the displacement unit is increased, ensuring smooth operation when the vehicle body is bent and the vehicle is tilted laterally or longitudinally.

[0042] The mobile mechanism of the crane is described in detail below through a specific embodiment:

[0043] Reference Figures 1 to 12 As shown, in the first aspect of the present disclosure, a lifting crane moving mechanism is provided, including a loading platform 1, a displacement unit 2 and a driving unit 3, the loading platform 1 is provided with a crane installation position 11, the displacement unit 2 includes a guide rail 21 and a plurality of wheel groups 22, the guide rail 21 is provided on the lifting vehicle body 100, the loading platform 1 is connected to the guide rail 21 through a plurality of wheel groups 22, the driving unit 3 is used to drive the loading platform 1 to move in the extension direction of the guide rail 21, wherein the wheel group 22 includes a first mounting portion 221 and a plurality of running wheels 222, the plurality of running wheels 222 are connected to the first mounting portion 221, the first mounting portion 221 is connected to the loading platform 1 through a first connecting shaft 223, and the rotation direction of the first connecting shaft 223 is the same as the rotation direction of the running wheel 222.

[0044] The guide rail 21 of the present disclosure is arranged on the lifting vehicle body 100, and its connection method can be selected from welding or bolt connection. The present disclosure specifically selects welding to connect with the lifting vehicle body 100 to ensure the stability of the guide rail 21, and the loading platform 1 is connected to the guide rail 21 through multiple wheel groups 22, and the driving unit 3 drives the loading platform 1 to move in the extension direction of the guide rail 21, wherein the driving method of the driving unit 3 can be selected from driving the driving gear 33 and the rack 34 to cooperate and drive, and the rack 34 is fixed to the guide rail 21 by bolts or welding, and the driving member of the driving unit 3 makes the driving gear 33 rotate, so that the loading platform 1 moves as a whole and drives the wheel group 22 to slide and move during sliding, and the driving unit 3 can also be set as a combination of a slider and a slideway, and the driving member of the driving unit 3 drives the slide to move in the slideway to drive the loading platform 1 to move. The loading platform 1 of the present disclosure is provided with a crane installation position 11, and the crane installation position 11 can be set at the center of the loading platform 1 to increase the balance of the crane 200 when moving. Specifically, the loading platform 1 adopts a modular design, and by changing the size of the crane installation position 11 or adding a conversion connection module, it is possible to carry different types of cranes or transfer equipment, thereby providing adaptability of the mobile vehicle.

[0045] The wheel set 22 disclosed in the present invention includes a first mounting portion 221 and a plurality of running wheels 222, wherein the plurality of running wheels 222 are connected to the first mounting portion 221, and the first mounting portion 221 is connected to the loading platform 1 via a first connecting shaft 223, and the rotation direction of the first connecting shaft 223 is the same as the rotation direction of the running wheels 222. The plurality of running wheels 222 adopt a multi-wheel pair structure, and are connected to the loading platform 1 via the first connecting shaft 223 and the first mounting portion 221. Compared with the structure in which the wheels are directly mounted on the loading platform 1, the running wheelbase is reduced. At the same time, the carrying capacity of the mobile trolley is improved. Furthermore, when the guide rail 21 is deformed due to the tilting, lateral movement, etc. of the lifting vehicle body 100, the plurality of running wheels 222 can swing around the first connecting shaft 223, and the plurality of running wheels 222 are always kept released from the guide rail 21, thereby ensuring smooth operation.

[0046] Specifically, the displacement unit 2 can be set on both sides or in the middle of the extension direction of the loading body 1, and can be adaptively adjusted according to the selection of the crane. The present disclosure specifically sets the displacement unit 2 on both sides of the extension direction of the loading platform 1 to improve the operating stability of the loading platform 1.

[0047] In some embodiments, the running wheel 222 includes a running wheel body 224, a second connecting shaft 225 and a plurality of running wheel bearings 226, the second connecting shaft 225 is connected to the first mounting portion 221, a plurality of running wheel bearings 226 are connected to the second connecting shaft 225, the running wheel body 224 is sleeved on the running wheel bearing 226, and the second connecting shaft 225 and the running wheel bearing 226 have the same rotation direction as the first connecting shaft 223.

[0048] In this embodiment, the running wheel 222 includes a running wheel body 224, a second connecting shaft 225 and a plurality of running wheel bearings 226, so that the running wheel is configured as a dual rotation structure. The second connecting shaft 225 can rotate with the first mounting portion 221, and the running wheel 222 can rotate relative to the second connecting shaft 225. When one of the second connecting shaft 225 and the running wheel bearing 226 cannot rotate under special working conditions, the running wheel can still continue to move, thereby improving the safety of the device.

[0049] In some embodiments, the number of the running wheels 222 is set to two, and the first connecting shaft 223 is disposed between the two running wheels 222 .

[0050] In this embodiment, if Figure 7 and 8 As shown, the number of the running wheels 222 is set to two, and the first connecting shaft 223 is set between the two running wheels 222 to ensure displacement stability, so that the two running wheels 222 can swing relative to each other and improve the contact rate with the guide rail 21.

[0051] In some embodiments, a limiting wheel 23 is disposed on the first connecting shaft 223 , the limiting wheel 23 abuts against the side wall adjacent to the guide rail 21 and the running wheel 222 , and the limiting wheel 23 is used to limit the wheel surface of the running wheel 222 from being out of contact with the guide rail 21 .

[0052] In this embodiment, a limiting wheel 23 is provided on the first connecting shaft 223 of the present disclosure, and the limiting wheel 23 abuts against the side wall of the guide rail 21 adjacent to the running wheel 222. The limiting wheel 23 abuts against the side wall of the guide rail 21 adjacent to the running wheel 222 so that the limiting wheel 23 protrudes from the running wheel 222. When tilting, the limiting wheel 23 can exert a relative force on the running wheel 222 so that the running wheel 222 remains in the guide rail 21 and does not fall out of the guide rail 21, thereby ensuring that the moving trolley runs smoothly without deviation.

[0053] In some embodiments, the limiting wheel 23 includes a first fixed shaft 231, a limiting wheel connecting shaft 232, a limiting wheel body 233 and an elastic member 234. The limiting wheel connecting shaft 232 is connected to the first fixed shaft 231, and the limiting wheel body 233 is sleeved on the limiting wheel connecting shaft 232. An installation space 235 is opened on one side end face of the first connecting shaft 223, and a part of the first fixed shaft 231 is arranged in the installation space 235. The elastic member 234 is arranged in the installation space 235. The elastic member 234 is used to apply a force that causes the limiting wheel body 233 to abut against the side wall of the guide rail 21.

[0054] In this embodiment, the limiting wheel 23 is provided with an elastic member 234. When the vehicle is working on the super-high line, due to the action of the elastic member 234, the limiting wheel 23 on the mobile trolley is ensured to be in reliable contact with the side of the guide rail 21 and have displacement space to avoid rigid contact, so as to ensure that the mobile trolley runs smoothly without deviation. Furthermore, a limiting flat key 236 can be provided on the side wall of the installation space 235 to ensure that the limiting wheel 23 maintains a neutral position.

[0055] In some embodiments, the driving unit 3 includes a second mounting portion 31, a driving member 32, a driving gear 33, a rack 34 and a third connecting shaft 35. The rack 34 is connected to the guide rail 21, and the rack 34 is extended along the extension direction of the guide rail 21. The driving gear 33 is meshed with the rack 34. The driving member 32 is used to apply a force to rotate the driving gear 33. The third connecting shaft 35 includes a second fixed shaft 351 and a radial spherical bearing 352. The second mounting portion 31 is connected to the loading platform 1 through the second fixed shaft 351. The radial spherical bearing 352 is penetrated by the second fixed shaft 351. The second fixed shaft 351 is used to make the second mounting portion 31 rotate horizontally relative to the loading platform 1. The radial spherical bearing 352 is used to make the second mounting portion 31 swing relative to the horizontal plane of the loading platform 1.

[0056] In this embodiment, the driving unit 3 of the present disclosure is provided with a third connecting shaft 35, and a radial spherical bearing is provided in the third connecting shaft 35. When the crane is working, when the loading platform 1 is not parallel to the guide rail 21, the second mounting portion 31 can swing around the third connecting shaft 35 to ensure that the driving gear 33 is parallel to the rack 34, so that the driving gear 33 and the rack 34 are reliably engaged, thereby increasing the driving stability. Further, in order to facilitate assembly, the driving member 32 is provided on one side of the loading platform 1, and the driving member 32 is connected to the driving gear 33 through a commutator 36. Specifically, the driving member 32 of the present disclosure can be provided as a driving motor, a hydraulic motor, etc., and the present disclosure specifically selects a hydraulic motor.

[0057] In some embodiments, a preload spring 37 is further included. The preload spring 37 is connected to the second mounting portion 31 and is used to apply a force that drives the gear 33 to engage with the rack 34 when the second mounting portion 31 swings relative to the loading platform 1 .

[0058] In this embodiment, the preload spring 37, the third connecting shaft 35 and the driving gear 33 of the present invention are designed as a lever structure. When the whole vehicle is working on the super-elevation line and the present invention moves to one side track 21, the preload force of the preload spring is used to ensure that the driving gear 3) is reliably engaged with the rack 34.

[0059] In some embodiments, a limiting mechanism 4 is also included, which includes a limiting drive 41, a limiting card plate 42 and a plurality of limiting card slots 43. The limiting drive 41 is connected to the loading platform 1, and the plurality of limiting card slots 43 are arranged at intervals along the extension direction of the guide rail 21. The limiting mechanism 4 has a limiting state and an unlocking state. In the limiting state, the limiting drive 41 drives the limiting card plate 42 to engage with the limiting card slot 43; in the unlocking state, the limiting drive 41 drives the limiting card plate 42 to disengage from the limiting card slot 43.

[0060] In this embodiment, when the present invention is parked, the limiting card plate 42 is clamped into the limiting card slot 43 through the limiting driving member 41, which plays a limiting role and ensures the driving safety of the vehicle. Specifically, the limiting driving member 41 can be a telescopic cylinder, a telescopic oil cylinder, etc., and the present invention specifically sets the limiting driving member 41 on the bearing surface of the loading platform 1, and the limiting card plate 42 passes through the loading platform 1, and its clamping end is set on one side of the guide rail 21, and a plurality of limiting card slots 43 are set on the guide rail 21, and the limiting card plate 42 is hinged with the limiting driving member 41, and the limiting card plate 42 is clamped into the limiting card slot 43 when the limiting driving member 41 is extended; when the limiting driving member 41 is retracted, the limiting card plate 42 is separated from the limiting card slot 43.

[0061] In some embodiments, an encoder 3000 is provided on the driving unit 3, and the encoder 300 is connected to the driving gear 33 through a flexible shaft. By detecting the number of revolutions of the encoder rotor, the moving distance of the moving vehicle and the precise parking are controlled.

[0062] In some embodiments, the present disclosure is further provided with an adjustable safety limit stop 5 to control the swing angle of the drive unit 3, eliminate the tooth jumping phenomenon between the drive gear 33 and the rack 34, and ensure the safe operation of the mobile vehicle.

[0063] In a second aspect of the present disclosure, a rail crane vehicle is provided, comprising the above-mentioned crane moving mechanism.

[0064] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0065] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0066] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A crane moving mechanism, characterized in that: It includes a loading platform, a displacement unit and a driving unit, wherein the loading platform is provided with a crane installation position, the displacement unit includes a guide rail and a plurality of wheel sets, the guide rail is provided on the lifting vehicle body, the loading platform is connected to the guide rail through the plurality of wheel sets, and the driving unit is used to drive the loading platform to move in the extension direction of the guide rail, wherein: The wheel group includes a first mounting portion and a plurality of running wheels, wherein the plurality of running wheels are connected to the first mounting portion, and the first mounting portion is connected to the loading platform via a first connecting shaft, and a rotation direction of the first connecting shaft is the same as a rotation direction of the running wheels.

2. The crane moving mechanism according to claim 1, characterized in that: The running wheel includes a running wheel body, a second connecting shaft and a plurality of running wheel bearings, the second connecting shaft is connected to the first mounting portion, a plurality of running wheel bearings are connected to the second connecting shaft, the running wheel body is sleeved on the running wheel bearings, and the second connecting shaft and the running wheel bearings have the same rotation direction as the first connecting shaft.

3. The crane moving mechanism according to claim 1, characterized in that: The number of the running wheels is set to two, and the first connecting shaft is arranged between the two running wheels.

4. The crane moving mechanism according to claim 1, characterized in that: A limiting wheel is arranged on the first connecting shaft, the limiting wheel abuts against a side wall of the guide rail adjacent to the running wheel, and the limiting wheel is used to limit the wheel surface of the running wheel from being out of contact with the guide rail.

5. The crane moving mechanism according to claim 4, characterized in that: The limiting wheel includes a first fixed shaft, a limiting wheel connecting shaft, a limiting wheel body and an elastic member, the limiting wheel connecting shaft is connected to the first fixed shaft, the limiting wheel body is sleeved on the limiting wheel connecting shaft, an installation space is provided on one side end face of the first connecting shaft, the first fixed shaft portion is arranged in the installation space, the elastic member is arranged in the installation space, and the elastic member is used to apply a force for the limiting wheel body to abut against the side wall of the guide rail.

6. The crane moving mechanism according to claim 1, characterized in that: The driving unit includes a second mounting portion, a driving member, a driving gear, a rack and a third connecting shaft, wherein the rack is connected to the guide rail and is extended along the extension direction of the guide rail, the driving gear is meshed with the rack, and the driving member is used to apply a force to rotate the driving gear, wherein: The third connecting shaft includes a second fixed shaft and a radial spherical bearing. The second mounting part is connected to the loading platform via the second fixed shaft. The radial spherical bearing is passed through the second fixed shaft. The second fixed shaft is used to enable the second mounting part to rotate horizontally relative to the loading platform. The radial spherical bearing is used to enable the second mounting part to swing relative to the horizontal plane of the loading platform.

7. The crane moving mechanism according to claim 6, characterized in that: The driving member is arranged on one side of the loading platform, and the driving member is connected with the driving gear through a commutator.

8. The crane moving mechanism according to claim 6, characterized in that: It also includes a preload spring, which is connected to the second mounting portion and is used to apply a force that causes the driving gear to mesh with the rack when the second mounting portion swings relative to the loading platform.

9. The crane moving mechanism according to claim 1, characterized in that: It also includes a limiting mechanism, which includes a limiting driving member, a limiting card plate and a plurality of limiting card slots, the limiting driving member is connected to the loading platform, and the plurality of limiting card slots are arranged at intervals along the extension direction of the guide rail, and the limiting mechanism has a limiting state and an unlocking state, wherein: In the limit state, the limit driving component drives the limit clamping plate to engage with the limit clamping slot; In the unlocked state, the limit driving component drives the limit clamping plate to disengage from the limit clamping slot.

10. A guide rail crane, characterized in that: A crane moving mechanism comprising any one of claims 1 to 9.

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