Longitudinal skid car

Abstract

The application discloses a longitudinal sliding trolley, which comprises a mounting seat, a plurality of rollers and a locking disc. The mounting seat is used for carrying a box girder outer side steel mold. The plurality of rollers are rotatably arranged on the lower end of the mounting seat along the axis in the left-right direction. The plurality of rollers comprise a brake wheel, and a plurality of connecting recesses are formed on the end face of the brake wheel in the circumferential direction. The locking disc is movably mounted to the mounting seat in the left-right direction through an elastic member. The locking disc is provided with a locking protrusion, and the locking protrusion is arranged correspondingly to the connecting recess. In the forward rotation stroke of the brake wheel, the corresponding connecting recess can extrude the locking protrusion in the left-right direction to push the locking disc to move away from the brake wheel. In the reverse rotation stroke of the brake wheel, the elastic member can drive the locking disc to approach the brake wheel until the locking protrusion is clamped into the corresponding connecting recess to limit the reverse rotation of the brake wheel. The reverse rotation of the brake wheel is limited through the locking disc, so that the longitudinal sliding trolley is prevented from sliding downward, and the safety of construction is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of box girder construction operation, and particularly relates to a longitudinal sliding trolley. BACKGROUND

[0002] Traditional box girder formwork construction needs to occupy auxiliary roads and main roads to use a truck crane to install and dismount the formwork, which seriously affects traffic and has high safety risks in hoisting operation. In order to solve these problems, the existing box girder construction process is mostly operated through box girder formwork sliding construction technology. The specific construction method is that the box girder side formwork is placed on the longitudinal sliding trolley, and the box girder side formwork is transported to the preset position for installation and fixation through the longitudinal sliding trolley. However, in the construction process, the longitudinal sliding trolley is generally pushed by manpower. Since the overall weight of the box girder formwork and the longitudinal sliding trolley is generally large, when the road section slope is large, the longitudinal sliding trolley is easy to slide down and cause accidents. SUMMARY

[0003] The main purpose of the present application is to provide a longitudinal sliding trolley, which aims to solve the problem that the longitudinal sliding trolley in the existing box girder formwork sliding construction process is easy to slide down on a slope section and cause accidents.

[0004] To achieve the above-mentioned purpose, the longitudinal sliding trolley provided by the present application comprises:

[0005] A mounting seat is used to carry a box girder outside steel formwork;

[0006] A plurality of roller wheels are rotatably arranged at the lower end of the mounting seat along the left-right direction axis, and the plurality of roller wheels comprise a brake wheel, and a plurality of coupling recesses are formed on the end face of the brake wheel in the circumferential direction; and

[0007] A locking disc is movably mounted to the mounting seat in the left-right direction through an elastic element, the locking disc is provided with a locking protrusion, and the locking protrusion is arranged corresponding to the coupling recess;

[0008] On the forward rotation stroke of the brake wheel, the corresponding coupling recess can extrude the locking protrusion in the left-right direction to push the locking disc to avoid the brake wheel;

[0009] On the reverse rotation stroke of the brake wheel, the elastic element can drive the locking disc to approach the brake wheel until the locking protrusion is clamped into the corresponding coupling recess to limit the reverse rotation of the brake wheel.

[0010] Optionally, the coupling recess has a first abutting surface and a second abutting surface opposite in the circumferential direction of the locking disc;

[0011] The locking protrusion is rotationally arranged along an axis in a radial direction of the locking disc, and has a first locking position for blocking forward rotation of the brake wheel and a second locking position for blocking reverse rotation of the brake wheel in a rotation stroke of the locking protrusion. The locking protrusion has a first stop surface, a second stop surface, and a pressing slope, and opposite sides of the pressing slope are respectively adjacent to the first stop surface and the second stop surface.

[0012] In the first locking position, the first stop surface is opposite to the first abutting surface, and the pressing slope is arranged towards the second abutting surface.

[0013] In the second locking position, the second stop surface is opposite to the second abutting surface, and the pressing slope is arranged towards the first abutting surface.

[0014] The longitudinal sliding trolley further comprises an adjusting mechanism for driving the locking protrusion to switch between the first locking position and the second locking position.

[0015] Optionally, the adjusting mechanism comprises:

[0016] a gear portion coaxially arranged in the locking protrusion; and

[0017] a rack portion annularly arranged and rotationally arranged along an axis in a left-right direction of the locking disc, and engaged to the gear portion.

[0018] Optionally, the locking protrusion and the gear portion one-to-one correspond to form a locking driving group, and the locking driving group corresponds to a plurality of the coupling recesses, and the gear portions in the plurality of locking driving groups are all engaged to the rack portion.

[0019] Optionally, a limiting hole is formed on the rack portion and is elongated along a circumferential direction of the locking disc, and in a rotation stroke of the rack portion, the rack portion has a first limit position for driving the locking protrusion to move to the first locking position and a second limit position for driving the locking protrusion to move to the second locking position.

[0020] A limiting column corresponding to the limiting hole and two insertion holes are formed on the locking disc, and in the circumferential direction of the locking disc, the two insertion holes are respectively arranged on two sides of the limiting column, and the two insertion holes can alternatively arrange an insertion column, so that when the rack portion is in the first limit position or the second limit position, the insertion column and the limiting column are respectively arranged on both sides of the limiting hole along the elongated direction.

[0021] Optionally, a giving recess having opposite two supporting surfaces is formed on the locking disc, and the locking protrusion is rotationally arranged in the giving recess.

[0022] In the first locking position, the second stop surface of the locking protrusion abuts one of the support surfaces;

[0023] In the second locking position, the first stop surface of the locking protrusion abuts the other of the support surfaces.

[0024] Optionally, the longitudinal sliding trolley further comprises a bearing plate arranged above the mounting seat and adjustable in height in the up-down direction to carry the steel form outside the box girder.

[0025] Optionally, a guide column extending downward is formed on the bearing plate.

[0026] A cylinder jacking mechanism is arranged between the bearing plate and the mounting seat, and the cylinder jacking mechanism comprises:

[0027] a mechanism seat plate arranged on the mounting seat, the mechanism seat plate being provided with a guide hole extending therethrough in the up-down direction, and the guide column extending into the guide hole; and

[0028] a jacking cylinder arranged on the mechanism seat plate, the jacking cylinder having a cylinder rod extending in the up-down direction, and the upper end of the cylinder rod abutting the bearing plate.

[0029] Optionally, the position of the mechanism seat plate in the left-right direction is adjustable.

[0030] Optionally, a threaded sleeve is formed at the lower end of the mechanism seat plate.

[0031] A transmission screw rotating about an axis in the left-right direction is formed on the mounting seat, and the threaded sleeve is sleeved on the transmission screw.

[0032] In the technical solution provided by the present application, when the locking disc moves in the left-right direction, the coupling recess on the brake wheel can extrude the locking protrusion outward when the brake wheel rotates in the forward direction (i.e., when the mounting seat normally travels), and at this time, the locking disc cannot limit the rotation of the brake wheel; when the brake wheel rotates in the reverse direction (i.e., when the mounting seat starts to slide downward), the locking disc can keep abutting the brake wheel under the continuous pushing action of the elastic member, and when the last coupling recess is aligned with the locking protrusion by rotating the brake wheel, the locking protrusion can be immediately clamped into the coupling recess, thereby limiting the rotation of the brake wheel, preventing the mounting seat from sliding downward with the steel form outside the box girder, and avoiding the occurrence of safety accidents. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.

[0034] Figure 1 The structural schematic diagram of an embodiment of the longitudinal sliding trolley provided by the present application is shown in the figure.

[0035] Figure 2 The structural schematic diagram of the cross section A-A in the figure is shown in the figure. Figure 1

[0036] Figure 3 The exploded structural schematic diagram of the mounting seat, the brake wheel, the locking disc and the elastic member in the figure from one perspective is shown in the figure. Figure 1

[0037] Figure 4 The exploded structural schematic diagram of the mounting seat, the brake wheel, the locking disc and the elastic member in the figure from another perspective is shown in the figure. Figure 1

[0038] Figure 5 The relative position schematic diagram of the rack part and the gear part in the figure is shown in the figure. Figure 4

[0039] Figure 6 The local cross-sectional structural schematic diagram of the brake wheel and the locking disc (the locking convex part is in the first locking position) in the figure is shown in the figure. Figure 1

[0040] Figure 7 The local cross-sectional structural schematic diagram of the brake wheel and the locking disc (the locking convex part is in the second locking position) in the figure is shown in the figure. Figure 1

[0041] The description of the reference signs is as follows:

[0042]

[0043] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. ​​​​​​

[0045] It should be noted that if the embodiment of the present application involves directional indication, the directional indication is only used to explain the relative position relationship, motion condition and the like between components in a certain specific posture, and if the specific posture changes, the directional indication also changes accordingly.

[0046] In addition, if the embodiment of the present application involves the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0047] The traditional box girder formwork construction needs to occupy auxiliary road and main road to use car crane to carry out formwork installation and disassembly, which seriously affects traffic and has high safety risk of hoisting operation, in order to solve these problems, the existing box girder construction process is mostly operated through box girder formwork sliding construction technology, and the specific construction method is that the box girder side formwork is placed on the longitudinal sliding car, the box girder side formwork is transported to the preset position for installation and fixation through the longitudinal sliding car, however, the longitudinal sliding car is generally pushed by manpower during construction, since the overall weight of the box girder formwork and the longitudinal sliding car is generally large, when the road section slope is large, the longitudinal sliding car is easy to slide down and cause accidents.

[0048] In view of this, the longitudinal sliding trolley is proposed, which aims to solve the problem that the longitudinal sliding car in the existing box girder formwork sliding construction process is easy to slide down on the slope section and cause accidents, wherein Figures 1 to 7 The structure schematic diagram of an embodiment of the longitudinal sliding trolley provided by the present application is shown.

[0049] Please refer to Figures 1 to 7The longitudinal sliding trolley 100 comprises a mounting base 1 for loading a box girder outer side steel mold, a plurality of rollers 2 rotatably arranged on the lower end of the mounting base 1 along the left-right direction, wherein the plurality of rollers 2 comprise a brake wheel 21, and a plurality of coupling recesses 211 are formed on the end face of the brake wheel 21 in a circumferential direction; and a locking disc 3 movably mounted to the mounting base 1 along the left-right direction by an elastic member 4, wherein the locking disc 3 is provided with a locking protrusion 31 corresponding to the coupling recess 211; in the forward rotation stroke of the brake wheel 21, the corresponding coupling recess 211 can extrude the locking protrusion 31 along the left-right direction to push the locking disc 3 to avoid the brake wheel 21; in the reverse rotation stroke of the brake wheel 21, the elastic member 4 can drive the locking disc 3 to approach the brake wheel 21 until the locking protrusion 31 is clamped into the corresponding coupling recess 211 to limit the reverse rotation of the brake wheel 21.

[0050] In the technical scheme, the locking disc 3 can move along the left-right direction, when the brake wheel 21 rotates forward (that is, when the mounting base 1 normally travels), the coupling recess 211 arranged on the brake wheel 21 can extrude the locking protrusion 31 outward, at this time, the locking disc 3 cannot play a role in limiting the rotation of the brake wheel 21; when the brake wheel 21 rotates reversely (that is, when the mounting base 1 starts to slide downward), under the continuous pushing action of the elastic member 4, the locking disc 3 can keep in contact with the brake wheel 21, when the nearest coupling recess 211 rotates to the position of the locking protrusion 31 along with the rotation of the brake wheel 21, the locking protrusion 31 can be immediately clamped into the coupling recess 211, thereby playing a role in limiting the rotation of the brake wheel 21, preventing the mounting base 1 from sliding downward with the box girder outer side steel mold, and avoiding the occurrence of safety accidents.

[0051] It should be noted that, in the forward rotation, the brake wheel 21 needs to be able to convert the forward rotation of itself into the movement of the locking disc 3 away from the brake wheel 21 along the left-right direction, which is realized through the inclined surface pushing cooperation of the coupling recess 211 and the locking protrusion 31, and the specific structure form is not limited in the embodiment; the locking disc 3 can be connected to the fixed shaft of the mounting base 1 in a spline connection manner, or can be connected to the mounting base 1 in other rotation-stopping connection manners, and the embodiment does not limit this;

[0052] The elastic member 4 provides an axial reset force for the locking disc 3, which can be in the form of elastic rubber or spring. Specifically, the reset member comprises a spring, the mounting base 1 is formed with a mounting shaft 12 extending in the left-right direction, the brake wheel 21 and the locking disc 3 are arranged on the mounting shaft 12, and the end of the mounting shaft 12 is connected with an end cover 13 through a threaded pair, and the spring is arranged between the end cover 13 and the locking disc 3.

[0053] In order to increase the braking effect and avoid the brake wheel 21 from slipping on the guide rail, the brake wheel 21 is wrapped with anti-skid rubber on the periphery.

[0054] It can be understood that, after the longitudinal sliding trolley 100 transports the box girder outer steel form to the preset position, the longitudinal sliding trolley 100 can stay at the preset position together with the box girder outer steel form, and then move to the next box girder section after the current box girder section is poured. This way requires multiple longitudinal sliding trolleys 100 to carry multiple box girder outer steel forms, the number of the longitudinal sliding trolleys 100 is too large, the utilization rate is low, and the production cost is high. In view of this, please refer to Figures 3 to 7In the embodiment, the coupling recess 211 has a first abutting surface 211a and a second abutting surface 211b opposite to each other in the circumferential direction of the locking disc 3; the locking protrusion 31 is rotationally arranged along an axis in the radial direction of the locking disc 3, and has a first locking position for blocking the forward rotation of the brake wheel 21 and a second locking position for blocking the reverse rotation of the brake wheel 21 in the rotation stroke of the locking protrusion 31. The locking protrusion 31 has a first stop surface 31a, a second stop surface 31b, and a pressing slope 31c, and the opposite sides of the pressing slope 31c are respectively adjacent to the first stop surface 31a and the second stop surface 31b. In the first locking position, the first stop surface 31a is opposite to the first abutting surface 211a, and the pressing slope 31c is arranged towards the second abutting surface 211b. In the second locking position, the second stop surface 31b is opposite to the second abutting surface 211b, and the pressing slope 31c is arranged towards the first abutting surface 211a. The longitudinal sliding trolley 100 further comprises an adjusting mechanism 5 for driving the locking protrusion 31 to switch between the first locking position and the second locking position. When the longitudinal sliding trolley 100 carries the box girder outer side steel form to move forward, the locking protrusion 31 is in the second locking position, which does not limit the forward rotation of the brake wheel 21 but limits the reverse rotation thereof. After the longitudinal sliding trolley 100 moves to a preset position and places the box girder outer side steel form, the locking protrusion 31 only needs to be switched to the first locking position by the adjusting structure to limit the forward rotation of the brake wheel 21 but not limit the reverse rotation thereof, and then the longitudinal sliding trolley 100 can be reversely pushed to move to an initial position to carry the box girder outer side steel form, so as to be recycled until the outer side steel forms of the corresponding box girder segments are completely installed, thereby greatly improving the utilization rate of the longitudinal sliding trolley 100 and reducing the production cost.

[0055] The adjusting mechanism 5 has various structural forms, as long as it can drive the locking protrusion 31 to switch between the first locking position and the second locking position. For example, a lever can be used to drive the locking protrusion 31 to rotate. Specifically, please refer to Figures 5 to 7 The adjusting mechanism 5 comprises a gear portion 51 and a rack portion 52. The gear portion 51 is coaxially arranged on the locking protrusion 31; the rack portion 52 is annularly arranged and rotationally arranged along an axis in the left-right direction on the locking disc 3, and is engaged with the gear portion 51. In this way, the locking disc 3 can be rotated to drive the gear portion 51 to rotate to a desired position through the rack portion 52, so as to conveniently drive the locking protrusion 31 to forwardly and reversely act.

[0056] It can be understood that the gear rotates along the radial axis of the locking disc 3, the rack portion 52 is annularly arranged and rotates along the axial axis of the locking disc 3, and therefore the gear portion 51 and the rack portion 52 are engaged in a conical gear meshing manner.

[0057] Generally, the locking protrusions 31 only need to be provided in one and sufficient to block the rotation of the brake wheel 21 in the corresponding direction, but in order to reduce the locking pressure of a single locking protrusion 31, please refer to Figure 5 In the embodiment, the locking protrusions 31 and the gear portions 51 one-to-one correspond to form a locking driving group, the locking driving group corresponds to a plurality of the coupling recesses 211, and the gear portions 51 in the plurality of locking driving groups are all engaged to the rack portion 52. In this way, the plurality of locking protrusions 31 can be respectively clamped into the corresponding coupling recesses 211 to share the blocking force of the rotation of the brake wheel 21 to the plurality of locking protrusions 31, thereby achieving the most stable and reliable locking effect, and the plurality of gear portions 51 are all engaged to the same rack portion 52, which can synchronously drive the plurality of locking protrusions 31 to switch positions and switch efficiently.

[0058] It can be understood that the rack portion 52 needs to be kept in a fixed state after being adjusted in place to avoid the locking protrusions 31 changing the position state under the action of the coupling recesses 211, and there are various structures for fixing the position of the rack portion 52, for example, it can be fixed by magnetic attraction, and it can also be fixed by a binding belt. Please continue to refer to Figure 5In the embodiment, the rack part 52 is formed with a limiting hole 521, which is elongated along the circumferential direction of the locking disc 3. In the rotation stroke of the rack part 52, the rack part 52 has a first limit position for driving the locking protrusion 31 to move to the first locking position, and a second limit position for driving the locking protrusion 31 to move to the second locking position. The locking disc 3 is formed with a limiting column 522 corresponding to the limiting hole 521, and two insertion holes. In the circumferential direction of the locking disc 3, the two insertion holes are respectively arranged on the two sides of the limiting column 522. Two insertion columns 523 are selectively arranged in the two insertion holes. When the rack part 52 is in the first limit position or the second limit position, the insertion columns 523 are respectively arranged on the two sides of the limiting hole 521 through the limiting column 522. The distance between the two insertion holes and the limiting column 522 along the circumferential direction of the locking disc 3 is the same, and is adapted to the length of the limiting hole 521 along the elongated direction. Therefore, when the rack part 52 is in the first limit position or the second limit position, the insertion columns 523 can be respectively inserted into the corresponding insertion holes through the limiting hole 521, so as to fix the rack part 52, thereby indirectly maintaining the position of the locking protrusion 31. The structure is relatively simple, and the space requirement inside the locking disc 3 is relatively low.

[0059] When the brake wheel 21 rotates in the locking direction, the first stop surface 31a or the second stop surface 31b is in contact with the corresponding first abutting surface 211a or the second abutting surface 211b, so as to provide the rotating force of the locking protrusion 31, and finally transmit the pressure to the adjusting mechanism 5. In order to avoid the force acting on the adjusting mechanism 5, please refer to Figures 6 to 7 In the embodiment, the locking disc 3 is formed with a displacement recess 32, which has two opposite supporting surfaces 32a. The locking protrusion 31 is rotatably arranged in the displacement recess 32. In the first locking position, the second stop surface 31b of the locking protrusion 31 is in contact with one of the supporting surfaces 32a. In the second locking position, the first stop surface 31a of the locking protrusion 31 is in contact with the other supporting surface 32a. Through the two supporting surfaces 32a, the first stop surface 31a and the second stop surface 31b are respectively in contact when the locking protrusion 31 is in different position states, so as to transmit the force from the brake wheel 21 to the locking disc 3, thereby avoiding the force acting on the adjusting mechanism 5, and protecting the adjusting mechanism 5.

[0060] Since the box girder outer side steel form needs to be removed downward after pouring, and the process of removal needs artificial support to avoid the box girder outer side steel form from falling, which increases the labor intensity of construction personnel. In view of this, please refer to Figure 2 In the embodiment, the longitudinal sliding trolley 100 further comprises a bearing plate 6 arranged above the mounting seat 1 and adjustable in height in the up-down direction to carry the box girder outer side steel form. When the box girder outer side steel form needs to be removed, the height of the bearing plate 6 is only adjusted to support the box girder outer side steel form, so that the box girder outer side steel form can be effectively prevented from falling downward, and the labor intensity of construction personnel can be reduced. After removal, the height of the bearing plate 6 is only adjusted to lower, so that the box girder outer side steel form can be completely separated from the box girder segment, and the transportation of the box girder outer side steel form can be ensured.

[0061] The height adjustment mode of the bearing plate 6 can be manual height adjustment and fixation or adjustment by a mechanism. Specifically, the bearing plate 6 is formed with a downward extending guide column 61; a cylinder jacking mechanism 7 is arranged between the bearing plate 6 and the mounting seat 1, the cylinder jacking mechanism 7 comprises a mechanism seat plate 71 and a jacking cylinder 72, the mechanism seat plate 71 is arranged on the mounting seat 1, the mechanism seat plate 71 is formed with a guide hole 711 extending through in the up-down direction, and the guide column 61 extends into the guide hole 711 correspondingly; the jacking cylinder 72 is arranged on the mechanism seat plate 71, and the jacking cylinder 72 has a cylinder rod extending in the up-down direction, and the upper end of the cylinder rod abuts against the bearing plate 6. The jacking cylinder 72 can provide stable support force for the bearing plate 6, without manual operation, so that the jacking and lowering operation of the bearing plate 6 is convenient and fast, and the guide column 61 can also balance the bearing plate 6.

[0062] In other embodiments, the lifting adjustment of the bearing plate 6 can also be realized by a lead screw transmission mode, which is widely used, and will not be described here.

[0063] Since the longitudinal movement of the longitudinal sliding trolley 100 is completely guided by the guide rail below the roller 2, when the installation of the guide rail deviates, the position of the box girder outer side steel form needs to be manually adjusted by artificial operation. In view of this, in the embodiment, the position of the mechanism seat plate 71 in the left-right direction is adjustable. By driving the mechanism seat plate 71 to move in the left-right direction as a whole, the box girder outer side steel form can be accurately adjusted to the preset position, and the construction personnel do not need to bear the gravity of the box girder outer side steel form for adjustment, so that the labor intensity is greatly reduced.

[0064] The adjustment mode of the mechanism base plate 71 can be various, for example, left and right adjustment can be realized by a slider linkage mechanism. Specifically, in the embodiment, a threaded sleeve 712 is formed at the lower end of the mechanism base plate 71; a transmission screw 11 is arranged on the mounting seat 1 and rotates along the left and right direction; and the threaded sleeve 712 is adapted to be sleeved on the transmission screw 11. The transmission screw 11 is rotated by external force, so as to drive the mechanism base plate 71 to move through the threaded sleeve 712, and compared with the slider linkage mechanism, the space for mechanism movement can be saved.

[0065] The above description is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields within the concept of the present application, and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A longitudinal skid, characterized in that The utility model relates to a box girder formwork movable locking device, including: Mounting seat is used to carry box girder outside steel mould; Multiple rollers are rotationally arranged on the lower end of the mounting seat along the left-right direction, and the multiple rollers include a brake wheel, the end face of the brake wheel is formed with multiple coupling recesses distributed along the circumferential direction; and Locking disc is movably mounted to the mounting seat along the left-right direction by an elastic member, the locking disc is provided with a locking protrusion, and the locking protrusion is arranged corresponding to the coupling recess; During the forward rotation stroke of the brake wheel, the corresponding coupling recess can extrude the locking protrusion along the left-right direction to push the locking disc to avoid the brake wheel; During the reverse rotation stroke of the brake wheel, the elastic member can drive the locking disc to approach the brake wheel until the locking protrusion is clamped into the corresponding coupling recess to limit the reverse rotation of the brake wheel; The coupling recess has a first abutting surface and a second abutting surface opposite along the circumferential direction of the locking disc; The locking protrusion is rotationally arranged along the axis of the locking disc in the radial direction, and during the rotation stroke, the locking protrusion has a first locking position blocking the forward rotation of the brake wheel and a second locking position blocking the reverse rotation of the brake wheel, the locking protrusion has a first stop surface, a second stop surface, and an extrusion inclined surface, the opposite sides of the extrusion inclined surface are respectively adjacent to the first stop surface and the second stop surface; When the first locking position is reached, the first stop surface is opposite to the first abutting surface, and the extrusion inclined surface is arranged towards the second abutting surface; When the second locking position is reached, the second stop surface is opposite to the second abutting surface, and the extrusion inclined surface is arranged towards the first abutting surface; The longitudinal sliding trolley further comprises an adjusting mechanism for driving the locking protrusion to switch between the first locking position and the second locking position.

2. The longitudinal skid as claimed in claim 1, wherein, The adjusting mechanism comprises: A gear portion coaxially arranged in the locking protrusion; and A rack portion arranged in a ring shape and rotationally arranged along the axis of the locking disc in the left-right direction, the rack portion is engaged with the gear portion.

3. The longitudinal skid as claimed in claim 2, wherein, The locking protrusion and the gear portion one-to-one correspond to form a locking driving group, the locking driving group is arranged corresponding to multiple coupling recesses, and the gear portions in multiple locking driving groups are all engaged with the rack portion.

4. The longitudinal skid as claimed in claim 3, wherein, The rack portion is formed with a limiting hole, the limiting hole is elongated along the circumferential direction of the locking disc, during the rotation stroke, the rack portion has a first limit position driving the locking protrusion to move to the first locking position and a second limit position driving the locking protrusion to move to the second locking position; The locking disc is formed with a limiting column corresponding to the limiting hole and two insertion holes, in the circumferential direction of the locking disc, the two insertion holes are respectively arranged on the two sides of the limiting column, and two insertion columns can be selectively arranged in the two insertion holes to be respectively supported in the limiting hole along the two sides of the elongated direction by the insertion column and the limiting column when the rack portion is in the first limit position or the second limit position.

5. The longitudinal skid as defined in claim 1, wherein, The locking disc is provided with a position giving groove having two opposite supporting surfaces, and the locking convex part is rotatably arranged in the position giving groove; In the first locking position, the second stop surface of the locking convex part abuts against one of the supporting surfaces; In the second locking position, the first stop surface of the locking convex part abuts against the other of the supporting surfaces.

6. The longitudinal skid as defined in claim 1, wherein, The longitudinal sliding trolley further comprises a bearing plate arranged above the mounting seat and adjustable in height in the up-down direction to carry the outer side steel form of the box girder.

7. The longitudinal skid as claimed in claim 6, wherein, The bearing plate is provided with a downwardly extending guide column; A cylinder jacking mechanism is arranged between the bearing plate and the mounting seat, and the cylinder jacking mechanism comprises: a mechanism seat plate arranged on the mounting seat and provided with a guide hole penetrating in the up-down direction, and the guide column is correspondingly inserted into the guide hole; and a jacking cylinder arranged on the mechanism seat plate and having a cylinder rod telescopically arranged in the up-down direction, and the upper end of the cylinder rod abuts against the bearing plate.

8. The longitudinal skid as defined in claim 7, wherein, The position of the mechanism seat plate in the left-right direction is adjustable.

9. The longitudinal skid as claimed in claim 8, wherein, The lower end of the mechanism seat plate is provided with a threaded sleeve; The mounting seat is provided with a transmission screw rotatably arranged along an axis in the left-right direction, and the threaded sleeve is fitted on the transmission screw.

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