Protective structure of aerial work experience platform for track construction

Abstract

The invention relates to the technical field of aerial work platforms, and particularly discloses an aerial work experience platform protection structure for track construction, which comprises a moving vehicle and a driving device arranged on the moving vehicle, the protection structure comprises locking grooves formed in the two sides of the pushing and ejecting block, a first locking mechanism fixedly arranged on the moving vehicle and a second locking mechanism arranged on the first locking mechanism. According to the high-altitude operation experience platform protection structure for track construction, if the platform inclines in the width direction of the moving vehicle, the sliding frame can move under the dead weight, the first lock head at the high position can lock the pushing and ejecting block, and if the platform inclines in the length direction of the moving vehicle, the driving rod can move under the dead weight; the inclined face at the high position can make contact with the sliding strip and push the sliding strip to move, the sliding strip moves to drive the second lock head to lock the pushing block, the pushing block cannot move, the lifting platform cannot be driven to ascend, and the protection effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of aerial work platforms, and in particular to a protective structure of an aerial work experience platform for track construction. Background Art

[0002] Rail transit is widely accepted and used by people for its large carrying capacity, safety and convenience. Railway tracks are an important part of railway transportation, and are mainly composed of rails, sleepers, fixtures and foundation stones. Tracks must be regularly maintained to ensure traffic safety, but with the intensification of global climate change, extreme weather events such as typhoons, heavy rains and ice and snow weather have occurred frequently. These extreme weather events have brought unprecedented challenges to the safety and stable operation of urban rail transit systems. These weather events may not only cause service interruptions, but also cause long-term damage to rail facilities, which will seriously affect the operating efficiency of the entire city and the daily lives of residents, which also makes the track maintenance cycle more frequent.

[0003] In track maintenance, especially when maintaining elevated tracks, maintenance personnel need to use a lifting device to perform aerial work, and the aerial work platform for construction can assist personnel and objects to be lifted to the aerial construction position. For example, the Chinese patent document with publication number CN109736583A discloses a scissor lift protection system and its construction method, including a lifting device, a top platform arranged on the upper part of the lifting device, a telescopic arm with a tail end arranged on the side of the top platform, and a protective device arranged at the front end of the telescopic arm. The device can assist personnel and objects to be lifted to the aerial construction position.

[0004] The aerial work platform needs to be placed on a level ground before the lifting operation can be carried out. However, in the relevant technology, the levelness of the ground is generally roughly judged by personnel's perception. If there are some potholes on the ground and the wheels fall into the potholes, this will cause the body of the vehicle to tilt. A small tilt on the ground will become a large displacement and tilt when it is transmitted to the high-position work platform. In mild cases, the workers will feel insecure. In severe cases, because the aerial work platform is very high when it is raised, the center of gravity is high, and there is a risk of overturning. Summary of the invention

[0005] The present invention provides a protective structure for an aerial work experience platform for track construction, aiming to solve the problem in the related art that the horizontality of the ground is difficult to control accurately, which easily causes the vehicle body to tilt, and when it is transmitted to the high-position working platform, it will become a large displacement and tilt, and there is a risk of overturning.

[0006] The protective structure of the aerial work experience platform for track construction of the present invention comprises a mobile vehicle, a base is fixedly provided on the mobile vehicle, a lifting mechanism capable of being extended up and down is provided on the base, a bearing platform is provided on the top of the lifting mechanism, a moving shaft is provided on the lifting mechanism, and the movement of the moving shaft can drive the entire lifting mechanism to extend up and down, and also comprises:

[0007] A driving device is arranged on the moving vehicle, the driving device has a movable ejecting block, and the ejecting block is fixed on the moving shaft;

[0008] The protection structure includes lock grooves provided on both sides of the ejection block, a first locking mechanism fixed on the moving vehicle, and a second locking mechanism provided on the first locking mechanism;

[0009] The first locking mechanism has a sliding frame that can move along the width direction of the moving vehicle, and the sliding frame has two first locks. When the sliding frame is tilted along the width direction of the moving vehicle, the sliding frame can move under its own weight, and the first lock at the highest position can move into the lock groove;

[0010] The second locking mechanism is provided with two slide bars and two driving rods that can move along the length direction of the moving vehicle. The two slide bars are respectively slidably arranged on both sides of the sliding frame with a single degree of freedom. A second locking head is fixedly arranged at one end of each slide bar close to the pushing block. The two driving rods are oriented in opposite directions. Each driving rod has an inclined surface. When the driving rod is tilted along the length direction of the moving vehicle, the driving rod can move under its own weight. The inclined surface at the highest position can contact the slide bar and push the slide bar to move. The movement of the slide bar can drive the second locking head to move into the lock groove.

[0011] Preferably, the driving device also has a hydraulic cylinder, a hydraulic oil tank, a three-way interface and a switching mechanism, the hydraulic cylinder and the hydraulic oil tank are both fixedly mounted on the mobile vehicle, the hydraulic oil tank contains hydraulic oil, a hydraulic pump is fixedly mounted on the hydraulic oil tank, the liquid inlet end of the hydraulic pump is connected to the hydraulic oil in the hydraulic oil tank, the liquid outlet end of the hydraulic pump is fixedly connected to the first interface of the three-way interface, the liquid supply port of the hydraulic cylinder is fixedly connected to the second interface of the three-way interface, the third interface of the three-way interface is connected to the hydraulic oil tank through the switching mechanism, the switching mechanism can control the connection and closing function of the third interface of the three-way interface with the hydraulic oil tank, and the ejection block is fixedly mounted on the movable end of the hydraulic cylinder.

[0012] Preferably, the switching mechanism includes a valve seat, an oil through hole is provided on the valve seat, the upper end of the oil through hole is connected to the third interface of the three-way interface, and the lower end of the oil through hole is connected to the hydraulic oil tank. The valve seat is provided with a slot passing through the oil through hole, and a sealing member is slidably connected with a single degree of freedom in the slot. The sealing member is provided with two through holes, and the two through holes are respectively located on both sides of the oil through hole, and a fourth elastic member is fixed between both sides of the seal and the valve seat.

[0013] Preferably, a rubber layer is provided on the surface of the sealing member, and the rubber layer abuts against the inner wall of the slot.

[0014] Preferably, the first locking mechanism also has a fixed seat fixed on the moving vehicle, the length direction of the fixed seat is consistent with the width direction of the moving vehicle, a slot is provided on the fixed seat, the sliding frame is slidably connected in the slot with a single degree of freedom, and a first elastic member is fixed between the inner wall of the slot and both sides of the sliding frame.

[0015] Preferably, at least two grooves are formed at the bottom of the sliding frame, and a supporting bead is rollingly connected in each groove at the bottom of the sliding frame, and the supporting bead is rollingly connected to the bottom of the card slot.

[0016] Preferably, a counterweight block is also fixedly provided on the sliding frame.

[0017] Preferably, the second locking mechanism also has two second elastic members, two sleeves and two third elastic members, the two second elastic members are respectively fixed between the two second lock heads and the sliding frame, the two sleeves are respectively fixed on both sides of the fixed seat, the two driving rods are respectively, and single-degree-of-freedom slidingly arranged in the two sleeves, and the two third elastic members are respectively fixed between the two driving rods and the inner wall of the sleeve.

[0018] Preferably, the valve seat is fixed on a fixed seat, and each of the second lock heads is also fixed with a connecting plate, and the two connecting plates are respectively opposite to the two ends of the two sealing members, and the movement of the connecting plates can push the sealing members to move.

[0019] Preferably, the mobile vehicle comprises a frame, two rail wheels are mounted on both sides of the frame, and four driving rail wheels can overlap on rails for rolling.

[0020] The beneficial effects of the present invention are as follows: after the mobile vehicle is placed, if the aerial work experience platform tilts in the direction of the width of the mobile vehicle, the sliding frame can move under its own weight, and the first locking head at a higher position can move into the locking groove to lock the push-up block, so that the push-up block can no longer move, and the lifting mechanism can not be extended and lifted; if the aerial work experience platform tilts in the direction of the length of the mobile vehicle, the driving rod can move under its own weight, and the inclined surface at a higher position can contact the sliding bar and push the sliding bar to move, and the movement of the sliding bar can drive the second locking head to move into the locking groove, which can also lock the push-up block, and also can prevent the push-up block from moving, so that the lifting mechanism can not be extended and lifted, thereby achieving the effect of protecting when the aerial work experience platform tilts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0022] Figure 2 It is a structural schematic diagram of a lifting platform and a driving device in a specific embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of a driving device in a specific embodiment of the present invention.

[0024] Figure 4 It is a three-dimensional cross-sectional view of a valve seat according to a specific embodiment of the present invention.

[0025] Figure 5 It is a structural schematic diagram of a switch mechanism in a specific embodiment of the present invention.

[0026] Figure 6 It is a structural schematic diagram of a protective structure of a specific embodiment of the present invention.

[0027] Figure 7 It is a three-dimensional cross-sectional view of the ejection block and the first locking mechanism in a specific embodiment of the present invention.

[0028] Figure 8 It is a schematic structural diagram of a first locking mechanism and a second locking mechanism in a specific embodiment of the present invention.

[0029] Fig. 9 It is a three-dimensional cross-sectional view of a sleeve and a driving rod according to a specific embodiment of the present invention.

[0030] Reference numerals:

[0031] 10. Mobile vehicle; 20. Lifting platform; 21. Base; 22. Lifting mechanism; 221. Moving shaft; 23. Carrying platform; 30. Driving device; 31. Hydraulic cylinder; 32. Hydraulic oil tank; 33. Hydraulic pump; 34. Three-way interface; 35. Switch mechanism; 351. Valve seat; 3511. Oil hole; 3512. Slot; 352. Seal; 3521. Through hole; 353. Fourth elastic member; 36. Pushing block; 40. Protective structure; 41. Locking groove; 42. First locking mechanism; 421. Fixed seat; 4211. Card slot; 422. Sliding frame; 4221. First locking head; 423. First elastic member; 424. Support bead; 425. Counterweight; 43. Second locking mechanism; 431. Sliding bar; 4311. Rod body; 4312. Roller; 432. Second locking head; 433. Second elastic member; 434. Sleeve; 435. Driving rod; 4351. Inclined surface; 436. Third elastic member; 437. Connecting plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 9 As shown, the protective structure of the aerial work experience platform for rail construction of the present invention includes a mobile vehicle 10, a lifting platform 20 is installed on the mobile vehicle 10, a driving device 30 is installed on the mobile vehicle 10, the driving device 30 can provide power to drive the lifting platform 20 to perform lifting actions, and a protective structure 40 is arranged on the mobile vehicle 10 and the driving device 30. When the lifting platform 20 is in a tilted state, the protective structure 40 can disconnect the transmission between the driving device 30 and the lifting platform 20, so that the lifting platform 20 cannot perform an ascending action.

[0034] refer to Figure 1 and Figure 2 As shown, the mobile vehicle 10 includes a frame, and two track wheels are installed on both sides of the frame. The four track wheels can be overlapped on the rails for rolling, so that the entire aerial work experience platform can be moved on the rails. To improve the mobility of the aerial work experience platform, the lifting platform 20 includes a base 21 fixedly connected to the frame, a lifting mechanism 22 is installed on the base 21, and a bearing platform 23 is installed on the top of the lifting mechanism 22. The bearing platform 23 can carry the experiencer, and the lifting mechanism 22 can extend upward as a whole to drive the bearing platform 23 to move upward to achieve the lifting effect.

[0035] The lifting mechanism 22 is composed of two sets of identical and parallel multi-layer X-shaped scissor assemblies arranged on both sides of the base 21. The scissor assemblies on the same layer are composed of two connecting rods, and the middle parts of the two connecting rods are hinged together through a rotating shaft so that they have a rotating pair. The adjacent two layers of scissor assemblies are hinged together through the rotating shafts arranged at both ends of the connecting rods. One end of a connecting rod in the bottom layer of the scissor assembly is hinged to the base 21 through a rotating shaft, and the other connecting rod in the bottom layer of the scissor assembly is rotatably connected to a moving shaft 221. The movement of the moving shaft 221 can drive the connecting rod to deflect. The transmission between them can drive the entire lifting mechanism 22 to extend and retract up and down, thereby realizing the function of driving the bearing platform 23 to move up and down. Similarly, one end of a connecting rod in the highest-level scissors-fork assembly is hinged to the bearing platform 23 through a rotating shaft, and another connecting rod in the highest-level scissors-fork assembly is rotatably connected with a sliding shaft, and the sliding shaft is slidably arranged on the bearing platform 23 with a single degree of freedom. It should be noted that a sliding groove arranged along the length direction of the bearing platform 23 is opened on the bearing platform 23, and the sliding shaft is slidably connected in the sliding groove on the bearing platform 23 with a single degree of freedom to limit the sliding shaft and improve the stability of the bearing platform 23.

[0036] refer to Figures 1 to 5 As shown, the driving device 30 includes a hydraulic cylinder 31, a hydraulic oil tank 32 and a three-way interface 34. The hydraulic cylinder 31 and the hydraulic oil tank 32 are both fixedly installed on the frame of the mobile vehicle 10. The hydraulic oil tank 32 contains hydraulic oil. A hydraulic pump 33 is fixedly installed on the hydraulic oil tank 32. The liquid inlet end of the hydraulic pump 33 is connected to the hydraulic oil in the hydraulic oil tank 32. The liquid outlet end of the hydraulic pump 33 is fixedly connected to the first interface of the three-way interface 34. The liquid supply port of the hydraulic cylinder 31 is fixedly connected to the second interface of the three-way interface 34. The third interface of the three-way interface 34 is connected to the hydraulic oil tank 32 through a switch mechanism 35. The switch mechanism 35 is installed on the protective structure 40. The switch mechanism 35 can control the connection or closing of the third interface of the three-way interface 34 with the hydraulic oil tank 32. The movable end of the hydraulic cylinder 31 is fixedly connected to a push block 36, and the push block 36 is welded to the movable shaft 221.

[0037] When the third interface of the three-way interface 34 is controlled by the switch mechanism 35 to be closed with the hydraulic oil tank 32, the hydraulic pump 33 is controlled to pump the hydraulic oil in the hydraulic oil tank 32 into the hydraulic cylinder 31, so that the hydraulic cylinder 31 extends and drives the push block 36 to move, and the movement of the push block 36 drives the moving shaft 221 to move, so as to realize the lifting action of the lifting platform 20; when the third interface of the three-way interface 34 is controlled by the switch mechanism 35 to be connected with the hydraulic oil tank 32, the lifting platform 20 descends under its own weight, and at the same time, the moving shaft 221 is reset to drive the push block 36 to reset , the push block 36 resets and moves to drive the hydraulic cylinder 31 to contract. During the contraction of the hydraulic cylinder 31, the hydraulic oil in the hydraulic cylinder 31 flows through the third interface of the three-way interface 34, and flows back to the hydraulic oil tank 32 through the opened switch mechanism 35; it should be noted that when the third interface of the three-way interface 34 is controlled by the switch mechanism 35 to be connected with the hydraulic oil tank 32, and then the hydraulic pump 33 is controlled to start, the hydraulic pump 33 will only transport the hydraulic oil in the hydraulic oil tank 32 and flow back to the hydraulic oil tank 32 through the switch mechanism 35, and the hydraulic oil will not enter the hydraulic pump 33.

[0038] Continue to refer Figures 3 to 5 As shown, the switch mechanism 35 includes a valve seat 351, and an oil hole 3511 is provided on the valve seat 351. The upper end of the oil hole 3511 is communicated with the third interface of the three-way interface 34 through a connecting pipe, and the lower end of the oil hole 3511 is communicated with the hydraulic oil tank 32 through a connecting pipe. A slot 3512 penetrating the oil hole 3511 is provided on the valve seat 351, and a sealing member 352 is connected in a single degree of freedom sliding manner in the slot 3512. It should be noted that a rubber layer is provided on the surface of the sealing member 352, and the rubber layer abuts against the inner wall of the slot 3512, so that the sealing member 352 and the inner wall of the slot 3512 are kept sealed, so that the hydraulic oil will not flow from the slot 351 2 and the gap between the sealing member 352 and the sealing member 352 is leaked, the sealing member 352 is provided with two through holes 3521, and the two through holes 3521 are respectively located on both sides of the oil through hole 3511, and a fourth elastic member 353 is fixedly arranged between both sides of the sealing member 352 and the valve seat 351. In this embodiment, the fourth elastic member 353 is a tension spring, and its elastic force can keep the two through holes 3521 respectively located on both sides of the oil through hole 3511, and push the sealing member 352 to move one of the through holes 3521 to a position connected with the oil through hole 3511, and the hydraulic oil can flow through the through holes 3521 and the oil through hole 3511, so that the switch mechanism 35 is in an open state.

[0039] refer to Figure 1 , Figures 6 to 9As shown, the protective structure 40 includes locking grooves 41 opened on both sides of the push-up block 36, a first locking mechanism 42 fixedly connected to the frame, and a second locking mechanism 43 arranged on the first locking mechanism 42. When the aerial work experience platform tilts along the width direction of the mobile vehicle 10, the first locking mechanism 42 can lock the push-up block 36 so that the push-up block 36 can no longer move; when the aerial work experience platform tilts along the length direction of the mobile vehicle 10, the second locking mechanism 43 can also lock the push-up block 36, so that the push-up block 36 can no longer move, thereby achieving the goal that when the aerial work experience platform tilts, the lifting platform 20 cannot rise, thereby achieving a protective effect.

[0040] Continue to refer Figure 6 and Figure 7 As shown, the first locking mechanism 42 includes a fixing seat 421 fixedly connected to the frame, the length direction of the fixing seat 421 is consistent with the width direction of the frame, a card slot 4211 is provided on the fixing seat 421, a sliding frame 422 is slidably connected with a single degree of freedom in the card slot 4211, and both sides of the top of the sliding frame 422 have first lock heads 4221, the two first lock heads 4221 are respectively located on both sides of the push-up block 36, and the two first lock heads 4221 are respectively opposite to the two lock slots 41, and the first The lock head 4221 moves in the direction of the lock slot 41 and can be inserted into the lock slot 41 to realize the locking function of the push-out block 36. The first elastic member 423 is fixedly connected between the two sides of the sliding frame 422 and the inner wall of the slot 4211. In the present embodiment, the first elastic member 423 is a spring. The elastic force of the first elastic member 423 can keep the sliding frame 422 balanced in the middle of the slot 4211 on the fixed seat 421, so that the two first lock heads 4221 remain respectively located on the two sides of the push-out block 36.

[0041] At least two grooves are provided at the bottom of the sliding frame 422, and support beads 424 are rollingly connected in each groove at the bottom of the sliding frame 422, and the support beads 424 are rollingly connected to the bottom of the slot 4211. When the sliding frame 422 moves in the slot 4211, the support beads 424 can roll to reduce the friction between the sliding frame 422 and the slot 4211. A counterweight block 425 is also welded on the sliding frame 422 to weight the sliding frame 422 and improve the sensitivity of the movement of the sliding frame 422.

[0042] Continue to refer Figure 6 , Figure 8 and Fig. 9As shown, the second locking mechanism 43 includes a slide bar 431 that is slidably connected to the top of the sliding frame 422 with a single degree of freedom and two sleeves 434 that are fixedly connected to the two sides of the fixed seat 421. It should be noted that the slide bar 431 is square, and a square hole that matches the slide bar 431 is opened on the sliding frame 422, so that the slide bar 431 can be restricted to slide in the square hole with a single degree of freedom. The end of each slide bar 431 close to the push-out block 36 is welded with a second lock head 432, and the second lock head 432 is welded with the first lock head 42 21 flush, two second lock heads 432 are respectively opposite to the two lock slots 41, and the second lock heads 432 can be inserted into the slot 4211 by moving in the direction of the lock slot 41, and a second elastic member 433 is fixedly connected between each second lock head 432 and the sliding frame 422, and in this embodiment, the second elastic member 433 is a tension spring, and a driving rod 435 is slidably connected with a single degree of freedom in each sleeve 434, and it should be noted that the two driving rods 435 are in opposite directions, and the length direction of the driving rod 435 is consistent with the length direction of the frame. The driving rod 435 has an inclined surface 4351, and when the driving rod 435 extends out of the sleeve 434 and moves, the inclined surface 4351 can contact one end of the slide bar 431 and push the slide bar 431 to move, and the movement of the slide bar 431 can drive the second lock head 432 to insert into the lock slot 41, and a third elastic member 436 is fixedly connected between the driving rod 435 and the inner wall of the sleeve 434, and in this embodiment, the third elastic member 436 is a tension spring.

[0043] It should be noted that the slide bar 431 includes a rod body 4311, one end of the rod body 4311 close to the ejection block 36 is welded to the second lock head 432, and the end of the rod body 4311 away from the ejection block 36 is rotatably connected to a roller 4312 via a rotating shaft, and the inclined surface 4351 can contact the roller 4312 on the slide bar 431. When the driving rod 435 contacts the roller 4312 and moves, the roller 4312 can roll with the movement of the driving rod 435 to reduce the friction between the slide bar 431 and the driving rod 435.

[0044] Continue to refer Figure 6 and Figure 8 As shown, each second lock head 432 is also fixedly connected with a connecting plate 437, and the two connecting plates 437 are respectively opposite to the two ends of the two sealing members 352. When the second lock head 432 moves, it can drive the connecting plates 437 to move synchronously, and the movement of the connecting plates 437 can push the sealing members 352 to move.

[0045] When the mobile vehicle 10 is placed horizontally, the experiencer stands on the bearing platform 23, and controls the third interface of the three-way interface 34 and the hydraulic oil tank 32 to be closed through the switch mechanism 35, and then controls the hydraulic pump 33 to pump the hydraulic oil in the hydraulic oil tank 32 into the hydraulic cylinder 31, so that the hydraulic cylinder 31 extends and drives the push block 36 to move, and the movement of the push block 36 drives the movement of the moving shaft 221. The movement of the moving shaft 221 can drive the connecting rod to deflect, and through the transmission between all the connecting rods, the entire lifting mechanism 22 can be driven to extend upward. This can drive the support platform 23 upward so that the experiencer can move upward; when the third interface of the three-way interface 34 is controlled by the switch mechanism 35 to be connected to the hydraulic oil tank 32, the lifting platform 20 descends under its own weight, and at the same time, the movable shaft 221 is reset to drive the push block 36 to reset, and the reset movement of the push block 36 drives the hydraulic cylinder 31 to contract. During the contraction of the hydraulic cylinder 31, the hydraulic oil in the hydraulic cylinder 31 flows through the third interface of the three-way interface 34 and flows back to the hydraulic oil tank 32 through the opened switch mechanism 35.

[0046] After the mobile vehicle 10 is placed, if the aerial work experience platform tilts along the width direction of the mobile vehicle 10, the two first lock heads 4221 are one high and one low, and the sliding frame 422 can move under its own weight, and the first lock head 4221 at a higher position can move into the lock groove 41 to lock the push-up block 36, so that the push-up block 36 can no longer move, and the lifting mechanism 22 can not be extended and lifted; if the aerial work experience platform tilts along the length direction of the mobile vehicle 10, the two second lock heads 432 are one high and one low, and the driving rod 435 can move under its own weight, and the inclined surface 4351 in the higher position can contact the slide bar 431 and push the slide bar 431 to move. The movement of the slide bar 431 can drive the second lock head 432 to move into the lock groove 41, and can also lock the push block 36, and can also make the push block 36 unable to move, so that the lifting mechanism 22 cannot be extended and lifted, so that when the aerial work experience platform is tilted, the lifting platform 20 cannot rise, nor will it drive the experience personnel to rise and be placed in a dangerous high altitude, so as to achieve the protection effect.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A protective structure for a high-altitude work experience platform for track construction, comprising a mobile vehicle, a base fixed on the mobile vehicle, a lifting mechanism capable of being extended up and down, a bearing platform on the top of the lifting mechanism, a moving shaft on the lifting mechanism, and the movement of the moving shaft can drive the entire lifting mechanism to extend up and down, characterized in that: Also includes: A driving device is arranged on the moving vehicle, the driving device has a movable ejecting block, and the ejecting block is fixed on the moving shaft; The protection structure includes lock grooves provided on both sides of the ejection block, a first locking mechanism fixed on the moving vehicle, and a second locking mechanism provided on the first locking mechanism; The first locking mechanism has a sliding frame that can move along the width direction of the moving vehicle, and the sliding frame has two first locks. When the sliding frame is tilted along the width direction of the moving vehicle, the sliding frame can move under its own weight, and the first lock at the highest position can move into the lock groove; The second locking mechanism is provided with two slide bars and two driving rods that can move along the length direction of the moving vehicle. The two slide bars are respectively slidably arranged on both sides of the sliding frame with a single degree of freedom. A second locking head is fixedly arranged at one end of each slide bar close to the pushing block. The two driving rods are oriented in opposite directions. Each driving rod has an inclined surface. When the driving rod is tilted along the length direction of the moving vehicle, the driving rod can move under its own weight. The inclined surface at the highest position can contact the slide bar and push the slide bar to move. The movement of the slide bar can drive the second locking head to move into the lock groove.

2. The protective structure of the aerial work experience platform for track construction according to claim 1 is characterized in that: The driving device also has a hydraulic cylinder, a hydraulic oil tank, a three-way interface and a switch mechanism. The hydraulic cylinder and the hydraulic oil tank are both fixedly mounted on the mobile vehicle. The hydraulic oil tank contains hydraulic oil. A hydraulic pump is fixedly mounted on the hydraulic oil tank. The liquid inlet end of the hydraulic pump is connected to the hydraulic oil in the hydraulic oil tank. The liquid outlet end of the hydraulic pump is fixedly connected to the first interface of the three-way interface. The liquid supply port of the hydraulic cylinder is fixedly connected to the second interface of the three-way interface. The third interface of the three-way interface is connected to the hydraulic oil tank through the switch mechanism. The switch mechanism can control the connection and closing function of the third interface of the three-way interface with the hydraulic oil tank. The ejection block is fixedly mounted on the movable end of the hydraulic cylinder.

3. The protective structure of the aerial work experience platform for track construction according to claim 2 is characterized in that: The switch mechanism includes a valve seat, an oil through hole is provided on the valve seat, the upper end of the oil through hole is communicated with the third interface of the three-way interface, and the lower end of the oil through hole is communicated with the hydraulic oil tank. The valve seat is provided with a slot passing through the oil through hole, and a sealing member is slidably connected with a single degree of freedom in the slot. The sealing member has two through holes, and the two through holes are respectively located on both sides of the oil through hole, and a fourth elastic member is fixed between both sides of the seal and the valve seat.

4. The protective structure of the aerial work experience platform for track construction according to claim 3 is characterized in that: A rubber layer is provided on the surface of the sealing member, and the rubber layer abuts against the inner wall of the slot.

5. The protective structure of the aerial work experience platform for track construction according to claim 3 is characterized in that: The first locking mechanism also has a fixed seat fixed on the moving vehicle, the length direction of the fixed seat is consistent with the width direction of the moving vehicle, the fixed seat is provided with a slot, the sliding frame is slidably connected in the slot with a single degree of freedom, and a first elastic member is fixed between the inner wall of the slot and both sides of the sliding frame.

6. The protective structure of the aerial work experience platform for track construction according to claim 5 is characterized in that: At least two grooves are formed at the bottom of the sliding frame, and a supporting bead is rollingly connected in each groove at the bottom of the sliding frame, and the supporting bead is rollingly connected to the bottom of the card slot.

7. The protective structure of the aerial work experience platform for track construction according to claim 6 is characterized in that: A counterweight block is also fixedly arranged on the sliding frame.

8. The protective structure of the aerial work experience platform for track construction according to claim 5 is characterized in that: The second locking mechanism also has two second elastic members, two sleeves and two third elastic members. The two second elastic members are respectively fixed between the two second lock heads and the sliding frame, the two sleeves are respectively fixed on both sides of the fixed seat, the two driving rods are respectively, and single-degree-of-freedom slidingly arranged in the two sleeves, and the two third elastic members are respectively fixed between the two driving rods and the inner wall of the sleeve.

9. The protective structure of the aerial work experience platform for track construction according to claim 8 is characterized in that: The valve seat is fixed on the fixed seat, and each of the second lock heads is also fixed with a connecting plate, and the two connecting plates are respectively opposite to the two ends of the two sealing members, and the movement of the connecting plates can push the sealing members to move.

10. The protective structure of the aerial work experience platform for track construction according to any one of claims 1 to 9, characterized in that: The mobile vehicle comprises a vehicle frame, two rail wheels are installed on both sides of the vehicle frame, and four driving rail wheels can be overlapped on the rails for rolling.

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