Rail operation platform

Abstract

The utility model discloses a rail operation platform which comprises a bearing piece, walking wheels, a connecting rod, a braking device and an operating rod. The adjustment of the braking force provided by the braking device to the walking wheels and the push-and-pull operation of the rail operation platform are carried out through the same part, when the rail operation platform needs to be moved, the push-and-pull operation of a user of the rail operation platform without power (driving the walking wheels) is necessary, and the operation is convenient. An acting force is applied to the operating rod before the operating rod is pushed and pulled (if the acting force is not applied, the braking force cannot be completely or partially released, and the pushing and pulling operation of a user is insufficient to drive the rail operation platform to move), so that the operating rod is linked with the braking device, and the braking force is completely or partially released; therefore, the state of the operating rod can truly reflect the intention of a user, and misjudgment is not likely to occur.

Description

Technical Field

[0001] The present application relates to the field of track operation, and in particular to a track operation platform. Background Art

[0002] Railway tracks are widely used in various fields. Tracks provide the basis for the operation of railway vehicles, overhead lines and other power supply systems provide energy for railway vehicles, and signal control systems provide control for the operation of railway vehicles. It is often necessary to construct and repair tracks, power supply systems, and signal control systems, because there are usually no other roads around the railway for driving (for example, railways are built in tunnels, on rivers, and in the wild without roads).

[0003] During construction and maintenance, construction workers are usually required to use various construction tools (such as wrenches, rail saws, drilling machines, etc.) to check or replace some parts of existing tracks, power supply systems and signal control systems. In order to carry construction workers, construction tools and construction materials (such as contact wires, suspension wires, various wire clamps, etc.), the existing technology is usually achieved by a work vehicle that can travel along the rails, such as the Chinese patent application with authorization announcement number CN201472387U (hereinafter referred to as D1 for convenience of description).

[0004] Continuing with D1 as an example, for the purpose of traveling along the track, track wheels that can roll along the rails are installed at the bottom of the frame; for the purpose of remaining fixed relative to the track, a hydraulically driven brake mechanism is provided, which has at least the following technical problems: it is necessary to separately provide hydraulic and electrical components such as oil pumps, oil pipes and power-off switches to provide power for the brake mechanism, and the structure is bulky, resulting in an increase in weight and volume, which is not conducive to its transportation, transshipment, installation on the track and removal from the track, especially as mentioned above, there are usually no roads near the track for vehicles to travel on, and the vehicle cannot be transported or hoisted with the help of a vehicle; the maintenance and release of the brake is controlled by whether the driver is sitting in the seat, and there is at least the following misjudgment situation: if the driver or other objects are pressing on the seat, but it is only temporary and the brake state does not need to be released, it is mistakenly judged as the brake release, resulting in the incorrect release of the brake, causing a safety hazard.

[0005] Therefore, it is urgent to develop a track operating platform to solve the above-mentioned technical problems. Utility Model Content

[0006] In order to avoid misjudgment of braking and releasing the brake, so that the braking and releasing the brake are strictly consistent with the user's intention, the present application provides a track work platform, including:

[0007] bearing member;

[0008] A running wheel rotatably mounted on the bottom of the bearing member;

[0009] A connecting rod having a first end and a second end, wherein the first end of the connecting rod is fixed to the bearing member so as to be maintained in a push-pull position, and the second end of the connecting rod can be extended to the vicinity of an operating position in the push-pull position;

[0010] a braking device configured to brake at least one of the travel wheels;

[0011] An operating rod is installed on the second end of the connecting rod so as to be switchable between a braking position and an unlocking position, and the operating rod acts on the braking device so that the braking device brakes at least one of the running wheels in the braking position and releases the brake on each of the running wheels in the unlocking position.

[0012] Furthermore, the above-mentioned rail operating platform also includes a first elastic member, which acts on the connecting rod and the operating rod respectively, and is used to keep the operating rod in the braking position through elastic restoring force in the absence of external force, and enable the operating rod to reach the unlocking position from the braking position when the elastic restoring force is overcome by external force.

[0013] Further, the first end of the connecting rod is switchably mounted on the bearing member between the push-pull position and the storage position, wherein:

[0014] In the storage position, the connecting rod is retracted into the supporting member.

[0015] Furthermore, the first end of the connecting rod is rotatably connected to the bearing member, and the connecting rod rotates relative to the bearing member to switch between the push-pull position and the storage position.

[0016] Furthermore, the first end of the connecting rod is rotatably mounted on the supporting member around a first axis, the first axis is lower than the upper surface of the supporting member, and the first end of the connecting rod forms an avoidance portion to eliminate the height difference between the first axis and the upper surface of the supporting member.

[0017] Furthermore, the bearing member is provided with an escape opening at a position corresponding to the connecting rod, so as to provide an escape space for the connecting rod to switch from the push-pull position to the storage position.

[0018] Furthermore, the bearing member comprises:

[0019] The frame is a hollow structure, and the travel wheels are fixed to the frame;

[0020] The bottom plate is fixed to the upper surface of the frame and at least partially blocks the hollowing of the frame.

[0021] Furthermore, the bearing member further comprises a side stopper, wherein the side stopper is arranged in a ring shape around the edges of the frame and the bottom plate, and the side stopper is higher than the frame and the bottom plate.

[0022] Furthermore, the above-mentioned track working platform also includes at least one brake block, any one of which is installed on any one of the supporting member, the connecting rod and the operating rod by quick release, and the brake block is used to prevent the walking wheel from moving along the track by being installed on the track.

[0023] Further, the brake block is wedge-shaped and has:

[0024] The bottom surface can be placed on the top of the rail;

[0025] The inclined surface forms an acute angle with the bottom surface so as to support the traveling wheel from the front or the rear.

[0026] Furthermore, at least one of the running wheels has a taper with a larger inner end and a smaller outer end, and the inclined surface fits the running wheel with the taper.

[0027] Furthermore, the brake block is a block structure made of elastic material.

[0028] Further, the braking device comprises a friction pair assembly and a brake cable, the brake cable acts on the friction pair assembly, and the brake cable is configured as follows:

[0029] When being pulled toward the travel wheel, the friction pair assembly is coupled to brake at least one of the travel wheels;

[0030] When being pulled away from the travel wheels, the friction pair components are fully or partially decoupled to not brake or partially brake all the travel wheels.

[0031] Furthermore, the friction pair assembly comprises:

[0032] a first friction member;

[0033] A second friction member is fixed to the travel wheel;

[0034] a second elastic member, providing a force for separating the first friction member from the second friction member;

[0035] The clutch member is acted upon by the brake cable and the second elastic member and has a distal end and a proximal end, wherein:

[0036] In the braking position, the first friction member abuts against the distal end to provide a pressure to press the first friction member against the second friction member;

[0037] In the unlocked position, the first friction member abuts against the proximal end, so that the first friction member is out of contact with the second friction member.

[0038] Furthermore, the friction pair assembly further comprises an abutment shaft, wherein:

[0039] The first friction members are two and are arc-shaped and buckled together. The first ends of the two first friction members are rotatably mounted on the abutment shaft, and the clutch member abuts between the second ends of the two first friction members.

[0040] The second elastic member is fixed between the two first friction members, and provides a pulling force for the two first friction members to break away from contact with the second friction member.

[0041] Further, there are two second elastic members, one of which is arranged close to the abutment shaft, and the other is arranged close to the clutch member.

[0042] Furthermore, an extending direction of the second elastic member is perpendicular to a rotation axis of the first friction member.

[0043] Further, in the push-pull position, the extending direction of the connecting rod is perpendicular to the upper surface of the bearing member.

[0044] Furthermore, the operating rod is provided with a handle portion for an operator to push the track working platform to move along the rails.

[0045] Further, in the braking position, the operating rod is located obliquely upward; in the unlocking position, the operating rod is substantially horizontal.

[0046] Furthermore, there are two connecting rods which are arranged at a distance from each other, and both ends of the operating rod are respectively connected to the second ends of the two connecting rods.

[0047] Furthermore, the operating rod includes an operating section in the middle and connecting sections at both ends, wherein:

[0048] The connecting section is connected to the second end of the connecting rod;

[0049] The operating section has at least one straight extension.

[0050] Compared with the prior art, the beneficial effects of this application are:

[0051] In the initial state (without user intervention), the operating rod is linked to the brake device under the elastic restoring force of the first elastic member, and the brake device brakes at least one running wheel so that the operating rod can be kept in the braking position to avoid undesired rolling along the track, that is, to avoid the rolling causing the work to be unable to proceed or even traffic accidents (especially on a sloped track);

[0052] When the operation is completed and the track work platform needs to be moved, the user applies a force to the operating lever, under which the elastic restoring force of the first elastic member is overcome, and the operating lever can move to any position between the braking position and the unlocking position. At this position, the braking device does not brake all the running wheels or at least reduces the braking force, so that the track work platform can be pushed and pulled without braking resistance (the operating lever moves to the unlocking position) or with partial braking resistance (the operating lever moves to any position before the unlocking position, and partial braking force is provided compared to the braking position, which is equivalent to providing damping for the movement of the track work platform);

[0053] The switching between the braking position and the unlocking position and the switching between any positions between the braking position and the unlocking position are achieved by operating the operating lever. The pushing and pulling operations of the track working platform are also achieved by operating the operating lever, that is, the adjustment of the braking force (full braking force, partial braking force and no braking force) and the pushing and pulling operations are achieved by operating the same part, so that the state of the operating lever can truly reflect the user's intention and there is no possibility of misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to make the advantages of the present application more easily understood, the present application briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the present application and therefore should not be considered as limiting the scope of protection thereof. The present application is described and explained with additional characteristics and details through the accompanying drawings.

[0055] Figure 1 It is a three-dimensional structural schematic diagram of a first perspective of an embodiment of a track work platform, wherein: the connecting rod is in a push-pull position, the operating rod is in a braking position, and full braking force is provided to the two running wheels;

[0056] Figure 2 for Figure 1 A partial enlarged view of the middle area Z;

[0057] Figure 3 for Figure 1 A schematic diagram of a three-dimensional structure from a second viewing angle;

[0058] Figure 4 for Figure 3 A partial enlarged view of the middle area Z;

[0059] Figure 5 for Figure 1 A schematic diagram of the three-dimensional structure from a third-person perspective, showing the posture of the running wheels when placed on a non-slope track, indicating that the operating rod extends diagonally upward;

[0060] Figure 6 It is a working principle diagram of the friction pair assembly in the braking position, wherein: the distal end abuts between the two first friction members;

[0061] Figure 7 The figure shows the posture of the running wheels when they are placed on a non-slope track, indicating that the operating lever is basically horizontal. At this time, the operating lever is in the unlocked position, and the brake device releases the brakes on the two running wheels;

[0062] Figure 8 It is a working principle diagram of the friction pair assembly in the unlocked position, wherein: the proximal end abuts between the two first friction members;

[0063] Fig. 9 for Figure 7 Schematic diagram of the operating lever releasing the coupling of the friction pair assembly through the brake cable in the state.

[0064] The reference numerals are as follows:

[0065] 1. Carrying member; 11. Frame; 12. Bottom plate; 13. Side stop; 131. Avoidance opening; 14. Support member; 141. Rotation space; 15. Locking member;

[0066] 2. Traveling wheels;

[0067] 3. Connecting rod; 31. First end of connecting rod; 32. Second end of connecting rod; 33. Avoiding portion;

[0068] 41. Friction pair assembly; 411. First friction member; 4111. First end of first friction member; 41111. Semicircular groove; 4112. Second end of first friction member; 412. Second friction member; 413. Second elastic member; 414. Clutch member; 4141. Far end; 4142. Near end; 415. Abutment shaft; 42. Brake cable;

[0069] 5. operating rod; 51. operating section; 511. straight extension; 52. connecting section;

[0070] 6. a first elastic member;

[0071] 7. First axis;

[0072] 81, brake block; 811, bottom surface; 812, inclined surface; 82, connecting plate; 83, first connecting member; 84, second connecting member;

[0073] 9. Limiting parts. DETAILED DESCRIPTION

[0074] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application embodiments, some technical features well known in the art are not described.

[0075] In order to thoroughly understand the implementation of the present application, a detailed structure will be presented in the following description. Obviously, the implementation of the implementation of the present application is not limited to the specific details familiar to those skilled in the art. The preferred implementation of the present application is described in detail below, but in addition to these detailed descriptions, the present application may also have other implementations.

[0076] In the description of the present application, the term "A and / or B" represents all possible combinations of A and B, such as just A, just B, or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B", which may include just A, just B, or A and B. The singular terms "one" and "this" may also include plural forms. The orientations or positional relationships indicated by the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and do not require that the present application must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0077] The embodiments of the present application are further described in detail below with reference to the accompanying drawings:

[0078] The utility model embodiment discloses a track operation platform, see Figures 1 to 9, which includes a bearing 1, a running wheel 2, a connecting rod 3, a braking device and an operating rod 5. The adjustment of the braking force provided by the braking device to the running wheel 2 and the push-pull operation of the track work platform are all performed through the same part. When the track work platform needs to be moved, the push-pull operation of the user of the track work platform as an unpowered (driving running wheel 2) track work platform is necessary. Before pushing and pulling the operating rod 5, a force is applied to the operating rod 5 (if the force is not applied, the braking force cannot be completely or partially released, and the user's push-pull operation is not enough to drive the track work platform to move) so that the operating rod 5 is linked with the braking device, and the braking force is completely or partially released, so that the state of the operating rod 5 can truly reflect the user's intention, and it is impossible to make a misjudgment.

[0079] The carrier 1 provides a large surface area. Figure 1 , so that it can load personnel, work tools, work materials, etc. When the track work platform is placed on the track, the surface is basically parallel to the track surface.

[0080] The running wheel 2 (may be rotatably mounted on the bottom of the carrier 1 through a bearing, etc.), see Figure 1 and Figure 3 The running wheels 2 can lift the carrier 1 upwards, and at the same time can roll along the track with the help of the user's force on the operating rod 5. Regarding the arrangement of the running wheels 2, the figure shows four running wheels 2, which are arranged in a rectangular shape. The carrier 1 is also arranged in a rectangular shape, and the running wheels 2 are arranged at the four vertex positions of the carrier 1. It is known to those skilled in the art that the number and arrangement of the running wheels 2 can also be other ways, and the carrier 1 can also be other shapes, which will not be listed one by one.

[0081] The connecting rod 3 has a first end and a second end. Figure 3 , the first end 31 of the connecting rod is fixed to the bearing member 1 to maintain the push-pull position, and the second end 32 of the connecting rod can extend to the vicinity of the operating position in the push-pull position, and the operating rod 5 is fixed to the second end 32 of the connecting rod, that is, the operating rod 5 is also near the operating position, and the operating position means that after the track work platform is placed on the track, the user's hand can easily grasp the operating rod 5. As shown in the figure, in the horizontal direction, the connecting rod 3 is located in front of or behind the extension direction of the track, and in the vertical direction, the height from the operating rod 5 to the bottom of the running wheel 2 is between 50cm and 120cm.

[0082] The braking device can brake one running wheel 2 or two or more running wheels 2. The figure shows that two running wheels 2 are braked, and the two braked running wheels 2 are adjacent to the operating rod 5, so that the transmission path between the operating rod 5 and the braking device is the shortest, which provides the possibility for lightweight design of the transmission mechanism between the two. At the same time, the transmission synchronization is high, the delay is reduced as much as possible, and the braking force adjustment sensitivity is high.

[0083] The operating lever 5 is mounted on the connecting rod 3 so as to be switchable between a braking position and an unlocking position. Figures 1 to 9 , the braking device brakes at least one running wheel 2 in the braking position (such as Figures 1 to 6 As shown), the brake device releases the brakes on all the running wheels 2 in the unlocked position (as shown Figure 7 , Figure 8 and Fig. 9 shown).

[0084] The operating rod 5 is provided with a handle for the operator to push the track work platform to move along the rails, that is, the operating rod 5 is used to switch the braking and unlocking states of the braking device, and is also used to push and pull the track work platform along the rails.

[0085] Continue to see Figures 1 to 6 The first elastic member 6 is installed between the connecting rod 3 and the operating rod 5, and is configured as follows: in the initial state (without user intervention), the operating rod 5 is linked to the braking device under the elastic restoring force of the first elastic member 6, and the braking device brakes at least one running wheel 2 so that the operating rod 5 can be kept in the braking position to avoid unexpected rolling along the track, that is, to avoid the rolling causing the operation to be unable to proceed or even traffic accidents (especially on sloped tracks).

[0086] Continue to see Figures 7 to 9 The first elastic member 6 is also configured (through its free state length, elastic modulus, maximum stretching length or minimum compression length, etc.) as follows: when the operation is completed and the track working platform needs to be moved, the user applies a force to the operating rod 5, under which the elastic restoring force of the first elastic member 6 is overcome, and the operating rod 5 can move to any position between the braking position and the unlocking position. In this position, the braking device does not brake all the running wheels 2 or at least reduces the braking force, so that the track working platform can be pushed and pulled without braking resistance (the operating rod 5 moves to the unlocking position) or with partial braking resistance (the operating rod 5 moves to any position before the unlocking position, providing partial braking force compared to the braking position, which is equivalent to providing damping for the movement of the track working platform).

[0087] Continue to see Figures 7 to 9 The first elastic member 6 is also configured to overcome the elastic restoring force of the first elastic member 6 by means of the user's operation, so that the operating rod 5 can be maintained at any intermediate position between the braking position and the unlocking position, thereby providing partial braking force. The track work platform as a whole can be pushed and pulled with damping. Once the user's pushing and pulling force is removed, the track work platform can stop moving in a short time under the action of the partial braking force, which is conducive to accurately controlling the moving position and reducing the braking distance.

[0088] Continue to see Figures 1 to 6 One way to keep the operating rod 5 in the braking position is that the elastic restoring force of the first elastic member 6 (obtained by pre-stretching or pre-compression) is greater than the weight of the operating rod 5 itself (and the sum of the force applied to the operating rod 5 by the braking device), and the operating rod 5 is kept in the braking position under the elastic restoring force of the first elastic member 6 and the weight of the operating rod 5 itself. Similarly, in order to reduce the braking force, the user applies a force (as shown in the figure, the operation is to press down the operating rod 5), and the first elastic member 6 is stretched or compressed more, so that the operating rod 5 can be switched to the unlocking position or any intermediate position before the unlocking position, respectively achieving the effects of releasing the brake and releasing part of the brake.

[0089] Continue to see Figure 1 and Figure 3 One structure of the bearing member 1 is that it includes a frame 11 and a bottom plate 12. The running wheels 2 are fixed to the frame 11. The frame 11 provides support for the entire track work platform. The frame 11 is a hollow structure, which meets the purpose of strength and can reduce weight. The bottom plate 12 is fixed to the upper surface of the frame 11 and at least partially blocks the hollow of the frame 11 (the figure shows a completely blocked situation), so that the user or the object is placed on the upper surface of the bottom plate 12 without rolling down from the hollow.

[0090] Continue to see Figure 1 and Figure 3 In consideration of stable movement and easy loading and unloading of objects, the height of the carrier 1 is relatively low, that is, it is arranged close to the running wheel 2 in the height direction. In order to allow the operating rod 5 to extend to a position convenient for the user to operate, the connecting rod 3 must have a certain height. When not in use, the connecting rod 3 and the operating rod 5 occupy space in the height direction. At the same time, they are easily squeezed and hit during transportation, causing deformation or even breakage of the connecting rod 3 and the operating rod 5. Based on this concept, the inventor has designed a way that the connecting rod 3 can be stored in the frame 11 and / or the bottom plate 12 when not in use. One implementation of this concept is that the first end 31 of the connecting rod is switchably mounted on the carrier 1 between a push-pull position and a storage position. In the storage position, the connecting rod 3 can be attached to the frame 11 or the bottom plate 12.

[0091] Continue to see Figure 1 and Figure 3 The carrier 1 may further include a side stopper 13, which is arranged in a ring shape around the edge of the frame 11 and the bottom plate 12, and the side stopper 13 is higher than the frame 11 and the bottom plate 12. The side stopper 13 prevents a user or other objects from sliding off the edge of the carrier 1.

[0092] As described above, taking into account the storage of the connecting rod 3, the supporting member 1 or the side block 13 is provided with an avoidance opening 131 at the position corresponding to the connecting rod 3, so as to provide avoidance space for the connecting rod 3 to switch from the pushing and pulling position (as shown in the figure, the height direction of the connecting rod 3 is basically perpendicular to the state of the supporting member 1) to the storage position.

[0093] Continue to see Figure 1 and Figure 3 A connection method between the connecting rod 3 and the frame 11 can be: a support member 14 is fixed on the frame 11, and a rotation space 141 for the connecting rod 3 to rotate is formed in the support member 14. The first end 31 of the connecting rod is installed in the support member 14 by a hinge. The locking member 15 (such as a spring pin) passes through the through hole formed on the support member 14 and the through hole formed in the connecting rod 3 to position the connecting rod 3 in its push-pull position. When storage is required, the locking member 15 is removed, and the connecting rod 3 is rotated in a direction close to the frame 11 until it is attached to the frame 11 (not shown in the figure) or the bottom plate 12 (as shown in the figure) and reaches the storage position.

[0094] Continue to see Figure 1 and Figure 3 In order to improve the stability of the connecting rod 3 and reduce the height of the connecting rod 3 after storage, the first end 31 of the connecting rod is rotatably mounted on the support member 14 around the first axis 7 which is lower than the upper surface of the bottom plate 12. If the connecting rod 3 wants to rotate to the storage position (close to the upper surface of the bottom plate 12) at this time, it will be blocked because the first axis 7 is lower than the upper surface of the bottom plate 12. Based on this consideration, the first end 31 of the connecting rod forms an avoidance portion 33 to eliminate the height difference between the first axis 7 and the upper surface of the bottom plate 12. As shown in the figure, one structure of the avoidance portion 33 is a curved structure, such as a 90° curve.

[0095] Continue to see Figure 1 and Figure 3 , an embodiment of the track work platform may also include at least one brake block 81, any one of which is installed on any one of the frame 11, the base plate 12, the connecting rod 3 and the operating rod 5 by a quick release method. The brake block 81 can be quickly removed and laid on the track in front of and / or behind the running wheel 2, and the running wheel 2 is braked by the blocking effect of the brake block 81 on the running wheel 2. It is known to those skilled in the art that when the track is a horizontal track with basically no slope, the running wheel 2 that needs to be braked needs to be arranged one in front and one in the back to achieve; when the track is a climbing or descending track with a slope, only one brake block 81 is needed to block at a low place. One of the quick release methods of the brake block 81 is, as shown in the figure, the first connecting plate 82 is fixed to the side stop 13 by the first connecting member 83, and the brake block 81 is fixed to the connecting plate 82 by the second connecting member 84, and the first connecting member 83 and the second connecting member 84 can both use bolts, screws, etc.

[0096] Continue to see Figure 1 and Figure 3 In order to make the brake block 81 have a good braking effect, the brake block 81 is wedge-shaped and has a bottom surface 811 and an inclined surface 812. The bottom surface 811 can be placed on the top of the rail and fit with the top of the rail after being placed on the top of the rail. The inclined surface 812 forms an acute angle with the bottom surface 811 to press against the running wheel 2 from the front or back.

[0097] In addition, the brake block 81 is made of elastic material (such as rubber, plastic, etc.), and is squeezed and deformed by the running wheel 2, and can be stably pressed between the track and the running wheel 2 to avoid side slip.

[0098] Continue to see Figure 1 and Figure 3 , with a structure similar to that of a rail wheel, at least one running wheel 2 has a taper with a larger inner end and a smaller outer end, so as to adaptively meet the speed difference between the inner and outer wheels when turning. The inclined surface 812 fits with the tapered running wheel 2, further enhancing the blocking effect on the running wheel 2.

[0099] Continue to see Figures 1 to 6 In the push-pull position, the extension direction of the connecting rod 3 is perpendicular to the upper surface of the carrier 1. The connecting rod 3 is arranged perpendicular to the carrier 1, so that it will not invade the upper space of the carrier 1, and will invade the upper space outside the carrier 1 as little as possible, so that it is suitable for narrow spaces and the operation is more flexible. Of course, it is known to those skilled in the art that in the push-pull position, the extension direction of the connecting rod 3 can also form an obtuse angle with the upper surface of the carrier 1 to reduce the height of the operating rod 5.

[0100] One structure of the brake device is, see Figures 5 to 9 , which includes a friction pair component 41 and a brake cable 42. The brake cable 42 is configured such that when the friction pair component 41 is pulled toward the running wheel 2, the friction pair component 41 is coupled to brake at least one running wheel 2; when the friction pair component 41 is pulled away from the running wheel 2, the friction pair component 41 is fully or partially decoupled to not brake or partially brake all running wheels 2. The coupling, full decoupling or partial decoupling of the friction pair component 41 is controlled by the brake cable 42, which is suitable for long-distance force transmission, and has a simple structure, light weight and small size.

[0101] A specific structure of the friction pair assembly 41 is as follows: Figures 5 to 9 , which includes a second elastic member 413, a clutch member 414, and two relatively abuttable / separable first friction members 411 and second friction members 412. The abutment and separation are achieved by designing the parameters of the first elastic member 6, the second elastic member 413, and the first elastic member 6.

[0102] One of the first friction member 411 and the second friction member 412 is fixed to the running wheel 2, and the fixing of the second friction member 412 is used as an example for explanation. The second elastic member 413 provides a force for separating the first friction member 411 from the second friction member 412. The clutch member 414 is acted upon by the brake cable (the combined force of the first elastic member 6 and the user's force) and the second elastic member 413, and has a distal end 4141 and a proximal end 4142. The position of the first friction member 411 relative to the second friction member 412 is adjusted by the abutment of the distal end 4141 or the proximal end 4142 with the first friction member 411, thereby realizing the abutment / partial abutment / disengagement of the first friction member 411 from the second friction member 412, so as to provide full braking force, partial braking force and zero braking force respectively.

[0103] Continue to see Figures 5 to 9 , one implementation of the clutch member 414 is:

[0104] In the braking position (as mentioned above, in the initial position, the user does not apply any force), the force on the first friction member 411 is the combined force of the elastic restoring force of the first elastic member 6, the gravity of the operating rod 5 and the elastic restoring force of the second elastic member 413, and the elastic restoring force of the first elastic member 6>the gravity of the operating rod 5+the elastic restoring force of the second elastic member 413. At this time, the first friction member 411 abuts against the distal end 4141 to provide pressure to press the first friction member 411 against the second friction member 412, thereby providing complete braking force for the second friction member 412 (together with the running wheel 2 fixedly connected thereto);

[0105] In the unlocked position (such as Figures 7 to 9 As shown in the figure, the user applies a force (presses the operating rod 5 downward), and the force applied to the first friction member 411 is the combined force of the elastic restoring force of the first elastic member 6, the gravity of the operating rod 5, the elastic restoring force of the second elastic member 413, and the force applied by the user, and the elastic restoring force of the first elastic member 6 is less than the gravity of the operating rod 5 + the elastic restoring force of the second elastic member 413 + the force applied by the user. At this time, the first friction member 411 abuts against the proximal end 4142, so that the first friction member 411 is out of contact with the second friction member 412, and no braking force is provided;

[0106] Similar to the unlocking position, when the force applied by the user is not as great as that in the unlocking position, the operating lever 5 can move to any intermediate position between the braking position and the unlocking position, and the first friction member 411 abuts against an intermediate position between the distal end 4141 and the proximal end 4142. At this time, the first friction member 411 partially disengages from the second friction member 412, providing partial braking force.

[0107] In order to achieve the complete disengagement, partial disengagement and complete abutment of the first friction member 411 relative to the second friction member 412, the friction pair assembly 41 also includes an abutment shaft 415. The first friction members 411 are two arc-shaped members that are interlocked with each other. The first ends 4111 of the two first friction members are rotatably mounted on the abutment shaft 415 (via a semicircular groove 41111). The above-mentioned complete disengagement, partial disengagement and complete abutment are achieved by the different rotation angles of the two first friction members 411 around the abutment shaft 415. The clutch member 414 abuts against the second ends 4112 of the two first friction members. The second elastic member 413 is fixed between the two first friction members 411 to provide a pulling force for the two first friction members 411 to disengage from the second friction member 412.

[0108] When the distal end 4141 abuts against the second end 4112 of the first friction member in the hope of providing full braking force, the first friction member 411 abuts against the abutment shaft 415 through the semicircular groove 41111, and the semicircular grooves 41111 of the two first friction members 411 can partially break away from the abutment with the abutment shaft 415 and expand outward until they are blocked by the second friction member 412, so that the arcuate outer surface of the first friction member 411 and the arcuate inner surface of the second friction member 412 are completely abutted, and the complete abutment provides full braking force. As described above, the semicircular groove 41111 can only partially break away from the abutment with the abutment shaft 415, and the unbroken part has a limiting effect on the first friction member 411, preventing the semicircular groove 41111 from completely falling out of the abutment shaft 415, and at the same time, it also guides the resetting of the first friction member 411 (switching from providing full braking force to providing partial braking force or zero braking force).

[0109] Continue to see Figures 5 to 8 There are two second elastic members 413, one of which is arranged close to the abutment shaft 415 and the other is arranged close to the clutch member 414. The two second elastic members 413 provide pulling force from the first end 4111 of the first friction member and the second end 4112 of the first friction member, respectively, so that the outward expansion or inward movement of the first friction member 411 is more reliable. The extension direction of the second elastic member 413 is perpendicular to the rotation axis of the first friction member 411, so that the movement of the first friction member 411 is smoother.

[0110] Continue to see Figures 5 to 8Regarding the posture of the operating rod 5, the inventor can make a setting based on the above force relationship: in the braking position, the operating rod 5 is located at an oblique upper position; in the unlocking position, the operating rod 5 is basically horizontal. That is, in the braking position, the user does not need to apply force; when the brake needs to be partially or completely released, it is only necessary to apply a downward pressure to the operating rod 5 located at an oblique upper position. Obviously, the downward pressure can be achieved by the user's own weight, and the unlocking action is simple and labor-saving (with the help of the body weight of the arms, torso, etc.). At the same time, when the braking force is completely released (unlocking position), the operating rod 5 is limited to a horizontal state by the lower limit member 9, so that the user can accurately identify whether the braking force is completely released, which is also conducive to the application of thrust or pull.

[0111] Continue to see Figures 5 to 8 There are two connecting rods 3 and they are arranged at a distance from each other. The two ends of the operating rod 5 are respectively connected to the second ends 32 of the two connecting rods. Only a lightweight design can be adopted under the premise of satisfying the supporting function of the operating rod 5.

[0112] Continue to see Figure 1 and Figure 3 The operating rod 5 includes an operating section 51 in the middle and connecting sections 52 at both ends, and the connecting section 52 is connected to the second end 32 of the connecting rod; the operating section 51 has at least one straight extension portion 511 to facilitate the user's hand operation. The figure shows that the operating rod 5 is in a straight extension state as a whole.

[0113] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0114] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A track work platform, characterized in that: include: bearing member; A running wheel rotatably mounted on the bottom of the bearing member; A connecting rod having a first end and a second end, wherein the first end of the connecting rod is fixed to the bearing member so as to be maintained in a push-pull position, and the second end of the connecting rod can be extended to the vicinity of an operating position in the push-pull position; a braking device configured to brake at least one of the travel wheels; An operating rod is installed on the second end of the connecting rod so as to be switchable between a braking position and an unlocking position, and the operating rod acts on the braking device so that the braking device brakes at least one of the running wheels in the braking position and releases the brake on each of the running wheels in the unlocking position.

2. The track work platform according to claim 1, characterized in that: It also includes a first elastic member, which acts on the connecting rod and the operating rod respectively, and is used to keep the operating rod in the braking position through elastic restoring force in the absence of external force, and enable the operating rod to reach the unlocking position from the braking position when the elastic restoring force is overcome by external force.

3. The track work platform according to claim 1, characterized in that: The first end of the connecting rod is switchably mounted on the bearing member between the push-pull position and the storage position, wherein: In the storage position, the connecting rod is retracted into the supporting member.

4. The track work platform according to claim 3, characterized in that: The first end of the connecting rod is rotatably connected to the bearing member, and the connecting rod rotates relative to the bearing member to switch between the push-pull position and the storage position.

5. The track work platform according to claim 4, characterized in that: The first end of the connecting rod is rotatably mounted on the bearing member around a first axis, the first axis is lower than the upper surface of the bearing member, and the first end of the connecting rod forms an escape portion to eliminate the height difference between the first axis and the upper surface of the bearing member.

6. The track work platform according to claim 5, characterized in that: The bearing member is provided with an escape opening at a position corresponding to the connecting rod, so as to provide an escape space for the connecting rod to switch from the push-pull position to the storage position.

7. The track work platform according to claim 1, characterized in that: The carrier comprises: The frame is a hollow structure, and the travel wheels are fixed to the frame; The bottom plate is fixed to the upper surface of the frame and at least partially blocks the hollowing of the frame.

8. The track work platform according to claim 7, characterized in that: The bearing member further comprises a side stopper, which is arranged in a ring shape around the edges of the frame and the bottom plate, and the side stopper is higher than the frame and the bottom plate.

9. The track work platform according to claim 1, characterized in that: It also includes at least one brake block, any one of which is installed on any one of the carrier, the connecting rod and the operating rod by quick release, and the brake block is used to prevent the walking wheel from moving along the track by being installed on the track.

10. The track work platform according to claim 9, characterized in that: The brake pad is wedge-shaped and has: The bottom surface can be placed on the top of the rail; The inclined surface forms an acute angle with the bottom surface so as to support the traveling wheel from the front or the rear.

11. The track work platform according to claim 10, characterized in that: At least one of the running wheels has a taper with a larger inner end and a smaller outer end, and the inclined surface fits the running wheel with the taper.

12. The track work platform according to claim 9, characterized in that: The brake block is a block structure made of elastic material.

13. The track work platform according to claim 1, characterized in that: The brake device comprises a friction pair assembly and a brake cable, wherein the brake cable acts on the friction pair assembly, and the brake cable is configured as follows: When being pulled toward the travel wheel, the friction pair assembly is coupled to brake at least one of the travel wheels; When being pulled away from the travel wheels, the friction pair components are fully or partially decoupled to not brake or partially brake all the travel wheels.

14. The track work platform according to claim 13, characterized in that: The friction pair component comprises: a first friction member; A second friction member is fixed to the travel wheel; a second elastic member, providing a force for separating the first friction member from the second friction member; The clutch member is acted upon by the brake cable and the second elastic member and has a distal end and a proximal end, wherein: In the braking position, the first friction member abuts against the distal end to provide a pressure to press the first friction member against the second friction member; In the unlocked position, the first friction member abuts against the proximal end, so that the first friction member is out of contact with the second friction member.

15. The track work platform according to claim 14, characterized in that: The friction pair assembly further comprises an abutment shaft, wherein: The first friction members are two and are arc-shaped and buckled together. The first ends of the two first friction members are rotatably mounted on the abutment shaft, and the clutch member abuts between the second ends of the two first friction members. The second elastic member is fixed between the two first friction members, and provides a pulling force for the two first friction members to break away from contact with the second friction member.

16. The track work platform according to claim 15, characterized in that: There are two second elastic members, one of which is arranged close to the abutment shaft, and the other is arranged close to the clutch member.

17. The track work platform according to claim 16, characterized in that: An extending direction of the second elastic member is perpendicular to a rotation axis of the first friction member.

18. The track work platform according to claim 1, characterized in that: In the push-pull position, the extending direction of the connecting rod is perpendicular to the upper surface of the bearing member.

19. The track work platform according to claim 1, characterized in that: The operating rod is provided with a handle portion for an operator to push the track working platform to move along the rails.

20. The track work platform according to claim 1, characterized in that: In the braking position, the operating lever is located obliquely upward; In the unlocked position, the operating lever is substantially horizontal.

21. The track work platform according to claim 1, characterized in that: There are two connecting rods which are arranged at a distance from each other, and two ends of the operating rod are respectively connected to the second ends of the two connecting rods.

22. The track work platform according to claim 1, characterized in that: The operating rod comprises an operating section in the middle and connecting sections at both ends, wherein: The connecting section is connected to the second end of the connecting rod; The operating section has at least one straight extension.

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