Adjustable safe walking pedal of shield tunneling machine

Abstract

The utility model relates to an adjustable shield tunneling machine safe walking pedal which comprises a telescopic pedal assembly fixed to a trailer bottom supporting structure through a supporting column. The telescopic pedal assembly comprises a fixed pedal assembly, a movable pedal assembly, a telescopic mechanism used for driving the movable pedal assembly to move relative to the fixed pedal assembly, and a guide mechanism used for guiding movement of the movable pedal assembly. The guide mechanism is arranged in the fixed pedal assembly and matched with the fixed pedal assembly to form a movable pedal assembly supporting structure. The movable pedal assembly is of a movable structure and can move relative to the fixed pedal assembly, the width of the movable pedal assembly is not changed, the overall width of the walking pedal is formed after the movable pedal assembly and the fixed pedal assembly are combined, and the overall width of the walking pedal is changed after the movable pedal assembly moves relative to the fixed pedal assembly. Therefore, the tunnel size change requirement is met.

Description

Technical Field

[0001] The utility model belongs to the field of shield machines, and particularly relates to an adjustable safety walking pedal for a shield machine. Background Technique

[0002] The size of the tunnel is designed by designers according to needs. Once the tunnel size is determined, a corresponding shield machine is required for tunneling construction. The shield machine includes a shield head and a trailer. The size of the tunnel depends on the size of the shield head of the shield machine, and the size of the trailer does not affect the construction size. Therefore, when selecting a shield machine, the appropriate shield head is mainly selected according to the size of the tunnel.

[0003] Existing shield machines are all equipped with multiple trailers for a shield head. The trailer includes a main structure and walking pedals on both sides. The walking pedals are mainly convenient for construction workers to walk and are also platforms for standing during segment construction on the inner wall of the passage. The walking pedals are related to the passability and the quality and safety of segment construction on the inner wall of the passage. The main structures of trailers required for different sizes are basically the same, and the size of the main structure does not affect construction. The maximum width between the edges of the walking pedals is a factor to be considered when selecting a trailer. The prior art mostly selects the corresponding trailer according to the internal size of the passage, so that the maximum width of the trailer meets the construction requirements. However, at present, trailers with different widths are not interchangeable. Different-sized shield heads are equipped with corresponding-sized trailers. For example, a 6m shield head is equipped with a trailer suitable for a 6m width, and a 7m shield head is equipped with a trailer suitable for a 7m width. Each time the shield head is replaced, the trailer needs to be replaced at the same time. This results in a large variety of trailers and a large number of trailers, which requires more space for storage usually, increases the use cost and the storage cost, and also brings inconvenience to transportation. Summary of the Invention

[0004] The utility model provides an adjustable safety walking pedal for a shield machine, which adopts a walking pedal with adjustable width to match the existing trailers, so as to meet the construction requirements of tunnels with different inner diameters.

[0005] The specific technical solution of the utility model is as follows: An adjustable safety walking pedal for a shield machine includes a telescopic pedal assembly fixed on the bottom support structure of the trailer through support columns. The telescopic pedal assembly includes a fixed pedal assembly, a movable pedal assembly, a telescopic mechanism for driving the movable pedal assembly to move relative to the fixed pedal assembly, and a guiding mechanism for guiding the movement of the movable pedal assembly. The guiding mechanism is arranged in the fixed pedal assembly and cooperates with the fixed pedal assembly to form a support structure for the movable pedal assembly.

[0006] The telescopic pedal assembly indicates that it can be telescoped to achieve the width dimension of the pedal shape. The telescoping is realized by moving the movable pedal assembly relative to the fixed pedal assembly. The fixed pedal assembly belongs to a fixed structure and does not move, so its width remains unchanged. The movable pedal assembly belongs to a movable structure and can move relative to the fixed pedal assembly, and its own width remains unchanged. After the movable pedal assembly and the fixed pedal assembly are combined, the overall width of the walking pedal is formed. When the movable pedal assembly moves relative to the fixed pedal assembly, the overall width of the walking pedal changes, so as to adapt to the change of the tunnel size. The movement of the movable pedal assembly relative to the fixed pedal assembly is realized by a telescopic mechanism. The telescopic mechanism can adopt a manual mechanism, or an electric, pneumatic or hydraulic mechanism. The telescopic mechanism drives the movable pedal assembly to translate relative to the fixed pedal assembly during telescoping. To ensure the stability of the translation of the movable pedal assembly, a guiding mechanism is also included. The guiding mechanism guides the translation of the movable pedal assembly, so that the translation of the movable pedal assembly remains straight, avoiding damage to the telescopic mechanism, and also avoiding phenomena such as jamming caused by the deviation of the movable pedal assembly during movement. The guiding mechanism also makes the translation of the movable pedal assembly smoother. After the movable pedal assembly moves outward relative to the fixed pedal assembly, the center of gravity of the movable pedal assembly gradually deviates outward. The guiding mechanism can play a supporting role after the movable pedal assembly moves outward, so as to ensure the stability of the movable pedal assembly after moving outward.

[0007] Further preferably, the fixed pedal assembly includes a fixed pedal and a lower support frame fixed to the fixed pedal. The lower support frame is in a frame structure, and the telescopic mechanism is arranged inside the lower support frame.

[0008] For the convenience of passage, the walking pedal generally needs to be kept flat. The lower support frame is fixed to the lower surface of the fixed pedal, and the fixed pedal is supported by the lower support frame. In this way, the fixed pedal can be made of relatively thin steel plates and other materials. After being supported by the lower support frame, the fixed pedal is prevented from deforming. At the same time, the lower support frame also provides a space for installing the telescopic mechanism, so that the telescopic mechanism is installed below the fixed pedal.

[0009] Further preferably, the lower support frame includes lower support frame cross edges and lower support frame longitudinal edges that enclose a rectangle, and lower support frame inner cross beams and lower support frame inner longitudinal beams that are vertically staggered inside the rectangle. Among them, a concave groove is provided on the upper part of the front lower support frame longitudinal edge at the front side, and a concave groove is provided on the lower support frame inner longitudinal beam in the longitudinal direction inside the rectangle. The groove on the lower support frame inner longitudinal beam corresponds to the groove on the front lower support frame longitudinal edge.

[0010] The guiding mechanism of the movable pedal assembly includes a groove block. The groove block is arranged on the fixed pedal assembly. For the convenience of installation, a groove is provided on the lower support frame, and the groove cooperates with the groove block. After the movable pedal assembly moves outward relative to the fixed pedal assembly.

[0011] Further preferably, the movable pedal assembly includes a movable pedal and an upper support frame fixed to the movable pedal. The upper support frame is in a frame structure and includes a front beam of the upper support frame, a horizontal side of the upper support frame, a longitudinal side of the upper support frame, and inner beams of the upper support frame arranged in a crisscross pattern within the rectangle, which enclose a rectangle.

[0012] Since the movable pedal assembly is a movable part, in order to reduce the weight of the movable pedal assembly, while providing sufficient supporting force, the thickness of the upper support frame is reduced, which facilitates installation and transportation and also reduces the power required for the translation of the movable pedal assembly.

[0013] Further preferably, the outer side of the longitudinal side of the upper support frame is an inclined surface. The outer side is set as an inclined surface, so that there is an inclined surface transition between the edge of the movable pedal assembly and the surface of the fixed pedal assembly, and no obvious step shape will be formed, ensuring practical safety.

[0014] Further preferably, the guiding mechanism includes a guiding rod, a guiding sleeve, a guiding block, and a groove block. The guiding rod is fixed to the movable pedal assembly, the guiding sleeve is fixed to the fixed pedal assembly, the guiding rod is matched with the guiding sleeve, the guiding block is fixed below the movable pedal assembly, the groove block is fixed to the fixed pedal assembly, and the guiding block is matched with the groove block; a slot is provided on the fixed pedal assembly, and the direction of the slot corresponds to the moving direction of the movable pedal assembly, and the slot of the slot is corresponding to the notch of the groove block.

[0015] The guiding block passes through the slot and is matched with the groove block. One is to guide the translation of the movable pedal assembly, and at the same time, it can also limit the inclination of the movable pedal assembly to prevent the movable pedal assembly from tipping over after moving outwards, so that the movable pedal assembly has sufficient supporting ability and ensures practical safety; the guiding rod passes through the guiding sleeve and is coaxially matched, and the guiding rod can axially move within the guiding sleeve.

[0016] Further preferably, the guiding rod is in a round rod shape, the end of the guiding rod extends into the lower support frame, and a connecting part connected to the telescopic mechanism is provided at the end of the guiding rod; the cross section of the guiding block is in an inverted T shape, and a guiding groove adapted to the shape of the guiding block is provided in the groove block.

[0017] Further preferably, the telescopic mechanism adopts a telescopic cylinder, the telescopic cylinder is arranged in the fixed pedal assembly, and the end of the telescopic rod of the telescopic cylinder is connected to the end of the guiding rod of the guiding mechanism. Using a telescopic cylinder facilitates the translation of the movable pedal assembly, and the translation is fast, the action is completed quickly, and the waiting time is reduced.

[0018] Further preferably, the support column is vertically fixed to the fixed pedal assembly, a triangular support inclined plate is fixed to the side of the support column, and the upper side of the support inclined plate is connected and fixed to the fixed pedal assembly for support; a sticker is connected to the outer edge of the movable pedal assembly, and the sticker is inclined relative to the movable pedal assembly, and the inclined direction is upward.

[0019] Further preferably, the telescopic mechanism adopts a lead screw mechanism, including a rotating lead screw and a slider cooperating with the rotating lead screw. The slider is fixed to the moving pedal assembly, and the rotating lead screw is driven by a motor or manually.

[0020] The beneficial effects of the present utility model are as follows: 1. The moving pedal assembly is a mobile structure and can move relative to the fixed pedal assembly while its own width remains unchanged. After the moving pedal assembly and the fixed pedal assembly are combined, the overall width of the walking pedal is formed. After the moving pedal assembly moves relative to the fixed pedal assembly, the overall width of the walking pedal changes, so as to meet the need of tunnel size change;

[0021] 2. The movement of the moving pedal assembly relative to the fixed pedal assembly is realized by the telescopic mechanism. The telescopic mechanism can adopt a manual mechanism, which belongs to a pure mechanical structure and does not require other power, reducing the layout of power pipelines; or an electric, pneumatic or hydraulic mechanism can be adopted to reduce the operation intensity of workers and is convenient for quick adjustment at the same time;

[0022] 3. The translation of the moving pedal assembly is guided by the guiding mechanism, so that the translation of the moving pedal assembly remains straight, avoiding damage to the telescopic mechanism and also avoiding phenomena such as jamming caused by the deviation of the moving pedal assembly during movement. The guiding mechanism also makes the translation of the moving pedal assembly smoother;

[0023] 4. After the moving pedal assembly moves outward relative to the fixed pedal assembly, the center of gravity of the moving pedal assembly gradually deviates outward. The guiding mechanism can play a supporting role after the moving pedal assembly moves outward, thus ensuring the stability of the moving pedal assembly after moving outward. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 is an exploded schematic diagram of the present utility model;

[0026] Figure 3 is a schematic diagram of width adjustment of the present utility model;

[0027] Figure 4 is a schematic diagram of use in a tunnel of the present utility model;

[0028] Figure 5 is a schematic diagram of a manual adjustment structure of the present utility model;

[0029] In the figure: 1. mounting plate, 2. movable pedal, 3. upper support frame, 4. fixed pedal, 5. telescopic cylinder, 6. lower support frame, 7. support column, 8. bottom support structure, 9. support inclined plate, 10. guide rod, 11. guide sleeve, 12. horizontal side of upper support frame, 13. inner beam of upper support frame, 14. longitudinal side of upper support frame, 15. guide block, 16. inclined surface, 17. connecting component, 18. front beam of upper support frame, 19. slot, 20. slot block, 21. guide groove, 22. horizontal side of lower support frame, 23. front longitudinal side of lower support frame, 24. convex part, 25. groove, 26. inner longitudinal beam of lower support frame, 27. trailer, 28. tunnel, 29. slider, 30. rotating lead screw. Detailed implementation manner

[0030] The present utility model will be further described below through specific embodiments in conjunction with the accompanying drawings. Embodiment

[0031] As Figure 1 Figure 2 shown, an adjustable safety walking pedal for a shield machine includes a telescopic pedal assembly fixed to the bottom support structure 8 of the trailer 27 through the support column 7. The telescopic pedal assembly includes a fixed pedal assembly, a movable pedal assembly arranged in parallel up and down, a telescopic mechanism for driving the movable pedal assembly to move relative to the fixed pedal assembly, and a guiding mechanism for guiding the movement of the movable pedal assembly. The fixed pedal assembly is located below the movable pedal assembly, and the guiding mechanism is arranged in the fixed pedal assembly and cooperates with the fixed pedal assembly to form a support structure for the movable pedal assembly. In this embodiment, the length of the fixed pedal assembly is 10 meters, the length of the movable pedal assembly is 10 meters, there are 5 support columns, and one support column is arranged every 2.5 meters.

[0032] The support column is of square tube structure. The lower end of the support column is perpendicularly fixed to the bottom support structure of the trailer 27, and the upper end of the support column is perpendicularly fixed to the fixed pedal assembly. The lengths of the support columns are not equal. Among the 5 support columns, the lengths of 3 support columns are equal and longer than the other 2 support columns. The short support columns are located between the long support columns. A triangular support inclined plate 9 is fixed to the side surface of the short support column, and the upper side edge of the support inclined plate is connected and fixed to the fixed pedal assembly for support.

[0033] The fixed pedal assembly includes a fixed pedal 4 and a lower support frame 6 fixed to the fixed pedal. The lower support frame includes a lower support frame horizontal side 22 and a lower support frame vertical side that are enclosed in a rectangle, and a lower support frame inner cross beam and a lower support frame inner longitudinal beam 26 that are arranged vertically and staggered inside the rectangle. A concave groove 25 is arranged on the upper part of the front longitudinal side 23 of the lower support frame on the front side, and a concave groove 25 is arranged on the lower support frame inner longitudinal beam 26 in the longitudinal direction of the rectangle. The grooves on the lower support frame inner longitudinal beam correspond to the grooves on the front longitudinal side of the lower support frame, and no grooves are arranged on the upper surface of the rear longitudinal side of the lower support frame. There are three grooves on the front longitudinal side of the lower support frame, and there are three grooves on the lower support frame inner longitudinal beam. A rectangular convex portion 24 is arranged on the lower part of the lower support frame longitudinal side, and the position of the convex portion is between the grooves. A transverse circular hole is arranged on the convex position on the front longitudinal side of the lower support frame, and a guide sleeve 11 is fixed in the circular hole. The thickness of the inner cross beam of the lower support frame and the inner longitudinal beam of the lower support frame is smaller than the thickness of the cross side and the longitudinal side of the lower support frame. A slot block 20 is inserted into the groove of the lower support frame. The slot block is a rectangular parallelepiped structure. A guide groove 21 is arranged in the slot block. The upper surface of the slot block is open, and the opening and the guide groove are in an inverted T shape. The slot block is placed on the front longitudinal side of the lower support frame and the inner longitudinal beam of the lower support frame. The fixed pedal is planar, and the fixed pedal is fixed on the lower support frame. A slit 19 is arranged on the fixed pedal. The width of the slit is equal to the width of the opening of the slot block, and the length of the slit is equal to the length of the slot block. The slit extends from one side of the fixed pedal to the inside of the fixed pedal, and the length of the slit is less than the width of the fixed pedal. In this embodiment, the length of the slit is 3 / 5 of the width of the fixed pedal.

[0034] The movable pedal assembly includes a movable pedal 2 and an upper support frame 3 fixed to the movable pedal. The upper support frame is a frame structure, and includes an upper support frame front beam 18, an upper support frame horizontal side 12, an upper support frame vertical side 14, and an upper support frame inner beam 13 arranged in a crisscross pattern in the rectangle. The upper support frame front beam has the largest thickness, and the upper support frame front beam covers the outer side surface of the fixed pedal assembly ( Figure 1 The left side of the upper support frame is shown in FIG. 1 ), and the thickness of the rest of the upper support frame is small, and the outer side of the longitudinal side of the upper support frame is an inclined surface 16. Except for the front beam of the upper support frame, the rest of the parts can be made of angle steel. A guide block 15 is fixed on the lower surface of the upper support frame. The guide block is in an inverted T shape, and the inverted T shape of the guide block is adapted to the inverted T-shaped guide groove in the groove block. There are three guide blocks, and the positions of the three guide blocks correspond to the positions of the groove block.

[0035] A sticking plate 1 is fixed on the outer side surface of the moving pedal assembly, and the sticking plate is inclined relative to the moving pedal assembly, and the inclination direction is upward.

[0036] The telescopic mechanism uses a telescopic cylinder 5. The telescopic cylinder is arranged inside the fixed pedal assembly. The tail end of the cylinder body of the telescopic cylinder is hinged to the support. The support is fixed at the position corresponding to the convex part on the rear longitudinal edge of the lower support frame. The telescopic rod of the telescopic cylinder faces the convex part on the front longitudinal edge of the lower support frame. The axis of the telescopic cylinder is coaxial with the axis of the guide sleeve. The telescopic cylinder is connected to the air source of the trailer, and the control device of the telescopic cylinder is arranged at the trailer. The telescopic distance of the telescopic cylinder is set according to needs.

[0037] The guiding mechanism includes a guiding rod 10, a guide sleeve 11, a guide block 15 and a groove block 20. The guiding rod is fixed on the front beam of the upper support frame. The guide sleeve is arranged in the round hole on the front longitudinal edge of the lower support frame. The guiding rod is matched with the guide sleeve. The guiding rod is in a round rod shape. The end of the guiding rod extends into the lower support frame, and a connecting component 17 connected to the telescopic mechanism is arranged at the end of the guiding rod. The end of the telescopic rod of the telescopic cylinder is hinged to the connecting component at the end of the guiding rod.

[0038] As Figure 3 Figure 4 shown, under the action of the telescopic cylinder, the telescopic cylinder pushes the guiding rod to extend outwards, and the movable pedal assembly translates outwards relative to the fixed pedal assembly ( Figure 3 the left direction in the figure), the guide block moves in the slot and the groove block. After moving in place, the attaching plate fits with the inner wall of the tunnel 28, and the guide block, the guiding rod and the guide sleeve cooperate to support the movable pedal assembly. For example: for a 6-meter shield head and an 8-meter shield head, when choosing an 8-meter shield head, still choose a trailer 7 adapted to 6 meters. At the same time, through the telescopic pedal assembly, the movable pedal assembly translates outwards so that there is no gap between the outer side of the walking pedal and the inner wall of the new tunnel. Embodiment

[0039] As Figure 5 shown, for an adjustable safety walking pedal of a shield machine, different from Embodiment 1: the telescopic mechanism uses a lead screw mechanism, including a rotating lead screw 30 and a slider 29 matched with the rotating lead screw. The slider is fixed below the upper support frame. The two ends of the rotating lead screw are arranged in the lower support frame through bearings and bearing seats. The right end ( Figure 5 the right direction in the figure) of the rotating lead screw is connected with a motor (not shown in the figure), and the control of the motor is in the trailer. When the motor rotates, it drives the rotating lead screw to rotate. When the rotating lead screw rotates, the slider drives the movable pedal assembly to move along the axis direction of the rotating lead screw. The guiding rod, the guide block and the groove block form a guiding mechanism and support the movable pedal assembly. The rest of the structure refers to Embodiment 1.

[0040] The above is only the preferred embodiment of the present invention, and does not impose any limitation on the present invention. Any simple modification, change and equivalent transformation made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An adjustable shield machine safety walking pedal, characterized in that: The invention comprises a telescopic pedal assembly fixed to a bottom support structure of a trailer via a support column (7), the telescopic pedal assembly comprising a fixed pedal assembly, a movable pedal assembly, a telescopic mechanism for driving the movable pedal assembly to move relative to the fixed pedal assembly, and a guiding mechanism for guiding the movement of the movable pedal assembly, wherein the guiding mechanism is arranged in the fixed pedal assembly and cooperates with the fixed pedal assembly to form a movable pedal assembly support structure.

2. The adjustable shield machine safety walking pedal according to claim 1, characterized in that: The fixed pedal assembly comprises a fixed pedal (4) and a lower support frame (6) fixed to the fixed pedal; the lower support frame is a frame-type structure, and the telescopic mechanism is arranged in the lower support frame.

3. The adjustable shield machine safety walking pedal according to claim 2, characterized in that: The lower support frame comprises a lower support frame transverse side (22) and a lower support frame longitudinal side which form a rectangle, and a lower support frame inner transverse beam and a lower support frame inner longitudinal beam which are arranged inside the rectangle and are vertically staggered; wherein a concave groove (25) is arranged at the upper part of the front longitudinal side (23) of the lower support frame on the front side, and a concave groove is arranged on the longitudinal inner longitudinal beam of the lower support frame in the longitudinal direction within the rectangle, and the groove on the lower support frame inner longitudinal beam corresponds to the groove on the front longitudinal side of the lower support frame.

4. The adjustable shield machine safety walking pedal according to claim 1, characterized in that: The movable pedal assembly comprises a movable pedal (2) and an upper support frame (3) fixed to the movable pedal. The upper support frame is a frame-type structure, comprising an upper support frame front beam (18) forming a rectangle, an upper support frame transverse side (12), an upper support frame longitudinal side, and an upper support frame inner beam arranged in a crisscross pattern in the rectangle.

5. The adjustable shield machine safety walking pedal according to claim 4, characterized in that: The outer side of the longitudinal side of the upper support frame is a slope (16).

6. An adjustable shield machine safety walking pedal according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The guide mechanism comprises a guide rod (10), a guide sleeve (11), a guide block (15) and a slot block (20), wherein the guide rod is fixed on the movable pedal assembly, the guide sleeve is fixed on the fixed pedal assembly, the guide rod cooperates with the guide sleeve, the guide block is fixed below the movable pedal assembly, the slot block is fixed on the fixed pedal assembly, and the guide block cooperates with the slot block; a slit (19) is provided on the fixed pedal assembly, the direction of the slit corresponds to the moving direction of the movable pedal assembly, and the slit corresponds to a notch of the slot block.

7. The adjustable shield machine safety walking pedal according to claim 6, characterized in that: The guide rod is in the shape of a round rod, the end of which extends into the lower support frame, and a connecting component connected to the telescopic mechanism is provided at the end of the guide rod; the cross section of the guide block is in an inverted T shape, and the groove block has a guide groove that matches the shape of the guide block.

8. The adjustable shield machine safety walking pedal according to claim 1, characterized in that: The telescopic mechanism adopts a telescopic cylinder (5), which is arranged in the fixed pedal assembly, and the end of the telescopic rod of the telescopic cylinder is connected to the end of the guide rod of the guide mechanism.

9. The adjustable shield machine safety walking pedal according to claim 1, characterized in that: The support column vertically fixes the fixed pedal assembly, and a triangular support inclined plate (9) is fixed on the side of the support column, and the upper side of the support inclined plate is connected to the fixed pedal assembly for fixed support; the outer edge of the movable pedal assembly is connected to a sticking plate, and the sticking plate is inclined relative to the movable pedal assembly, and the inclination direction is upward.

10. An adjustable shield machine safety walking pedal according to claim 1 or 2 or 3 or 4, characterized in that: The telescopic mechanism adopts a screw mechanism (30), comprising a rotating screw and a slider matched with the rotating screw, the slider is fixed to the moving pedal assembly, and the rotating screw is driven by a motor or manually.

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