Rail clamping and fixing device for gantry crane

Abstract

The utility model provides a kind of gantry crane track clamping fixing device, belong to hoisting machinery technical field, comprising: main frame and clamping adjusting mechanism, main frame includes two hinged guiding arms and two side frames, the upper end of two side frames is respectively hinged with the lower end of guiding arm, and the lower end of two side frames is provided with the track clamping groove for clamping track;Clamping adjusting mechanism includes the bidirectional screw rod with positive thread section and reverse thread section and fixed nut on bidirectional screw rod;Bidirectional screw rod is screwed on two side frames;Fixed nut is fixed on gantry crane body by second connecting member;Two side frames are respectively provided with the positive thread hole and reverse thread hole of adaptation positive thread section and reverse thread section;Positive or reverse rotation bidirectional screw rod, drive two side frames to be close to each other or away from each other, to make track clamping groove clamping track.The utility model realizes the simple and convenient of track clamping operation, without frequent adjustment by hand, greatly improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of lifting machinery technology, specifically relating to a gantry crane track clamping and fixing device. Background Technology

[0002] Gantry cranes are indispensable core lifting equipment in large construction sites such as highway bridges and beam prefabrication yards. The track clamping device of its trolley traveling mechanism undertakes the key safety functions of locking the crane position, preventing wind and accidental slippage, and is directly related to the stability of the equipment, the lifting accuracy and the safety of on-site personnel.

[0003] Currently, traditional gantry crane track clamping and fixing devices suffer from inconvenient adjustment and unreliable clamping. Utility Model Content

[0004] This utility model provides a gantry crane track clamping and fixing device, which aims to solve the problems of inconvenient adjustment and unreliable clamping in traditional gantry crane track clamping and fixing devices.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A gantry crane track clamping and fixing device is provided, comprising: a main frame and a clamping adjustment mechanism. The main frame includes two hinged guide arms and two side frames. The upper ends of the two side frames are respectively hinged to the lower ends of the guide arms, and the lower ends of the two side frames are provided with rail clamping grooves for clamping the track. The clamping adjustment mechanism includes a bidirectional screw with a forward threaded section and a reverse threaded section, and a fixing nut threaded onto the bidirectional screw. The bidirectional screw is screwed onto the two side frames. The fixing nut is fixed to the gantry crane body through a second connecting member. The two side frames are respectively provided with forward threaded holes and reverse threaded holes adapted to the forward threaded section and the reverse threaded section. Rotating the bidirectional screw in the forward or reverse direction causes the two side frames to move closer or further apart, so that the rail clamping grooves clamp the track.

[0006] In one possible implementation, a guide structure is connected between the two side frames. The guide structure includes a guide sleeve fixed to the inside of one side frame and a guide rod fixed to the inside of the other side frame. The guide rod is slidably fitted within the guide sleeve and retracts or extends as the two side frames move closer or further apart.

[0007] In one possible implementation, an anti-detachment structure is provided between the guide rod and the inner wall of the guide sleeve. The anti-detachment structure includes an anti-detachment disc disposed at the end of the guide rod and an anti-detachment shoulder disposed on the inner wall of the guide sleeve. When the anti-detachment disc abuts against the anti-detachment shoulder, the maximum stroke of the guide rod is limited.

[0008] In one possible implementation, the guide structure is provided at both the upper and lower positions of the bidirectional screw.

[0009] In one possible implementation, one end of the bidirectional screw is provided with a travel limiting structure, and the other end is provided with a rotating handle.

[0010] In one possible implementation, the travel limiting structure includes an anti-loosening nut and a locking screw screwed to one end of the bidirectional screw rod. The locking screw is radially screwed onto the anti-loosening nut along the diameter direction of the bidirectional screw rod and abuts against the bidirectional screw rod to lock the anti-loosening nut.

[0011] In one possible implementation, a locking structure is provided on the outer side of at least one of the side frames, the locking structure cooperating with the bidirectional screw to lock the bidirectional screw in a clamping state; the locking structure includes a gear on the bidirectional screw, a locking rod for locking the gear, and a spring fitted on the locking rod; a support seat is provided on the outer side of the side frame and above the bidirectional screw, the locking rod passes through the support seat, the locking rod has a limiting shoulder for limiting the spring, the spring is located between the lower surface of the support seat and the limiting shoulder, and the locking rod abuts against the gear by means of the spring; Rotating the bidirectional screw in both directions drives the gear to rotate, which in turn drives the spring to extend or retract via the locking rod, thus moving the side frame closer to or further away.

[0012] In one possible implementation, guide ramps are provided on opposite sides of the lower end of the locking rod.

[0013] In one possible implementation, the locking structure is provided on the outer side of each of the two side frames.

[0014] In one possible implementation, two hinged guide arms are also provided below the bidirectional screw.

[0015] The gantry crane track clamping and fixing device provided by this utility model has the following advantages compared with the prior art: The clamping adjustment mechanism includes a bidirectional screw with a forward threaded section and a reverse threaded section, and a fixing nut threaded onto the bidirectional screw; the bidirectional screw is screwed onto the two side frames; the fixing nut is fixed to the gantry crane body through a second connector; the two side frames are respectively provided with forward threaded holes and reverse threaded holes adapted to the forward threaded section and the reverse threaded section; rotating the bidirectional screw in the forward or reverse direction causes the two side frames to move closer or further apart, so that the rail clamping groove clamps the track, and at the same time causes the included angle between the two guide arms to decrease or increase, so that the main frame moves closer in the left and right direction while the total length in the up and down direction increases, and moves further apart in the left and right direction while the total length in the up and down direction decreases, thereby achieving the clamping and releasing of the track; during operation, only the bidirectional screw needs to be rotated in the forward or reverse direction to move the two side frames closer or further apart to achieve the clamping of the track, which is simple and convenient to operate, does not require frequent manual adjustment, and greatly improves work efficiency. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the gantry crane track clamping and fixing device provided in this embodiment of the utility model; Figure 2 for Figure 1 A side view of the gantry crane track clamping and fixing device provided in the embodiment; Explanation of reference numerals in the attached figures: 1. Guide arm; 2. Locking rod; 3. Support base; 4. Spring; 5. Limiting shoulder; 6. Gear; 7. Rotating handle; 8. Side frame; 9. Rail clamping groove; 10. Guide sleeve; 11. Guide rod; 12. Anti-loosening nut; 13. Locking screw; 14. Double-acting screw; 15. Fixing nut; 16. Guide slope. Detailed Implementation

[0017] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Please see Figure 1 and Figure 2The present invention provides a gantry crane track clamping and fixing device. The gantry crane track clamping and fixing device includes a main frame and a clamping adjustment mechanism. The main frame includes two hinged guide arms 1 and two side frames 8. The upper ends of the two side frames 8 are respectively hinged to the lower ends of the guide arms 1, and the lower ends of the two side frames 8 are provided with rail clamping grooves 9 for clamping the track. The clamping adjustment mechanism includes a bidirectional screw 14 with a forward threaded section and a reverse threaded section, and a fixing nut 15 threadedly connected to the bidirectional screw 14. The bidirectional screw 14 is screwed onto the two side frames 8. The fixing nut 15 is fixed to the gantry crane body through a second connecting member. The two side frames 8 are respectively provided with forward threaded holes and reverse threaded holes adapted to the forward and reverse threaded sections. Rotating the bidirectional screw 14 in the forward or reverse direction causes the two side frames 8 to move closer or further apart, so that the rail clamping grooves 9 clamp the track.

[0019] The gantry crane track clamping and fixing device provided by this utility model has the following advantages compared with the prior art: the clamping adjustment mechanism includes a bidirectional screw 14 with a forward threaded section and a reverse threaded section, and a fixing nut 15 threadedly connected to the bidirectional screw 14; the bidirectional screw 14 is screwed onto the two side frames 8; the fixing nut 15 is fixed to the gantry crane body through a second connecting member; the two side frames 8 are respectively provided with forward threaded holes and reverse threaded holes adapted to the forward threaded section and the reverse threaded section; rotating the bidirectional screw 14 in the forward or reverse direction drives the two... The side frames 8 move closer or further apart to clamp the rail in the rail clamping groove 9. At the same time, the angle between the two guide arms decreases or increases, so that the main frame moves closer in the left and right directions while its total length in the up and down directions increases, and moves further apart in the left and right directions while its total length in the up and down directions decreases. This achieves the clamping and releasing of the rail. During operation, only the bidirectional screw 14 needs to be rotated in the forward or reverse direction to move the two side frames 8 closer or further apart to clamp the rail. The operation is simple and convenient, and there is no need for frequent manual adjustments, which greatly improves work efficiency.

[0020] The guide arm 1 connects to two side frames 8, ensuring that the two side frames 8 are close to or far apart from each other in the same horizontal plane, so as to clamp the rail when it is necessary to fix the gantry crane or to leave the rail when it is not necessary to fix the gantry crane. When the distance between the two side frames 8 increases, the included angle between the two guide arms increases; when the distance between the two side frames 8 decreases, the included angle between the two guide arms decreases.

[0021] The installation of this device on the gantry crane requires the fixing nut 15 to be connected to the gantry crane body. A clamp can be installed on the fixing nut 15 to secure the gantry crane body. The rail clamping groove 9 at the lower end of the main frame clamps and fixes the rail to the bottom surface, thus achieving relative fixation between the gantry crane and the rail. This prevents inaccurate lifting positions caused by strong winds or accidental slippage of the gantry crane, and avoids the safety risk of the gantry crane being blown over or overturned in strong winds in the field.

[0022] In some embodiments, see Figure 1 and Figure 2 As shown, a guide structure connects the two side frames 8. The guide structure includes a guide sleeve 10 fixed to the inside of one side frame 8 and a guide rod 11 fixed to the inside of the other side frame 8. The guide rod 11 is slidably fitted inside the guide sleeve 10 and retracts or extends as the two side frames 8 move closer or further apart. When the distance between the two side frames 8 increases, the length of the guide rod 11 protruding outside the guide sleeve 10 increases; conversely, when the distance between the two side frames 8 decreases, the length of the guide rod 11 extending into the guide sleeve 10 increases, while the length protruding outside the guide sleeve 10 decreases.

[0023] The cooperation between the guide rod 11 and the guide sleeve 10 effectively ensures the stability and accuracy of the two side frames 8 during relative movement, preventing the side frames 8 from swaying or shifting during movement. Simultaneously, it also connects the two side frames 8, ensuring they move closer or further apart on the same horizontal plane, thereby guaranteeing reliable clamping of the rails by the two rail clamping grooves 9.

[0024] In some embodiments, see Figure 1 and Figure 2 As shown, an anti-detachment structure (not shown) is provided between the guide rod 11 and the inner wall of the guide sleeve 10. The anti-detachment structure includes an anti-detachment disc at the end of the guide rod 11 and an anti-detachment shoulder on the inner wall of the guide sleeve 10. When the anti-detachment disc abuts against the anti-detachment shoulder, it limits the maximum extension stroke of the guide rod 11. The anti-detachment structure effectively prevents the guide rod 11 from accidentally detaching from the guide sleeve 10 during operation, avoiding the risk of the guide rod 11 detaching.

[0025] In some embodiments, see Figure 1 As shown, guide structures are provided at the upper and lower positions of the bidirectional screw 14. This ensures stable and reliable adjustment of the side frame 8, thereby ensuring reliable clamping of the rail clamping groove 9 onto the rail.

[0026] In some embodiments, see Figure 1 As shown, one end of the bidirectional screw 14 is provided with a stroke limit structure, and the other end is provided with a rotating handle 7.

[0027] The travel limit structure can precisely limit the travel of the bidirectional screw 14, avoiding the risk of the side frame 8 disengaging from the bidirectional screw 14 due to excessive movement. In essence, it is also a limiter to prevent the side frame 8 from disengaging. The rotating handle 7 can improve the convenience and ease of operation. The rotating handle 7 is designed as an L-shaped rocker arm, which can save the operator effort.

[0028] In some embodiments, see Figure 1As shown, the travel limiting structure includes an anti-loosening nut 12 and a locking screw 13 screwed to one end of the bidirectional screw 14. The locking screw 13 is radially screwed onto the anti-loosening nut 12 along the diameter direction of the bidirectional screw 14 and abuts against the bidirectional screw 14 to lock the anti-loosening nut 12. This structure of the anti-loosening nut 12 and locking screw 13 is simple to install, easy to manufacture, and practical. It can prevent the side frame 8 from coming off one end of the bidirectional screw 14 and also facilitates the assembly of the bidirectional screw 14 and the side frame 8.

[0029] Optionally, two anti-loosening nuts 12 can be installed back-to-back on the bidirectional screw 14 to limit the movement of the side frame 8, thereby improving the safety and reliability of the device.

[0030] In some embodiments, see Figure 1 and Figure 2 As shown, a locking structure is provided on the outer side of at least one side frame 8. The locking structure cooperates with the bidirectional screw 14 to lock the bidirectional screw 14 when it is adjusted to the clamping state. The locking structure is mounted on the gear 6, the locking rod 2 of the locking gear 6, and the spring 4 fitted on the locking rod 2. A support seat 3 is provided on the outer side of the side frame 8 and above the bidirectional screw 14. The locking rod 2 passes through the support seat 3. A limiting shoulder 5 for the limiting spring 4 is provided on the locking rod 2. The spring 4 is located between the lower surface of the support seat 3 and the limiting shoulder 5. The locking rod 2 abuts against the gear 6 with the help of the spring 4. Rotating the bidirectional screw 14 in both directions drives the gear 6 to rotate and drives the spring 4 to extend and retract through the locking rod 2, so as to move the side frame 8 closer or further away.

[0031] For example, rotating the bidirectional screw 14 clockwise or forward will drive the gear 6 to rotate clockwise synchronously. Since the teeth of the gear 6 have inclined surfaces, the lower end of the locking rod 2 is always pressed against the contour surface of the gear 6 under the elastic force of the spring 4. As the inclined surface of the rising teeth is pressed against the gear 6, the locking rod 2 compresses the spring 4 and moves upward. When it encounters the inclined surface of the descending teeth, it moves downward under the elastic force of the spring 4. When the clamping groove 9 clamps the track, the bidirectional screw 14 stops rotating. At this time, the locking rod 2 no longer moves, but is pressed against the contour surface of the gear 6, which can lock the gear 6 and thus lock the bidirectional screw 14.

[0032] When the bidirectional screw 14 is rotated in the reverse or counterclockwise direction, the operation principle is the same as when it is rotated in the forward direction.

[0033] In some embodiments, see Figure 2 As shown, guide ramps 16 are provided on opposite sides of the lower end of the locking rod 2. This facilitates the force applied by the gear 6 to the locking rod 2 and the mutual contact between the two, thereby improving the smoothness of rotating the bidirectional screw 14 while locking the stopped bidirectional screw 14.

[0034] In some embodiments, see Figure 1 and Figure 2 As shown, the locking structure is provided on the outer side of the two side frames 8 respectively (only one side is shown in the figure), which improves the reliability of locking the bidirectional screw 14 and thus ensures the reliability of clamping the rail.

[0035] In some embodiments, see Figure 1 As shown, two hinged guide arms are also provided below the bidirectional screw 14. This design also facilitates the stability of the side frame 8's movement, thereby ensuring the reliability of the rail clamping groove 9 clamping the rail.

[0036] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gantry crane track clamping and fixing device, characterized in that, include: The main frame includes two hinged guide arms (1) and two side frames (8). The upper ends of the two side frames (8) are respectively hinged to the lower ends of the guide arms (1), and the lower ends of the two side frames (8) are provided with rail clamping grooves (9) for clamping the rail; and The clamping adjustment mechanism includes a bidirectional screw (14) having a forward threaded section and a reverse threaded section, and a fixing nut (15) threaded onto the bidirectional screw (14); the bidirectional screw (14) is screwed onto two side frames (8); the fixing nut (15) is fixed to the gantry crane body by a second connector; the two side frames (8) are respectively provided with forward threaded holes and reverse threaded holes adapted to the forward threaded section and the reverse threaded section; Rotating the bidirectional screw (14) in the forward or reverse direction causes the two side frames (8) to move closer or further apart, so that the rail clamping groove (9) clamps the rail.

2. The gantry crane track clamping and fixing device as described in claim 1, characterized in that, A guide structure is connected between the two side frames (8). The guide structure includes a guide sleeve (10) fixed inside one side frame (8) and a guide rod (11) fixed inside the other side frame (8). The guide rod (11) is slidably fitted inside the guide sleeve (10) and retracts or extends as the two side frames (8) move closer or further apart.

3. The gantry crane track clamping and fixing device as described in claim 2, characterized in that, An anti-detachment structure is provided between the guide rod (11) and the inner wall of the guide sleeve (10). The anti-detachment structure includes an anti-detachment disc provided at the end of the guide rod (11) and an anti-detachment shoulder provided on the inner wall of the guide sleeve (10). When the anti-detachment disc abuts against the anti-detachment shoulder, the maximum stroke of the guide rod (11) is limited.

4. The gantry crane track clamping and fixing device as described in claim 3, characterized in that, The bidirectional screw (14) is provided with the guide structure at its upper and lower positions respectively.

5. The gantry crane track clamping and fixing device as described in claim 1, characterized in that, One end of the bidirectional screw (14) is provided with a stroke limiting structure, and the other end is provided with a rotating handle (7).

6. The gantry crane track clamping and fixing device as described in claim 5, characterized in that, The travel limiting structure includes an anti-loosening nut (12) and a locking screw (13) screwed to one end of the bidirectional screw (14). The locking screw (13) is radially screwed to the anti-loosening nut (12) along the diameter direction of the bidirectional screw (14) and abuts against the bidirectional screw (14) to lock the anti-loosening nut (12).

7. The gantry crane track clamping and fixing device as described in claim 1, characterized in that, A locking structure is provided on the outside of at least one of the side frames (8), the locking structure cooperating with the bidirectional screw (14) to lock the bidirectional screw (14) when it is adjusted to the clamping state; the locking structure is mounted on the gear (6) on the bidirectional screw (14), a locking rod (2) locking the gear (6) and a spring (4) fitted on the locking rod (2); a support seat (3) is provided on the outside of the side frame (8) and above the bidirectional screw (14), the locking rod (2) passes through the support seat (3), a limiting shoulder (5) is provided on the locking rod (2) to limit the spring (4), the spring (4) is located between the lower surface of the support seat (3) and the limiting shoulder (5), and the locking rod (2) abuts against the gear (6) by means of the spring (4); Rotating the bidirectional screw (14) in both directions causes the gear (6) to rotate and, through the locking rod (2), causes the spring (4) to extend or retract, thereby moving the side frame (8) closer to or further away from the side frame.

8. The gantry crane track clamping and fixing device as described in claim 7, characterized in that, The lower end of the locking rod (2) is provided with guide slopes (16) on both opposite sides.

9. The gantry crane track clamping and fixing device as described in claim 7, characterized in that, The locking structure is provided on the outer side of each of the two side frames (8).

10. The gantry crane track clamping and fixing device as described in claim 1, characterized in that, Two hinged guide arms (1) are also provided below the bidirectional screw (14).

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