Automatic rail clamping device of crane

Abstract

The utility model provides an automatic rail clamping device of a crane, which comprises a support arranged at the lower end of a rack of the crane; two first clamping blocks and two second clamping blocks are installed on the support and symmetrically distributed on the two sides of the head of the track. A push-pull type electromagnet is further installed on the support, and a spring is installed at the outer end of a push rod of the push-pull type electromagnet. When the push-pull type electromagnet is electrified, the electromagnet is electrified to drive the push rod to move towards one side, and the first clamping block and the second clamping block are driven to move back to back to be away from the track. And when the push-pull electromagnet is powered off, the spring is reset to drive the push rod to move reversely and drive the first clamping block and the second clamping block to move oppositely to clamp the rail. The push-pull type electromagnet drives the first clamping block and the second clamping block to clamp the track in a power-off mode, so that the track is not affected by strong wind or earthquakes, and braking and parking can be stably carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of crane brakes, in particular to an automatic rail clamp for a crane. Background Art

[0002] It is generally necessary to install a rail clamp on the crane, which not only acts as a brake, but also is used to improve its position stability when parking, to prevent movement due to misoperation or accident, which may cause safety accidents.

[0003] The rail clamp is generally provided with a clamping head for clamping the rail, and the clamping head is driven by a driving component. When the driving component is powered on, it drives the clamping head to clamp or loosen the rail.

[0004] If the crane is used outdoors, when strong winds or earthquakes occur, power outages are likely to occur. In this case, the track clamp will lose its function and the crane will continue to move due to inertia, causing safety accidents. Utility Model Content

[0005] In order to solve the technical problems in the background technology, the utility model discloses an automatic rail clamp for a crane.

[0006] The utility model provides an automatic rail clamp for a crane, comprising a support, which is installed at the lower end of a crane frame;

[0007] Two first clamping blocks and two second clamping blocks are installed on the support, and the first clamping blocks and the second clamping blocks are symmetrically distributed on both sides of the rail head;

[0008] A push-pull electromagnet is also installed on the support, and a spring is installed at the outer end of the push rod;

[0009] When the push-pull electromagnet is energized, the electromagnet is energized, driving the push rod to move to one side, driving the first clamping block and the second clamping block to move back and away from the track;

[0010] When the push-pull electromagnet is powered off, the spring is reset, driving the push rod to move in the opposite direction, and driving the first clamping block and the second clamping block to move toward each other to clamp the track.

[0011] The beneficial effects of the utility model are: 1. The push-pull electromagnet drives the first clamping block and the second clamping block to clamp the rail by powering off, so it will not be affected by strong winds or earthquakes, and can brake and stop stably; 2. The first clamping block and the second clamping block are both set in two, the contact area with the rail is larger, the friction force is also greater, and the braking effect is better.

[0012] The first clamping block and the second clamping block generally clamp or loosen the track through linear movement. In order to improve the stability of its linear movement, it is generally necessary to install a guiding device, which not only leads to increased costs, but also makes the utility model occupy a larger space. Based on this, a further improvement is that the first clamping block and the second clamping block are both hinged to the support through the first connecting shaft and rotate in the horizontal direction.

[0013] The specific structure of the first clamping block and the second clamping block for clamping or loosening the track by rotating is as follows: the two first clamping blocks rotate in opposite directions under the action of the connecting rod assembly, and when the first clamping blocks rotate in opposite directions, they are away from the track, and when they rotate in opposite directions, they are close to the track; the second clamping block rotates in opposite directions under the action of the connecting rod assembly, and when the second clamping blocks rotate in opposite directions, they are away from the track, and when they rotate in opposite directions, they are close to the track.

[0014] The specific structure of the connecting rod assembly is as follows: it includes two horizontal, symmetrical and cross-arranged middle rods, and the intersection of the middle rods is hinged to the support through a vertically arranged second connecting shaft; a horizontally arranged connecting arm is provided on the top of the first clamping block and the second clamping block, one end of the connecting arm is fixedly connected to the first clamping block or the second clamping block, and the other end is provided with an oblong hole; the two ends of the middle rod are respectively provided with a vertically arranged first sliding rod and a second sliding rod, and the first sliding rod and the second sliding rod are inserted into the oblong hole.

[0015] The specific structure of the push-pull electromagnet driving the first clamping block and the second clamping block to rotate is: the driving end of the push rod is connected to two driving rods, one end of the driving rod is hinged to the driving end of the push rod, and the other end is hinged to a first sliding rod respectively.

[0016] In order to improve the stability of the first clamping block and the second clamping block in clamping the rail, a further design is that the opening and closing ends of the first clamping block and the second clamping block are both provided with horizontally extending slots for clamping the head of the rail.

[0017] When the first clamp and the second clamp clamp the track, they will be subject to the reaction force of the track; the connection point when the first clamp and the second clamp clamp the track, the line connecting this connection point and the first connecting shaft is set to a, and the angle formed by a and the track is set to β. The larger the value of β, the larger the component force generated by the reaction force in the direction parallel to the track, and this component force will drive the first clamp or the second clamp away from the track, thereby the stability of the track clamped by the first clamp and the second clamp is worse. Based on this, further improvements are: the opposite sides of the first clamp and the second clamp are set to clamping surfaces, and the clamping surfaces are used to clamp the track; the distance between the clamping surface and the first connecting shaft decreases from one end of the clamping surface to the other end; the clamping surfaces of the two first clamps or the two second clamps are adjacent to the end with the smallest distance from the first connecting shaft.

[0018] In the case of installation error, when the first clamp block and the second clamp block clamp the track, there may be a situation where the pressure between the first clamp block and the track is not yet rotated to the set position, and there is no pressure between the second clamp block and the track. Based on this, a further improvement is that: the support can slide on the frame, and its sliding direction is perpendicular to the length direction of the track, so that when the first clamp block and the second clamp block clamp the track, the distance from the track can be automatically adjusted to be consistent; the upper end of the support is provided with a protrusion, and the upper end surface of the protrusion is provided with a horizontally arranged dovetail groove; the lower end of the frame is provided with a trapezoidal slider that engages the dovetail groove. In this way, if the distance between the first clamp block and the track is smaller than the distance between the second clamp block and the guide rail, when the first clamp block applies pressure to the track, its reaction force will drive the support to move, automatically adjust the distance between the first clamp block, the second clamp block and the track, so that the distance between the first clamp block, the second clamp block and the track is equal, and the pressure on the track is also consistent, so that the stability of the first clamp block and the second clamp block clamping the track is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the structure of the utility model installed on a crane frame;

[0021] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 It is a structural schematic diagram of the utility model;

[0023] Figure 4 It is a structural schematic diagram of some hidden parts of the utility model;

[0024] Figure 5 It is a top view of the hidden parts of the utility model;

[0025] Figure 6 It is the front view of the utility model;

[0026] Figure 7 It is a right view of the utility model;

[0027] Figure 8 This Figure 5 Top view after adding tracks in ;

[0028] In the figure: 1, support; 2, frame; 3, first clamping block; 4, second clamping block; 5, track; 6, push-pull electromagnet; 7, first connecting shaft; 8, middle rod; 9, second connecting shaft; 10, connecting arm; 11, protrusion; 12, plate frame; 13, connecting plate; 14, travel switch; 21, slider; 31, slot; 32, clamping surface; 61, push rod; 62, spring; 63, protruding plate; 64, driving rod; 81, first slide rod; 82, second slide rod; 101, oblong hole; 111, dovetail groove; 121, support plate; 122, vertical plate; 123, reinforcing plate. DETAILED DESCRIPTION

[0029] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0030] like Figure 1 As shown, the utility model discloses an automatic rail clamp for a crane, comprising a support 1 installed at the lower end of a crane frame 2.

[0031] The support 1 includes two symmetrically arranged plate frames 12 distributed on both sides of the track 5. The plate frame 12 includes a horizontally arranged support plate 121, and a vertical plate 122 is vertically connected to the upper side of the support plate 121 away from the track 5. A reinforcing plate 123 is also connected between the support plate 121 and the vertical plate 122 to improve the structural stability of the plate frame 12. A connecting plate 13 is connected between the upper end surfaces of the two vertical plates 122, so as to connect the two plate frames 12 into a whole.

[0032] Two first clamping blocks 3 and two second clamping blocks 4 are installed on the support plate 121, and the first clamping blocks 3 and the second clamping blocks 4 are symmetrically distributed on both sides of the head of the track 5. Figure 2 As shown, the first clamping block 3 and the second clamping block 4 are both hinged to the support 1 through the first connecting shaft 7 and rotate in the horizontal direction.

[0033] like Figure 3-7 As shown, the tops of the first clamp block 3 and the second clamp block 4 both penetrate upward through the connecting plate 13, and a horizontally arranged connecting arm 10 is installed on the top. One end of the connecting arm 10 is fixedly connected to the first clamp block 3 or the second clamp block 4, and the other end is provided with an oblong hole 101 extending along the length direction of the connecting arm 10.

[0034] A horizontally arranged push-pull electromagnet 6 is installed at one end of the upper side of the connecting plate 13, and its push rod 61 passes through both ends of the electromagnet. A raised convex plate 63 is provided at the outer end of the push rod 61, which is directly larger than the diameter of the push rod 61. A spring 62 that is sleeved on the push rod 61 is installed between the convex plate 63 and the electromagnet.

[0035] The inner end of the push rod 61 drives the first clamping block 3 and the second clamping block 4 to clamp or release the track 5 through the connecting rod assembly. The connecting rod assembly includes two horizontal, symmetrical and cross-arranged middle rods 8, the intersection of which is hinged to the support 1 through a vertically arranged second connecting shaft 9, and the lower end of the second connecting shaft 9 is fixed to the connecting plate 13. The two ends of the middle rod 8 are respectively provided with a vertically arranged first sliding rod 81 and a second sliding rod 82, and the first sliding rod 81 and the second sliding rod 82 are inserted into the oblong hole 101.

[0036] The inner end of the push rod 61 is connected to two driving rods 64 , one end of the driving rod 64 is hinged to the inner end of the push rod 61 , and the other end is hinged to a first sliding rod 81 .

[0037] With the above arrangement, when the push-pull electromagnet 6 is energized, the electromagnet is energized, driving the push rod 61 to move to one side, driving the first clamping block 3 and the second clamping block 4 to rotate in opposite directions, and the two first clamping blocks 3 and the two second clamping blocks 4 all rotate in opposite directions and away from the track 5.

[0038] When the push-pull electromagnet 6 is powered off, the spring 62 is reset, driving the push rod 61 to move in the opposite direction, and driving the first clamping block 3 and the second clamping block 4 to rotate toward each other. The two first clamping blocks 3 and the two second clamping blocks 4 all rotate toward each other to clamp the rail 5.

[0039] The opening and closing ends of the first clamping block 3 and the second clamping block 4 are both provided with a clamping groove 31 extending in the horizontal direction, which is clamped to the head of the rail 5 to improve the stability of the first clamping block 3 and the second clamping block 4 clamping the rail 5 .

[0040] When the first clamp block 3 and the second clamp block 4 clamp the track 5, they will be subjected to the reaction force of the track 5; the connection between the first clamp block 3 and the second clamp block 4 when clamping the track 5, such as Figure 8 As shown, the line connecting this connection point and the first connecting shaft 7 is set as a, and the angle formed by a and the track 5 is set as β. The larger the value of β, the larger the component force generated by the reaction force in the direction parallel to the track 5, and this component force will drive the first clamp 3 or the second clamp 4 away from the track 5, thereby the stability of the first clamp 3 and the second clamp 4 clamping the track 5 is lower, so the following design is made: the surface of the first clamp 3 and the second clamp 4 contacting the track 5 is set as the clamping surface 32; the distance between the clamping surface 32 and the first connecting shaft 7 decreases from one end to the other end of the clamping surface 32; the clamping surfaces 32 of the two first clamps 3 or the two second clamps 4 are adjacent to the end with the minimum distance from the first connecting shaft 7. When the first clamp 3 and the second clamp 4 rotate towards each other, the pressure between them and the track 5 will become greater and greater, and during the rotation process, the value of β will become smaller and smaller. When the first clamping block 3 and the second clamping block 4 rotate to clamp the track 5, the value of β is the smallest, and the component force generated by the reaction force in the direction parallel to the track 5 is also the smallest, so the stability of the first clamping block 3 and the second clamping block 4 clamping the track 5 is the highest.

[0041] In case of installation error, when the first clamp 3 and the second clamp 4 clamp the track 5, there may be a situation where pressure is generated between the first clamp 3 and the track 5 and the track 5 has not been rotated to the set position, and there is no pressure between the second clamp 4 and the track 5. Therefore, the following design is made: the support 1 can slide on the frame 2, and its sliding direction is perpendicular to the length direction of the track 5, so that when the first clamp 3 and the second clamp 4 clamp the track 5, the distance with the track 5 can be automatically adjusted to be consistent; the upper end of the support 1 is provided with a protrusion 11, and the upper end surface of the protrusion 11 is provided with a horizontally arranged dovetail groove 111; the lower end of the frame 2 is provided with a trapezoidal slider 21 that engages with the dovetail groove 111. In such a configuration, if the distance between the first clamp block 3 and the track 5 is smaller than the distance between the second clamp block 4 and the guide rail, when the first clamp block 3 applies pressure to the track 5, its reaction force will drive the support 1 to move, and automatically adjust the distance between the first clamp block 3, the second clamp block 4 and the track 5, so that the distance between the first clamp block 3, the second clamp block 4 and the track 5 is equal, and the pressure on the track 5 is also consistent, so that the stability of the first clamp block 3 and the second clamp block 4 clamping the track 5 is higher.

[0042] A travel switch 14 is also installed on the connecting plate 13, corresponding to one of the first clamping blocks 3, and is used to determine the position of the first clamping block 3. When the first clamping block 3 is in the open state, the crane starts to move.

[0043] The beneficial effects of the utility model are: 1. The push-pull electromagnet 6 drives the first clamping block 3 and the second clamping block 4 to clamp the track 5 by powering off, so it will not be affected by strong winds or earthquakes and can stably brake and stop the vehicle; 2. The first clamping block 3 and the second clamping block 4 are both set in two, and the contact area with the track 5 is larger, the friction force is also greater, and the braking effect is better; 3. The first clamping block 3 and the second clamping block 4 approach or move away from the track 5 by rotating, which occupies less space than the first clamping block 3 and the second clamping block 4 approach or move away from the track 5 by linear movement.

[0044] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An automatic rail clamp for a crane, characterized in that: It comprises a support (1) mounted on the lower end of a crane frame (2); Two first clamping blocks (3) and two second clamping blocks (4) are installed on the support (1), and the first clamping blocks (3) and the second clamping blocks (4) are symmetrically distributed on both sides of the head of the track (5); The support (1) is also provided with a push-pull electromagnet (6), and the outer end of the push rod (61) is provided with a spring (62); When the push-pull electromagnet (6) is energized, the electromagnet is energized, driving the push rod (61) to move to one side, driving the first clamping block (3) and the second clamping block (4) to move in opposite directions and away from the track (5); When the push-pull electromagnet (6) is powered off, the spring (62) is reset, driving the push rod (61) to move in the opposite direction, and driving the first clamping block (3) and the second clamping block (4) to move towards each other, thereby clamping the track (5).

2. The automatic rail clamp for a crane according to claim 1, characterized in that: The first clamping block (3) and the second clamping block (4) are both hinged to the support (1) via a first connecting shaft (7) and rotate in a horizontal direction.

3. The automatic rail clamp for a crane according to claim 2, characterized in that: The two first clamping blocks (3) rotate in opposite directions under the action of the connecting rod assembly. When the first clamping blocks (3) rotate in opposite directions, they move away from the track (5), and when they rotate in opposite directions, they move closer to the track (5); The second clamping block (4) rotates in the opposite direction under the action of the connecting rod assembly. When the second clamping block (4) rotates in the opposite direction, it moves away from the track (5), and when it rotates in the opposite direction, it moves closer to the track (5).

4. The automatic rail clamp for a crane according to claim 3, characterized in that: The connecting rod assembly comprises two horizontal, symmetrical and cross-arranged middle rods (8), the intersection of which is hinged to the support (1) via a vertically arranged second connecting shaft (9); A horizontally arranged connecting arm (10) is provided on the top of the first clamping block (3) and the second clamping block (4); one end of the connecting arm (10) is fixedly connected to the first clamping block (3) or the second clamping block (4), and the other end is provided with an oblong hole (101); A first sliding rod (81) and a second sliding rod (82) are respectively arranged vertically at both ends of the middle rod (8), and the first sliding rod (81) and the second sliding rod (82) are inserted into the oblong hole (101).

5. The automatic rail clamp for a crane according to claim 4, characterized in that: The driving end of the push rod (61) is connected to two driving rods (64), one end of the driving rod (64) is hinged to the driving end of the push rod (61), and the other end is respectively hinged to a first sliding rod (81).

6. The automatic rail clamp for a crane according to claim 1, characterized in that: The opening and closing ends of the first clamping block (3) and the second clamping block (4) are both provided with a clamping groove (31) extending in the horizontal direction, which is clamped to the head of the track (5).

7. The automatic rail clamp for a crane according to claim 1, characterized in that: The surfaces of the first clamping block (3) and the second clamping block (4) in contact with the track (5) are set as clamping surfaces (32); The distance between the clamping surface (32) and the first connecting shaft (7) decreases from one end of the clamping surface (32) to the other end; The clamping surfaces (32) of the two first clamping blocks (3) or the two second clamping blocks (4) are adjacent to one end at the minimum distance from the first connecting shaft (7).

8. The automatic rail clamp for a crane according to claim 1, characterized in that: The support (1) is slidable on the frame (2), and its sliding direction is perpendicular to the length direction of the track (5), so that when the first clamping block (3) and the second clamping block (4) clamp the track (5), the distance between them and the track (5) can be automatically adjusted to be consistent; The upper end of the support (1) is provided with a convex block (11), and the upper end surface of the convex block (11) is provided with a horizontally arranged dovetail groove (111); The lower end of the frame (2) is provided with a trapezoidal sliding block (21) that is engaged with the dovetail groove (111).

Images