Steel rail hoisting clamp

Abstract

The utility model discloses a steel rail hoisting clamp. The steel rail hoisting clamp comprises a first clamp, a second clamp and a locking device, the middle of the first clamping rod is rotatably connected with the middle of the second clamping rod through a third pin shaft, the second end of the first clamping rod is rotatably connected with the first end of the second connecting plate through a first pin shaft, and the second end of the second clamping rod is rotatably connected with the first end of the first connecting plate through a second pin shaft. The second end of the first connecting plate is rotatably connected with the second end of the second connecting plate through a fourth pin shaft; according to the utility model, the pin shaft is used as a rotating shaft of the clamp connecting plate and the clamping rod, and after the clamp clamps the steel rail and lifts the steel rail, the clamp can automatically clamp the steel rail under the action of gravity, so that the step of manually fixing the clamp is omitted; and the locking device adopts a self-locking limiting block with an inclined surface, so that the pin shaft can directly slide into the clamping groove in one direction conveniently when the operating rod is pressed down and is automatically locked under the elastic force action of the spring, the operation is convenient, and the operation steps are simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of rail hoisting, in particular to a rail hoisting clamp. Background Art

[0002] A rail hoisting clamp is a device used to safely and efficiently suspend and transport rails. During the operations of lifting, unloading, and stacking rails, generally, machinery is used in combination with wire ropes to sling and tie, or special rail clamps are used for the operations. Currently, the generally used rail hoisting clamps have only a single rotating shaft and no self-tightening and self-locking functions. After manually clamping the clamp, the fixed screw rod needs to be rotated to lock, with cumbersome operation steps, low efficiency in hoisting and transferring operations, and because the locking operation is complicated, steps are easily omitted or the locking is not in place, which may lead to the rail falling off, posing a great potential safety hazard.

[0003] Therefore, it is necessary to develop a rail hoisting clamp to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to design a rail hoisting clamp to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A rail hoisting clamp, comprising:

[0007] A first clamp;

[0008] A second clamp; the first clamp and the second clamp have the same structural shape, the first clamp and the second clamp are arranged in parallel, both the first clamp and the second clamp include a first connecting plate, a second connecting plate, a first clamping rod, and a second clamping rod. The first clamp and the second clamp share a first pin shaft, a second pin shaft, a third pin shaft, and a fourth pin shaft. Hooks are arranged at the first ends of the first clamping rod and the second clamping rod, and the hook bending directions of the hooks of the first clamping rod and the second clamping rod are both inward. The middle parts of the first clamping rod and the second clamping rod are rotatably connected through the third pin shaft. The second end of the first clamping rod is rotatably connected to the first end of the second connecting plate through the first pin shaft. The second end of the second clamping rod is rotatably connected to the first end of the first connecting plate through the second pin shaft. The second end of the first connecting plate is rotatably connected to the second end of the second connecting plate through the fourth pin shaft;

[0009] A locking device; the locking device includes an operating rod, the first end of the operating rod is rotatably sleeved on the first pin shaft, a clamping groove is arranged below the middle part of the operating rod, and after the hooks of the first clamping rod and the second clamping rod are hooked on the rail, the clamping groove of the operating rod is clamped into the second pin shaft.

[0010] Specifically, the locking device further includes a spring, a pull rod, and a self-locking limit block. The spring is sleeved on the pull rod. The pull rod is parallel to the operating rod. The first end of the spring is fixedly positioned, and the second end of the spring is fixed to the side wall of the pull rod. A handle is provided at the first end of the pull rod. The second end of the pull rod is connected to the first end of the self-locking limit block. When the spring is in a non-compressed and non-stretched state, the second end of the self-locking limit block partially blocks the opening of the card slot.

[0011] Specifically, the locking device further includes a cylinder shell and a cap. The cylinder shell is parallel to the operating rod and is fixed on the operating rod. The spring is placed inside the cylinder shell. The cap is formed in a ring shape and is installed at the end of the cylinder shell far from the card slot. The aperture on the cap is smaller than the width of the spring and larger than the diameter of the pull rod. The first end of the spring contacts the cap.

[0012] Furthermore, the end face of the second end of the self-locking limit block is an inclined surface, and the direction of the inclined surface is consistent with the opening direction of the card slot.

[0013] Preferably, the inclined surface is 45°.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The shape of the clamping rod fits the cross-sectional shape of the steel rail, enabling the clamp to tightly hold the steel rail and solving the problems that the clamp cannot tightly hold or fit during hoisting.

[0016] Using the pin shaft as the rotation axis of the clamp connecting plate and the clamping rod, when the clamp holds the steel rail and is lifted, under the action of gravity, the clamp will self-clamp the steel rail, saving the step of manually fixing the clamp.

[0017] The locking device adopts a self-locking limit block with an inclined surface, which facilitates the pin shaft to directly slide into the card slot unidirectionally when the operating rod is pressed down and automatically lock under the action of the spring force, making the operation convenient and simplifying the operation steps.

[0018] The present utility model is small in size, simple and reliable in structure, convenient for maintenance and adjustment, and reduces the manufacturing difficulty. Description of the Drawings

[0019] Figure 1 is a perspective view of the present utility model;

[0020] Figure 2 is a structural schematic diagram of the first clamp in the present utility model;

[0021] Figure 3 is a schematic diagram of the open state of the present utility model.

[0022] In the figure: 1. First connecting plate; 2. First clamping rod; 3. Operating rod; 4. Flange connecting plate; 5. Spring; 6. Pull rod; 7. Self-locking limit block; 8. Cylinder shell; 9. Cap; 10. First pin shaft; 11. Second connecting plate; 12. Second clamping rod; 13. Second pin shaft; 14. Third pin shaft; 15. Fourth pin shaft; 16. First fixture; 17. Second fixture. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0027] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and defined, terms such as "arrangement" and "connection" should be understood in a broad sense. For example, "connection" 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0030] As Figures 1-3 shown, a rail lifting fixture includes:

[0031] A first fixture 16;

[0032] A second fixture 17; the first fixture 16 and the second fixture 17 have the same structural shape, the first fixture 16 and the second fixture 17 are arranged in parallel, the first fixture 16 and the second fixture 17 both include a first connecting plate 1, a second connecting plate 11, a first clamping rod 2, and a second clamping rod 12. The first fixture 16 and the second fixture 17 share a first pin 10, a second pin 13, a third pin 14, and a fourth pin 15. Hooks are provided at the first ends of the first clamping rod 2 and the second clamping rod 12. The hook directions of the hook of the first clamping rod 2 and the hook of the second clamping rod 12 are both inward. The middle parts of the first clamping rod 2 and the second clamping rod 12 are rotatably connected through the third pin 14. The second end of the first clamping rod 2 and the first end of the second connecting plate 11 are rotatably connected through the first pin 10. The second end of the second clamping rod 12 and the first end of the first connecting plate 1 are rotatably connected through the second pin 13. The second end of the first connecting plate 1 and the second end of the second connecting plate 11 are rotatably connected through the fourth pin 15;

[0033] Locking device; the locking device includes an operating rod 3, a spring 5, a pull rod 6, a self-locking limit block 7, a barrel shell 8, and a cap 9. The first end of the operating rod 3 is rotatably sleeved on the first pin shaft 10. A clamping groove is provided below the middle of the operating rod 3. After the hooks of the first clamping rod 2 and the second clamping rod 12 are hooked on the rail, the clamping groove of the operating rod 3 is snapped into the second pin shaft 13. The spring 5 is sleeved on the pull rod 6, and the spring 5 is placed inside the barrel shell 8. The pull rod 6 is parallel to the operating rod 3 and the barrel shell 8. The first end of the spring 5 is in contact and clamped with the cap 9. The second end of the spring 5 is fixed on the side wall of the pull rod 6. A handle is provided at the first end of the pull rod 6. The second end of the pull rod 6 is connected to the first end of the self-locking limit block 7. When the spring 5 is in a non-compressed and non-stretched state, the second end of the self-locking limit block 7 partially blocks the opening of the clamping groove. The barrel shell 8 is fixed on the operating rod 3 through a flange connecting plate 4. The cap 9 is formed in a ring shape. The cap 9 is installed at one end of the barrel shell 8 away from the clamping groove. The aperture on the cap 9 is smaller than the width of the spring 5 and larger than the diameter of the pull rod 6. The end face of the second end of the self-locking limit block 7 is a 45° inclined plane, and the inclined plane faces the same direction as the opening direction of the clamping groove. The clamping groove is an arc-shaped strip hole, and the shape of the arc-shaped strip hole is the rotation trajectory of the second pin shaft 13 around the first pin shaft 10. At the same time, the clamping groove extends horizontally inward by 4 mm to facilitate further self-tightening of the fixture. A transition block is provided on the operating rod 3 at the mouth of the clamping groove. One side of the transition block close to the mouth of the clamping groove is an arc surface, and the arc surface gradually deflects from the inside to the outside towards the first end of the operating rod. The purpose of such a setting is to facilitate the transition and sliding of the second pin shaft 13 into the clamping groove.

[0034] In some embodiments, the middle opening on the cap is rectangular, and correspondingly, the pull rod is cuboid-shaped. Such a structural design plays a role in restricting the deflection of the pull rod and the self-locking limit block.

[0035] Generally, during use, the lifting end of the lifting device is rotatably sleeved in the middle of the fourth pin shaft 15. When the locking device is not working, for the lower fixture, after the lower part of the fixture contacts the top of the rail under the action of gravity, the lower parts of the first clamping rod 2 and the second clamping rod 12 open and are lowered to both sides of the rail. Then the fixture is lifted. Under the action of the lever principle, the connecting plate and the clamping rod both rotate around the pin shaft and tighten each other. The lower ends of the first clamping rod 2 and the second clamping rod 12 clamp the rail to achieve self-tightening of the rail clamping. At this time, the operating rod 3 is pressed down so that the second pin shaft 13 squeezes through the inclined plane of the self-locking limit block 7 and slides into the clamping groove to achieve self-locking. At this time, the spring 5 has experienced compression and is in the process of recovery. When releasing the rail, only need to overcome the elastic force of the spring 5 to pull the handle of the pull rod 6, drive the self-locking limit block 7 to retract, and lift up to release the lock.

[0036] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A rail hoisting fixture, characterized in that: include: First clamp; The second clamp; the first clamp and the second clamp have the same structural shape, the first clamp and the second clamp are arranged in parallel, the first clamp and the second clamp both include a first connecting plate, a second connecting plate, a first clamping rod, and a second clamping rod, the first clamp and the second clamp share a first pin, a second pin, a third pin, and a fourth pin, the first ends of the first clamping rod and the second clamping rod are both provided with hooks, the hooks of the first clamping rod and the hooks of the second clamping rod are bent inward, the middle parts of the first clamping rod and the second clamping rod are rotatably connected through the third pin, the second end of the first clamping rod is rotatably connected to the first end of the second connecting plate through the first pin, the second end of the second clamping rod is rotatably connected to the first end of the first connecting plate through the second pin, and the second end of the first connecting plate is rotatably connected to the second end of the second connecting plate through the fourth pin; The locking device comprises an operating rod, the first end of which can be rotatably mounted on the first pin shaft, and a slot is provided at the lower middle part of the operating rod. After the hooks of the first clamping rod and the second clamping rod are hooked on the rail, the slot of the operating rod is inserted into the second pin shaft.

2. A rail hoisting fixture according to claim 1, characterized in that: The locking device also includes a spring, a pull rod, and a self-locking limit block. The spring is sleeved on the pull rod, the pull rod is parallel to the operating rod, and the first end of the spring is set in a fixed position. The second end of the spring is fixed on the side wall of the pull rod. A handle is set at the first end of the pull rod, and the second end of the pull rod is connected to the first end of the self-locking limit block. When the spring is in a non-compression and tension state, the second end of the self-locking limit block partially blocks the opening of the slot.

3. A rail hoisting fixture according to claim 2, characterized in that: The locking device also includes a cylinder shell and a cover cap. The cylinder shell is parallel to the operating rod and is fixed on the operating rod. The spring is placed in the cylinder shell. The cover cap is formed into a ring shape and is installed on the end of the cylinder shell away from the slot. The aperture on the cover cap is smaller than the width of the spring and larger than the diameter of the pull rod. The first end of the spring is in contact with the cover cap.

4. A rail hoisting fixture according to claim 3, characterized in that: The second end surface of the self-locking limit block is an inclined surface, and the direction of the inclined surface is consistent with the opening direction of the slot.

5. A rail hoisting fixture according to claim 4, characterized in that: The slope is 45°.

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