A new type of hydraulic spring rail clamp

Abstract

This utility model discloses a novel hydraulic spring rail clamp, relating to the field of rail clamping technology. It includes a base, with clamping arms hinged to both sides of the base. A jaw is fixedly connected to the bottom end of each clamping arm. Connecting rods are hinged to the top ends of both clamping arms. The ends of the two connecting rods furthest from the clamping arms are hinged together and driven upwards by a return spring to drive the jaws to perform a clamping action. The connecting rods are hinged to the clamping arms via a first rotating shaft. A drive arm rotatably connected to the first rotating shaft is provided on one side of each clamping arm. The top ends of the two drive arms are hinged together, and the bottom ends of the two drive arms are respectively hinged to the two ends of a hydraulic cylinder. The straight-line distance between the first rotating shaft and the top end of the drive arm is less than the straight-line distance between the first rotating shaft and the bottom end of the drive arm. This novel hydraulic spring rail clamp has low energy consumption and is simple and reliable in structure.

Description

Technical Field

[0001] This utility model relates to the field of rail clamping technology, specifically a novel hydraulic spring rail clamp. Background Technology

[0002] In the field of wind-resistant braking for rail-mounted cranes, hydraulic spring rail clamps are one of the most widely used devices. Their typical structure relies on a spring as the active clamping force source; the driving force generated by the release of the spring pushes the clamping arm to hold the rail. A hydraulic cylinder is used to maintain the pre-compression state of the spring and, when the rail clamp needs to be released, hydraulically overcomes the spring force to release the clamp.

[0003] For example, an automatic hydraulic rail clamp for a hydropower station gantry crane disclosed in patent application number CN202220192867.1 uses a conventional layout for the lever connection structure of the clamp arm, connecting rod, hydraulic push rod, and spring. To ensure clamping force, the spring-driven connecting rod acts on the upper end of the clamp arm to ensure sufficient rail clamping force; the hydraulic cylinder, as a holding mechanism, is located at the top of the clamp arm, resulting in a small length difference between the hydraulic cylinder power arm and the spring resistance arm. This leads to a larger hydraulic cylinder size and higher operating energy consumption.

[0004] Therefore, it is necessary to propose a new type of hydraulic spring rail clamp to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a novel hydraulic spring rail clamp to solve the problem of high energy consumption in existing hydraulic spring rail clamp systems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: A novel hydraulic spring rail clamp includes a base, with clamping arms hinged to both sides of the base. A jaw is fixedly connected to the bottom end of each clamping arm. Connecting rods are hinged to the top ends of both clamping arms. The ends of the two connecting rods furthest from the clamping arms are hinged together and driven upwards by a return spring to drive the jaws to perform clamping action. The connecting rods are hinged to the clamping arms via a first rotating shaft. A drive arm rotatably connected to the first rotating shaft is provided on one side of each clamping arm. The top ends of the two drive arms are hinged together, and the bottom ends of the two drive arms are respectively hinged to both ends of a hydraulic cylinder. The straight-line distance between the first rotating shaft and the top end of the drive arm is less than the straight-line distance between the first rotating shaft and the bottom end of the drive arm.

[0009] Preferably, the reset spring is provided with limiting plates on both sides, and the limiting plates are vertically provided with limiting grooves.

[0010] Preferably, the reset spring is provided with spring seats at both the upper and lower ends. The spring seat located at the top of the reset spring is hinged to the two connecting rods through a second rotating shaft. The second rotating shaft is slidably connected to the limiting plate through a limiting groove.

[0011] Preferably, the top ends of the two drive arms are hinged by a third pivot, which is slidably connected to a limiting plate via a limiting groove.

[0012] Preferably, the bottom end of the drive arm of the clamping arm is rotatably connected to a limit block, and a screw is slidably connected between the two limit blocks, with nuts threaded to both ends of the screw.

[0013] Preferably, there are two sets of clamping arms, which are symmetrically distributed on both sides of the drive arm.

[0014] Preferably, both ends of the base are rotatably connected to track wheels, and the track wheels are offset from the jaws.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a novel hydraulic spring rail clamp, which has the following advantages:

[0017] This novel hydraulic spring rail clamp increases the length of the power arm and the ratio of the power arm to the resistance arm by setting a drive arm on one side of the clamping arm, thereby reducing the energy consumption of the hydraulic cylinder to drive and maintain the return spring in a compressed state; at the same time, it has a simple and reliable structure. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a front view schematic diagram of the clamping arm of this utility model;

[0020] Figure 3 This is a front view schematic diagram of the drive arm of this utility model.

[0021] In the diagram: 1. Drive arm; 2. Connecting rod; 3. Return spring; 4. Clamping arm; 5. Base; 6. Track wheel; 7. Screw; 8. First rotating shaft; 9. Second rotating shaft; 10. Spring seat; 11. Jaw; 12. Third rotating shaft; 13. Limiting groove; 14. Limiting plate; 15. Hydraulic cylinder; 16. Limiting block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-3 As shown, a novel hydraulic spring rail clamp includes a base 5, with clamping arms 4 hinged to both sides of the base 5. A jaw 11 is fixedly connected to the bottom end of each clamping arm 4. Connecting rods 2 are hinged to the top ends of both clamping arms 4. The ends of the two connecting rods 2 furthest from the clamping arms 4 are hinged together and driven upwards by a return spring 3 to drive the jaws 11 to perform clamping actions. The connecting rods 2 are hinged to the clamping arms 4 via a first rotating shaft 8. A drive arm 1 is provided on one side of the clamping arm 4 and rotatably connected to the first rotating shaft 8. The top ends of the two drive arms 1 are hinged together, and the bottom ends of the two drive arms 1 are respectively hinged to both ends of a hydraulic cylinder 15. The straight-line distance between the first rotating shaft 8 and the top end of the drive arm 1 is less than the straight-line distance between the first rotating shaft 8 and the bottom end of the drive arm 1.

[0024] When the track needs to be clamped, the hydraulic cylinder 15 depressurizes, and the return spring 3 pushes the connecting rod 2 to rotate upward. Under the action of the two connecting rods 2, the tops of the two clamping arms 4 rotate away from each other, thereby driving the two jaws 11 to clamp the track. When it is necessary to release the clamp, the hydraulic source pressurizes the hydraulic cylinder 15, and the hydraulic cylinder 15 contracts to drive the two drive arms 1 to rotate, thereby causing the tops of the two clamping arms 4 to move closer to each other. The connecting rod 2 rotates and squeezes the return spring 3. The return spring 3 is compressed by force, and the two jaws 11 move away from each other and release the clamp from the track. By setting the straight-line distance between the first rotating shaft 8 and the top of the drive arm 1 to be less than the straight-line distance between the first rotating shaft 8 and the bottom of the drive arm 1, the length of its power arm is greater than the length of its resistance arm, forming a force-saving lever structure, thereby reducing its energy consumption.

[0025] In some embodiments, limiting plates 14 are provided on both sides of the return spring 3, and limiting grooves 13 are vertically formed on the limiting plates 14. Specifically, spring seats 10 are provided at both the upper and lower ends of the return spring 3. The spring seat 10 located at the bottom end of the return spring 3 is fixedly connected to the base 5, and the spring seat 10 located at the top end of the return spring 3 is hinged to two connecting rods 2 through a second rotating shaft 9. The second rotating shaft 9 is slidably connected to the limiting plates 14 through the limiting grooves 13.

[0026] By setting a limiting plate 14 and opening a limiting groove 13 in its middle to limit the second rotating shaft 9, the two connecting rods 2 and the clamping arm 4 can rotate synchronously, avoiding inconsistent actions that would affect the clamping track of the jaw 11.

[0027] Specifically, the top ends of the two drive arms 1 are hinged by a third rotating shaft 12, which is slidably connected to a limiting plate 14 via a limiting groove 13. Under the limitation of the limiting groove 13, the third rotating shaft 12 can only reciprocate in the vertical direction, so as to ensure that the two drive arms 1 can rotate synchronously when the hydraulic cylinder 15 extends or retracts.

[0028] In some embodiments, a limiting block 16 is rotatably connected to the top of the clamping arm 4, and a screw 7 is slidably connected between the two limiting blocks 16. Nuts are threaded onto both ends of the screw 7. When the hydraulic power source malfunctions and cannot provide pressure to the hydraulic cylinder 15, requiring manual release of the clamping mechanism from the track, the nut on the screw 7 is rotated. Under the pressure of the nut, the bottom ends of the two drive arms 1 rotate towards each other, thereby driving the clamping arm 4 to rotate and release the jaws 11 from the track. When the hydraulic power source is normal, the nut is rotated towards the end of the screw 7 to prevent the nut from interfering with the rotation of the drive arms 1.

[0029] In some embodiments, there are two sets of clamping arms 4, symmetrically distributed on both sides of the drive arm 1. By setting two sets of clamping arms 4, a more stable rail clamping effect can be provided under the action of two sets of jaws 11. At the same time, the drive arm 1 is positioned between the two sets of clamping arms 4, so that the forces on both sides of the drive arm 1 are balanced.

[0030] In order for the base 5 to slide along the track, both ends of the base 5 are rotatably connected to track wheels 6, and the track wheels 6 are misaligned with the jaws 11.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel hydraulic spring rail clamp, comprising a base (5), wherein clamping arms (4) are hinged to both sides of the base (5), and jaws (11) are fixedly connected to the bottom end of each clamping arm (4). Connecting rods (2) are hinged to the top ends of both clamping arms (4), and the ends of the two connecting rods (2) away from the clamping arms (4) are hinged together and driven to rise by a return spring (3) to drive the jaws (11) to perform clamping action, characterized in that: The connecting rod (2) is hinged to the clamping arm (4) via the first rotating shaft (8). One side of the clamping arm (4) is provided with a drive arm (1) that is rotatably connected to the first rotating shaft (8). The top ends of the two drive arms (1) are hinged to each other, and the bottom ends of the two drive arms (1) are respectively hinged to the two ends of the hydraulic cylinder (15). The straight distance between the first rotating shaft (8) and the top end of the drive arm (1) is less than the straight distance between the first rotating shaft (8) and the bottom end of the drive arm (1).

2. A new type of hydraulic spring rail clip according to claim 1, characterized in that: The reset spring (3) is provided with limiting plates (14) on both sides, and the limiting plates (14) are vertically provided with limiting grooves (13).

3. A novel hydraulic spring rail clamp according to claim 2, characterized in that: The reset spring (3) has spring seats (10) at both the top and bottom ends. The spring seat (10) at the top of the reset spring (3) is hinged to the two connecting rods (2) through the second rotating shaft (9). The second rotating shaft (9) is slidably connected to the limiting plate (14) through the limiting groove (13).

4. A novel hydraulic spring rail clamp according to claim 2, characterized in that: The top ends of the two drive arms (1) are hinged by a third pivot (12), which is slidably connected to the limiting plate (14) through a limiting groove (13).

5. A novel hydraulic spring rail clamp according to claim 1, characterized in that: The bottom end of the drive arm (1) of the clamping arm (4) is rotatably connected to a limiting block (16), and a screw (7) is slidably connected between the two limiting blocks (16). Both ends of the screw (7) are threaded with nuts.

6. A novel hydraulic spring rail clamp according to claim 1, characterized in that: There are two sets of clamping arms (4), which are symmetrically distributed on both sides of the drive arm (1).

7. A novel hydraulic spring rail clamp according to claim 1, characterized in that: Both ends of the base (5) are rotatably connected to track wheels (6), and the track wheels (6) are misaligned with the jaws (11).

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