Mechanical clamping device for steel rail fixed-point detection equipment

Abstract

The utility model discloses a mechanical clamping device for steel rail fixed-point detection equipment, and belongs to the technical field of steel rail detection equipment. The device comprises a supporting frame, a connecting plate, a vertical guide block, a screw assembly, a left clamping jaw and a right clamping jaw, the connecting plate is used for being connected with a rack body of detection equipment, a vertical guide block is arranged in the supporting frame, the screw assembly drives the vertical guide block to move in the vertical direction, the vertical guide block drives the left clamping jaw and the right clamping jaw to synchronously open and close around middle rotating shafts of the left clamping jaw and the right clamping jaw through connecting rods on the two sides, and clamping and loosening of a steel rail are achieved. And a replaceable clamping fixture is arranged at the bottom of the clamping jaw. The device is further provided with a protective cover to protect internal mechanisms. A pure mechanical clamping mode is adopted, clamping force is stable and adjustable, self-locking is reliable, the device adapts to steel rails of different models and surface states, the problem that fixing is not firm in a traditional magnetic adsorption mode is effectively solved, and the stability and measuring precision of steel rail fixed-point detection are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail detection equipment technical field, especially a kind of mechanical clamping device for rail fixed-point detection equipment. BACKGROUND

[0002] In the operation process of rail track, due to wheel-rail interaction, rail material, line conditions and personnel operation, etc., abnormal contact relationship exists on the surface or subsurface of wheel-rail contact, which further causes local defects in rail section. The traditional detection equipment is usually fixed on the rail by magnetic adsorption method, and the equipment is adsorbed on the top surface or side surface of the rail by magnetic force for measurement. However, this fixing method has obvious disadvantages in practical application:

[0003] 1. High risk of adsorption failure: the rail operation environment is complex, and the rail surface is often attached with oil stains, rust marks, dust, frost and snow, etc. There may be welding slag or burrs left over at the turnout and joint. These pollutants can significantly weaken the effective contact and magnetic flux between the magnet and the rail, resulting in a decrease in adsorption force or even complete failure, and the equipment is prone to slip or fall during measurement.

[0004] 2. Poor adaptability: the rail head profile and size of rails of different lines and different wear stages are different. The magnetic adsorption method usually relies on a fixed adsorption plane, which is difficult to adapt to the side surface of rails of various shapes, which may cause the equipment installation posture to be non-standard, introducing measurement error.

[0005] 3. Insufficient stability: the strength of magnetic adsorption is greatly affected by the contact area and surface condition, and cannot provide active and adjustable clamping force. Under the vibration caused by train passing or accidental touching of personnel, the equipment is prone to micro-motion, affecting the repeatability and accuracy of measurement data.

[0006] 4. Safety is questionable: in electrified railways or sections with track return lines, strong magnetic fields may pose a potential interference risk, although it is usually small, but it is still a consideration factor for some rigorous occasions.

[0007] Therefore, there is an urgent need for a clamping device that does not rely on magnetic force, has stable and reliable clamping force, can adapt to different rail models and surface conditions, and is easy to operate, to provide a solid installation foundation for high-precision fixed-point detection of rails. UTILITY MODEL CONTENTS

[0008] In view of the above problems in the prior art, the utility model aims to provide a mechanical clamping device for rail fixed-point detection equipment to solve the problem of unstable fixation of traditional detection equipment using magnetic adsorption method.

[0009] In order to achieve the above-mentioned utility model purposes, the utility model adopts the technical scheme as follows:

[0010] A mechanical clamping device for a steel rail fixed-point detection device is provided, which comprises a support frame, one side of the support frame is provided with a connecting plate, the connecting plate is used for fixed connection with a rack main body, the rack main body is provided with a steel rail fixed-point detection device;

[0011] The inside of the support frame is provided with a vertical guide block, and a screw rod assembly is threadedly connected to the support frame;

[0012] The side surface of the connecting plate close to the direction of the support frame is symmetrically provided with a left clamping jaw and a right clamping jaw; the middle parts of the left clamping jaw and the right clamping jaw are rotationally connected with the connecting plate through a rotating shaft, the top parts of the left clamping jaw and the right clamping jaw are hingedly connected with the two sides of the vertical guide block through a connecting rod, the screw rod assembly drives the vertical guide block to move in the vertical direction, and the vertical guide block drives the left clamping jaw and the right clamping jaw to open and close synchronously through the connecting rod.

[0013] Further, after the support frame and the connecting plate are connected, an installation cavity is formed in the support frame, the vertical guide block is located in the installation cavity, a roller is arranged on the vertical guide block, a sliding groove matched with the roller is arranged in the installation cavity, and the roller and the sliding groove form a vertical guide mechanism.

[0014] Further, the two ends of the connecting rod are respectively hingedly connected with the top parts of the left clamping jaw or the right clamping jaw and one side of the vertical guide block.

[0015] Further, a clamping clamp is detachably connected to the clamping surface of the bottom part of the left clamping jaw and the right clamping jaw.

[0016] Further, the clamping clamp is in the form of a rectangular plate structure, the clamping clamp is fixedly connected with the clamping surface of the bottom part of the left clamping jaw and the right clamping jaw through locking screws, and a plurality of anti-skid strips are protrusively arranged on the contact surface of the clamping clamp and the steel rail.

[0017] Further, the screw rod assembly comprises a manual handle and a screw rod, the bottom part of the screw rod is connected with the vertical guide block through the support frame, the screw rod is threadedly connected with the support frame, the bottom part of the screw rod is provided with a collar used for being in contact with the lower end surface of the vertical guide block, and the collar is used for transmitting axial force in the rotating process of the screw rod; the top part of the screw rod is located outside the support frame and is fixedly provided with the manual handle.

[0018] Further, the other side of the support frame is provided with a protective cover, the top part and the side part of the protective cover are fixedly connected with the connecting plate, a protection area is formed after the protective cover is connected with the connecting plate, and the support frame is located in the protection area.

[0019] Compared with the traditional detection equipment adopting the magnet adsorption mode and being fixed on the rail box wall, the mechanical clamping device for the rail fixed-point detection equipment has the advantages that:

[0020] 1、 the mechanical clamping device for the rail fixed-point detection equipment, through the rotating screw assembly, the operator can intuitively and continuously control the force applied on the vertical guide block, and the clamping jaw is transmitted after being amplified through the connecting rod mechanism. The clamping force is determined by the operator, and sufficient fastening force can be provided under various conditions, the dependence on the magnetic force is completely eliminated, and the influence of factors such as the surface material of the rail, pollutants and temperature is eliminated, and the unstable problem of magnetic adsorption is fundamentally solved.

[0021] 2、 the mechanical clamping device for the rail fixed-point detection equipment, the left clamping jaw and the right clamping jaw symmetrically arranged are hinged with the vertical guide block through the connecting rod, so that the movement distance and speed of the left and right clamping jaws are basically consistent at any moment, the device can be automatically centered on the rail center, and the installation posture of the detection equipment is ensured to be correct.

[0022] 3、 the mechanical clamping device for the rail fixed-point detection equipment, a 'roller-groove' pair is adopted instead of a simple plane sliding friction pair. The roller converts the sliding friction between the vertical guide block and the installation cavity wall surface into rolling friction. The rolling friction coefficient is much smaller than the sliding friction, so that the vertical guide block moves up and down extremely smoothly, and there is no jamming feeling. This is beneficial to the fine adjustment of the clamping force by the operator, and also ensures the sensitivity of the mechanism response; the constraint effect of the sliding groove on the roller is strong, and the front and rear or left and right deflection of the vertical guide block during the movement process can be effectively prevented, and the movement track of the vertical guide block is ensured to be strictly vertical.

[0023] 4、 the mechanical clamping device for the rail fixed-point detection equipment, pure mechanical design is adopted, and the mechanical structure is less affected by climate, temperature and surface pollution, and the durability in the harsh railway environment is further enhanced by the protective cover design. DRAWINGS

[0024] Figure 1 It is an installation structure schematic view of the mechanical clamping device for the rail fixed-point detection equipment.

[0025] Figure 2 It is a structure schematic view of the mechanical clamping device.

[0026] Figure 3 It is an internal structure schematic view of the mechanical clamping device after the protective cover is removed.

[0027] Figure 4 It is a side view sectional view schematic view of the mechanical clamping device.

[0028] Wherein, A, mechanical clamping device; 1, machine frame main body; 2, rail fixed point detection equipment; 3, rail; 4, support frame; 5, connecting plate; 6, vertical guide block; 7, screw assembly; 701, manual handle; 702, screw; 8, left clamping jaw; 9, right clamping jaw; 10, rotating shaft; 11, connecting rod; 12, mounting cavity; 13, roller; 14, sliding groove; 15, clamping fixture; 16, collar; 17, protective cover. DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model are described below, so that the person skilled in the art can understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific embodiments, for the person skilled in the ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the appended claims, these changes are obvious, all the invention and creation using the concept of the utility model are within the scope of protection.

[0030] As Figures 1-4 Indicated, the utility model provides a kind of mechanical clamping device A for rail fixed point detection equipment, mechanical clamping device A as an independent module, through the mounting hole on its connecting plate 5, using bolt is fixed on the machine frame main body 1 of a rail fixed point detection equipment 2.Machine frame main body 1 is designed according to the function of rail fixed point detection equipment 2, mainly used to adjust the position and angle of equipment measuring probe, and mechanical clamping device A is responsible for the whole machine frame main body 1 and rail fixed point detection equipment 2 firmly fixed on rail 3.

[0031] The core frame of mechanical clamping device A is welded or fastened by screw by support frame 4 and connecting plate 5.Support frame 4 is substantially U-shaped or box-shaped, and forms an installation cavity 12 open in two side directions in its interior after being combined with connecting plate 5.

[0032] As Figures 3-4 Indicated, in installation cavity 12, a vertical guide block 6 is provided.Two rollers 13 (total four) are installed on the left and right sides of the vertical guide block 6 respectively through a pair of bearings.Correspondingly, an accurate longitudinal sliding groove 14 is processed on the left and right inner walls of installation cavity 12.Two side rollers 13 are respectively embedded in corresponding sliding groove 14, so that vertical guide block 6 is constrained in installation cavity 12, and can only make smooth rolling motion in the direction of sliding groove 14 (i.e. vertical direction).

[0033] A threaded hole is formed in the center of the top of the support frame 4. A screw assembly 7 passes through the hole. The screw assembly 7 includes a hand knob 701 on the outside and a screw rod 702. The screw rod 702 is screwed into the threaded hole in the top of the support frame 4. A through hole is formed in the center of the top of the vertical guide block 6. A boss is formed on the front section of the screw rod 702. The boss is in contact with the upper end surface of the vertical guide block 6. The end of the screw rod 702 passes through the through hole and has a ring groove formed thereon. A collar 16 is fitted into the ring groove. The collar 16 is in contact with the lower end surface of the vertical guide block 6. When the hand knob 701 is rotated, the screw rod 702 rotates and moves axially downward or upward due to the effect of the screw pair. When the screw rod 702 moves downward, the boss on the screw rod 702 pushes the vertical guide block 6 to move downward. When the screw rod 702 moves upward, the collar 16 pulls the vertical guide block 6 to move upward.

[0034] A left clamping jaw 8 and a right clamping jaw 9 are symmetrically installed on the side of the connecting plate 5 facing the support frame 4. The middle of each clamping jaw is hingedly connected to the connecting plate 5 by a horizontal pivot 10. The clamping jaws can rotate like scissors around the pivot 10. The top (upper end) of each clamping jaw is hingedly connected to one end of a connecting rod 11 by a hinge pin. The other end of each connecting rod 11 is hingedly connected to the left and right sides of the vertical guide block 6. Thus, the vertical guide block 6, the two connecting rods 11, the left clamping jaw 8, the right clamping jaw 9, and the connecting plate 5 together form two sets of symmetric connecting rod 11 mechanisms that convert vertical movement into clamping jaw swinging.

[0035] A clamping clamp 15 is fixedly installed on the clamping end of the bottom of each clamping jaw 8 and 9 by two locking screws. Figure 3 As shown in the figure, the clamping clamp 15 is a rectangular steel plate. The side in contact with the rail is milled or die-cast with multiple parallel, raised diamond-shaped anti-slip strips. The screw connection facilitates replacement of the clamp when it wears out.

[0036] In addition, as shown in Figure 1 and Figure 2 A protective cover 17 made of metal or high-strength engineering plastic is installed on the back of the support frame 4 (the side facing away from the rail) by screws. The protective cover 17 is shaped to fit the support frame 4 and the connecting plate 5. Its top and sides are fastened to the connecting plate 5, completely covering the internal mechanisms of the support frame 4, the lower part of the screw rod 702, the vertical guide block 6, and the hinge points of the connecting rods 11, forming a clean and safe protective area.

[0037] The installation and clamping process of the mechanical clamping device A includes:

[0038] Step 1, the operator will be equipped with steel rail fixed-point detection equipment rack body together with the mechanical clamping device A, across the measured steel rail 3, so that the rail head between the left jaw 8 and the right jaw 9.

[0039] Step 2, clockwise rotation of the hand knob 701, screw rod 702 into the support frame 4, resulting in downward axial displacement.

[0040] Step 3, the screw rod 702 pushes the vertical guide block 6 downward.

[0041] Step 4, the vertical guide block 6 along the sliding slot 14 smoothly down, through two connecting rods 11 push the left jaw 8 and the right jaw 9 of the top of the outward movement.

[0042] Step 5, because the left jaw 8 and the right jaw 9 in the middle of the shaft 10 constraint, according to the principle of lever, the bottom of the left jaw 8 and the right jaw 9 synchronous swing in, gradually close to and eventually contact the two sides of the steel rail 3.

[0043] Step 6, continue to rotate the hand knob 701, screw rod 702 continues to press down, the powerful clamping force through the connecting rod 11 mechanism to the clamping fixture 15, so that its anti-skid strip tightly "bite" the side of the rail. Because of the thread self locking, the clamping force is maintained.

[0044] Step 7, at this time, the device through two jaws from both sides of the steel rail, and the rack body 1 or the upper part of the connecting plate 5 has a support point against the top surface of the steel rail, forming a stable "three point" fixed. Steel rail fixed-point detection equipment is firmly locked in the measurement position.

[0045] The disassembly process of the mechanical clamping device A includes: after the measurement, counterclockwise rotation of the hand knob 701, screw rod 702 upward movement, through the ring 16 driven vertical guide block 6 up. The vertical guide block 6 through the connecting rod 11 pull the top of the left jaw 8 and the right jaw 9 of the in. The bottom of the left jaw 8 and the right jaw 9 is opened outward, away from the contact with the steel rail 3. When the jaw is opened to a wide enough, the whole steel rail fixed-point detection equipment 2 can be taken off from the steel rail 3.

[0046] In summary, the mechanical clamping device A of the utility model realizes the stable, reliable, self adaptive mechanical clamping of the steel rail, completely overcomes the inherent defects of the traditional magnetic adsorption method, provides an ideal installation fixed solution for the high precision fixed-point detection of the steel rail, and has great market application prospect.

Claims

1. A mechanical clamping device for rail positioning and testing equipment, characterized in that, The system includes a support frame, a connecting plate on one side of the support frame for fixed connection with the main frame body, and a rail positioning detection device on the main frame body. The support frame is equipped with a vertical guide block inside, and a screw assembly is threadedly connected to the support frame; The connecting plate has a left gripper and a right gripper symmetrically arranged on one side near the support frame. The middle of the left gripper and the right gripper are rotatably connected to the connecting plate via a pivot. The top of the left gripper and the right gripper are hinged to both sides of the vertical guide block via a connecting rod. The screw assembly drives the vertical guide block to move in the vertical direction. The vertical guide block drives the left gripper and the right gripper to open and close synchronously via the connecting rod.

2. The mechanical clamping device for rail positioning detection equipment according to claim 1, characterized in that, After the support frame and the connecting plate are connected, an installation cavity is formed inside the support frame. The vertical guide block is located in the installation cavity. A roller is provided on the vertical guide block. A sliding groove that cooperates with the roller is provided in the installation cavity. The roller and the sliding groove constitute a vertical guide mechanism.

3. The mechanical clamping device for rail positioning detection equipment according to claim 1, characterized in that, The two ends of the connecting rod are respectively hinged to the top of the left or right gripper and one side of the vertical guide block.

4. The mechanical clamping device for rail positioning detection equipment according to claim 1, characterized in that, Clamping fixtures are detachably connected to the clamping surfaces at the bottom of the left and right jaws.

5. The mechanical clamping device for rail positioning detection equipment according to claim 4, characterized in that, The clamping fixture has a rectangular plate-like structure. The clamping fixture is fixedly connected to the clamping surfaces at the bottom of the left and right jaws by locking screws. Multiple anti-slip strips are raised on the contact surface between the clamping fixture and the rail.

6. The mechanical clamping device for rail positioning detection equipment according to claim 1, characterized in that, The screw assembly includes a manual handle and a screw. The bottom of the screw passes through the support frame and is connected to the vertical guide block. The screw and the support frame are threaded together. The bottom of the screw is provided with a retaining ring for contacting the lower end face of the vertical guide block. The retaining ring is used to transmit axial force during the rotation of the screw. The top of the screw is located outside the support frame and the manual handle is fixedly installed on it.

7. The mechanical clamping device for rail positioning detection equipment according to any one of claims 1 to 6, characterized in that, A protective cover is provided on the other side of the support frame. The top and sides of the protective cover are fixedly connected to the connecting plate. After the protective cover is connected to the connecting plate, a protective area is formed, and the support frame is located within the protective area.

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