Clamp presser device for steel cord detection

Abstract

The present application relates to steel cord processing technical field, specifically to the clamp pressure rod device for steel cord detection, including pressure rod, connecting rod, positioning pin and spring, the positioning pin includes the pin rod located along the pressure rod axial direction arrangement and the limiting pin fixed perpendicularly in the pin rod second end outer wall, the limiting pin can be active in the key groove along the axial direction of the pressure rod, the limiting pin can adjust the interval along the axis to the pressure rod or connecting rod side, to adjust the pre-pressure between the spring and pressure rod, wherein the pressure rod, connecting rod can pass through the spring and play the elastic buffering effect, make the device service life increases, the detection equipment stability enhances, and can pass through the positioning pin and change the interval between the pressure rod and connecting rod, reach the effect of changing the pre-pressure between the spring and pressure rod, to adapt to different tension steel cord, so do not need to disassemble frequently, and reduce the maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of steel cord processing technology, and more specifically to a clamping rod device for steel cord inspection. Background Technology

[0002] Steel cord is made of high-quality high-carbon steel with a brass-plated surface, consisting of fine-gauge steel wire strands or ropes for special purposes. It is mainly used as a skeleton material for car tires, truck tires, construction machinery tires, or other rubber products. The looseness of the steel cord twist is an important indicator for judging the quality of the cord. During the production process, a looseness detector is used to ensure that the quality of the produced cord products meets the user's requirements. The working principle is that a certain pressure is applied to the steel cord by a clamp, and the steel cord rubs against the clamp at one end to judge the tightness of the cord twist and whether there are any loose defects.

[0003] The existing looseness tester fixture uses a pressure bar device with a fixed tension. However, the testing requirements for different specifications of steel cords vary, so the pressure bar's bearing capacity needs to be changed according to the tension of the steel cord. This results in different pressure bar specifications, which in turn increases the amount of pressure bar maintenance and replacement, as well as the workload and maintenance costs for maintenance personnel. Summary of the Invention

[0004] This invention proposes a clamping rod device for steel cord testing, comprising:

[0005] A pressure rod, wherein a keyway is provided at the first end of the pressure rod and a mounting groove for mounting a clamp is provided at the second end;

[0006] A connecting rod, the first end of which is fixedly connected to the testing equipment;

[0007] A positioning pin, the first end of which is fixedly connected to the second end of the connecting rod, and the second end is movably installed into the keyway;

[0008] A spring is provided between the pressure rod and the connecting rod, and the spring is fitted on the outside of the positioning pin, so that there is a variable elastic preload between the pressure rod and the connecting rod;

[0009] The positioning pin includes a pin rod located along the axial direction of the pressure rod and a limiting pin vertically fixed to the outer wall of the second end of the pin rod. The limiting pin can move in the keyway along the axial direction of the pressure rod and can move along the axis toward the pressure rod or connecting rod to adjust the preload between the spring and the pressure rod.

[0010] Preferably, the side surface of the keyway is provided with screw holes for mounting bolts in the circumferential direction, and a detachable key block is installed in the keyway near the connecting rod, and the key block is fixed to the keyway by bolts.

[0011] Preferably, the length of the key block is less than half the length of the keyway.

[0012] Preferably, a limiting groove is provided on the side of the key block that is in contact with the limiting pin, so that the limiting pin is engaged and installed in the limiting groove.

[0013] Preferably, the first end of the limiting pin is fixedly connected to the connecting rod.

[0014] Preferably, the first end of the limiting pin is screwed onto the connecting rod and is used to adjust the preload between the spring and the pressure rod.

[0015] Preferably, a screw is fixedly provided at the first end of the pin, and the pin and the connecting rod are screwed together by the screw.

[0016] Preferably, the connecting rod is configured as a hollow structure, and a positioning plate is fixedly installed inside the connecting rod on the side near the positioning pin. The screw passes through the positioning plate and is fixedly connected to the positioning plate by a nut.

[0017] Preferably, the pressure rod is configured as a hollow structure, allowing the pin to move along the axial direction inside the pressure rod.

[0018] Preferably, the compression stroke of the spring is greater than the length of the keyway.

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] This invention utilizes a pressure rod device composed of a pressure rod, a connecting rod, a positioning pin, and a spring. The device has a simple structure, low cost, and is easy to disassemble and maintain. The spring provides elastic cushioning between the pressure rod and the connecting rod, increasing the device's service life and enhancing the stability of the testing equipment. Furthermore, the positioning pin can be used to change the distance between the pressure rod and the connecting rod, thereby altering the preload between the spring and the pressure rod to accommodate steel cords with varying tensions. This eliminates the need for frequent disassembly and reduces maintenance costs. Attached Figure Description

[0021] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a front view structural schematic diagram of the clamping rod device for steel cord testing shown in an embodiment of the present invention;

[0023] Figure 2This is a side view of the clamping rod device for steel cord testing shown in an embodiment of the present invention.

[0024] Figure 3a This is a partially enlarged structural schematic diagram of an embodiment of the key block mounting device for the clamping rod device for steel cord testing shown in this invention.

[0025] Figure 3b yes Figure 3a A schematic diagram of the structure after installing the first length of key block;

[0026] Figure 3c yes Figure 3a A schematic diagram of the structure after installing the second-length key block;

[0027] Figure 4a This is a partially enlarged structural schematic diagram of an embodiment of the pin length adjustment in the clamping rod device for steel cord testing shown in this invention.

[0028] Figure 4b yes Figure 4a A schematic diagram of the pre-compression state of the clamping rod device when the pin is at the first length;

[0029] Figure 4c yes Figure 4a A schematic diagram of the pre-compression state of the pin in the clamping rod device when the pin is at the second length. Detailed Implementation

[0030] To better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0031] The current pressure bar device uses a fixed length bar, which needs to be replaced with different length bars depending on the tension of the steel cord. This increases the amount of pressure bar maintenance and replacement, as well as the workload and maintenance costs for maintenance personnel. The fixed length bar is also relatively easy to be damaged because there is no buffer structure for the tension of the steel cord, resulting in a short lifespan for the pressure bar.

[0032] Combination Figure 1 and Figure 2 As shown, the present invention proposes a clamping rod device for steel cord testing, including a clamping rod 1, a connecting rod 3 and a positioning pin 2.

[0033] The pressure rod 1 has a keyway 101 at its first end and a mounting groove 102 at its second end for mounting a fixture. In use, the fixture is installed in the mounting groove 102 and contacts the steel cord. The first end of the connecting rod 3 is fixedly connected to the testing equipment. The first end of the positioning pin 2 is fixedly connected to the second end of the connecting rod 3, and the second end is movably installed in the keyway 101, so that the positioning pin 2 can have a certain axial movement space in the keyway 101.

[0034] In order to provide a certain elastic buffer between the pressure rod 1 and the connecting rod 3 and reduce the damage caused by rigid impact, a spring 4 is provided between the pressure rod 1 and the connecting rod 3. The spring 4 is fitted on the outside of the positioning pin 2, so that the pressure rod 1 and the connecting rod 3 have a variable elastic preload.

[0035] Furthermore, the positioning pin 2 includes a pin 21 located along the axial direction of the pressure rod 1 and a limiting pin 22 vertically fixed to the outer wall of the second end of the pin 21. The limiting pin 22 is configured as a symmetrical circular cylinder protruding from the surface of the pin 21, and the limiting pin 22 can move in the keyway 101 along the axial direction of the pressure rod 1.

[0036] In a specific embodiment, the limiting pin 22 can be moved toward the pressure rod 1 or the connecting rod 3 according to the tension requirements of the steel cord, so as to adjust the compression of the spring 4 between the pressure rod 1 and the connecting rod 3, thereby changing the elastic preload between the spring 4 and the pressure rod 1 to adapt to the tension requirements of different steel cords.

[0037] In this way, when the steel cord model is changed, the preload between spring 4 and pressure rod 1 can be adjusted according to the tension requirements of the steel cord. This allows for adaptation to the needs of different steel cord models without requiring a complete replacement of the pressure rod device, reducing the workload of replacement. At the same time, the pressure rod device also has a certain degree of elastic buffering, which can avoid damage caused by rigid impact and reduce maintenance and replacement costs.

[0038] In an optional embodiment, the elastic preload of the spring 4 can be adjusted by either the length of the locating pin 2 extending into the pressure rod 1 (method 1) or the distance of the locating pin 2 extending into the connecting rod 3 (method 2).

[0039] Spring elastic preload adjustment method 1

[0040] Taking method 1 as an example, the preload of spring 4 is increased by further extending the positioning pin 2 into the pressure rod 1. Specifically, since the positioning pin 2 protrudes from the outer wall of the pressure rod 1, the positioning pin 2 is pinched and moved towards the pressure rod 1, pressing the positioning pin 2 into the pressure rod 1 a certain distance, so that spring 4 is compressed. At this time, the preload of spring 4 increases.

[0041] Combination Figures 3a-3c As shown, in order to ensure that the compressed spring 4 is at the predetermined compression level, the position of the locating pin 2 needs to be positioned.

[0042] Optionally, a detachable key block 5 is installed in the keyway 101 near the connecting rod 3. The key block 5 is fixed to the keyway 101 by bolts. When the key block 5 is in the keyway 101, its left side abuts against the end face of the limiting pin 22, and its right side abuts against the inner wall of the keyway 101, so that the limiting pin 22 will not move to the right due to the elastic force of the spring 4.

[0043] Specifically, when it is necessary to adjust the preload between the spring 4 and the pressure rod 1, a key block 5 can be installed in the keyway 101. The side surface of the keyway 101 is provided with screw holes 103 for installing bolts along the circumferential direction. The key block 5 is set as an arc-shaped piece, with protruding arc strips with screw holes at both the upper and lower ends. The arc strips cover the screw holes 103, and the holes correspond to each other.

[0044] Thus, according to the required pre-compression of spring 4, a key block 5 of appropriate length is selected, and the positioning pin 2 is pressed to move the pressure rod 1 to compress spring 4, so that the limiting pin 22 is in the left limiting position in keyway 101. Then, the key block 5 is installed in the right end of keyway 101 and fixed in the screw hole 103 on the side of keyway 101 with screws. Then, the pressing pressure is released, so that the pressure rod 1 naturally rebounds under the action of spring 4. At this time, due to the limiting effect of key block 5, the pre-compression of spring 4 increases after rebound.

[0045] Furthermore, depending on the type of steel cord, the required preload of spring 4 varies. By replacing key blocks 5 with different lengths, the preload between spring 4 and pressure rod 1 can be changed to accommodate steel cords with different tensions.

[0046] Specifically, such as Figure 3a As shown, pin 2 is in the initial position, at which point the preload of spring 4 is relatively small, suitable for steel cords with small diameters; as Figure 3b As shown, this is the relative position of the positioning pin 2 and the pressure rod 1 after the key block of the first length is installed in the keyway 101. At this time, the preload of the spring 4 is relatively... Figure 3a The position is relatively large, suitable for steel cords with a slightly larger diameter; such as Figure 3c As shown, this is the relative position of the positioning pin 2 and the pressure rod 1 after the second-length key block is installed in the keyway 101. At this time, the preload of the spring 4 is relatively... Figure 3b It has a larger position and is suitable for steel cords with larger diameters.

[0047] Therefore, combined Figures 3a-3c As shown, by gradually adjusting the length of the key block 5, the distance that the position pin 2 extends into the pressure rod 1 gradually increases. At this time, the preload of the spring 4 is greater, which gradually makes it suitable for steel cords with larger diameters.

[0048] In this embodiment of the adjustment method, the length of the key block 5 is less than half the length of the key groove 101, and a limit groove is provided on the side of the key block 5 that is in contact with the limit pin 22, so that the limit pin 22 is engaged and installed in the limit groove.

[0049] Furthermore, the first end of the limiting pin 22 is fixedly connected to the connecting rod 3, which can ensure that the spring 4 is in a stable state between the pressure rod 1 and the connecting rod 3.

[0050] Spring elastic preload adjustment method 2

[0051] Taking method 2 as an example, the preload of spring 4 is increased by further extending the positioning pin 2 into the connecting rod 3. Specifically, the first end of the positioning pin 2 is screwed onto the connecting rod 3 and used to adjust the preload between spring 4 and pressure rod 1.

[0052] Combination Figures 4a-4c As shown, a screw 23 is fixedly provided at the first end of the pin 21, and the pin 21 and the connecting rod 3 are screwed together by the screw 23.

[0053] The connecting rod 3 is designed as a hollow structure. Inside the connecting rod 3, near the locating pin 2, a locating plate 31 is fixedly installed. The screw 23 passes through the locating plate 31 and is fixedly connected to the locating plate 31 by a nut 32. Thus, by adjusting the position of the nut 32 on the screw 23 with a wrench, the locating pin 2 is moved a certain distance towards the connecting rod 3, causing the spring 4 to be compressed. At this time, the preload of the spring 4 increases.

[0054] In a specific embodiment, the nuts 32 are set in two sets. The screw 23 passes through the end of the positioning plate 31 and is screwed to the nuts 32. The position of the nuts 32 on the screw 23 is adjusted by using a wrench to adjust the compression of the spring 4 between the pressure rod 1 and the connecting rod 3. After the nuts 32 are screwed to a suitable depth, the preload of the spring 4 is determined to be within the set range, thereby achieving the effect of adjusting the preload of the spring 4.

[0055] As shown in the diagram, nuts 32 are installed on screw 23, and two sets of nuts 32 abut against each other. The arrangement of two sets of nuts 32 can play a role in preventing loosening.

[0056] Specifically, such as Figure 4a As shown, this is the initial position of pin 2 and connecting rod 3. At this time, the preload of spring 4 is relatively small, which is suitable for steel cords with small diameters; as Figure 4b As shown, pin 2 and connecting rod 3 are inserted to the first length position, at which point the preload of spring 4 is relatively... Figure 4a The location is relatively large, suitable for steel cords with a slightly larger diameter; such as Figure 4c As shown, pin 2 and connecting rod 3 are inserted to the second length position, at which point the preload of spring 4 is relatively... Figure 4b It has a larger footprint and is suitable for steel cords with larger diameters.

[0057] Therefore, combined Figures 4a-4c As shown, by gradually adjusting the position of the nut 32 on the screw 23, the distance that the screw 23 extends into the connecting rod 3 gradually increases. At this time, the preload of the spring 4 is greater, which gradually makes it suitable for steel cords with larger diameters.

[0058] In an optional embodiment, the pressure rod 1 is configured as a hollow structure, allowing the pin 21 to move along the axial direction inside the pressure rod 1. This allows the pressure rod 1 to have a certain amount of room to move when subjected to the tension impact of the steel cord, and it is subjected to the reaction force of the spring 4 during movement, which plays an elastic buffering role and extends the overall life of the pressure rod device.

[0059] In this adjustment method, the compression stroke of spring 4 is designed to be greater than the length of keyway 101, so that after the pressure rod 1 is impacted to the limit position by the tension of steel cord, spring 4 still has a certain amount of compression, so that spring 4 can fully buffer the pressure rod 1.

[0060] In conjunction with the above embodiments, the pressure rod device, consisting of a pressure rod 1, a connecting rod 3, a positioning pin 2, and a spring 4, has a simple structure, low cost, and is easy to disassemble and maintain. The spring 4 provides an elastic buffer between the pressure rod 1 and the connecting rod 3, increasing the device's service life and enhancing the stability of the testing equipment. Furthermore, the positioning pin 2 can be used to change the distance between the pressure rod 1 and the connecting rod 3, thereby changing the preload between the spring 4 and the pressure rod 1 to accommodate steel cords with different tensions. This eliminates the need for frequent disassembly and reduces maintenance costs.

[0061] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A clamping rod device for testing steel cord, characterized in that, include: The pressure rod (1) has a keyway (101) at its first end and a mounting groove (102) for mounting a clamp at its second end. Link (3), the first end of which is fixedly connected to the detection equipment; Positioning pin (2), the first end of which is fixedly connected to the second end of the connecting rod (3), and the second end is movably installed in the keyway (101); Among them, a spring (4) is provided between the pressure rod (1) and the connecting rod (3). The spring (4) is fitted on the outside of the positioning pin (2) so that there is a variable elastic preload between the pressure rod (1) and the connecting rod (3). The positioning pin (2) includes a pin (21) located along the axial direction of the pressure rod (1) and a limiting pin (22) vertically fixed to the outer wall of the second end of the pin (21). The limiting pin (22) can move in the keyway (101) along the axial direction of the pressure rod (1). The limiting pin (22) can move along the axis toward the pressure rod (1) or the connecting rod (3) to adjust the preload between the spring (4) and the pressure rod (1). The keyway (101) has a screw hole (103) for mounting bolts along its circumferential direction on its side surface. A detachable key block (5) is installed in the keyway (101) near the connecting rod (3). The key block (5) is fixed to the keyway (101) by bolts. Depending on the type of steel cord, the required preload of the spring (4) is different. The key block (5) of different lengths is replaced to adjust the preload between the spring (4) and the pressure rod (1) to adapt to steel cords with different tensions. The length of the key block (5) is less than half the length of the keyway (101).

2. The clamping rod device for steel cord testing according to claim 1, characterized in that, A limiting groove is provided on the side of the key block (5) that is in contact with the limiting pin (22), so that the limiting pin (22) is engaged and installed in the limiting groove.

3. The clamping rod device for steel cord testing according to claim 2, characterized in that, The first end of the limiting pin (22) is fixedly connected to the connecting rod (3).

4. The clamping rod device for steel cord testing according to claim 1, characterized in that, The first end of the limiting pin (22) is screwed onto the connecting rod (3) and is used to adjust the preload between the spring (4) and the pressure rod (1).

5. The clamping rod device for steel cord testing according to claim 4, characterized in that, The first end of the pin (21) is fixedly provided with a screw (23), and the pin (21) and the connecting rod (3) are screwed together by the screw (23).

6. The clamping rod device for steel cord testing according to claim 5, characterized in that, The connecting rod (3) is configured as a hollow structure. A positioning plate (31) is fixedly installed inside the connecting rod (3) on the side near the positioning pin (2). The screw (23) passes through the positioning plate (31) and is fixedly connected to the positioning plate (31) by a nut (32).

7. The clamping rod device for steel cord testing according to claim 1, characterized in that, The pressure rod (1) is configured as a hollow structure, so that the pin (21) can move along the axial direction inside the pressure rod (1).

8. The clamping rod device for steel cord testing according to claim 1, characterized in that, The compression stroke of the spring (4) is greater than the length of the keyway (101).

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