A connecting mechanism between a hydraulic press and a displacement feedback device

Abstract

The invention discloses a connection mechanism between a hydraulic press and a displacement feedback device, which comprises a hydraulic press, a power swing arm, a connection device and a displacement feedback device. The hydraulic press is provided with a hydraulic press push rod, and the hydraulic press push rod is connected with the power swing arm through an adjusting member. The hydraulic press push rod is connected with the displacement feedback device through the connection device. The connection device comprises: a clamp, a first rotating plate, a second rotating plate, a connecting member, a connecting flange, an extension member and a guide rail. The clamp comprises two groups, and the clamp is fixed on the adjusting member. The first rotating plate is arranged between the two groups of clamps, and the first rotating plate is rotatably connected with the adjusting member. The first rotating plate, the second rotating plate and the connecting member are rotatably connected. The second rotating plate is rotatably connected with the guide rail. The connecting member is fixedly connected with the connecting flange, and the connecting flange is connected with the extension member. The extension member is fixedly connected with the iron core rod of the displacement feedback device, realizing the flexible connection between the position feedback device and the hydraulic press push rod, and avoiding the damage caused by the friction between the iron core rod and the coil cylinder.

Description

Technical Field

[0001] The present invention mainly relates to a connecting device for power plant equipment, and particularly relates to a connecting mechanism between a hydraulic press and a displacement feedback device. Background Art

[0002] The principle of the existing throttle valve action is mainly that the output shaft of the oil motor of the low-pressure regulating valve of the steam pump small turbine is installed and connected eccentrically with the valve core of the valve, but instead, a stretching action is carried out through a lever to open and close the throttle valve. Since the base of the displacement feedback device LVDT is fixed, and its iron core rod is connected to the output shaft of the oil motor, the original design is a linear stroke action, but there is a certain inclination during the stretching action of the throttle valve, resulting in the deviation of the LVDT iron core rod following the stretching action of the throttle valve, and friction occurs between the LVDT iron core rod and the LVDT coil cylinder, ultimately leading to wear of the LVDT iron core rod. Summary of the Invention

[0003] The present invention discloses a connecting mechanism between a hydraulic press and a displacement feedback device, aiming to solve the problem that the existing connection method will cause friction between the iron core rod and the coil cylinder, ultimately leading to wear of the iron core rod.

[0004] In order to achieve the expected purpose, the technical solution adopted by the present utility model is as follows:

[0005] A connecting mechanism between a hydraulic press and a displacement feedback device, comprising a hydraulic press, a power swing arm, a connecting device, and a displacement feedback device. The hydraulic press is provided with a hydraulic press push rod, the hydraulic press push rod is connected to the power swing arm through an adjusting member, and the hydraulic press push rod is connected to the displacement feedback device through a connecting device. The characteristic lies in that: the connecting device includes: a clamp, a first rotating plate, a second rotating plate, a connecting member, a connecting flange, an extension member, and a guide rail. There are two groups of the clamps, the clamps are fixed on the adjusting member, the first rotating plate is arranged between the two groups of clamps, the first rotating plate is rotationally connected to the adjusting member, the first rotating plate, the second rotating plate, and the connecting member are rotationally connected, the second rotating plate is rotationally connected to the guide rail, the connecting member is fixedly connected to the connecting flange, the connecting flange is connected to the extension member, and the extension member is fixedly connected to the iron core rod of the displacement feedback device.

[0006] Further, the position of the first rotating plate is fixed by the two groups of clamps, and the first rotating plate is rotationally connected to the adjusting member, so that a rotating pair is formed between the first rotating plate and the clamps.

[0007] Further, the first rotating plate, the second rotating plate, and the connecting member are rotationally connected by bolts. One end of the second rotating plate is rotationally connected to the first rotating plate and the connecting member, and the other end of the second rotating plate is rotationally connected to the guide rail. The guide rail is fixed on the support.

[0008] Furthermore, a sliding sleeve is provided on the guide rail, the sliding sleeve is fixedly connected to the second rotating plate, and the sliding sleeve is sleeved on the guide rail.

[0009] Furthermore, the connecting piece is fixedly connected to the connecting flange by bolts.

[0010] Preferably, a variable length gap is provided at the connection between the connecting flange and the connecting piece, the purpose of which is to provide an adjustment space for the connection between the connecting piece and the connecting flange. When the connection position does not correspond due to dimensional errors of the connecting piece, manufacturing errors of the connecting flange, or operational errors during manual installation, the connection position can be fine-tuned through the variable length gap.

[0011] Furthermore, the connecting flange is connected to the extension piece via an intermediate connecting hole. Specifically, a connecting hole is provided at the center of the connecting flange, and a matching through hole is provided at a corresponding position of the extension piece. The connecting hole and the through hole are matched and fixed with bolts. In actual use, since the connecting piece and the connecting flange are fixedly connected, the connecting flange can be rotated when the connecting piece and the extension piece are not perpendicular in the horizontal plane, so as to achieve accurate connection at various angles.

[0012] Furthermore, variable distance adjustment grooves are provided at the connection points between the two ends of the extension piece and the core rod of the displacement feedback device.

[0013] In the present technical solution, there is a rotating pair between the clamp and the first rotating plate, and there is an upper and lower limiting rotating / moving pair between the first rotating plate, the second rotating plate, and the connecting member. The second rotating plate and the sliding sleeve do not move with x, but only move with Y, and there is a moving pair between the sliding sleeve and the guide rail. When the adjusting member drives the clamp to swing, the first rotating plate rotates by φ41(x) and moves left and right by f(x), and the second rotating plate swings by φ42(x) and moves in the Y direction. The connecting member does not swing, and only the up and down movement of the adjusting member can be transmitted to the connecting member, and moves up and down with Y. In order to improve reliability, a guide rail is added, and a variable length gap is designed for the convenience of installation of the connecting member and the connecting flange. In order to solve the problem of non-vertical installation, a rotatable connection is designed between the connecting flange and the extension member.

[0014] Beneficial effects: The connection device of the present invention realizes the flexible connection of the hydraulic press push rod of the position feedback device, ensuring that the iron core rod of the position feedback device will not cause feedback shaking due to the swing of the power swing arm, and avoiding damage caused by friction between the iron core rod and the coil barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view after removing the power swing arm of the present invention.

[0016] Figure 2 The side view after adding the power swing arm of the present invention.

[0017] Figure 3 This is the top view of the present invention after removing the power swing arm.

[0018] Figure 4 This is the enlarged view of Area A.

[0019] Figure 5 This is the connection schematic diagram of the connecting piece, connecting flange, and extension piece.

[0020] Wherein: 1. Hydraulic press; 2. Hydraulic press push rod; 3. Adjusting piece; 40. Clamp; 41. First rotating plate; 42. Second rotating plate; 43. Connecting piece; 4301. Length variable gap; 44. Sliding sleeve; 45. Guide rail; 51. Connecting flange; 52. Extension piece; 5201. Variable distance adjustment slot; 6. Position feedback device; 61. Iron core rod; 7. Bolt; 8. Power swing arm. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the present invention, unless otherwise clearly defined and limited, the terms "set", "install", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Such as Figures 1 to 5As shown in the figure, a connecting mechanism between a hydraulic press and a displacement feedback device includes a hydraulic press 1, a power swing arm 8, a connecting device, and a displacement feedback device 6. In this embodiment, the specific displacement feedback device used is an LVDT. LVDT (Linear Variable Differential Transformer) is the abbreviation of Linear Variable Differential Transformer and belongs to a linear displacement sensor. The hydraulic press 1 is provided with a hydraulic press push rod 2. The hydraulic press push rod 2 is connected to the power swing arm 8 through an adjusting member 3. The hydraulic press push rod 2 is connected to the displacement feedback device (hereinafter referred to as LVDT) through a connecting device. The connecting device includes: a clamp 40, a first rotating plate 41, a second rotating plate 42, a connecting member 43, a connecting flange 51, an extension member 52, and a guide rail 45. There are two groups of the clamps 40. The clamps 40 are fixed on the adjusting member 3. The first rotating plate 41 is arranged between the two groups of clamps 40. The first rotating plate 41 is rotatably connected to the adjusting member 3. The first rotating plate 41 is fixed in position by the two groups of clamps 40. The first rotating plate 41 is rotatably connected to the adjusting member 3, so that a rotating pair is formed between the first rotating plate 41 and the clamp 40. The first rotating plate 41, the second rotating plate 42, and the connecting member 43 are rotatably connected. The second rotating plate 42 is rotatably connected to the guide rail 45. Specifically, the first rotating plate 41, the second rotating plate 42, and the connecting member 43 are rotatably connected by bolts. One end of the second rotating plate 42 is rotatably connected to the first rotating plate 41 and the connecting member 43, and the other end of the second rotating plate 42 is rotatably connected to the guide rail 45. The guide rail 45 is fixed on a support. A sliding sleeve 44 is arranged on the guide rail 45. The sliding sleeve 44 is fixedly connected to the first rotating plate 41. The sliding sleeve 44 is rotatably connected to the guide rail 45. The connecting member 43 is fixedly connected to the connecting flange 51. Specifically, the connecting member 43 is fixedly connected to the connecting flange 51 through a bolt 7. Preferably, a length-variable gap 4301 is arranged at the connection between the connecting flange 51 and the connecting member 43. The purpose is to provide an adjustment space at the connection between the connecting member 43 and the connecting flange 51. When the connection position is not corresponding due to the dimensional error of the connecting member 43, the manufacturing error of the connecting flange 51, or the operation error during manual installation, the connection position can be finely adjusted through the length-variable gap 4301. The connecting flange 51 is connected to the extension member 52. The connecting flange 51 is connected to the extension member 52 through an intermediate connection hole. Specifically, a connection hole is arranged at the center of the connecting flange 51, and a matching through hole is arranged at the corresponding position of the extension member 52. The two are connected through the cooperation of the connection hole and the through hole and fixed with a bolt 7. When actually in use, since the connecting member 43 and the connecting flange 51 are fixedly connected, when the connecting member 43 and the extension member 52 are not perpendicular in the horizontal plane, the connecting flange can be rotated to achieve accurate connection at various angles.The extension member 52 is fixedly connected to the iron core rod 61 of the displacement feedback device 6, and variable distance adjustment slots 5201 are provided at the joints between the two ends of the extension member 52 and the iron core rod 601 of the displacement feedback device 6.

[0024] Working principle: The hydraulic press 1 operates to drive the hydraulic press push rod 2 to reciprocate up and down. Due to the action of the power swing arm 8, the power swing arm 8 is connected to the hydraulic press push rod 2 through the adjusting member 3. Under the action of the power swing arm 8, the hydraulic press push rod 2 will undergo a slight swing. That is, at this time, the hydraulic press push rod 2 and the adjusting member 3 move up and down on the one hand and generate a lateral swing on the other hand. That is, the swing in the Figure 4 direction of X shown o occurs. When the swing occurs, the first rotating plate 41 undergoes a lateral swing and a vertical displacement. Since the first rotating plate 41, the second rotating plate 42, and the connecting member 43 are rotatably connected, and the other end of the second rotating plate 42 is rotatably connected to the guide rail 45, therefore, when the first rotating plate 41 drives the second rotating plate 42, the lateral swing of the first rotating plate 41 is absorbed by the second rotating plate 42, and only the vertical movement of the first rotating plate 41 is transmitted to the connecting member 43 through the second rotating plate 42. The connecting member 43 then transmits the vertical displacement to the connecting flange 51 and the extension member 52, and further the extension member 52 drives the iron core rod 601 to move up and down. In this way, it can ensure that the influence of the lateral displacement brought by the power swing arm 8 is eliminated, and it can avoid the damage of the iron core rod 601 caused by the friction between the iron core rod 601 and the coil cylinder due to the influence of the lateral displacement.

[0025] In summary, the present invention achieves the expected effect.

Claims

1. A connecting mechanism between a hydraulic press and a displacement feedback device, comprising a hydraulic press, a power swing arm, a connecting device, and two displacement feedback devices. The hydraulic press is provided with a hydraulic press push rod, the hydraulic press push rod is connected to the power swing arm through an adjusting member, and the hydraulic press push rod is connected to the displacement feedback device through the connecting device, characterized in that: The connection device includes: a clamp, a first rotating plate, a second rotating plate, a connecting piece, a connecting flange, an extension piece, and a guide rail. There are two groups of clamps, which are fixed on the adjusting piece. The first rotating plate is arranged between the two groups of clamps and is rotatably connected to the adjusting piece. The first rotating plate, the second rotating plate, and the connecting piece are rotatably connected. The second rotating plate is rotatably connected to the guide rail. The connecting piece is fixedly connected to the connecting flange. The fixed flange is connected to the extension piece. The extension piece is fixedly connected to the iron core rod of the displacement feedback device. The first rotating plate is fixed in position by the two groups of clamps and is rotatably connected to the adjusting piece. A rotating pair is formed between the first rotating plate and the clamp. The first rotating plate, the second rotating plate, and the connecting piece are rotatably connected by bolts. One end of the second rotating plate is rotatably connected to the first rotating plate and the connecting piece, and the other end of the second rotating plate is rotatably connected to the guide rail. The lateral swing of the first rotating plate will be absorbed by the second rotating plate, and only the up-and-down movement of the first rotating plate is transmitted to the connecting piece through the second rotating plate.

2. The connecting mechanism between a hydraulic press and a displacement feedback device according to claim 1, characterized in that, A sliding sleeve is arranged on the guide rail, and the sliding sleeve is fixedly connected to the second rotating plate and is connected to the guide rail.

3. The connecting mechanism between a hydraulic press and a displacement feedback device according to claim 1, characterized in that, A length-variable gap is arranged at the connection between the connecting flange and the connecting piece.

4. The connecting mechanism between a hydraulic press and a displacement feedback device according to claim 1, characterized in that Variable-distance adjustment grooves are arranged at both ends of the extension piece.

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