Clamping device for milling surface of voltage transformer

Abstract

The utility model discloses a clamping device for surface milling of a voltage transformer, which belongs to the technical field of voltage transformers and comprises a mounting panel, a plurality of groups of clamping components and adjusting components, and a U-shaped hole and / or a round hole for fixing a primary terminal of the voltage transformer is arranged on the mounting panel; each group of clamping assembly comprises a fixed plate and a movable plate which are used for clamping the two sides of the voltage transformer; the adjusting assembly comprises pressure bearings arranged on the two sides of the moving plate, a positioning plate fixedly mounted on the upper surface of the mounting panel and a screw driving the moving plate to move left and right. A threaded hole is formed in the positioning plate; a crank is arranged at the right end of the screw rod; the left end of the screw penetrates through the threaded hole and then is connected with the two pressure bearings. A plurality of guide rods are arranged between the movable plate and the positioning plate; through the arrangement of the clamping device, the technical problems that a traditional clamp is fixed and single in shape, and clamping during face milling of various types of voltage transformers is difficult to meet are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of voltage transformers, and in particular relates to a clamping device for the milling surface of a voltage transformer. Background Art

[0002] As we all know, a potential transformer (PT) is similar to a voltage transformer (VT) and is an instrument used to transform voltage. The purpose of voltage transformers is primarily to power measuring instruments and relay protection devices, measure line voltage, power, and energy, or protect valuable equipment, motors, and transformers in the event of a line fault. Therefore, voltage transformer capacities range from volt-amperes to kilovolt-amperes. Milling is a commonly used precision machining method in voltage transformer production, and the accuracy of milling plays a decisive role in the performance and quality of the resulting voltage transformer.

[0003] At present, in the traditional process of milling the voltage transformer, a fixture is needed to fix the transformers of different shapes before milling. The clamps of the traditional fixture cannot be replaced, and each type of transformer needs to be equipped with a corresponding fixture for fixation.

[0004] During the work, it was found that the traditional technology has the following main defects:

[0005] Traditional clamping devices are only suitable for a single type of voltage transformer. When the type of voltage transformer changes, the clamping device needs to be redesigned. That is, the universality of traditional clamping devices is poor. If an inappropriate clamping device is used, it will cause safety hazards to the product quality of the voltage transformer. Therefore, it is of great significance to design and develop a clamping device that can be used for milling surfaces of multiple types of voltage transformers. Utility Model Content

[0006] The purpose of the utility model is to provide a clamping device for voltage transformer milling surface, so as to solve the technical problem in the above background technology that the traditional clamp has a single fixed shape and is difficult to meet the clamping requirements when milling the surfaces of various types of voltage transformers.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A clamping device for milling a voltage transformer surface comprises a mounting panel, a plurality of clamping assemblies and an adjusting assembly, wherein:

[0009] The mounting panel is provided with a U-shaped hole and / or a round hole for fixing the primary terminal of the voltage transformer, which is used to provide a preliminary limit for the voltage transformer to be milled;

[0010] Each set of clamping assemblies includes a fixed plate and a movable plate for clamping both sides of the voltage transformer. The fixed plate is fixedly mounted on the left side of the upper surface of the mounting panel, and the movable plate is located on the right side of the upper surface of the mounting panel. The movable plate can slide left and right along the mounting panel to achieve a tight clamping of the voltage transformer to be milled.

[0011] The adjusting assembly includes pressure bearings arranged on both sides of the movable plate, a positioning plate fixedly mounted on the upper surface of the mounting panel, and a screw that drives the movable plate to move left and right; the positioning plate is located on the right side of the movable plate; a threaded hole for connecting the screw is opened on the positioning plate; a crank is provided at the right end of the screw for providing a means of manual control, making adjustment more convenient and accurate; the left end of the screw passes through the threaded hole and is connected to two pressure bearings for providing stable support when the screw rotates, reducing friction between the screw and the movable plate, and further ensuring accuracy when adjusting the position of the movable plate;

[0012] The U-shaped hole and / or circular hole is located on the mounting panel between the fixed plate and the movable plate; a plurality of guide rods are provided between the movable plate and the positioning plate to ensure that the movable plate can stably perform linear motion when adjusting its position.

[0013] Preferably, the U-shaped hole is located on the side wall of the mounting panel, and the circular hole passes through the mounting panel from top to bottom, providing an additional fixing point for the voltage transformer to be milled, which is more conducive to stably fixing the voltage transformer.

[0014] Preferably, the connection relationship between the fixing plate and the mounting panel is: bolt connection, industrial adhesive bonding, or slot connection, and fixing plates of different shapes can be replaced according to the shape of the voltage transformer to be milled.

[0015] Preferably, the contact surface between the clamping assembly and the voltage transformer is configured as an arc surface matching the shape of the voltage transformer, so as to match different shapes of voltage transformers.

[0016] Preferably, the contact surface between the clamping assembly and the voltage transformer is provided with a plurality of long grooves, which can provide more contact surfaces, increase the friction between the clamping assembly and the voltage transformer, and help to clamp the voltage transformer more firmly to prevent movement and shaking.

[0017] Preferably, the length of the guide rod is greater than or equal to the maximum distance between the positioning plate and the movable plate, so as to ensure that the movable plate does not deviate from the clamping direction during movement.

[0018] Preferably, the connection relationship between the positioning plate and the mounting panel is: welding or bolt connection or industrial adhesive connection or slot connection, which is used to improve the firmness and stability of the positioning plate and ensure that the relative position of the positioning plate and the mounting panel is not easily changed.

[0019] Preferably, the positioning plate and the mounting panel are an integrally formed structure, which helps to simplify the manufacturing process, improve assembly efficiency, and ensure the strength and stability of the positioning plate.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The utility model solves the problem that traditional clamping devices are only for a single model of voltage transformer, and when the model of the voltage transformer is changed, the clamping device needs to be redesigned, that is, the universality of the traditional clamping device is poor. If an inappropriate clamping device is used, it will cause safety hazards to the product quality of the voltage transformer; a mounting panel with U-shaped holes and / or circular holes is provided to provide preliminary limit for the voltage transformer to be milled; different flexibly replaceable clamping components are provided, including a fixed plate and a movable plate, to achieve tight clamping of the voltage transformer to be milled; a manually adjustable adjustment component is provided to achieve precise adjustment of the position of the movable plate, so as to achieve more stable clamping of the voltage transformer to be milled. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a preferred embodiment of the utility model;

[0023] Figure 2 This is a schematic structural diagram of a clamping assembly with an elongated groove in another preferred embodiment of the present invention.

[0024] In the figure: 1. Fixed plate; 2. Movable plate; 3. Positioning plate; 4. Mounting panel; 5. Guide rod; 6. Screw; 7. Crank handle; 8. U-shaped hole; 9. Round hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. A person skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] like Figure 1-Figure 2 As shown:

[0030] First embodiment: A clamping device for milling a voltage transformer, comprising a mounting panel 4, and several sets of clamping components and adjustment components designed for different types of voltage transformers, wherein:

[0031] In order to provide preliminary limiting for the voltage transformer to be milled, U-shaped holes 8 and / or round holes 9 for fixing the primary terminals of the voltage transformer are provided on the mounting panel 4, and the primary terminals of the voltage transformer are fixed to the mounting panel 4 by bolts.

[0032] Each set of clamping assemblies includes a fixed plate 1 and a movable plate 2 for clamping both sides of the voltage transformer. The fixed plate 1 is fixedly mounted on the left side of the upper surface of the mounting panel 4, and the movable plate 2 is located on the right side of the upper surface of the mounting panel 4. The movable plate 2 can slide left and right along the upper surface of the mounting panel 4 to achieve a tight clamping of the voltage transformer to be milled.

[0033] The adjusting assembly includes pressure bearings arranged on both sides of the movable plate 2, a positioning plate 3 fixedly mounted on the upper surface of the mounting panel 4, and a screw 6 that drives the movable plate 2 to move left and right; the positioning plate 3 is located on the right side of the movable plate 2; a threaded hole for connecting the screw 6 is opened on the positioning plate 3; in order to more accurately control the left and right movement of the movable plate 2, the right end of the screw 6 is provided with a crank handle 7, by manually turning the crank handle 7, driving the screw 6 to rotate through the threaded hole on the positioning plate 3, realizing the left and right movement of the screw 6, thereby making the movable plate 2 move left and right; in order to realize the rotation connection of the screw 6 and the movable plate 2, the left end of the screw 6 is connected with the two pressure bearings located on both sides of the movable plate 2 after passing through the threaded hole. The pressure bearings provide stable support for the screw 6 when rotating, reduce the friction between the screw 6 and the movable plate 2, and further ensure the accuracy when adjusting the position of the movable plate 2;

[0034] The U-shaped hole 8 and / or the circular hole 9 are located on the mounting panel 4 between the fixed plate 1 and the movable plate 2; in order to ensure that the movable plate 2 can stably perform linear motion when adjusting its position, a number of guide rods 5 are arranged between the movable plate 2 and the positioning plate 3. The guide rods 5 pass through the holes on the positioning plate 3 and the movable plate 2. During the left and right movement of the movable plate 2, the guide rods 5 limit the movable plate 2 to only move along the linear direction where the guide rods 5 are located.

[0035] Second embodiment: Based on the above-mentioned first embodiment, the U-shaped hole 8 is located on the side wall of the mounting panel 4, and the circular hole 9 passes through the mounting panel 4 from top to bottom, providing an additional fixing point for the voltage transformer to be milled, which is more conducive to stably fixing the voltage transformer.

[0036] Third embodiment: On the basis of the above-mentioned first embodiment, in order to improve the universality of the clamping device, the fixing plate 1 is replaceable, and the connection relationship between the fixing plate 1 and the mounting panel 4 is: bolt connection or industrial adhesive connection or slot connection, and the fixing plate 1 of different shapes can be replaced according to the shape of the voltage transformer to be milled.

[0037] Fourth embodiment: Based on the first embodiment, in order to enable the clamping assembly to adapt to different voltage transformer shapes, the contact surface between the clamping assembly and the voltage transformer is set to a curved surface that matches the shape of the voltage transformer.

[0038] Fifth embodiment: Based on the first embodiment, in order to clamp the voltage transformer more firmly, a plurality of long grooves are provided on the contact surface between the clamping assembly and the voltage transformer, which can provide more contact surfaces and increase the friction between the clamping assembly and the voltage transformer.

[0039] Sixth embodiment: Based on the above-mentioned first embodiment, in order to ensure that the guide rod 5 and the positioning plate 3 always remain connected during the clamping process and limit the moving direction of the movable plate 2, the length of the guide rod 5 is greater than or equal to the maximum distance between the positioning plate 3 and the movable plate 2.

[0040] Seventh embodiment: On the basis of the above-mentioned first embodiment, in order to improve the firmness and stability of the positioning plate 3 and ensure that the relative position of the positioning plate 3 and the mounting panel 4 is not easily changed, the connection relationship between the positioning plate 3 and the mounting panel 4 is: welding or bolt connection or industrial glue or slot connection.

[0041] Eighth embodiment: Based on the first embodiment, in order to simplify the manufacturing process, improve the efficiency of assembly, and ensure the strength and stability of the positioning plate 3, the positioning plate 3 and the mounting panel 4 are an integrally formed structure.

[0042] In the present invention, in order to solve the problems of traditional fixtures being fixed in shape, the use of fixtures with mismatched shapes may produce large errors, thereby affecting the quality and qualified rate of the product; or the need to equip multiple different fixtures to adapt to different production needs, which is costly, a clamping device for milling a voltage transformer is provided, including a mounting panel 4, on which a U-shaped hole 8 and / or a circular hole 9 for fixing the primary terminal of the voltage transformer is provided, which is used to provide a preliminary limit for the voltage transformer to be milled.

[0043] The clamping assembly is relatively arranged on the mounting panel 4, and the clamping assembly includes a fixed plate 1 and a movable plate 2 for clamping both sides of the voltage transformer. The fixed plate 1 is fixedly mounted on the left side of the upper surface of the mounting panel 4, and the movable plate 2 is located on the right side of the upper surface of the mounting panel 4. The movable plate 2 can slide left and right along the mounting panel 4 to achieve tight clamping of the voltage transformer to be milled; the movable plate 2 is connected to the adjustment assembly, and the adjustment assembly includes pressure bearings arranged on both sides of the movable plate 2, a positioning plate 3 fixedly mounted on the upper surface of the mounting panel 4, and a screw 6 that drives the movable plate 2 to move left and right; a number of guide rods 5 are arranged between the movable plate 2 and the positioning plate 3 to ensure that the movable plate 2 can stably perform linear motion when adjusting its position.

[0044] Working principle:

[0045] Step 1. For the specific model of the voltage transformer, select a clamping assembly that matches the shape of the voltage transformer of that model: The utility model is provided with clamping assemblies that meet the requirements of different types of voltage transformers. Each set of clamping assemblies and the installation panel 4 are connected in a detachable manner. Before the milling work begins, the operator can select a clamping assembly that matches the voltage transformer according to the shape of the voltage transformer for installation; after installation, adjust the distance between the fixed plate 1 and the movable plate 2 so that the distance between the two can facilitate the placement of the voltage transformer, and then proceed to the next step;

[0046] Step 2: Adjust the placement angle of the voltage transformer according to the position of the U-shaped hole 8 and / or the circular hole 9 so that the left side of the voltage transformer is in close contact with the fixing plate 1. The primary terminal of the voltage transformer is fixed in the U-shaped hole 8 or the circular hole 9 on the mounting panel 4 with bolts. After fixing, proceed to the next step;

[0047] Step 3: Operate the adjustment assembly to precisely control the movable plate 2 to achieve tight clamping of the voltage transformer: The adjustment assembly in the present invention includes a pressure bearing, a positioning plate 3, and a screw 6; the positioning plate 3 is fixed to the upper surface of the mounting panel 4, the pressure bearings are arranged on both sides of the movable plate 2, and the screw 6 is connected to the pressure bearing on the movable plate 2 through the threaded holes on the positioning plate 3; the operator manually rotates the crank 7 to drive the screw 6 to move left and right, thereby adjusting the position of the movable plate 2 to achieve tight clamping of the voltage transformer; after achieving tight clamping, the milling work is performed;

[0048] Step 4: After the milling work is completed, the operator turns the crank 7 to control the movable plate 2 to loosen the clamping, removes the bolts fixing the primary terminal, takes out the voltage transformer, and the operation is completed.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A clamping device for milling a voltage transformer, characterized in that: It comprises a mounting panel (4), a plurality of clamping components and an adjusting component, wherein: A U-shaped hole (8) and / or a circular hole (9) for fixing a primary terminal of a voltage transformer is provided on the installation panel (4); the primary terminal of the voltage transformer is fixed in the U-shaped hole (8) or the circular hole (9) by means of bolts; the U-shaped hole is located on a side wall of the installation panel (4), and the circular hole (9) passes through the installation panel (4) from top to bottom; Each set of clamping assemblies comprises a fixed plate (1) and a movable plate (2) for clamping two sides of the voltage transformer, wherein the fixed plate (1) is fixedly mounted on the left side of the upper surface of the installation panel (4), and the movable plate (2) is located on the right side of the upper surface of the installation panel (4); The adjustment assembly comprises pressure bearings arranged on both sides of the movable plate (2), a positioning plate (3) fixedly mounted on the upper surface of the mounting panel (4), and a screw (6) for driving the movable plate (2) to move left and right; the positioning plate (3) is located on the right side of the movable plate (2); a threaded hole for connecting the screw (6) is provided on the positioning plate (3); a crank (7) is provided at the right end of the screw (6); the left end of the screw (6) passes through the threaded hole and is connected to the two pressure bearings; The U-shaped hole and / or the circular hole (9) are located on the mounting panel (4) between the fixed plate (1) and the movable plate (2); a plurality of guide rods (5) are provided between the movable plate (2) and the positioning plate (3); The contact surface between the clamping assembly and the voltage transformer is configured as an arc surface matching the shape of the voltage transformer; Or a plurality of long grooves are provided on the contact surface between the clamping assembly and the voltage transformer.

2. The clamping device for milling the voltage transformer according to claim 1, characterized in that: The connection relationship between the fixing plate (1) and the installation panel (4) is: bolt connection or slot connection.

3. The clamping device for milling the voltage transformer according to claim 1, characterized in that: The length of the guide rod (5) is greater than or equal to the maximum distance between the positioning plate (3) and the movable plate (2).

4. The clamping device for milling the voltage transformer according to claim 1, characterized in that: The connection relationship between the positioning plate (3) and the installation panel (4) is: welding, bolt connection, industrial adhesive bonding, or slot connection.

5. The clamping device for milling the voltage transformer according to claim 1, characterized in that: The positioning plate (3) and the installation panel (4) are an integrally formed structure.

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