A compression tool for a transformer
The automated cover-closing and clamping fixture using a bench and clamping components solves the problems of low assembly efficiency and quality of plastic-cased instrument transformer housings, achieving efficient and trace-free tight cover-closing, thus improving assembly quality and appearance.
Patent Information
- Application Number
- CN202521904292.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-04
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-04
AI Technical Summary
In the existing technology, the closing and clamping operation of the plastic-shell current transformer housing is inefficient, and gaps and knock marks are easily produced, affecting the assembly quality and appearance quality.
The system adopts a combination structure of a frame, positioning components, and clamping components. The upper and lower shells are automatically closed and clamped by a drive unit and a pressure plate, avoiding manual knocking. The positioning groove and elastic pressure block ensure that the shells are tightly closed.
It improves assembly efficiency, avoids hammer marks, ensures a tight seal and good appearance of the casing, and meets the needs of mass production.
Smart Images
Figure CN224674745U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of current transformer production equipment, and in particular to a clamping fixture for current transformers. Background Technology
[0002] Molded case instrument transformers typically consist of an upper and a lower housing, which need to be closed and pressed together for assembly. In related technologies, the upper and lower housings are manually closed and pressed together using a rubber mallet. However, this manual assembly operation is time-consuming and inefficient, unsuitable for mass production. Furthermore, when the upper housing (or lower housing) is struck with the rubber mallet, the edge of the upper housing away from the striking area may warp, resulting in gaps between the upper and lower housings and causing loose assembly, affecting the assembly quality of the instrument transformer. In addition, after being struck with the rubber mallet, striking marks may appear on the striking surface of the upper housing, reducing the appearance quality of the instrument transformer housing. Utility Model Content
[0003] The purpose of this utility model is to provide a clamping fixture for a current transformer to improve the assembly efficiency, assembly quality and appearance quality of the current transformer housing.
[0004] To achieve this objective, the technical solution adopted by this utility model is as follows:
[0005] The clamping fixture for the current transformer includes:
[0006] A workbench, the workbench having a pressing station and a loading / unloading station;
[0007] The positioning component includes a first driving member and a positioning member. The positioning member is slidably disposed on the platform, and the top end of the positioning member is provided with a positioning groove adapted to the housing of the current transformer. The first driving member is drivenly connected to the positioning member to drive the positioning member to move between the pressing station and the loading / unloading station.
[0008] A clamping assembly, comprising a second driving member and a pressure plate, wherein the second driving member is disposed above the clamping station of the platform and is connected to the pressure plate in a driving manner to drive the pressure plate to descend along the height direction and clamp the current transformer housing that has moved into the positioning member of the clamping station.
[0009] As an optional solution, the positioning element includes:
[0010] A shape changer is provided, and the output end of the first driving component is connected to the shape changer.
[0011] A positioning plate is detachably mounted on the shape changer, and the top of the positioning plate is provided with the positioning groove.
[0012] As an optional solution, the frame is provided with a slide rail, one end of which extends at least to the pressing station along the length direction, and the other end of which extends at least to the loading and unloading station along the length direction; the changing seat is slidably disposed on the slide rail.
[0013] As an optional solution, baffles are provided on both sides of the slide rail along the width direction, the bottom end of the shape-changing seat is slidably engaged with the slide rail, and the shape-changing seat is slidably connected to the corresponding baffles on both sides along the width direction.
[0014] As an optional solution, the clamping assembly further includes a lifting plate, the output end of the second drive component is connected to the lifting plate, and the pressure plate is detachably installed at the bottom end of the lifting plate.
[0015] As an optional solution, the end face of the pressure plate opposite to the lifting plate is provided with an elastic pressure block, which is configured to elastically press against the current transformer housing that moves to the positioning member in the pressing position.
[0016] As an optional solution, the end face of the pressure plate opposite to the lifting plate is provided with a plurality of elastic pressure blocks, and the plurality of elastic pressure blocks are arranged at intervals along the circumferential edge of the pressure surface of the transformer housing.
[0017] As an optional solution, a guide post is provided inside the frame along the height direction, and the lifting plate is provided with a guide hole, and the lifting plate is sleeved on the guide post through the guide hole.
[0018] As an optional solution, the platform is equipped with a position sensor, which is configured to detect whether the positioning component has moved to the pressing station. The position sensor is communicatively connected to the first driving component and the second driving component, respectively.
[0019] As an optional solution, the test stand includes:
[0020] A base plate having the pressing station and the loading / unloading station; the positioning element is slidably disposed on the base plate;
[0021] A top plate is disposed above the bottom plate, and the second driving member is disposed on the top plate; along the height direction, the projection of the top plate onto the bottom plate does not coincide with the loading and unloading station.
[0022] The beneficial effects of this utility model are as follows:
[0023] The clamping fixture for the current transformer proposed in this utility model pre-assembles the upper housing onto the lower housing to form a shell during the assembly of the upper and lower housings of the current transformer. A first driving component drives a positioning component to move to the loading / unloading station, installing the shell into the positioning groove of the positioning component. Then, the first driving component drives the positioning component to move to the clamping station. A second driving component drives a pressure plate to descend along the height direction and clamp the shell, thus achieving a tight seal between the upper and lower housings. This clamping fixture for the current transformer achieves automatic assembly of the housing, eliminating the need for manual hammering, improving assembly efficiency, and preventing hammer marks from being left on the surface of the housing, thus improving the appearance quality after assembly. Furthermore, the pressure plate evenly presses against the housing, achieving a tight seal between the upper and lower housings, improving the assembly quality of the current transformer housing. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the clamping fixture for the current transformer provided in this embodiment of the utility model;
[0025] Figure 2 This is a schematic diagram of the positioning component installed on the base plate according to an embodiment of the present invention;
[0026] Figure 3 This is a schematic diagram of the clamping assembly provided in this embodiment of the present invention installed on the top plate.
[0027] The component names and labels in the diagram are as follows:
[0028] 1. Frame; 11. Base plate; 12. Top plate; 13. Column; 2. First drive component; 3. Positioning component; 31. Changing seat; 32. Positioning plate; 321. Positioning groove; 4. Second drive component; 5. Pressure plate; 6. Slide rail; 7. Baffle; 8. Lifting plate; 81. Guide hole; 9. Elastic pressure block; 10. Guide column. Detailed Implementation
[0029] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.
[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0032] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0034] Molded case instrument transformers typically consist of an upper and a lower housing. The upper and lower housings are manually assembled by tapping them together with a rubber mallet. However, this manual assembly process is time-consuming and inefficient, making it unsuitable for mass production. Furthermore, when the upper (or lower) housing is tapped, the edge furthest from the tapping area may warp, creating gaps between the upper and lower housings and resulting in loose assembly, thus affecting the transformer's assembly quality. Additionally, the tapping process may leave hammer marks on the upper housing's surface, degrading the transformer housing's appearance.
[0035] To solve the above problems, such as Figure 1 and Figure 2As shown, this embodiment proposes a clamping fixture for a current transformer. The clamping fixture includes a frame 1, a positioning assembly, and a clamping assembly. The frame 1 has a clamping station and a loading / unloading station. The positioning assembly includes a first driving member 2 and a positioning member 3. The positioning member 3 is slidably disposed on the frame 1, and its top end has a positioning groove 321 adapted to the current transformer housing. The first driving member 2 is driven to the positioning member 3 to drive the positioning member 3 to move between the clamping station and the loading / unloading station. The clamping assembly includes a second driving member 4 and a pressure plate 5. The second driving member 4 is disposed above the clamping station on the frame 1 and is driven to the pressure plate 5 to drive the pressure plate 5 to descend along the height direction (vertical direction in the figure) and clamp the current transformer housing that has moved to the clamping station within the positioning member 3. When assembling the upper and lower housings of the current transformer, the upper housing is pre-assembled onto the lower housing to form the housing. The first driving component 2 drives the positioning component 3 to move to the loading / unloading station, installing the housing into the positioning groove 321 of the positioning component 3. Then, the first driving component 2 drives the positioning component 3 to move to the clamping station. The second driving component 4 drives the pressure plate 5 to descend along the height direction and clamp the housing, thereby achieving the closing and clamping of the upper and lower housings. The clamping fixture of the current transformer realizes the automatic assembly of the current transformer housing, eliminating the need for manual hammering, improving assembly efficiency, and preventing hammer marks from being left on the surface of the housing, thus improving the appearance quality of the assembled current transformer housing. Moreover, the pressure plate 5 evenly presses against the housing, achieving a tight closing of the upper and lower housings, improving the assembly quality of the current transformer housing.
[0036] like Figure 1 As shown, the frame 1 includes a base plate 11 and a top plate 12. The base plate 11 has a clamping station and a loading / unloading station. A positioning member 3 is slidably disposed on the base plate 11. The top plate 12 is disposed above the base plate 11, and a second driving member 4 is disposed on the top plate 12. Along the height direction, the projection of the top plate 12 onto the base plate 11 does not coincide with the loading / unloading station. The top plate 12 is located directly above the clamping station of the base plate 11, so that the pressure plate 5 descends from its initial position along the height direction and clamps the current transformer housing that has moved to the clamping station. After the pressure plate 5 completes its clamping action, the second driving member 4 drives the pressure plate 5 to rise back to its initial position. Since the projection of the top plate 12 onto the bottom plate 11 does not coincide with the loading and unloading station, i.e. the loading and unloading station is located outside the top plate 12, the top plate 12 will not block the loading and unloading station. This makes it easy for the operator to place the current transformer housing (the pre-assembled upper and lower housings) into the positioning groove 321 of the positioning component 3 that has been moved to the loading and unloading station, or to remove the pressed housing from the positioning groove 321. This enables the rapid loading and unloading operation of the current transformer housing.
[0037] Specifically, the platform 1 also includes columns 13, which are supported between the base plate 11 and the top plate 12, simplifying the structure of the platform 1 and improving its stability. Columns 13 are provided at each of the four corners of the base plate 11 and the top plate 12 to provide stable support for the top plate 12. In other embodiments, the number of columns 13 can be flexibly adjusted, as long as the stability of the platform 1 structure is ensured; no specific limitation is made here.
[0038] It should be noted that the frame 1 is equipped with an electrically connected control module and a position sensor. The position sensor is configured to detect whether the positioning component 3 has moved to the clamping station. The position sensor is communicatively connected to the first drive component 2 and the second drive component 4. Specifically, the position sensor can be a magnetic induction switch, etc. When the positioning component 3 moves to the clamping station, the position sensor is triggered, and the position sensor sends a signal to the control module. The control module controls the first drive component 2 to stop based on the received signal, and simultaneously controls the second drive component 4 to start, so that the second drive component 4 drives the pressure plate 5 to descend along the height direction from the initial position and clamp the current transformer housing that has moved to the clamping station. After the current transformer housing is clamped, the control module controls the second drive component 4 to drive the pressure plate 5 to rise to the initial position. Finally, the control module controls the first drive component 2 to drive the positioning component 3 to move to the loading and unloading station to complete the loading and unloading operation of the current transformer housing. The position sensor and control module mentioned above are all existing technologies, and their structure and working principle will not be described in detail.
[0039] like Figure 2 As shown, the positioning component 3 includes a changing seat 31 and a positioning disk 32, with the output end of the first driving component 2 connected to the changing seat 31. The positioning disk 32 is detachably mounted on the changing seat 31, and a positioning groove 321 is provided at the top of the positioning disk 32. Since there are various types of current transformers, the structure and model of the current transformer housing also differ. Different types of positioning disks 32 are designed and manufactured according to different current transformer housings. The positioning groove 321 of each positioning disk 32 is adapted to different current transformer housings to achieve 360° circumferential positioning of the current transformer housing. In this embodiment, the positioning disk 32 and the changing seat 31 are connected by bolts, which not only improves the connection strength between the positioning disk 32 and the changing seat 31 but also enables the detachable assembly of the positioning disk 32 on the changing seat 31. This allows for flexible replacement of the corresponding positioning disk 32 according to different current transformer housings, ensuring that the current transformer clamping fixture meets the assembly operations of different current transformer housings and improving the versatility of the current transformer clamping fixture.
[0040] like Figure 1 and Figure 2As shown, the frame 1 is equipped with a slide rail 6. One end of the slide rail 6 extends at least to the clamping station along its length (front-back direction in the figure), and the other end extends at least to the loading / unloading station. A shape-changing seat 31 is slidably mounted on the slide rail 6. Through the sliding engagement between the shape-changing seat 31 and the slide rail 6, the movement of the positioning component 3 between the clamping station and the loading / unloading station is guided and limited, improving the stability and accuracy of the positioning component 3's movement. Specifically, the slide rail 6 extends along its length, and multiple slide rails 6 can be provided along their width (left-right direction in the figure) to allow the shape-changing seat 31 to slide with multiple slide rails 6, further improving the stability and accuracy of the positioning component 3's movement.
[0041] In an optional embodiment, baffles 7 are provided on both sides of the slide rail 6 along the width direction. The bottom end of the shape-changing seat 31 is slidably engaged with the slide rail 6, and the two sides of the shape-changing seat 31 along the width direction are slidably connected to the corresponding baffles 7. Through the above arrangement, the two baffles 7 limit the shape-changing seat 31 in the width direction, preventing the shape-changing seat 31 from shaking or shifting position, and further improving the stability and accuracy of the movement of the positioning member 3. Specifically, the shape-changing seat 31 is located between the two baffles 7, and the positioning disk 32 is located above the two baffles 7.
[0042] like Figure 3 As shown, the clamping assembly also includes a lifting plate 8, the output end of the second drive component 4 is connected to the lifting plate 8, and the pressure plate 5 is detachably installed at the bottom end of the lifting plate 8. Specifically, the lifting plate 8 and the pressure plate 5 are connected by bolts, which not only improves the connection strength between the lifting plate 8 and the pressure plate 5, but also enables the lifting plate 8 and the pressure plate 5 to be detachably assembled, so that the corresponding pressure plate 5 can be flexibly replaced according to different current transformer housings, so that the pressure plate 5 evenly covers the pressure surface of the current transformer housing, ensuring the uniformity of the current transformer housing when it is closed and clamped.
[0043] like Figure 1 and Figure 3 As shown, guide posts 10 are arranged along the height direction inside the frame 1, and the lifting plate 8 is provided with guide holes 81. The lifting plate 8 is sleeved on the guide posts 10 through the guide holes 81. The guide posts 10 pass through the guide holes 81 to achieve sliding cooperation between the lifting plate 8 and the guide posts 10. The guide posts 10 guide and limit the lifting movement of the lifting plate 8 and the pressure plate 5 along the height direction, thereby improving the stability and accuracy of the lifting movement of the lifting plate 8 and the pressure plate 5. Specifically, four guide posts 10 are provided, and guide holes 81 are provided at the four corners of the lifting plate 8. The four guide posts 10 pass through the corresponding guide holes 81, further improving the stability and accuracy of the lifting movement of the lifting plate 8 and the pressure plate 5. In other embodiments, the number of guide posts 10 can be flexibly adjusted according to needs, and no specific limitation is made here.
[0044] In optional embodiments, such as Figure 3As shown, an elastic pressure block 9 is provided on the end face of the pressure plate 5 opposite to the lifting plate 8. The elastic pressure block 9 is configured to elastically press against the transformer housing inside the positioning member 3, which has moved to the pressing position. The pressure plate 5 presses against the transformer housing through the elastic pressure block 9, thereby achieving elastic pressing of the transformer housing and avoiding damage to the transformer housing. The elastic pressure block 9 can be an elastic element such as a rubber block, and is not specifically limited here.
[0045] In this embodiment, a plurality of elastic pressure blocks 9 are provided on the end face of the pressure plate 5 away from the lifting plate 8. The plurality of elastic pressure blocks 9 are arranged at intervals along the circumferential edge of the pressure-bearing surface of the transformer housing. Through the above arrangement, the plurality of elastic pressure blocks 9 are pressed against the circumferential edge of the pressure-bearing surface of the transformer housing, so that the housing is uniformly stressed and the edges of the upper and lower housings are prevented from partially warping and creating gaps, thus achieving uniform compression of the transformer housing. Of course, the elastic pressure blocks 9 can also be elastically pressed against the center position of the pressure-bearing surface of the transformer housing to ensure uniform stress on the pressure-bearing surface of the transformer housing.
[0046] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A clamping fixture for a current transformer, characterized in that, include: A stand (1) having a pressing station and a loading / unloading station; The positioning component includes a first driving member (2) and a positioning member (3). The positioning member (3) is slidably disposed on the platform (1). The top of the positioning member (3) is provided with a positioning groove (321) adapted to the housing of the current transformer. The first driving member (2) is connected to the positioning member (3) in a transmission manner to drive the positioning member (3) to move between the pressing station and the loading and unloading station. The clamping assembly includes a second drive member (4) and a pressure plate (5). The second drive member (4) is disposed above the clamping station of the platform (1) and is connected to the pressure plate (5) in a transmission manner to drive the pressure plate (5) to descend along the height direction and clamp the current transformer housing that has moved to the positioning member (3) in the clamping station.
2. The clamping fixture for the current transformer according to claim 1, characterized in that, The positioning element (3) includes: The shape change seat (31) is connected to the output end of the first driving member (2); Positioning disk (32), which is detachably mounted on the changing seat (31), and the top of the positioning disk (32) is provided with the positioning groove (321).
3. The clamping fixture for the current transformer according to claim 2, characterized in that, The frame (1) is provided with a slide rail (6), one end of the slide rail (6) along the length direction extends at least to the pressing station, and the other end of the slide rail (6) along the length direction extends at least to the loading and unloading station; the changing seat (31) is slidably disposed on the slide rail (6).
4. The clamping fixture for the current transformer according to claim 3, characterized in that, The slide rail (6) is provided with baffles (7) on both sides along the width direction. The bottom end of the shape change seat (31) is slidably engaged with the slide rail (6). The shape change seat (31) is slidably connected to the corresponding baffles (7) on both sides along the width direction.
5. The clamping fixture for the current transformer according to claim 1, characterized in that, The clamping assembly also includes a lifting plate (8), the output end of the second driving member (4) is connected to the lifting plate (8), and the pressure plate (5) is detachably installed at the bottom end of the lifting plate (8).
6. The clamping fixture for the current transformer according to claim 5, characterized in that, The end face of the pressure plate (5) facing away from the lifting plate (8) is provided with an elastic pressure block (9), which is configured to elastically press against the transformer housing in the positioning member (3) that moves to the pressing station.
7. The clamping fixture for the current transformer according to claim 6, characterized in that, The end face of the pressure plate (5) facing away from the lifting plate (8) is provided with a plurality of elastic pressure blocks (9), and the plurality of elastic pressure blocks (9) are arranged at intervals along the circumferential edge of the pressure surface of the transformer housing.
8. The clamping fixture for the current transformer according to claim 5, characterized in that, The platform (1) is provided with guide posts (10) along the height direction, and the lifting plate (8) is provided with guide holes (81). The lifting plate (8) is sleeved on the guide posts (10) through the guide holes (81).
9. The clamping fixture for the current transformer according to any one of claims 1 to 8, characterized in that, The stand (1) is equipped with a position sensor, which is configured to detect whether the positioning member (3) has moved to the pressing station. The position sensor is communicatively connected to the first driving member (2) and the second driving member (4).
10. The clamping fixture for the current transformer according to any one of claims 1 to 8, characterized in that, The platform (1) includes: The base plate (11) has the pressing station and the loading / unloading station; the positioning member (3) is slidably disposed on the base plate (11); A top plate (12) is disposed above the bottom plate (11), and the second driving member (4) is disposed on the top plate (12); along the height direction, the projection of the top plate (12) on the bottom plate (11) does not coincide with the loading and unloading station.