A device for grinding the housing of a current transformer

Abstract

This invention provides a device for grinding the housing of a current transformer, belonging to the field of current transformer processing technology. The device includes a grinding base and a grinding top, with a clamping assembly between them. A grinding mechanism is located on the outer side of the clamping assembly. The clamping assembly includes a clamping turntable, with a clamping hole extending along its axial direction at the top edge of the turntable. An opening is provided at the connection between the sidewall of the clamping hole and the edge of the turntable. A clamping groove extending radially along the turntable is provided in the middle of the sidewall of the clamping hole, and a clamping mechanism is provided within the clamping groove. The clamping mechanism includes a clamping slider that slides radially along the turntable. A connecting slider is located on the side of the clamping slider away from the clamping hole. By setting the grinding base, grinding top, and grinding mechanism, all outer surfaces of the current transformer housing can be ground simultaneously. Furthermore, by setting the clamping assembly, the device can also clamp and grind current transformer housings of various diameters.

Description

Technical Field

[0001] This invention belongs to the field of current transformer processing technology, specifically relating to a current transformer housing grinding device. Background Technology

[0002] Instrument transformers, also known as instrument transformers, are a general term encompassing current transformers and voltage transformers. They convert high voltage to low voltage and large current to small current, and are used in measurement or protection systems. They perform functions such as electrical isolation, voltage transformation, and current transformation. The transformer housing is formed by casting, and its surface is prone to burrs and flash. Therefore, the transformer housing needs to undergo a grinding process during manufacturing to improve the surface quality and meet accuracy requirements.

[0003] Chinese patent CN107671674B discloses a high-efficiency high-voltage transformer housing grinding device, comprising a controller, a horizontal slider, an upper movable plate, a lower movable plate, a base plate, a first vertical plate, a first column, a second vertical plate, a second column, and a grinding top seat. A lifting cylinder connects the upper movable plate and the grinding top seat, and a spring connects the upper and lower movable plates. The lower movable plate is fixed with a first upper pulley, a second upper pulley, and a drive wheel unit. Two support devices are fixed on the base plate. This invention's grinding device can grind the housings of two transformers at once, achieving high grinding efficiency.

[0004] Existing instrument transformer housing grinding equipment can only grind one surface of the instrument transformer housing at a time. After grinding one surface, the workpiece or grinding head needs to be adjusted before the other surfaces of the instrument transformer housing can be ground. This process results in low grinding efficiency for instrument transformer housings and requires multiple manual operations to complete the grinding work for a single instrument transformer housing. Summary of the Invention

[0005] The purpose of this invention is to provide a current transformer housing grinding device, which aims to solve the problem in the prior art that only one surface of the current transformer housing can be ground at a time, and after grinding one surface, the workpiece or grinding head needs to be adjusted before the other surfaces of the current transformer housing can be ground.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a current transformer housing grinding device, comprising a grinding base and a grinding top seat, a clamping assembly provided between the grinding base and the grinding top seat, a grinding mechanism provided on the outer side of the clamping assembly, the clamping assembly including a clamping turntable, a clamping hole extending along its axial direction being provided at the top edge of the clamping turntable, an opening being provided at the connection between the side wall of the clamping hole and the edge of the clamping turntable, a clamping groove extending radially along the clamping turntable being provided in the middle of the side wall of the clamping hole, and a clamping mechanism being provided in the clamping groove.

[0007] The clamping mechanism includes a clamping slider that slides radially along the clamping turntable. A connecting slider is provided on the side of the clamping slider away from the clamping hole. An adjusting groove is provided on the top of the clamping turntable, extending radially and communicating with the clamping groove. A guide post with its axis extending radially along the clamping turntable is fixedly installed on the inner wall of the adjusting groove. A transmission slider that slides on the outer wall of the guide post is fixedly installed on the top of the connecting slider. A clamping elastic element that is sleeved on the outer wall of the guide post is fixedly installed between the side of the transmission slider away from the clamping slider and the inner wall of the adjusting groove.

[0008] There are at least two clamping holes, and multiple clamping holes are evenly distributed along the circumference of the clamping turntable.

[0009] The beneficial effects of this invention are as follows: By setting up a clamping turntable, clamping holes, and a clamping mechanism, when grinding the current transformer housing, it can be placed in the clamping hole, ensuring that the axis of the current transformer housing is parallel to the axis of the clamping hole. Subsequently, the clamping mechanism clamps the current transformer housing at the opening where the side wall of the clamping hole connects to the edge of the clamping turntable. When the clamping turntable is driven to rotate, the current transformer housing rotates accordingly. At this time, the grinding base, grinding top, and grinding mechanism can simultaneously grind all outer surfaces of the current transformer housing. Furthermore, by setting up a clamping mechanism to clamp the current transformer housing, this device can be applied to current transformer housings of various diameters and perform effective clamping and grinding. Simultaneously, by setting up multiple clamping holes, multiple current transformer housings can be clamped and ground synchronously, thereby greatly improving the grinding efficiency of the device.

[0010] The clamping slider has mounting grooves at both ends of the side wall near the clamping hole. Each mounting groove contains a support shaft with an axis parallel to the axis of the clamping turntable. A drive shaft with an axis parallel to the axis of the clamping turntable is rotatably mounted at the end of the clamping groove away from the clamping hole. A drive belt is connected between the drive shaft and the outer wall of the two support shafts. A tensioning element for tensioning the drive belt is installed at the end of the clamping groove away from the clamping hole.

[0011] The effect is that, by setting up a drive shaft, support shaft, and drive belt, the drive belt is positioned between them when the clamping slider clamps the transformer housing. During the grinding process of the transformer housing, the clamping turntable drives the transformer housing to rotate, while the drive shaft drives the transformer housing to rotate via the drive belt. In this way, the device can simultaneously grind both ends and side walls of the transformer housing, thereby improving grinding efficiency.

[0012] The clamping groove has symmetrical guide grooves on the top and bottom walls of the end away from the clamping hole, which are perpendicular to the direction of movement of the clamping slider. The tensioning element includes four guide sliders, which are slidably installed at both ends of the two guide grooves. A tensioning elastic element is fixedly connected between the two guide sliders in the same guide groove. A tensioning column is fixedly installed between the corresponding guide sliders in the two guide grooves. Both tensioning columns are in contact with the inner wall of the transmission belt.

[0013] The effect is that, by setting up guide sliders, tensioning elastic elements, and tensioning columns, when the clamping slider moves away from the drive shaft, the drive belt tightens and drives the two tensioning columns closer together. At this time, the guide sliders mounted on these two tensioning columns also move closer together, compressing the tensioning elastic element. Conversely, when the clamping slider moves closer to the drive shaft, the drive belt loosens. At this time, the tensioning elastic element begins to release the elastic force accumulated during compression, driving the two tensioning columns and the guide sliders fixed on them to move away from each other, thereby tensioning the loosened drive belt. In this way, it can be ensured that the drive belt is always in a taut state, enabling it to operate normally and transmit power, thereby driving the transformer housing to rotate during the grinding process.

[0014] The top wall of the grinding base has an annular groove concentric with it. A fixed external gear ring concentric with it is fixedly installed on the inner wall of the annular groove. The bottom end of the drive shaft passes through the clamping turntable and extends into the annular groove, where a drive gear is fixedly installed. The drive gear meshes with the fixed external gear ring.

[0015] The effect is that, by setting up a transmission gear and a fixed external gear ring, when the clamping turntable drives the transmission shaft to rotate, the transmission shaft will drive the transmission gear mounted at the bottom to rotate along the circumference of the fixed external gear ring. Since the fixed external gear ring and the transmission gear are meshed with each other, while the transmission shaft drives the transmission gear to rotate along the circumference of the fixed external gear ring, the transmission gear will also drive the transmission shaft to rotate under the action of the fixed external gear ring. In this way, the device can drive the transmission shaft to rotate while driving the clamping turntable to rotate, thereby driving the transformer housing to rotate, without the need for an additional drive source.

[0016] The grinding mechanism includes support columns and grinding belts. There are multiple support columns, which are evenly arranged in a semi-circular shape between the grinding base and the grinding top seat along the circumference of the clamping turntable. The top and bottom of the support columns are fixedly connected to the grinding top seat and the grinding base, respectively. The grinding belt is wrapped around the outer wall of the multiple support columns, and one side of the outer wall of the grinding belt is in contact with the outer wall of the clamping turntable.

[0017] The effect is that, by setting up multiple support columns distributed in a semi-circular shape, and abrasive belts wrapped around the outer walls of these support columns, the abrasive belts can be tightly attached to the outer wall of the clamping turntable along its circumference. Therefore, when the clamping turntable drives the transformer housing to rotate, the abrasive belts can effectively polish the side walls of the transformer housing.

[0018] A lower grinding component is fixedly installed on the top of the grinding base. The lower grinding component is a ring-shaped grinding wheel and is concentrically set with the clamping turntable. The lower grinding component is located below the clamping hole.

[0019] The grinding top seat is a semi-circular plate and is coaxially set with the clamping turntable. An upper grinding component is fixedly installed at the bottom of the grinding top seat. The upper grinding component is a semi-circular grinding wheel and corresponds to the lower grinding component.

[0020] A grinding motor is fixedly installed on the top of the grinding base. A rotating shaft coaxial with the clamping turntable is rotatably installed on the bottom of the grinding base. The bottom end of the rotating shaft passes through the clamping turntable and is rotatably connected to the grinding base. The clamping turntable is fixedly connected to the outer wall of the rotating shaft. The top of the rotating shaft passes through the grinding base and is connected to the output shaft of the grinding motor.

[0021] Both the clamping elastic element and the tensioning elastic element are springs.

[0022] The effect is that, by setting up lower and upper grinding components, the grinding motor drives the clamping turntable to rotate via a rotating shaft. While rotating, the clamping turntable not only drives the current transformer housing to rotate synchronously (referring to its revolution around the center of the clamping turntable), but also drives the current transformer housing to rotate on its own axis. Therefore, the lower grinding component grinds the lower end face of the current transformer housing, while the upper grinding component grinds the upper end face of the current transformer housing.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. By incorporating a clamping turntable, clamping holes, and a clamping mechanism, the current transformer housing can be placed in the clamping hole during grinding, ensuring that the axis of the current transformer housing is parallel to the axis of the clamping hole. Subsequently, the clamping mechanism clamps the current transformer housing at the opening where the side wall of the clamping hole connects to the edge of the clamping turntable. When the clamping turntable is rotated, the current transformer housing rotates accordingly. At this time, the grinding base, grinding top, and grinding mechanism can simultaneously grind all outer surfaces of the current transformer housing. Furthermore, by clamping the current transformer housing with the clamping mechanism, this device is suitable for current transformer housings of various diameters and can effectively clamp and grind them. Simultaneously, by providing multiple clamping holes, multiple current transformer housings can be clamped and ground synchronously, greatly improving the grinding efficiency of the device.

[0025] 2. By configuring a drive shaft, support shaft, and drive belt, the drive belt is positioned between the clamping slider and the transformer housing. During the grinding process of the transformer housing, the clamping turntable drives the transformer housing to rotate, while the drive shaft drives the transformer housing to rotate via the drive belt. In this way, the device can simultaneously grind both ends and side walls of the transformer housing, thereby improving grinding efficiency.

[0026] 3. By configuring guide sliders, tensioning elastic elements, and tensioning columns, when the clamping slider moves away from the drive shaft, the drive belt tightens and drives the two tensioning columns closer together. At this time, the guide sliders mounted on these two tensioning columns also move closer together, compressing the tensioning elastic element. Conversely, when the clamping slider approaches the drive shaft, the drive belt loosens. At this time, the tensioning elastic element begins to release the elastic force accumulated during compression, driving the two tensioning columns and the guide sliders fixed on them to move away from each other, thereby tensioning the loosened drive belt. This ensures that the drive belt is always taut, allowing it to operate normally and transmit power, thereby driving the transformer housing to rotate during the grinding process. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the polishing device of the present invention;

[0028] Figure 2 This is a top view of the clamping assembly in this invention.

[0029] Figure 3 This is a top cross-sectional view of the clamping assembly in this invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A;

[0031] Figure 5 This is a schematic front sectional view of the clamping assembly in this invention;

[0032] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0033] Figure 7 This is a top view of the grinding base in this invention.

[0034] In the diagram: 1. Grinding base; 11. Lower grinding component; 12. Annular groove; 2. Grinding top seat; 21. Upper grinding component; 3. Clamping assembly; 31. Clamping turntable; 311. Clamping hole; 312. Clamping groove; 313. Guide slide groove; 314. Adjusting slide groove; 32. Clamping mechanism; 321. Clamping slider; 3211. Mounting groove; 322. Connecting slider; 3221. Transmission slider; 3222. 323 Clamping elastic element; 324 Support shaft; 325 Drive shaft; 325 Tensioning element; 3251 Tensioning column; 3252 Guide slider; 3253 Tensioning elastic element; 326 Drive belt; 327 Guide column; 328 Drive gear; 329 Fixed external gear ring; 33 Rotating shaft; 4 Grinding motor; 5 Grinding mechanism; 51 Support column; 52 Grinding sanding belt; 6 Current transformer housing. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Please see Figures 1-7 The present invention provides the following technical solution: a current transformer housing grinding device, including a grinding base 1, a grinding top seat 2, a clamping assembly 3, a grinding motor 4 and a grinding mechanism 5.

[0037] refer to Figure 1 and Figure 5 As shown, a lower grinding component 11 is fixedly installed on the top of the grinding base 1. The lower grinding component 11 is an annular grinding wheel and is concentrically arranged with the clamping turntable 31 to ensure the uniformity of grinding.

[0038] The grinding top seat 2 is a semi-circular plate and is coaxially arranged with the clamping turntable 31. The grinding top seat 2 is located above the grinding base 1, and an upper grinding component 21 is fixedly installed on its bottom. The upper grinding component 21 is a semi-annular grinding wheel, which corresponds to the lower grinding component 11 and together completes the grinding work on the transformer housing 6.

[0039] When polishing the current transformer housing 6, it must first be clamped onto the clamping assembly 3. Then, driven by the clamping assembly 3, the current transformer housing 6 begins to rotate. This rotation causes the top and bottom ends of the current transformer housing 6 to rub against the upper polishing part 21 and the lower polishing part 11, respectively, thereby achieving the polishing of the top and bottom of the current transformer housing 6.

[0040] refer to Figures 2-7 As shown, the clamping assembly 3 is located between the grinding base 1 and the grinding top seat 2. Its main function is to clamp the current transformer housing 6 for grinding. The clamping assembly 3 specifically includes a clamping turntable 31, a clamping mechanism 32, and a rotating shaft 33.

[0041] refer to Figure 3 and Figure 4 As shown, a clamping hole 311 extending along its axial direction is provided at the top edge of the clamping turntable 31. The current transformer housing 6 is placed in the clamping hole 311, and its axis is parallel to the axis of the clamping hole 311. There are at least two clamping holes 311, and these clamping holes 311 are evenly distributed along the circumference of the clamping turntable 31. Each clamping hole 311 has an opening at the connection between its sidewall and the edge of the clamping turntable 31. This design allows the sidewall portion of the current transformer housing 6 to extend out of the clamping hole 311 through the opening, facilitating subsequent processing operations. In addition, each clamping hole 311 also has a clamping groove 312 extending radially along the clamping turntable 31 for mounting the clamping mechanism 32 in the middle of its sidewall, for further fixing the current transformer housing 6.

[0042] The clamping turntable 31 is provided with multiple clamping holes 311, which allows the clamping turntable 31 to clamp multiple current transformer housings 6 at the same time, thereby realizing the simultaneous grinding of multiple current transformer housings 6. In addition, the sidewalls of the clamping holes 311 are provided with openings at the connection between them and the edge of the clamping turntable 31. This design allows the sidewalls of the current transformer housings 6 to make full contact with the grinding part of the grinding mechanism 5, thereby ensuring effective grinding of the sidewalls of the current transformer housings 6.

[0043] refer to Figures 4-7 As shown, the number of clamping mechanisms 32 is consistent with the number of clamping slots 312, that is, each clamping slot 312 is equipped with a corresponding clamping mechanism 32. These clamping mechanisms 32 are independent and have the same structure, specifically including components such as clamping slider 321, connecting slider 322, support shaft 323, transmission shaft 324, tensioning element 325, transmission belt 326, guide post 327, transmission gear 328, and fixed external gear ring 329.

[0044] refer to Figure 4 and Figure 6 As shown, the clamping slider 321 slides radially along the clamping turntable 31 within the clamping groove 312, and the length direction of the clamping slider 321 is perpendicular to its direction of movement. The connecting slider 322 is fixedly installed on the side of the clamping slider 321 away from the clamping hole 311. The top of the clamping turntable 31 has an adjusting groove 314 extending radially and communicating with the clamping groove 312. The number of adjusting grooves 314 is consistent with the number of clamping grooves 312, and they correspond one-to-one. A transmission slider 3221 is fixedly installed on the top of the connecting slider 322, and the top end of the transmission slider 3221 extends into the corresponding adjusting groove 314. A clamping elastic element 3222 is fixedly installed between the side of the transmission slider 3221 away from the clamping slider 321 and the inner wall of the adjusting groove 314. The clamping elastic element 3222 can be a spring or made of other elastic materials.

[0045] When clamping the current transformer housing 6, push the transmission slider 3221, causing it to drive the clamping slider 321 to move radially away from the clamping hole 311 via the connecting slider 322, and compress the clamping elastic element 3222. This allows the current transformer housing 6 to be placed into the clamping hole 311 of the clamping turntable 31. Then, stop applying force to the transmission slider 3221. At this point, the elastic force accumulated in the clamping elastic element 3222 due to compression begins to release, pushing the transmission slider 3221, the connecting slider 322, and the clamping slider 321 to move in opposite directions, thereby pressing the current transformer housing 6 against the opening at the connection between the side wall of the clamping hole 311 and the edge of the clamping turntable 31. When pushing the transmission slider 3221, an external automatic telescopic rod can be used as the drive source; this automatic telescopic rod can be a pneumatic cylinder, a hydraulic cylinder, or an electric telescopic rod, etc.

[0046] The clamping slider 321 has mounting grooves 3211 at both ends of its sidewall near the clamping hole 311. Two support shafts 323 are installed in the two mounting grooves 3211 respectively, and their axes are parallel to the axis of the clamping turntable 31. A drive shaft 324 is rotatably mounted at the end of the clamping groove 312 away from the clamping hole 311, and its axis is also parallel to the axis of the clamping turntable 31. A drive belt 326, with its ends connected, is wound around the outer walls of the drive shaft 324 and the two support shafts 323, and is a synchronous toothed belt. The outer wall of the drive shaft 324 has synchronous teeth that mesh with the drive belt 326. When the clamping slider 321 clamps the transformer housing 6 at the opening of the clamping hole 311, the outer wall of the drive belt 326 is in close contact with the outer wall of the transformer housing 6. At this time, if the drive shaft 324 drives the drive belt 326, the drive belt 326 will in turn drive the transformer housing 6 to rotate.

[0047] When the clamping slider 321 presses the transformer housing 6 against the opening at the junction of the side wall of the clamping hole 311 and the edge of the clamping turntable 31, the transmission belt 326 is positioned between the clamping slider 321 and the transformer housing 6. Subsequently, when the clamping turntable 31 drives the transformer housing 6 to rotate around its own axis, the transmission shaft 324 rotates synchronously. This rotational motion is transmitted to the transformer housing 6 via the transmission belt 326, causing it to rotate as well, in the same direction as the rotation of the clamping turntable 31. In this way, the entire side wall of the transformer housing 6 can be rotated sequentially to the opening at the junction of the side wall of the clamping hole 311 and the edge of the clamping turntable 31, thus allowing it to be fully polished by the polishing mechanism 5. Furthermore, by driving the transformer housing 6 to rotate, the polishing effect can be further enhanced.

[0048] At the end of the clamping groove 312 away from the clamping hole 311, symmetrical guide grooves 313 are formed on its top and bottom walls. These guide grooves 313 are perpendicular to the moving direction of the clamping slider 321. The tensioning member 325 includes four guide sliders 3252, which are slidably installed at both ends of the two guide grooves 313. Between two guide sliders 3252 in the same guide groove 313, a tensioning elastic member 3253 is fixedly connected. The tensioning elastic member 3253 can be a spring or an elastic sheet. Between corresponding guide sliders 3252 in the two guide grooves 313, tensioning posts 3251 are fixedly installed. Both tensioning posts 3251 are in contact with the inner wall of the transmission belt 326. Their function is to automatically adjust the tension of the transmission belt 326 when the clamping slider 321 drives the support shaft 323 to move, ensuring that the transmission belt 326 is always in a taut state.

[0049] When the clamping slider 321 moves towards the clamping hole 311 along the radial direction of the clamping turntable 31, the transmission belt 326 is tightened due to the tension caused by the clamping slider 321 moving away from the drive shaft 324. The tightened transmission belt 326 can drive the two tensioning columns 3251 to move closer to each other. At the same time, the two guide sliders 3252 located in the same guide groove 313 will also move closer to each other under the action of the tensioning column 3251, compressing the tensioning elastic element 3253. Conversely, when the clamping slider 321 moves away from the clamping hole 311 along the radial direction of the clamping turntable 31, the transmission belt 326 will loosen and no longer apply external force to the tensioning column 3251 because the clamping slider 321 is close to the drive shaft 324. At this time, the tensioning elastic element 3253 begins to release its elastic force, causing the two guide sliders 3252 located in the same guide groove 313 to move away from each other, thereby causing the two tensioning columns 3251 to move away from each other, thus tensioning the transmission belt 326 to prevent it from loosening.

[0050] The axis of the guide post 327 extends radially along the clamping turntable 31, and both ends of the guide post 327 are fixedly installed on the inner walls of the adjusting slide groove 314. The connecting slider 322 is slidably sleeved on the outer wall of the guide post 327, and at the same time, the clamping elastic element 3222 is also slidably sleeved on the outer wall of the guide post 327.

[0051] refer to Figure 5 and Figure 7 As shown, the top wall of the grinding base 1 has an annular groove 12 concentric with it. The fixed external gear ring 329 is fixedly installed on the annular inner wall of the annular groove 12, and the two are kept concentric. The transmission gear 328 meshes with the fixed external gear ring 329. The bottom end of the transmission shaft 324 passes through the clamping turntable 31 and extends into the annular groove 12, and is fixedly connected to the top end of the transmission gear 328. The transmission shaft 324 and the transmission gear 328 are kept coaxial.

[0052] While the clamping turntable 31 drives the transformer housing 6 to rotate around its own axis, the drive shaft 324, driven by the clamping turntable 31, drives the drive gear 328 to rotate along the circumference of the fixed external gear ring 329. Since the drive gear 328 meshes with the fixed external gear ring 329, the drive gear 328, guided by the fixed external gear ring 329, drives the drive shaft 324 to rotate. Therefore, during the rotation of the clamping turntable 31, the drive shaft 324 can be driven to rotate simultaneously without the need for an additional drive source.

[0053] The rotating shaft 33 is rotatably mounted on the bottom of the grinding top seat 2 and is coaxially arranged with the clamping turntable 31. The bottom end of the rotating shaft 33 passes through the clamping turntable 31 and is rotatably connected to the grinding base 1. The clamping turntable 31 is fixedly connected to the outer wall of the rotating shaft 33.

[0054] refer to Figure 1 and Figure 5 As shown, the grinding motor 4 is fixedly installed on the top of the grinding top seat 2, and the top of the rotating shaft 33 passes through the grinding top seat 2 and is connected to the output shaft of the grinding motor 4 for transmission.

[0055] refer to Figure 2 As shown, the grinding mechanism 5 includes support columns 51 and grinding sand belts 52. There are multiple support columns 51, which are evenly arranged in a semi-circular shape between the grinding base 1 and the grinding top seat 2 along the circumferential direction of the clamping turntable 31. The top and bottom of the support columns 51 are fixedly connected to the grinding top seat 2 and the grinding base 1, respectively. The grinding sand belt 52 is wrapped around the outer wall of the multiple support columns 51, and one side of the outer wall of the grinding sand belt 52 is in contact with the outer wall of the clamping turntable 31.

[0056] When the transformer housing 6 rotates to contact the abrasive belt 52, the abrasive belt 52 applies an external force to the transformer housing 6, causing the transformer housing 6 to move slightly towards the center of the clamping turntable 31 in the radial direction. This movement reduces the friction between the transformer housing 6 and the inner wall of the clamping hole 311, allowing the transformer housing 6 to rotate more smoothly. Furthermore, the abrasive belt 52 can more effectively polish the sidewalls of the transformer housing 6.

[0057] The implementation principle of this invention is as follows: During the grinding process of the transformer housing 6, the transmission slider 3221 is first pushed to slide along the axial direction of the guide post 327 towards the center of the clamping turntable 31. At this time, the transmission slider 3221 will compress the clamping elastic element 3222, and through the connecting slider 322, drive the clamping slider 321 to slide along the radial direction of the clamping turntable 31 towards its center. Next, the transformer housing 6 is placed into the clamping hole 311. Then, the transmission slider 3221 is released. At this time, under the elastic force of the clamping elastic element 3222, the transmission slider 3221 will move in the opposite direction to reset. At the same time, through the connecting slider 322, it drives the clamping slider 321 to slide along the radial direction of the clamping turntable 31 away from the center, thereby pressing the transformer housing 6 into the opening of the clamping hole 311. After that, the clamping turntable 31 is rotated, and the above operation is repeated until all the clamping holes 311 are clamped with transformer housings 6.

[0058] The grinding motor 4 is started, causing it to drive the clamping turntable 31 to rotate via the rotating shaft 33. Simultaneously, as the clamping turntable 31 rotates, the current transformer housing 6 on it also rotates synchronously. The top and bottom ends of the current transformer housing 6 rub against the upper grinding component 21 and the lower grinding component 11, respectively, allowing the upper and lower grinding components 21 and 11 to grind the top and bottom ends of the current transformer housing 6. At the same time, as the clamping turntable 31 rotates, it drives the transmission shaft 324 to rotate synchronously. Since the transmission gear 328 fixedly mounted at the bottom of the transmission shaft 324 meshes with the fixed external gear ring 329 fixedly mounted in the annular groove 12, the transmission gear 328 drives the transmission shaft 324 to rotate under the meshing action of the fixed external gear ring 329. At this time, the transmission shaft 324 drives the current transformer housing 6 to rotate via the transmission belt 326, and the direction of rotation is the same as the direction of rotation of the clamping turntable 31. As the clamping turntable 31 and the transformer housing 6 rotate, the side wall of the transformer housing 6 rubs against the abrasive belt 52, thereby enabling the abrasive belt 52 to perform all-round abrasive polishing on the side wall of the transformer housing 6.

[0059] During the clamping, disassembly, and grinding of the transformer housing 6, the clamping slider 321 moves radially along the clamping turntable 31. When the clamping slider 321 moves away from the drive shaft 324, the drive belt 326 drives the two tensioning columns 3251 closer together. At this time, the two guide sliders 3252 located in the same guide groove 313 move closer together under the action of the two tensioning columns 3251, compressing the tensioning elastic element 3253. When the clamping slider 321 approaches the drive shaft 324, the drive belt 326 no longer applies pressure to the tensioning columns 3251, and the two guide sliders 3252 located in the same guide groove 313 move away from each other under the elastic force of the tensioning elastic element 3253. At the same time, the two tensioning columns 3251 move away from each other synchronously under the drive of the guide slider 3252, thereby tensioning the transmission belt 326 and preventing the transmission belt 326 from coming loose, thus ensuring that it can drive the transformer housing 6 to rotate normally.

[0060] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention.

Claims

1. A device for grinding the housing of a current transformer, comprising a grinding base and a grinding top, characterized in that, A clamping assembly is provided between the grinding base and the grinding top seat. A grinding mechanism is provided on the outside of the clamping assembly. The clamping assembly includes a clamping turntable. A clamping hole extending along its axis is provided at the top edge of the clamping turntable. An opening is provided at the connection between the side wall of the clamping hole and the edge of the clamping turntable. A clamping groove extending radially along the clamping turntable is provided in the middle of the side wall of the clamping hole. A clamping mechanism is provided in the clamping groove. The clamping mechanism includes a clamping slider that slides radially along the clamping turntable. A connecting slider is provided on the side of the clamping slider away from the clamping hole. An adjusting groove is provided on the top of the clamping turntable, extending radially therefrom and communicating with the clamping groove. A guide post with its axis extending radially along the clamping turntable is fixedly installed on the inner wall of the adjusting groove. A transmission slider that is slidably sleeved on the outer wall of the guide post is fixedly installed on the top of the connecting slider. A clamping elastic element that is sleeved on the outer wall of the guide post is fixedly installed between the side of the transmission slider away from the clamping slider and the inner wall of the adjusting groove. The clamping slider has mounting grooves at both ends of the side wall near the clamping hole. Each mounting groove contains a support shaft with an axis parallel to the axis of the clamping turntable. The end of the clamping groove away from the clamping hole is rotatably mounted with a transmission shaft with an axis parallel to the axis of the clamping turntable. A transmission belt is connected between the transmission shaft and the outer wall of the two support shafts. A tensioning element for tensioning the transmission belt is installed at the end of the clamping groove away from the clamping hole. The clamping groove has symmetrical guide grooves on the top and bottom walls of the end away from the clamping hole, which are perpendicular to the direction of movement of the clamping slider. The tensioning element includes four guide sliders, which are slidably installed at both ends of the two guide grooves. A tensioning elastic element is fixedly connected between the two guide sliders in the same guide groove. A tensioning column is fixedly installed between the corresponding guide sliders in the two guide grooves. Both tensioning columns are in contact with the inner wall of the transmission belt. The top wall of the grinding base is provided with an annular groove concentric with it. A fixed external gear ring concentric with it is fixedly installed on the inner wall of the annular groove. The bottom end of the drive shaft passes through the clamping turntable and extends into the annular groove, where a drive gear is fixedly installed. The drive gear meshes with the fixed external gear ring. A lower grinding component is fixedly installed on the top of the grinding base. The lower grinding component is a ring-shaped grinding wheel and is concentrically set with the clamping turntable. The lower grinding component is located below the clamping hole. The grinding top seat is a semi-circular plate and is coaxially set with the clamping turntable. An upper grinding component is fixedly installed at the bottom of the grinding top seat. The upper grinding component is a semi-circular grinding wheel and corresponds to the lower grinding component.

2. The instrument transformer housing grinding device according to claim 1, characterized in that: There are at least two clamping holes, and multiple clamping holes are evenly distributed along the circumference of the clamping turntable.

3. The instrument transformer housing grinding device according to claim 1, characterized in that: The grinding mechanism includes support columns and grinding belts. There are multiple support columns, which are evenly arranged in a semi-circular shape between the grinding base and the grinding top seat along the circumference of the clamping turntable. The top and bottom of the support columns are fixedly connected to the grinding top seat and the grinding base, respectively. The grinding belt is wrapped around the outer wall of the multiple support columns, and one side of the outer wall of the grinding belt is in contact with the outer wall of the clamping turntable.

4. The instrument transformer housing grinding device according to claim 1, characterized in that: A grinding motor is fixedly installed on the top of the grinding base. A rotating shaft coaxial with the clamping turntable is rotatably installed on the bottom of the grinding base. The bottom end of the rotating shaft passes through the clamping turntable and is rotatably connected to the grinding base. The clamping turntable is fixedly connected to the outer wall of the rotating shaft. The top of the rotating shaft passes through the grinding base and is connected to the output shaft of the grinding motor.

5. The instrument for grinding a transformer housing according to claim 2, characterized in that: Both the clamping elastic element and the tensioning elastic element are springs.

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