Resistance element grinding device

Abstract

The utility model relates to resistance sheet grinding technical field especially resistance sheet grinding device, including mounting support and mounting block, the polishing machine for polishing resistance sheet is fixedly installed to the bottom end of mounting block, set up the jacking mechanism for polishing resistance sheet with polishing machine on mounting support, install the turnover mechanism for overturning resistance sheet with jacking mechanism on mounting support. The utility model discloses through the collaborative work of turnover mechanism and jacking mechanism, realizes the full process automation. Can dispense with the manual operation link, helps to improve production efficiency, and the jacking action effectively ensures that the clamping mechanism can reliably clamp resistance sheet in a known, fixed height position, helps to avoid the problem of clamping failure or inaccurate positioning. Effectively guarantee the grinding of resistance sheet two -sided symmetry and even, and improve the size precision and electrical performance consistency of product, and effectively improve its yield.

Description

Technical Field

[0001] This utility model relates to the field of resistor grinding technology, and in particular to a resistor grinding device. Background Technology

[0002] In the process of resistor manufacturing, in order to improve the consistency of its electrical performance and dimensional accuracy, it is usually necessary to perform precision grinding on its upper and lower surfaces.

[0003] Existing methods often employ a resistor grinding device, such as the one disclosed in CN218017841U, which uses a double-layer grinding turntable structure to achieve synchronous grinding of the upper and lower surfaces of the resistor, significantly improving grinding efficiency. However, this solution still has certain limitations: firstly, its clamping of the resistor relies on the cooperation of the positioning hole and the elastic pressure block, which is suitable for batch continuous feeding, but lacks flexibility for the independent processing of a single resistor; secondly, this structure makes it difficult to achieve precise lifting, positioning, and flipping control of the resistor during the grinding process, especially when it is necessary to grind the resistor independently on both sides in sequence, lacking an effective intermediate process connection mechanism. Utility Model Content

[0004] The purpose of this invention is to solve the problems of insufficient symmetry and consistency in grinding and positioning accuracy and damage during the flipping process in the existing technology, and to propose a resistor grinding device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A resistor grinding device includes a mounting bracket and a mounting block. A grinding machine for grinding resistors is fixedly mounted on the bottom end of the mounting block. A lifting mechanism for grinding resistors in conjunction with the grinding machine is provided on the mounting bracket. A flipping mechanism for flipping resistors in conjunction with the lifting mechanism is also provided on the mounting bracket.

[0006] Preferably, the mounting block is an L-shaped block, which is fixedly installed at the top of the mounting bracket, and two sets of mounting blocks are symmetrically arranged with the grinder. An electric telescopic rod is provided between the grinder and the mounting block.

[0007] Preferably, the lifting mechanism includes a rectangular groove at the top of the mounting bracket, a rectangular block is fixedly installed in the rectangular groove, a circular groove is provided in the middle of the rectangular block, a circular support plate for placing the resistor is slidably installed in the circular groove, a rectangular through hole is provided at the bottom of the circular support plate, a wedge-shaped support rod is fixedly installed at the bottom of the circular support plate and slidably connected to the rectangular through hole, and a drive turntable for moving and abutting the wedge-shaped support rod is provided at the bottom of the mounting bracket.

[0008] Preferably, a traction shaft is fixedly installed at the eccentric part of the drive turntable, a vertical slotted block is slidably installed on the traction shaft, limit blocks are symmetrically installed at the bottom of the mounting bracket, and abutment rods that are slidably connected to the limit blocks are fixedly installed on the left and right sides of the vertical slotted block. The abutment rods are in movable contact with the wedge-shaped support rods, and the drive turntable is driven by a second drive motor.

[0009] Preferably, the flipping mechanism includes a guide groove formed at the top of the mounting bracket, a rack plate slidably fitted on the guide groove, a mounting base fixedly mounted on the front side of the top of the mounting bracket, a traction shaft rotatably mounted on the mounting base, a gear sleeve for meshing with the rack plate fixedly mounted at the top of the traction shaft, and a clamping block for clamping the resistor sheet fixedly mounted in the middle of the traction shaft.

[0010] Preferably, the top of the clamping block is provided with a driving link, and the two sides of the driving link are connected to transmission links by pins. The transmission links are connected to clamping arc plates for clamping resistor sheets by pins. The driving link is driven by a first driving motor. The top of the mounting bracket is fixedly installed with a limiting base for rotatably connecting the traction shaft.

[0011] Compared with the prior art, the present invention has the following advantages: 1. This utility model achieves full-process automation through the coordinated operation of a flipping mechanism and a lifting mechanism. Eliminating intermediate manual operations helps improve production efficiency. Simultaneously, the lifting action ensures that the clamping mechanism can reliably grip the resistor sheet at a known, fixed height, helping to avoid problems such as clamping failure or inaccurate positioning. This effectively ensures that the grinding of both sides of the resistor sheet is symmetrical and uniform, improving the dimensional accuracy and electrical performance consistency of the product, and significantly increasing the yield rate.

[0012] 2. This utility model integrates all functional modules—clamping, flipping, supporting, and grinding—on a single mounting bracket. The compact design effectively reduces manufacturing costs and control complexity. Operators only need to load and unload materials; the flipping and grinding processes are fully automated. This reduces the skill requirements for operators, helps minimize quality fluctuations caused by human factors, and improves the working environment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the resistor grinding device proposed in this utility model; Figure 2 This is a schematic diagram of the lifting mechanism of the resistor grinding device proposed in this utility model; Figure 3 This is a schematic diagram of the circular support plate of the resistor grinding device proposed in this utility model; Figure 4This is a schematic diagram of the flipping mechanism of the resistor grinding device proposed in this utility model.

[0014] In the diagram: 1. Mounting bracket; 2. Mounting block; 3. Grinding machine; 4. Tilting mechanism; 41. Guide groove; 42. Rack plate; 43. Traction shaft; 44. Limiting base; 45. Clamping block; 46. Mounting base; 47. Drive linkage; 48. Clamping arc plate; 5. Lifting mechanism; 51. Drive turntable; 52. Traction shaft; 53. Limiting block; 54. Vertical slot hole block; 55. Wedge-shaped support rod; 56. Rectangular block; 57. Circular groove; 58. Circular support plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1-4 The resistor grinding device includes a mounting bracket 1 and a mounting block 2. A grinding machine 3 for grinding resistors is fixedly mounted on the bottom of the mounting block 2. The mounting bracket 1 is provided with a lifting mechanism 5 for grinding resistors in conjunction with the grinding machine 3. The lifting mechanism 5 includes a rectangular groove at the top of the mounting bracket 1. A rectangular block 56 is fixedly mounted in the rectangular groove. A circular groove 57 is provided in the middle of the rectangular block 56. A circular support plate 58 for placing resistors is slidably mounted in the circular groove 57. A rectangular through hole is provided at the bottom of the circular support plate 58. A wedge-shaped support rod 55 that is slidably connected to the rectangular through hole is fixedly mounted at the bottom of the circular support plate 58. A drive turntable 51 for moving and abutting the wedge-shaped support rod 55 is provided at the bottom of the mounting bracket 1.

[0017] The rectangular block 56 and the circular support plate 58 are slidably fitted together. The circular support plate 58 is embedded in the circular groove 57 of the rectangular block 56. The inner wall of the circular groove 57 and the outer wall of the circular support plate 58 are precision ground to ensure that the circular support plate 58 slides smoothly vertically along the circular groove 57 without any jamming. The rectangular through hole at the bottom of the circular support plate 58 is slidably connected to the wedge-shaped support rod 55. The inner wall of the rectangular through hole is provided with a lubrication groove. The wedge-shaped support rod 55 can slide up and down along the rectangular through hole, driving the wedge-shaped support rod 55 to rise and fall synchronously.

[0018] A traction shaft 52 is fixedly installed at the eccentric part of the drive turntable 51. A vertical slot block 54 is slidably installed on the traction shaft 52. Limit blocks 53 are symmetrically installed at the bottom of the mounting bracket 1. Abutment rods that are slidably connected to the limit blocks 53 are fixedly installed on the left and right sides of the vertical slot block 54. The abutment rods are in contact with the wedge-shaped support rod 55. The drive turntable 51 is driven by a second drive motor.

[0019] The drive turntable 51 is eccentrically slidably engaged with the vertical slot block 54. The traction shaft 52 at the eccentric position of the drive turntable 51 is inserted into the vertical slot of the vertical slot block 54. The outer diameter of the traction shaft 52 is fitted with the slot width clearance to ensure that the traction shaft 52 can slide along the slot wall when the drive turntable 51 rotates, thus pushing the vertical slot block 54 to move horizontally. The vertical slotted block 54 is slidably guided to the limiting block 53 and the abutment rod. The abutment rods on the left and right sides of the vertical slotted block 54 pass through the guide holes of the limiting block 53. The guide holes and the abutment rods are clearance-fitted. The limiting block 53 is fixed to the bottom of the mounting bracket 1 by bolts, which restricts the vertical slotted block 54 to move only in the vertical direction and avoids lateral displacement. The top of the abutment rod and the inclined surface of the wedge-shaped support rod 55 are in movable abutment fit. The abutment surface is provided with a wear-resistant coating to reduce the precision loss caused by long-term friction.

[0020] The mounting bracket 1 is equipped with a flipping mechanism 4 for flipping the resistor sheet in conjunction with the lifting mechanism 5. The flipping mechanism 4 includes a guide groove 41 opened at the top of the mounting bracket 1, a rack plate 42 slidably fitted on the guide groove 41, a mounting base 46 fixedly installed at the front of the top of the mounting bracket 1, a traction shaft 43 rotatably installed on the mounting base 46, a gear sleeve for meshing with the rack plate 42 fixedly installed at the top of the traction shaft 43, and a clamping block 45 for clamping the resistor sheet fixedly installed in the middle of the traction shaft 43.

[0021] The guide groove 41 and the rack plate 42 slide together and are laterally limited. The rack plate 42 is embedded in the guide groove 41 at the top of the mounting bracket 1. The guide groove 41 has bosses on both sides. The bosses are clearance-fitted with the side wall of the rack plate 42, which restricts the rack plate 42 to slide horizontally only along the guide groove 41. A lubricating strip is provided at the bottom of the rack plate 42 to reduce the coefficient of sliding friction; the cylinder body of the hydraulic cylinder is fixed to the pre-set support at the top of the mounting bracket 1 by bolts, and the end of the piston rod is hinged to the ear seat of the rack plate 42 by a pin to ensure that the piston rod drives the rack plate 42 to move linearly along the guide groove 41 when it extends and retracts.

[0022] The mounting base 46, the limiting base 44, and the traction shaft 43 are rotatably supported. The lower end of the traction shaft 43 is fitted with the bearing hole of the mounting base 46 through a tapered roller bearing, and the upper end is fitted with the bearing hole of the limiting base 44 through a deep groove ball bearing. Both bearing seats are fixed to the top of the mounting bracket 1 with bolts to ensure smooth rotation of the traction shaft 43. The traction shaft 43 and the gear sleeve are connected by a key and secured with a set screw. The inner wall of the gear sleeve has a keyway. After the key is fitted with the traction shaft 43, the traction shaft 43 is pressed against the side wall of the gear sleeve by the set screw to prevent relative rotation between the gear sleeve and the traction shaft 43, ensuring no power loss when the rack plate 42 meshes with the gear sleeve.

[0023] The top of the clamping block 45 is provided with a drive link 47, and the two sides of the drive link 47 are connected to the transmission link. The transmission link is connected to the clamping arc plate 48 for clamping the resistor sheet. The drive link 47 is driven by the first drive motor. The top of the mounting bracket 1 is fixedly installed with a limiting base 44 for rotatably connecting the traction shaft 43.

[0024] The drive link 47, transmission link, and clamping arc plate 48 are hinged together by pins. The lugs at both ends of the drive link 47 are hinged to one end of the transmission link by cylindrical pins, with the pins and lug holes having clearance fit. The other end of the transmission link is also hinged to the lug of the clamping arc plate 48 by pins. All hinges are equipped with dust covers and grease filling ports to ensure flexible opening and closing of the clamping mechanism. The connection between the first drive motor and the drive link 47: The output shaft of the first drive motor is rigidly connected to one end of the drive link 47 through a reducer. The output shaft of the reducer is connected to the drive link 47 by a key to ensure stable power transmission from the first drive motor to the drive link 47, thereby achieving precise opening and closing of the clamping arc plate 48.

[0025] Mounting block 2 is an L-shaped block, which is fixedly installed at the top of mounting bracket 1 using bolts. Two sets of L-shaped mounting blocks 2 are symmetrically fixed in the pre-set threaded holes at the top of mounting bracket 1 to ensure that the relative position of mounting block 2 and mounting bracket 1 is fixed, preventing positional displacement due to vibration during grinding. Two sets of mounting blocks 2 and grinding machine 3 are symmetrically arranged. An electric telescopic rod is installed between grinding machine 3 and mounting block 2. Both ends of the electric telescopic rod are rigidly connected to the housings of mounting block 2 and grinding machine 3 respectively using flanges. The connection between the output shaft of the electric telescopic rod and grinding machine 3 uses a keyway fit to restrict circumferential rotation. The electric telescopic rod is fitted with a guide sleeve and fixed to the mounting block 2 to ensure that the grinder 3 only moves up and down in the vertical direction, adapting to the grinding needs of resistor sheets of different thicknesses.

[0026] It should be noted that the specific models and specifications of the first drive motor, the second drive motor, and the hydraulic cylinder need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, so they will not be elaborated here.

[0027] The functional principle of this utility model can be explained through the following operation methods: When it is necessary to polish the resistor: First, the operator places the resistor sheet to be ground on the circular support plate 58 of the lifting mechanism 5. Then, the equipment is started, and the grinder 3 moves downward under the drive of the electric telescopic rod to uniformly grind the front side of the resistor sheet.

[0028] Once the front side is polished, start the drive turntable 51 to rotate to a specific position. Through the aforementioned transmission chain, drive the wedge support rod 55 to lift the circular support plate 58 and the resistor sheet upwards, placing them at a preset, fixed height position to prepare for subsequent clamping.

[0029] At the same time, the flipping mechanism 4 then operates. Specifically, the drive linkage 47 at the top of the clamping block 45 moves, driving a pair of clamping arc plates 48 to close via the transmission linkage, thereby accurately and reliably clamping the lifted resistor sheet.

[0030] The hydraulic cylinder is activated, pushing the rack plate 42 horizontally along the guide groove 41, driving the traction shaft 43 to rotate. Then, because the rack plate 42 is engaged with the gear sleeve fixedly mounted on the top of the traction shaft 43, the linear motion of the rack plate 42 is converted into a precise 180-degree rotation of the traction shaft 43. Finally, the traction shaft 43 drives the clamping block 45 and the clamping arc plate 48, as well as the clamped resistor sheet, to flip together, so that the unpolished reverse side faces upward.

[0031] Finally, after the flipping action is completed, the clamping arc plate 48 is released, and the resistor sheet is placed back onto the reset circular support plate 58. Then, the polishing machine 3 presses down again, repeating the above polishing action to polish the reverse side of the resistor sheet. This completes one full double-sided automated polishing cycle.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A resistor grinding apparatus, comprising a mounting bracket (1) and a mounting block (2), characterized in that, The mounting block (2) is fixedly mounted with a grinding machine (3) for grinding the resistor sheet. The mounting bracket (1) is provided with a lifting mechanism (5) for grinding the resistor sheet in conjunction with the grinding machine (3). The mounting bracket (1) is also provided with a flipping mechanism (4) for flipping the resistor sheet in conjunction with the lifting mechanism (5).

2. The resistor grinding apparatus according to claim 1, characterized in that, The mounting block (2) is an L-shaped block. The mounting block (2) is fixedly installed at the top of the mounting bracket (1). Two sets of mounting blocks (2) and the grinder (3) are symmetrically arranged. An electric telescopic rod is provided between the grinder (3) and the mounting block (2).

3. The resistor grinding apparatus according to claim 1, characterized in that, The lifting mechanism (5) includes a rectangular groove at the top of the mounting bracket (1), a rectangular block (56) is fixedly installed in the rectangular groove, a circular groove (57) is provided in the middle of the rectangular block (56), a circular support plate (58) for placing resistors is slidably installed in the circular groove (57), a rectangular through hole is provided at the bottom of the circular support plate (58), a wedge-shaped support rod (55) is fixedly installed at the bottom of the circular support plate (58) and slidably connected to the rectangular through hole, and a drive turntable (51) for moving and abutting the wedge-shaped support rod (55) is provided at the bottom of the mounting bracket (1).

4. The resistor grinding apparatus according to claim 3, characterized in that, The drive turntable (51) is fixedly installed with a traction shaft (52) at its eccentric position. A vertical slot block (54) is slidably installed on the traction shaft (52). Limiting blocks (53) are symmetrically installed at the bottom of the mounting bracket (1). Abutting rods that are slidably connected to the limiting blocks (53) are fixedly installed on the left and right sides of the vertical slot block (54). The abutting rods are in contact with the wedge-shaped support rod (55). The drive turntable (51) is driven by a second drive motor.

5. The resistor grinding apparatus according to claim 1, characterized in that, The flipping mechanism (4) includes a guide groove (41) opened at the top of the mounting bracket (1), a rack plate (42) slidably fitted on the guide groove (41), a mounting base (46) fixedly installed on the front side of the top of the mounting bracket (1), a traction shaft (43) rotatably installed on the mounting base (46), a gear sleeve for meshing with the rack plate (42) fixedly installed at the top of the traction shaft (43), and a clamping block (45) for clamping the resistor sheet fixedly installed in the middle of the traction shaft (43).

6. The resistor grinding apparatus according to claim 5, characterized in that, The clamping block (45) is provided with a driving link (47) at the top. The driving link (47) is connected to a transmission link by pins on both sides. The transmission link is connected to a clamping arc plate (48) for clamping the resistor sheet by pins. The driving link (47) is driven by a first driving motor. The mounting bracket (1) is fixedly installed with a limiting base (44) for rotatably connecting the traction shaft (43) at the top.

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