Electromagnetic instrument tension wire supporting gauge outfit

Abstract

An electromagnetic instrument tension wire supporting gauge outfit comprises a cross beam assembly which comprises a cross beam, the midpoint of the cross beam is upwards connected with an adjusting piece, the top of the adjusting piece is connected with an upper reed in a clamped mode, and the upper reed is connected with an upper tension wire; the bottom of a support is connected with a round sleeve, and the top of the round sleeve is connected with a lower reed in a clamped mode. The rotating shaft assembly is sleeved with an inner cavity of the support, penetrates through the stator assembly and is connected with the beam assembly, the rotating shaft assembly comprises a rotating shaft, an upper supporting piece, a pointer and a lower supporting piece, a movable piece is arranged on the rotating shaft and axially moves relative to the stator assembly when rotating along with the rotating shaft, the top of the rotating shaft is connected with the upper supporting piece, and the upper supporting piece is welded to the upper tensioning wire. The upper tensioning wire upwards penetrates through the cross beam to be connected with the upper reed, the lower supporting piece arranged at the bottom of the rotating shaft is welded to the lower tensioning wire, and the lower tensioning wire penetrates through the lower supporting piece to be connected with the lower reed. According to the scheme, on the premise that an existing instrument head body component is not changed, a shaft tip, bearing and hairspring supporting structure is replaced by the tensioning wire supporting structure, so that the instrument cost is reduced, the friction influence is eliminated, and the quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic instruments, in particular to an electromagnetic instrument tension wire support meter head. Background Art

[0002] The rotating shaft of the electromagnetic instrument head is usually supported by bearings to ensure the stability and accuracy of rotation. Common support methods include rolling bearings, sliding bearings and magnetic suspension technology.

[0003] Rolling bearings usually use balls or rollers, can withstand large axial and radial loads, have high rotation accuracy and life, and are often used in the rotating shafts of electromagnetic instrument heads that require higher precision.

[0004] Sliding bearings use lubricants or solid lubricating materials, which can provide good support and friction reduction functions at lower speeds and medium and low loads.

[0005] In addition, some high-end electromagnetic instrument heads also use magnetic levitation technology, using a magnetic field to suspend the shaft in the air, thereby eliminating contact friction and improving the stability and accuracy of rotation. However, this method is generally only used in laboratories or high-end production, and is not used in general production due to cost constraints.

[0006] In actual production and use, the current support method for the rotating shaft of the electromagnetic instrument head is mostly composed of three precision components: "upper and lower shaft tips, bearings, and hairsprings". This rotating shaft support method has a complex structure and high cost. In addition, during the use, transportation, and manufacturing of the instrument, the movable part is subject to external forces, and there is friction and wear between the shaft tip and the bearing. Utility Model Content

[0007] To solve the above problems, the utility model proposes an electromagnetic instrument tension wire support meter head. Without changing the main components of the existing instrument head, a tension wire support structure is used to replace the shaft tip, bearing, and hairspring support structure to reduce the instrument cost, eliminate the influence of friction, and improve the quality.

[0008] In order to achieve the above-mentioned purpose, the utility model provides an electromagnetic instrument tension wire support meter head, comprising:

[0009] A crossbeam assembly, the crossbeam assembly comprising a crossbeam, the midpoint of the crossbeam is connected upwardly to the adjustment member, the top of the adjustment member is clamped with an upper spring leaf, and the upper spring leaf is connected to an upper tension wire;

[0010] A bracket assembly, the bracket assembly is connected to the bottom of the cross beam, the bracket assembly includes a bracket and a stator assembly clamped in the inner cavity of the bracket, the bottom of the bracket is connected to a round sleeve, and the top of the round sleeve is clamped with a lower spring leaf;

[0011] The rotating shaft assembly is sleeved in the inner cavity of the bracket and passes through the fixed plate assembly and is connected with the cross beam assembly. The rotating shaft assembly includes a rotating shaft, an upper support, a pointer, and a lower support. The rotating shaft is provided with a moving plate. When the moving plate rotates with the rotating shaft, the moving plate makes axial movement relative to the fixed plate assembly. The top of the rotating shaft is connected to the upper support, and the upper support is welded to the upper tension wire. The upper tension wire passes upward through the cross beam and is connected to the upper spring leaf. The lower support arranged at the bottom of the rotating shaft is welded to the lower tension wire, and the lower tension wire passes through the lower support and is connected to the lower spring leaf.

[0012] As a preferred embodiment of the present technical solution, a first deformation buckle protruding upward is provided on the central axis of the crossbeam, the first deformation buckle is upwardly connected to an adjustment arm, the upper part of the adjustment arm is downwardly recessed and provided with a first slot, the upper spring leaf includes a radially protruding first stem position, the first stem position is clamped in the first slot and fixedly connected to the first slot, the upper spring leaf extends toward the axis and is provided with a first arc welding tongue bent upward, and the upper tension wire is welded and fixed to the first arc welding tongue.

[0013] As a preferred embodiment of the present technical solution, a second deformable buckle protruding downward is provided on the central axis of the bracket, the second deformable buckle is downwardly connected to a round sleeve, the round sleeve is upwardly recessed and provided with a second slot, the lower spring leaf is clamped in the second slot, the lower spring leaf is provided with a radially protruding second stem position corresponding to the second slot, the lower spring leaf extends toward the axis and is provided with a second arc welding tongue bent downward, and the lower tension wire is welded and fixed to the second arc welding tongue.

[0014] As a preferred embodiment of the present technical solution, the stator assembly includes an adjusting gear and a stator, the stator and the adjusting gear are fixedly connected, the thickness of the adjusting gear matches the setting of the concave assembly portion, the top of the bracket is recessed downward to form the concave assembly portion, the concave assembly portion is provided with a pair of clamping blocks corresponding to the adjusting gear, the adjusting gear is clamped between the concave assembly portion and the clamping block, the adjusting gear is provided with teeth, and the adjusting gear can rotate around the axis relative to the bracket.

[0015] As a preferred embodiment of the present technical solution, the upper support member and the lower support member are respectively connected to the upper and lower ends of the rotating shaft, the rotating shaft protrudes upwardly with a first boss for plugging with the upper support member, and the rotating shaft protrudes downwardly with a second boss for plugging with the lower support member.

[0016] As a preferred embodiment of the present technical solution, a first limiting groove is provided at the upper end of the rotating shaft;

[0017] A second limiting groove is provided at the lower end of the rotating shaft.

[0018] As a preferred embodiment of the present technical solution, the upper tensioning wire and the lower tensioning wire are flat belt-shaped tensioning wires.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model sets a crossbeam assembly, a bracket assembly and a rotating shaft assembly to cooperate with each other without changing the main components of the existing instrument head. The crossbeam assembly is welded to the upper support of the rotating shaft by an upper tensioning wire and passes through an upper spring sheet to be tensioned by the upper spring sheet, so as to achieve a supporting connection between the crossbeam assembly and the upper end of the rotating shaft assembly. The lower tensioning wire is welded to the lower support of the rotating shaft and passes through a lower spring sheet to be tensioned by the lower spring sheet, so as to achieve a supporting connection between the bracket assembly and the lower end of the rotating shaft assembly. The shaft tip, bearing and hairspring supporting structure are replaced by the tensioning wire supporting structure, so as to reduce the cost of the instrument, eliminate the influence of friction and improve the quality.

[0021] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a three-dimensional structural schematic diagram of a tension wire support meter head of an electromagnetic instrument.

[0023] Figure 2 The utility model is a three-dimensional structural schematic diagram of a crossbeam component in a tension wire support meter head of an electromagnetic instrument.

[0024] Figure 3 The utility model is a three-dimensional structural schematic diagram of a cross beam in a tension wire support meter head of an electromagnetic instrument.

[0025] Figure 4 The utility model is a three-dimensional structural schematic diagram of a bracket component in a tension wire support meter head of an electromagnetic instrument.

[0026] Figure 5 It is a schematic diagram of a bracket assembly in a tension wire support meter head of an electromagnetic instrument of the utility model under another viewing angle.

[0027] Figure 6 The utility model is a three-dimensional structural schematic diagram of a rotating shaft assembly in a tensioning wire support meter head of an electromagnetic instrument.

[0028] Figure 7 It is a schematic diagram of a rotating shaft assembly in a tensioning wire support meter head of an electromagnetic instrument of the utility model under another viewing angle.

[0029] Figure 8 The utility model is a schematic diagram of a bracket assembly in a tension wire support meter head of an electromagnetic instrument after removing a round sleeve and a lower spring sheet from another viewing angle.

[0030] In the figure: 1, upper spring; 101, first stem position; 102, first arc welding tongue; 2, lower spring; 201, second stem position; 202, second arc welding tongue; 3, adjustment member; 301, adjustment arm; 3011, first slot; 4, round sleeve; 401, second slot; 5, crossbeam; 501, first deformation buckle; 6, pointer; 7, upper support member; 702, first limit slot; 8, lower support Part; 802, second limiting groove; 9, moving plate; 10, rotating shaft; 1001, first boss; 1002, second boss; 11, fixed plate assembly; 1101, adjusting gear; 1102, fixed plate; 12, bracket; 1202, concave assembly portion; 1203, pressing block; 13, upper tension wire; 14, lower tension wire; 15, balance hammer; 16, screw; 17, bracket assembly; 18, second buckle. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the following.

[0032] Unlike the current electromagnetic instrument head shaft support method that mostly uses "upper and lower shaft tips, bearings, and hairsprings" as three precision components to form the shaft support structure, the technical solution of this application does not have a shaft tip bearing structure, so there is no wear; and because the cost is reduced after replacing it with injection molded parts and tension wires, it solves the problem that the shaft tip bearing is a precision part with high cost and high assembly requirements. In the technical solution of this application, the upper and lower tension wires replace the upper and lower bearings. The tension wires make the shaft assembly suspended in the tensioned state. When current flows through the coil, the moving and fixed plates are magnetized, and the magnetism repels each other, achieving the same function as the shaft support method composed of the three precision components of "upper and lower shaft tips, bearings, and hairsprings".

[0033] Reference Figure 1-7 The electromagnetic instrument tension wire support meter head shown includes:

[0034] The crossbeam assembly includes a crossbeam 5, the midpoint of the crossbeam 5 is connected to the adjustment member 3 upward, the top of the adjustment member 3 is clamped with an upper spring 1, the upper spring 1 is connected to the upper tension wire 13, and the upper spring 1 is used to weld and tighten with the upper tension wire 13, so that the shaft assembly can be better rotated in the bracket assembly 17;

[0035] The bracket assembly 17 is connected to the bottom of the crossbeam 5. The bracket assembly 17 includes a bracket 12 and a stator assembly 11 clamped in the inner cavity of the bracket 12. The bottom of the bracket 12 is connected to the round sleeve 4. The top of the round sleeve 4 clamps the lower spring 2. The lower spring 2 is connected to the lower tension wire 14. The lower spring 2 is used to weld and tighten with the lower tension wire 14, so that the shaft assembly can be better rotated in the bracket assembly 17.

[0036] The rotating shaft assembly is sleeved in the inner cavity of the bracket 12 and passes through the stator assembly 11 and is connected to the crossbeam assembly. The rotating shaft assembly includes a rotating shaft 10, an upper support member 7, a pointer 6, and a lower support member 8. A movable plate 9 is provided on the rotating shaft 10. When the movable plate 9 rotates with the rotating shaft 10, it makes axial movement relative to the stator assembly 11. The top of the rotating shaft 10 is connected to the upper support member 7, and the upper support member 7 is welded to the upper tension wire 13. The upper tension wire 13 passes upward through the crossbeam 5 and is connected to the upper spring leaf 1. The lower support member 8 provided at the bottom of the rotating shaft 10 is welded to the lower tension wire 14. The lower tension wire 14 passes through the lower support member 8 and is connected to the lower spring leaf 2. The lower spring leaf 2 is used for welding and tightening the lower tension wire 14.

[0037] The utility model sets a crossbeam assembly, a bracket assembly 17 and a rotating shaft assembly to cooperate with each other without changing the main components of the existing instrument head. The upper tension wire 13 is welded to the rotating shaft 10 and passes through the upper spring leaf 1 to be tensioned by the upper spring leaf 1, so as to realize the support connection between the crossbeam assembly and the upper end of the rotating shaft assembly. The lower tension wire 14 is welded to the rotating shaft 10 and passes through the lower spring leaf 2 to be tensioned by the lower spring leaf 2, so as to realize the support connection between the bracket assembly 17 and the lower end of the rotating shaft assembly. The tension wire support structure replaces the shaft tip, bearing and hairspring support structure, so as to reduce the instrument cost, eliminate the influence of friction and improve the quality.

[0038] A first deformation buckle 501 protruding upward is provided on the central axis of the crossbeam 5, and the first deformation buckle 501 is a petal-shaped buckle. The first deformation buckle 501 is upwardly connected to the adjustment arm 301, and the upper part of the adjustment arm 301 is downwardly recessed and provided with a first slot 3011. The upper spring leaf 1 includes a radially protruding first stem position 101, and the first stem position 101 is clamped in the first slot 3011 and fixedly connected to the first slot 3011. The upper spring leaf 1 extends toward the axis and is provided with a first arc welding tongue 102 bent upward, and the upper tension wire 13 is welded and fixed to the first arc welding tongue 102.

[0039] A second deformable buckle 18 protruding downward is provided on the central axis of the bracket 12, and the second deformable buckle 18 is a petal-shaped buckle. The second deformable buckle 18 is downwardly connected to the circular sleeve 4, and the circular sleeve 4 is upwardly recessed and provided with a second slot 401. The lower spring leaf 2 is clamped in the second slot 401, and the lower spring leaf 2 is provided with a radially protruding second stem position 201 corresponding to the second slot 401. The lower spring leaf 2 extends toward the axis and is provided with a downwardly bent second arc welding tongue 202, and the lower tension wire 14 is welded and fixed to the second arc welding tongue 202.

[0040] The stator assembly 11 includes an adjusting gear 1101 and a stator 1102. The stator 1102 and the adjusting gear 1101 are fixedly connected. The thickness of the adjusting gear 1101 matches the setting of the concave assembly portion 1202. The top of the bracket 12 is recessed downward to form the concave assembly portion 1202. The concave assembly portion 1202 is provided with a pair of clamping blocks 1203 corresponding to the adjusting gear 1101. The adjusting gear 1101 is clamped between the concave assembly portion 1202 and the clamping block 1203. The adjusting gear 1101 is provided with teeth, and the adjusting gear 1101 can rotate around the axis relative to the bracket 12.

[0041] The upper support member 7 and the lower support member 8 are respectively connected to the upper and lower ends of the rotating shaft 10. The rotating shaft 10 protrudes upward and is provided with a first boss 1001 for plugging with the upper support member 7. The rotating shaft 10 protrudes downward and is provided with a second boss 1002 for plugging with the lower support member 8.

[0042] The upper end of the upper support member 7 is provided with a hole for allowing the upper tension wire 13 to pass through, wherein the hole cannot be seen from the angle in the figure, and the first limiting groove 702 is used to ensure that the upper tension wire 13 is located at the central axis of the rotating shaft 10 after being fixed;

[0043] A hole is provided at the lower end of the lower support member 8 for allowing the lower tension wire 14 to pass through, wherein the hole cannot be seen from the angle in the figure, and the second limiting groove 802 is used to ensure that the lower tension wire 14 is located on the central axis of the rotating shaft 10 after being fixed.

[0044] The upper tension wire 13 and the lower tension wire 14 are flat belt-shaped tension wires.

[0045] The actual usage steps are:

[0046] like Figure 2 As shown, the crossbeam 5 presses the adjusting member 3 by means of a petal-shaped buckle, and the upper spring leaf 1 is installed into the adjusting member 3 and fixed by glue.

[0047] like Figure 4 , Figure 5 As shown, the bracket 12 presses the circular sleeve 4 through the first deformation buckle 501, the lower spring leaf 2 is installed into the circular sleeve 4 and fixed by glue, and the fixed sheet assembly 11 is pushed in along the flat groove of the bracket 12.

[0048] like Figure 1 , Figure 6 , Figure 7 As shown, the movable plate 9 is inserted into the narrow groove of the rotating shaft 10 and fixed, and the upper support member 7 welded with the upper tension wire 13 and the lower support member 8 welded with the lower tension wire 14 are respectively installed. The upper tension wire 13 extends out along the first limit groove 702. After being installed in place, the first boss 1001 is melted by hot riveting to fix the upper support member 7. The lower tension wire 14 extends out along the second limit groove 802. After being installed in place, the second boss 1002 is melted by hot riveting to fix the lower support member 8, and then the pointer 6 is installed.

[0049] like Figure 1 As shown, the crossbeam assembly is installed into the bracket assembly 17 and locked with the screw 16, the unwelded end of the upper tension wire 13 passes through the bracket 12 and the crossbeam 5, the position of the rotating shaft assembly is adjusted, the upper tension wire 13 is tightened and welded to the upper spring leaf 1, and the upper tension wire 13 is in a tensioned state under the elastic force of the upper spring leaf 1; the unwelded end of the lower tension wire 14 passes through the bracket 12 and the round sleeve 4, the position of the rotating shaft assembly is adjusted, the lower tension wire 14 is tightened and welded to the lower spring leaf 2, and the lower tension wire 14 is in a tensioned state under the elastic force of the lower spring leaf 2.

[0050] The working principle of the utility model is that when the current to be measured passes through the meter coil, the moving piece 9 and the fixed piece 1102 are magnetized, and the polarities of the two repel each other to generate a rotational torque, and the upper tension wire 13 and the lower tension wire 14 are twisted to generate a reaction torque. When the torques of the two reach a relative balance, the corresponding value is indicated on the dial according to the size of the pointer deflection angle, and the measurement task is completed. In terms of its function, it is basically the same as the shaft tip, bearing, and hairspring support structure.

[0051] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An electromagnetic instrument tension wire support meter head, characterized in that: include: A crossbeam assembly, the crossbeam assembly comprising a crossbeam, the midpoint of the crossbeam is connected upwardly to the adjustment member, the top of the adjustment member is clamped with an upper spring leaf, and the upper spring leaf is connected to an upper tension wire; A bracket assembly, the bracket assembly is connected to the bottom of the cross beam, the bracket assembly includes a bracket and a stator assembly clamped in the inner cavity of the bracket, the bottom of the bracket is connected to a round sleeve, and the top of the round sleeve is clamped with a lower spring leaf; The rotating shaft assembly is sleeved in the inner cavity of the bracket and passes through the fixed plate assembly and is connected with the cross beam assembly. The rotating shaft assembly includes a rotating shaft, an upper support, a pointer, and a lower support. The rotating shaft is provided with a moving plate. When the moving plate rotates with the rotating shaft, the moving plate makes axial movement relative to the fixed plate assembly. The top of the rotating shaft is connected to the upper support, and the upper support is welded to the upper tension wire. The upper tension wire passes upward through the cross beam and is connected to the upper spring leaf. The lower support arranged at the bottom of the rotating shaft is welded to the lower tension wire, and the lower tension wire passes through the lower support and is connected to the lower spring leaf.

2. The electromagnetic instrument tension wire support meter head according to claim 1, characterized in that: A first deformation buckle protruding upward is provided on the central axis of the crossbeam, and the first deformation buckle is connected upward to an adjustment arm. The upper part of the adjustment arm is recessed downward to provide a first slot. The upper spring sheet includes a radially protruding first stem position, and the first stem position is clamped in the first slot and fixedly connected to the first slot. The upper spring sheet extends toward the axis and is provided with a first arc welding tongue bent upward, and the upper tension wire is welded and fixed to the first arc welding tongue.

3. The electromagnetic instrument tension wire support meter head according to claim 2, characterized in that: A second deformable buckle protruding downward is provided on the central axis of the bracket, the second deformable buckle is connected downward to a round sleeve, the round sleeve is recessed upward and provided with a second slot, the lower spring leaf is clamped in the second slot, the lower spring leaf is provided with a radially protruding second stem position corresponding to the second slot, the lower spring leaf extends toward the axis and is provided with a second arc welding tongue bent downward, the lower tension wire is welded and fixed to the second arc welding tongue.

4. The electromagnetic instrument tension wire support meter head according to claim 3, characterized in that: The stator assembly includes an adjusting gear and a stator. The stator and the adjusting gear are fixedly connected. The thickness of the adjusting gear matches the setting of the concave assembly portion. The top of the bracket is recessed downward to form the concave assembly portion. The concave assembly portion is provided with a pair of clamping blocks corresponding to the adjusting gear. The adjusting gear is clamped between the concave assembly portion and the clamping blocks. The adjusting gear is provided with teeth, and the adjusting gear can rotate around the axis relative to the bracket.

5. The electromagnetic instrument tension wire support meter head according to claim 4, characterized in that: The upper support member and the lower support member are connected to the upper and lower ends of the rotating shaft respectively. The rotating shaft protrudes upward to provide a first boss for plugging with the upper support member, and the rotating shaft protrudes downward to provide a second boss for plugging with the lower support member.

6. The electromagnetic instrument tension wire support meter head according to claim 5, characterized in that: The upper end of the rotating shaft is provided with a first limiting groove; A second limiting groove is provided at the lower end of the rotating shaft.

7. The electromagnetic instrument tension wire support meter head according to claim 1, characterized in that: The upper tensioning wire and the lower tensioning wire are flat belt-shaped tensioning wires.

Images