Floating potentiometer structure

Abstract

The utility model discloses a floating potentiometer structure, which comprises a pillar, a support, a potentiometer, a worm wheel shaft, a gear set and a torsion spring, the support is respectively connected with the pillar and the potentiometer, the support can radially rotate relative to the pillar, the torsion spring is connected between the support and the pillar, and the worm wheel shaft is arranged on the support. The potentiometer and the worm wheel shaft are in transmission connection through the gear set. Force can be preset for the gears through the torsion spring, a gap between the first gear and the second gear is eliminated, the situation that the gears are tightly ejected due to eccentricity of the gears is prevented, the current position is fed back more accurately, and the preset force requirement can be met by adjusting the compression ratio.

Description

Technical Field

[0001] The utility model relates to the technical field of electric valve equipment, in particular to a floating potentiometer structure. Background Art

[0002] The potentiometer is an important component for the electric valve to achieve opening adjustment. In the control system of the electric valve, the potentiometer can change the resistance value, thereby changing the valve opening. However, the existing electric valve has the following disadvantages: there is a gear gap between the worm shaft gear and the potentiometer gear, resulting in an error in the valve opening; or, in order to reduce the gear gap and shorten the center distance between the worm shaft gear and the potentiometer gear, the gear meshing is too tight and the gear jam occurs. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a floating potentiometer structure that can provide a preload force to the gear through a torsion spring, eliminate the gap between the first gear and the second gear, prevent the gear from being stuck due to gear eccentricity, more accurately feedback the current position, and adjust the compression ratio to achieve the preload force requirement.

[0004] The utility model is realized through the following technical scheme: a floating potentiometer structure, including a pillar, a bracket, a potentiometer, a worm gear shaft, a gear set, and a torsion spring, wherein the bracket is respectively connected to the pillar and the potentiometer, and the bracket can rotate radially relative to the pillar, the torsion spring is connected between the bracket and the pillar, and the potentiometer and the worm gear shaft are connected through the gear set.

[0005] Furthermore: the bracket is provided with a first through hole and a second through hole, the top end surface of the pillar is provided with a connecting column, the bracket is sleeved on the potentiometer through the first through hole, and the bracket is sleeved on the connecting column through the second through hole, and the bracket can rotate radially relative to the connecting column.

[0006] Furthermore: a fixing through hole is provided on the bracket, a mounting through hole is provided on the top surface of the pillar, the torsion spring is sleeved on the connecting column, and the torsion spring is located below the bracket, one end of the torsion spring is fixed in the fixing through hole, and the other end of the torsion spring is fixed in the mounting through hole.

[0007] Furthermore, the gear set includes a first gear and a second gear meshing with each other, the first gear is sleeved on the potentiometer, and the second gear is sleeved on the worm gear shaft.

[0008] Furthermore: it also includes a bolt, the connecting column is provided with a connecting through hole arranged along its axial direction, the support column is provided with a limiting through hole arranged along its axial direction, and the bolt passes through the connecting through hole and the limiting through hole in sequence to fix the support column on the base plate.

[0009] Furthermore: a gasket is sleeved on the bolt, and the gasket is located on the bracket.

[0010] Furthermore: the connecting column and the supporting column are an integrally formed structure, and the supporting column is in the shape of a hexagonal column.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The pillar is fixed to the base plate by bolts and gaskets, and the bracket is connected to the pillar and the potentiometer respectively, and the bracket can rotate radially about the connecting column on the pillar, the first gear is mounted on the potentiometer, the second gear is mounted on the worm shaft, the first gear and the second gear are meshed with each other, the torsion spring is mounted on the connecting column, and one end of the torsion spring is fixed to the bracket, and the other end of the torsion spring is fixed to the pillar. When the worm shaft rotates, the worm shaft drives the second gear to drive the first gear to rotate, and the first gear drives the potentiometer to rotate. The rotation angle of the worm wheel is determined by the resistance value of the potentiometer, and the torsion spring is used to pre-set force to the gear to eliminate the dead gear caused by the eccentric gear, eliminate the gap between the first gear and the second gear, and more accurately feedback the current position. The preload force can be adjusted by rotating the pillar. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0014] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0015] Figure 3 It is a schematic diagram of the structural decomposition of the utility model.

[0016] Explanation of the reference numerals: 1-pillar, 2-bracket, 3-potentiometer, 4-worm gear shaft, 5-gear set, 6-torsion spring, 7-first through hole, 8-second through hole, 9-connecting column, 10-fixing through hole, 11-installing through hole, 12-first gear, 13-second gear, 14-bolt, 15-connecting through hole, 16-base plate, 17-gasket. DETAILED DESCRIPTION

[0017] Figures 1 to 3A schematic diagram of a floating potentiometer structure embodiment provided by the utility model includes a support 1, a bracket 2, a potentiometer 3, a worm gear shaft 4, a gear set 5, and a torsion spring 6. The bracket 2 is connected to the support 1 and the potentiometer 3 respectively, and the bracket 2 can rotate radially relative to the support 1. A torsion spring 6 is connected between the bracket 2 and the support 1, and the potentiometer 3 and the worm gear shaft 4 are connected through a gear set 5.

[0018] The bracket 2 is provided with a first through hole 7 and a second through hole 8, and a connecting column 9 is provided on the top surface of the pillar 1. The bracket 2 is mounted on the potentiometer 3 through the first through hole 7, and the bracket 2 is mounted on the connecting column 9 through the second through hole 8. The bracket 2 can rotate radially relative to the connecting column 9.

[0019] A fixing through hole 10 is provided on the bracket 2, and a mounting through hole 11 is provided on the top surface of the pillar 1. The torsion spring 6 is sleeved on the connecting column 9, and the torsion spring 6 is located below the bracket 2. One end of the torsion spring 6 is fixed in the fixing through hole 10, and the other end of the torsion spring 6 is fixed in the mounting through hole 11.

[0020] The gear set 5 includes a first gear 12 and a second gear 13 meshing with each other. The first gear 12 is mounted on the potentiometer 3 , and the second gear 13 is mounted on the worm gear shaft 4 .

[0021] It also includes bolts 14. The connecting column 9 is provided with a connecting through hole 15 arranged along its axial direction, and the support column 1 is provided with a limiting through hole arranged along its axial direction. The bolts 14 pass through the connecting through hole 15 and the limiting through hole in sequence to fix the support column 1 on the base plate 16.

[0022] A gasket 17 is sleeved on the bolt 14 , and the gasket 17 is located on the bracket 2 .

[0023] The connecting column 9 and the supporting column 1 are an integrally formed structure, and the supporting column 1 is in the shape of a hexagonal column.

[0024] During operation, the worm shaft 4 rotates, driving the second gear 13 to rotate, and the second gear 13 drives the first gear 12 to drive the potentiometer 3 to rotate, and the rotation angle of the worm gear is determined by the change in the resistance value of the potentiometer 3. By arranging a torsion spring 6 on the independent connecting column 9, one end of the torsion spring 6 is fixed to the support 1, and the other end of the torsion spring 6 is fixed to the bracket 2, and the torsion spring 6 is used to pre-set the force to the gear set 5, eliminating the eccentric gear stuck to the gear, eliminating the gap between the first gear 12 and the second gear 13, and more accurately feeding back the current position, and by loosening the bolt 14, the support 1 can be rotated, and by rotating the support 1, the compression ratio of the torsion spring 6 can be adjusted, and the preload force can be adjusted by adjusting the compression ratio of the torsion spring 6.

[0025] The above detailed description is a specific description of a feasible embodiment of the utility model. The embodiment is not intended to limit the patent scope of the utility model. Any equivalent implementation or modification that does not deviate from the utility model should be included in the patent scope of this case.

Claims

1. A floating potentiometer structure, characterized in that: It includes a pillar, a bracket, a potentiometer, a worm gear shaft, a gear set, and a torsion spring. The bracket is connected to the pillar and the potentiometer respectively, and the bracket can rotate radially relative to the pillar. The torsion spring is connected between the bracket and the pillar, and the potentiometer and the worm gear shaft are connected through the gear set.

2. A floating potentiometer structure according to claim 1, characterized in that: The bracket is provided with a first through hole and a second through hole, and a connecting column is provided on the top end surface of the pillar. The bracket is sleeved on the potentiometer through the first through hole, and the bracket is sleeved on the connecting column through the second through hole. The bracket can rotate radially relative to the connecting column.

3. A floating potentiometer structure according to claim 2, characterized in that: The bracket is provided with a fixing through hole, the top surface of the pillar is provided with an installation through hole, the torsion spring is sleeved on the connecting column, and the torsion spring is located below the bracket, one end of the torsion spring is fixed in the fixing through hole, and the other end of the torsion spring is fixed in the installation through hole.

4. A floating potentiometer structure according to claim 3, characterized in that: The gear set comprises a first gear and a second gear meshing with each other, the first gear is sleeved on the potentiometer, and the second gear is sleeved on the worm gear shaft.

5. The floating potentiometer structure according to claim 3, characterized in that: It also includes bolts, the connecting column is provided with a connecting through hole arranged along its axial direction, the pillar is provided with a limiting through hole arranged along its axial direction, and the bolts penetrate the connecting through hole and the limiting through hole in sequence to fix the pillar on the base plate.

6. A floating potentiometer structure according to claim 5, characterized in that: A gasket is sleeved on the bolt, and the gasket is located on the bracket.

7. A floating potentiometer structure according to claim 6, characterized in that: The connecting column and the supporting column are an integrally formed structure, and the supporting column is in a hexagonal column shape.

Images