CN2787962Y

CN2787962Y - Variable resistor protection structure for motor control valve

Info

Publication number: CN2787962Y
Application number: CN 200520000990
Authority: CN
Inventors: 李得昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-18
Filing date: 2005-01-18
Publication date: 2006-06-14
Anticipated expiration: 2015-01-18

Abstract

The utility model discloses a variable resistor protection structure for a motor control valve, which adopts a VR protection shaft fixed seat, a white paper board, a spring shim, a drive gear, a stop screw, a shim, a C-shaped fastening ring, etc. and is arranged on a rotary variable resistor which is not limited by a self-rotation angle by utilizing the embedding mode of friction force between objects. The rotary variable resistor is protected by the gear idling mode of the structure. Thus, precise calculation and special customization are not required for a gear and a gear rack which are matched with the structure. The goals of fabrication cost reduction and work efficiency enhancement are achieved.

Description

The variable resistor protection structure of motor control valve

Technical field

The utility model relates to a kind of variable resistor protection structure of motor control valve; relate in particular to a kind of its constructional device on rotary variable resistor; utilize the chimeric mode of frictional force between object; when operation process, allow driving gear produce idle running; protect rotary variable resistor; reach and reduce fabricating cost and production time, and extensively use in motor driver, mortor operated valve class, pneumatic valve class, driver or other mechanism.

Background technique

Along with electronic technology develops rapidly, make and used many electrical assemblys in the category of Machine Design, from locomotive, automobile, automation equipment to aircraft, though these products are still based on machinery, but use electronics and sensing component invariably in a large number,, our design field is enlarged more because electronics and sensing component have brought many facilities, manyly mechanically reach functions such as high precision and automation, and needed relatively cost, space are all smaller by electrical assembly.

Variable resistor (Variable Resistor in general electrical assembly; VR); be usually used in the adjustment of apparatus error or be used in; the control of pneumatic valve class fluid; driver uses it as sensor; especially often be used with rotary variable resistor; adjust the output resistance size with rotation mode; can reflect sensing thing state by resistance sizes; the control unit real time information is provided; therefore motor control valve uses rotary variable-resistance characteristic to reach the control purpose; because rotary variable resistor pattern; precision and maximum angle of swing; because of the different differences to some extent of production company; wherein with the Different Effects maximum of maximum angle of swing; in order to cooperate the variable resistor angle of swing; often adopt gear in design, arrange in pairs or groups local gear or tooth bar, the therefore number of teeth of the fine and closely woven calculating specific portion wheel and rack of needs; and the difficulty that causes rotary variable resistor collocation part to make increases the waste of fabricating cost and production time relatively.

Comprehensive above-mentioned institute opinion, the structure of the variable resistor of the motor control valve that uses protection at present deficiency has been satisfied with consumer demand now, demands further improvement urgently.

Because the existence of above-mentioned various situations and problem, the inventor amasss in being engaged in the development Experience of relevant industries for many years and studying intensively with great concentration, and integrate the above-mentioned problems such as structure of commonly using, then adopt the chimeric mode of frictional force, the structure of utilizing simple assemblies to be combined into, allow rotary variable resistor not be subjected to angle limits own, and convenient in the mechanical structure utilization.

The model utility content

The purpose of this utility model is; variable resistor protection structure by the utility model motor control valve; adopt the mounting spring pad and cooperate C type clasp; by chimeric its driving gear of pressure spring pad reaction force; when transmitting angle greater than the variable resistor angle of swing; active force that differential seat angle produces then; frictional force greater than its chimeric driving gear; make driving gear produce the idle running mode; eliminate unnecessary differential seat angle, the local wheel and rack of the driving gear of therefore arranging in pairs or groups need not to establish and special customization via the precision meter; only need to use general gear commonly used and tooth bar get final product, allow and use cooperation to reach to reduce cost and promote the work effect.

The utility model is to adopt following technological means to realize;

A kind of variable resistor protection structure of motor control valve; main structure comprises VR protection axle fixed base; compression spring; white board; set screw; pad; formations such as driving gear and C type clasp; wherein: be to protect the axle fixed seating in the rotating shaft that variable resistor revolves VR; adopt the set screw locking; respectively with white board; compression spring; driving gear and pad are inserted on the VR protection axle fixed base; utilize C type clasp to be embedded on the VR protection axle fixed base groove; force and place that compression spring is compressed between blank plate and driving gear; chimeric its driving cog of reaction force when utilizing compression spring by compression; when gear or tooth bar conduction rotation moving range; when surpassing the rotation restriction that variable resistor can bear; gear transmission this moment power then can be greater than the frictional force of chimeric driving gear; force driving gear to produce the idle running phenomenon; consume unnecessary rotating range by the idle running mode, the protection variable resistor.

Aforesaid delicate structure is installed on the rotary variable resistor, can't additionally increase shallow storage space, be suitable for various existing rotary variable-resistance occasions.

Aforesaid this structure is fit to: apply to electric motor actuator, air impeller control in pipeline, the fluid control.

The utility model compared with prior art has remarkable advantages and beneficial effect:

In sum; the variable resistor protection structure of its disclosed motor control valve; mainly utilize the chimeric driving gear of compression spring reaction force to put on the variable resistor running shaft; its driving gear can consume unnecessary transmission power in the rotation mode; and allow collocation gear or tooth bar meticulous design reach special customization, reach the purpose that reduces cost and promote working efficiency.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the utility model structure;

Fig. 2 is the stereogram of the utility model structure;

Fig. 3 is the sectional drawing of the utility model structure;

Fig. 4 is embodiment's schematic representation () of the utility model structure;

Fig. 5 is embodiment's schematic representation (two) of the utility model structure.

Embodiment

Below in conjunction with accompanying drawing embodiment is illustrated:

See also Fig. 1～shown in Figure 5; the utility model is a kind of variable resistor protection structure of motor control valve; its main structure comprises formations such as VR protection axle fixed base 10, compression spring 30, white board 20, set screw 11, pad 50, driving gear 40 and C type clasp 12, wherein:

VR protection axle fixed base 10 is placed in the rotating shaft 60 that variable resistor revolves; adopt set screw 11 lockings; white board 20, compression spring 30, driving gear 40 and pad 50 sides are not inserted on the VR protection axle fixed base 10 respectively; utilize C type clasp 12 to be embedded on the VR protection axle fixed base groove; force to place blank plate 20 and 40 compression springs 30 of driving gear to be compressed chimeric its driving gear 40 of reaction force when utilizing compression spring 30 by compression.

When using variable resistor 60 as sensor, this structure upper transfer gear 40 then, by collocation gear or tooth bar conduction rotary variable resistor 60, by variable resistor 40 self-resistance size variation, be passed to control unit and judge its controlled substance current state, when gear or tooth bar conduction rotation moving range, when surpassing the maximum angle of swing of variable resistor 60, this moment, unnecessary differential seat angle produced the frictional force of active force greater than chimeric driving gear 40, force driving gear 40 to produce the idle running phenomenon, and its variable resistor of unlikely damage, this allows collocation gear or the tooth bar need not the meticulous design number of teeth and special customization, and reaches and reduce cost and promote working efficiency.

This structure is extensively controlled as fluids such as constant temperature, steam, water, air, discharge of wastewater, shunting, components; add to settle on the rotary variable resistor and protect structure; this body structure small occupied space is also little; so be suitable for various existing rotary variable-resistance occasions, therefore can use in pipeline, the fluid control in electric motor actuator, the air impeller control.

It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technological scheme of unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technological scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the claim scope of the present utility model.

Claims

1, a kind of variable resistor of motor control valve protection structure, main structure comprise VR protection axle fixed base, compression spring, white board, set screw, pad, driving gear and C type clasp; It is characterized in that:

VR protection axle fixed seating is adopted the set screw locking in the rotating shaft that variable resistor revolves, respectively white board, compression spring, driving gear and pad are inserted on the VR protection axle fixed base, C type clasp is embedded on the VR protection axle fixed base groove.

2, the variable resistor of motor control valve according to claim 1 protection structure is characterized in that this structure is installed on the rotary variable resistor, is suitable for various rotary variable resistors.