CN202301814U

CN202301814U - Contact piece assembly

Info

Publication number: CN202301814U
Application number: CN201120420898XU
Authority: CN
Inventors: 苏伟东; 游军
Original assignee: Chongqing Chuanyi Automation Co Ltd
Current assignee: Chongqing Chuanyi Automation Co Ltd
Priority date: 2011-10-29
Filing date: 2011-10-29
Publication date: 2012-07-04
Anticipated expiration: 2021-10-29

Abstract

The utility model discloses a contact piece assembly which comprises a fixed plate, a driving friction disc, a driving gear, a driven gear, a gear wheel shaft, a contact piece and an output shaft, wherein the driving gear is connected with the fixed plate in a rotation manner through unidirection of the gear wheel shaft; the contact piece is fixedly arranged on ends of the driving gear and the gear wheel shaft and presses the driving friction disc to be used for transferring torque of the driving friction disc so as to drive the driving gear to rotate; and the unidirection of the output shaft is connected with the fixed plate in a rotation manner, and the driven gear is arranged on the output shaft and is meshed with the driving gear so as to be used for driving the output shaft to rotate. The contact piece assembly provided by the utility model has small mechanical clearance, a double on-off structure is adopted, so that control accuracy on a rotating potentiometer can be improved, and security protection performance is more reliable.

Description

The contact disk assembly

Technical field

The utility model relates to a kind of mechanical driving, relates in particular to a kind of contact disk assembly.

Background technique

A kind of resistance of potentiometer formula can be by the resistive element of certain Changing Pattern adjusting; Comprise more kinds such as slide potentiometer, rotational potentiometer; Wherein rotational potentiometer little with its structure, be convenient to superior function such as automatically control and be widely used; Rotational potentiometer normally drives its rotating part rotation and realizes the control to him according to the feedback information that transmission part showed through contact chip transmitting assemblies; When rotating part goes to limit position; The secondary part and the corresponding transmission part of contact chip transmitting assemblies make frictional fit between secondary part and the active part because of receiving the resistance stop motion, stop the transmission of rotational motion, and the protection rotational potentiometer is not damaged; But in the existing technology between the active part of contact chip transmitting assemblies and the secondary part big, the frictional force of mechanical clearance be not easy control, problem such as cause the control accuracy of rotational potentiometer low, to damage.

Therefore, need a kind of novel contact disk assembly, to improve to the control accuracy of rotational potentiometer and the reliability of safety protection.

The model utility content

In view of this, the purpose of the utility model provides that a kind of mechanical clearance is little, the reliable contact disk assembly of protective value, can improve the control accuracy to rotational potentiometer.

The contact disk assembly of the utility model comprises fixed plate, drives friction disk, driving gear, driven gear, gear shaft, contact disk and output shaft; Said driving gear is rotationally connected with fixed plate through said gear shaft single-degree-of-freedom, and said contact disk is fixedly set in the end of driving gear and gear shaft and is pressed on and drives torque and then the rotation of drive driving gear that friction disk is used to transmit the driving friction disk; Said output shaft single-degree-of-freedom is rotationally connected with fixed plate; Said driven gear is arranged on the output shaft and is used to drive output shaft with the driving gear engagement and rotates.

Further; Said driven gear is connected in output shaft through lining and hold down gag; Said lining is fixed in output shaft end through lock screw; Lining is provided with the step surface structure, and driven gear presses on the step surface of lining through hold down gag, is positioned at also to be provided with on the lining to be used for hold down gag is carried out spacing back-up ring;

Further, said hold down gag is the dish spring;

Further, said driven gear adopts the duplicate gear structure, comprise gear I, gear II and be arranged at gear I and gear II between the commentaries on classics spring;

Further, said gear shaft is connected in fixed plate through bearing, also is provided with the step surface structure on the gear shaft, and said driving gear is placed in the gear shaft outside and is blocked in the step surface place and fixes;

Further, said contact disk is conoid type, and its small end passes through bolton in the gear shaft end, and big end is provided with annular end face and contacts with the driving friction disk through annular end face.

The beneficial effect of the utility model is: the contact disk assembly mechanical clearance of the utility model is little, has adopted two clutch structures, can improve the control accuracy to rotational potentiometer, has safety protection performance reliably.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the structural representation of the utility model.

Embodiment

Fig. 1 is the structural representation of the utility model, and is as shown in the figure: the contact disk assembly of present embodiment comprises fixed plate 1, drives friction disk 2, driving gear 3, driven gear 4, gear shaft 5, contact disk 6 and output shaft 7; Said driving gear 3 is rotationally connected with fixed plate 1 through said gear shaft 5 single-degree-of-freedoms, and said contact disk 6 is fixedly set in the end of driving gear 3 and gear shaft 5 and is pressed on and drives torque and then 3 rotations of drive driving gear that friction disk 2 is used to transmit driving friction disk 2; Said output shaft 7 single-degree-of-freedoms are rotationally connected with fixed plate 1; Said driven gear 4 is arranged on the output shaft 7 and is used to drive output shaft 7 with driving gear 3 engagements and rotates; Output shaft 7 is the operation axis body of rotational potentiometer 8 rotating parts in the present embodiment; Rotational potentiometer 8 is fixed in fixed plate 1 and is provided with, and structure is more reasonable, and transmission part is few; Transmission of torque is accurate, connects simple, convenient.

In the present embodiment; Said driven gear 4 is connected in output shaft 7 through lining 9 and hold down gag 10, and said lining 9 is fixed in output shaft 7 ends through lock screw 11, and lining 9 is provided with the step surface structure; Driven gear 4 presses on the step surface of lining 9 through hold down gag 10; Be positioned at also to be provided with on the lining 9 and be used for hold down gag 10 is carried out spacing back-up ring 12, driven gear 4 drives output shaft 7 through function of friction and rotates, when output shaft 7 when receiving resistance static; Produce sliding friction between driven gear 4 and the lining 9; Can stop the transmission of rotational motion, prevent contact disk 6 and drive between the friction disk 2 that frictional force is excessive can't to be stopped the transmission of rotational motion and damage potentiometer, protective value is more reliable.

In the present embodiment, said hold down gag 10 is the dish spring, and usability is good, and cost is low.

In the present embodiment; Said driven gear 4 adopts the duplicate gear structure; Comprise gear I 4a, gear II4b and be arranged at gear I 4a and gear II 4b between commentaries on classics spring 4c; Can reduce the mechanical clearance between driving gear 3 and the driven gear 4, and then obtain more accurate feedback signal, be beneficial to the raising control accuracy.

In the present embodiment, said gear shaft 5 is connected in fixed plate 1 through bearing 13, also is provided with the step surface structure on the gear shaft 5, and said driving gear 3 is placed in gear shaft 5 outsides and is blocked in the step surface place and fixes, and structure is more stable, and is not fragile.

In the present embodiment, said contact disk 6 is conoid type, and in gear shaft 5 ends, big end is provided with annular end face and contacts with driving friction disk 2 through annular end face its small end through bolton, and transmission of torque is effective.

Explanation is at last; Above embodiment is only unrestricted in order to the technological scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of the utility model; And not breaking away from the aim and the scope of the utility model technological scheme, it all should be encompassed in the middle of the claim scope of the utility model.

Claims

1. a contact disk assembly is characterized in that: comprise fixed plate, drive friction disk, driving gear, driven gear, gear shaft, contact disk and output shaft; Said driving gear is rotationally connected with fixed plate through said gear shaft single-degree-of-freedom, and said contact disk is fixedly set in the end of driving gear and gear shaft and is pressed on and drives torque and then the rotation of drive driving gear that friction disk is used to transmit the driving friction disk; Said output shaft single-degree-of-freedom is rotationally connected with fixed plate; Said driven gear is arranged on the output shaft and is used to drive output shaft with the driving gear engagement and rotates.

2. contact disk assembly according to claim 1; It is characterized in that: said driven gear is connected in output shaft through lining and hold down gag; Said lining is fixed in output shaft end through lock screw; Lining is provided with the step surface structure, and driven gear presses on the step surface of lining through hold down gag, is positioned at also to be provided with on the lining to be used for hold down gag is carried out spacing back-up ring.

3. contact disk assembly according to claim 2 is characterized in that: said hold down gag is the dish spring.

4. contact disk assembly according to claim 3 is characterized in that: said driven gear adopts the duplicate gear structure, comprise gear I, gear II and be arranged at gear I and gear II between the commentaries on classics spring.

5. contact disk assembly according to claim 4 is characterized in that: said gear shaft is connected in fixed plate through bearing, also is provided with the step surface structure on the gear shaft, and said driving gear is placed in the gear shaft outside and is blocked in the step surface place and fixes.

6. contact disk assembly according to claim 5 is characterized in that: said contact disk is conoid type, and its small end passes through bolton in the gear shaft end, and big end is provided with annular end face and contacts with the driving friction disk through annular end face.