CN112213512A

CN112213512A - Dead weight formula rotational speed coding device

Info

Publication number: CN112213512A
Application number: CN202011048463.7A
Authority: CN
Inventors: 左时伦; 周雄; 冷再寒; 纪成香
Original assignee: Chongqing University of Science and Technology
Current assignee: Chongqing University of Science and Technology
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-01-12

Abstract

The invention discloses a dead weight type rotating speed encoding device, and particularly relates to the technical field of encoders. The utility model provides a dead weight formula rotational speed coding device, includes the encoder, be equipped with the support frame on the encoder, rotate on the support frame and be connected with the gyro wheel axle of the hub connection of rotating with the encoder, be equipped with the rubber wheel on the gyro wheel axle, still be equipped with the weight adjustment mechanism who is used for adjusting the rubber wheel and applys gravity on the support frame, the last one end of keeping away from the rubber wheel of weight adjustment mechanism rotates and is connected with the fixing base. The technical scheme of the invention solves the problem that the positive pressure required by the existing encoder is inconvenient to adjust when the rotating speed is measured, and can be used for measuring the rotating speed of the rotating shaft on different objects.

Description

Dead weight formula rotational speed coding device

Technical Field

The invention relates to the technical field of encoders, in particular to a dead weight type rotating speed encoding device.

Background

In order to accurately measure the rotating speed of shaft equipment such as a roller or a roller, a contact type rotating wheel encoder is generally adopted, the rotating speed is calibrated by means of the friction transmission speed between contact wheel surfaces and the diameter ratio of a contact wheel. In order to achieve the purpose, a return spring is mostly adopted to obtain positive pressure required by friction in practice, but the elongation of the return spring is not easy to adjust, so that the friction force is inconvenient to adjust; after the rubber wheel is worn, the actual extension of the spring changes, and the friction force changes, so that inaccurate speed measurement can be caused.

Disclosure of Invention

The invention aims to provide a dead weight type rotating speed encoding device, which solves the problem that the positive pressure required by the conventional encoder is inconvenient to adjust when the rotating speed is measured.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a dead weight formula rotational speed coding device, includes the encoder, be equipped with the support frame on the encoder, it is connected with the roller shaft with encoder coaxial coupling to rotate on the support frame, be equipped with the rubber tyer of making by wear-resistant material on the roller shaft, one side that is close to the roller shaft on the support frame is equipped with the weight adjustment mechanism who is used for adjusting the rubber tyer and applys gravity, the one end rotation of keeping away from the rubber tyer on the support frame is connected with the fixing base.

The principle and the effect of the technical scheme are as follows: when the device is used for measuring the rotating speed, the device is firstly fixed on a supporting platform through a fixing seat, and the gravity of the device is utilized to make the rubber wheel contact with the rotating shaft of the tested device, so that the rotating speed of the tested device is transmitted to the encoder by means of friction force, the positive pressure of the rubber wheel on the rotating shaft of the tested device can be adjusted by the weight adjusting mechanism, the rubber wheel is ensured to be always in contact with the rotating shaft of the tested device, and meanwhile, the accuracy of a measuring result is improved.

Furthermore, the weight adjusting mechanism comprises a fixed block integrally formed with the support frame, a lightening hole is formed in the fixed block, and a balancing weight is detachably connected in the lightening hole.

Through the arrangement, the weight of the support frame can be adjusted by utilizing the balancing weight, so that proper positive pressure is provided for the rubber wheel by means of gravity change of the support frame and the roller shaft, and adjustment of the positive pressure is realized.

Furthermore, a bearing is arranged between the support frame and the roller shaft, and a bearing cover plate which is abutted against the bearing is arranged on the support frame.

Furthermore, a spring retainer ring is arranged between the support frame and the fixed seat.

Through the arrangement, the rubber wheel can be positioned, so that the rubber wheel can stably rotate without deflection in the working process.

Furthermore, an elastic coupling is coated between the roller shaft and the rotating shaft of the encoder.

Through the arrangement, the axial deviation between the roller shaft and the encoder rotating shaft can be corrected by means of the elastic coupling, and the stability of the device is improved.

Compared with the prior art, the beneficial effect of this scheme:

1. the dead weight of this device of this scheme utilization is pressed the rubber wheel on the encoder in equipment under test's pivot, and the size of frictional force is confirmed by the dead weight and the coefficient of friction of this device.

2. The acting force applied to the tested element by the device can be adaptively adjusted according to the balance weight, and cannot be changed due to abrasion of the rubber wheel.

3. The scheme has the advantages of simple structure, reliable work, economy and the like.

Drawings

FIG. 1 is a front view of a dead weight type rotational speed encoding apparatus according to the present invention;

FIG. 2 is a cross-sectional view of C-C of FIG. 1;

fig. 3 is a right side view of a dead weight type rotational speed encoding apparatus according to the present invention.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

reference numerals in the drawings of the specification include: encoder 1, backup pad 2, support frame 3, rubber tyer 4, elastic coupling 5, bearing 6, bearing cover plate 7, circlip 8, fixing base 9, fixed block 10.

Examples

As shown in figures 1 and 3: the utility model provides a dead weight formula rotational speed coding device, including encoder 1, encoder 1's left side screw connection has the backup pad 2 of "Z" font, it has the through-hole that supplies encoder 1 to go up the pivot to pass through to open in backup pad 2, the left side welding of backup pad 2 has support frame 3, recess has all been opened to both sides about support frame 3, the roller shaft that passes support frame 3 right side is linked in the rotation of the upper portion of support frame 3, be connected with elastic coupling 5 between roller shaft and encoder 1's the pivot, can correct the axial deviation of roller shaft and encoder 1 pivot with the help of elastic coupling 5, the stability of this device has been improved. As shown in the attached figure 2, a rubber wheel 4 made of wear-resistant rubber is coated on the roller shaft, a bearing 6 seat is connected between the support frame 3 and the roller shaft through bolts, a bearing 6 matched with the roller shaft is arranged in the bearing 6 seat, and a bearing 6 cover plate which is abutted against the bearing 6 is clamped on the right side wall of the support frame 3; the left and right sides of support frame 3 lower extreme all rotates and is connected with the axis of rotation, rotates jointly between two axis of rotation and is connected with fixing base 9, all is equipped with the circlip between every axis of rotation and the support frame 3. The upper portion of the support frame 3 is provided with a weight adjusting mechanism which is used for adjusting the gravity applied by the rubber wheel 4 and is close to the rubber wheel 4, the weight adjusting mechanism comprises a fixing block 10 which is supported by the support frame 3 in an integrated mode, lightening holes are formed in the fixing block 10, a limiting column is welded at the center of each lightening hole, and a plurality of balancing weights are sleeved on the limiting column.

The working process of the scheme is as follows: before this device uses, with the help of fixing base 9 with this device fixed connection on supporting platform to it offsets with equipment under test's pivot to rotate support frame 3 and make rubber wheel 4, thereby pass through rubber wheel 4 with the help of this device self weight and produce positive pressure to equipment under test's pivot, borrow the positive pressure again to make rubber wheel 4 and pivot take place the friction, after equipment under test's pivot rotates, utilize rubber wheel 4 and its frictional force to come the rotational speed transmission to encoder 1, realize the measurement of equipment under test rotational speed.

After this device uses a period, wearing and tearing can take place for rubber wheel 4, because rubber wheel 4 in this device adopts wear-resisting rubber to make, thereby can prolong its life, after the wearing and tearing were sent out at rubber wheel 4, the accessible adds the balancing weight of different weight and changes support frame 3 and pass through the positive pressure that rubber wheel 4 transmission transmitted for the equipment under test pivot, thereby realize the regulation of frictional force and can keep frictional force unchangeable, the problem of rubber wheel 4 because of wearing and tearing lead to the frictional force change has been avoided, measuring accuracy and precision have been improved.

The foregoing are merely examples of the present invention and common general knowledge of known specific structures and/or features of the schemes has not been described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A dead weight type rotational speed encoding device is characterized in that: the rubber wheel encoder is characterized by comprising an encoder, a support frame is arranged on the encoder, a roller shaft which is coaxially connected with the encoder is rotatably arranged on the support frame, a rubber wheel which is made of wear-resistant materials is arranged on the roller shaft, a weight adjusting mechanism which is used for adjusting the gravity applied by the rubber wheel is arranged on one side, close to the roller shaft, of the support frame, and a fixing seat is rotatably connected to one end, far away from the rubber wheel, of the support frame.

2. The self-weight type rotational speed encoding device according to claim 1, wherein: the weight adjusting mechanism comprises a fixed block integrally formed with the support frame, lightening holes are formed in the fixed block, and balancing weights are detachably connected in the lightening holes.

3. The self-weight type rotational speed encoding device according to claim 1, wherein: and a bearing is arranged between the support frame and the roller shaft, and a bearing cover plate which is abutted against the bearing is arranged on the support frame.

4. The self-weight type rotational speed encoding device according to claim 1, wherein: and a spring retainer ring is arranged between the support frame and the fixed seat.

5. The self-weight type rotational speed encoding device according to claim 1, wherein: an elastic coupling is coated between the roller shaft and the rotating shaft of the encoder.