CN217845217U - Integrated gear box of absolute value encoder - Google Patents

Abstract

The utility model discloses an absolute value encoder's integrated form gear box relates to encoder technical field, including upper end cover, lower end cover, gear shaft, bearing and radial two poles of the earth magnet, upper end cover detachable is fixed in the upper end of lower end cover and both inside formations in fixed back hold the chamber, the upper end cover is equipped with the mounting hole, the position that the lower end cover corresponds the mounting hole is equipped with down the mounting hole, the upper end of gear shaft is fixed in last mounting hole department through the bearing, the lower extreme of gear shaft passes through the bearing and fixes mounting hole department under, radial two poles of the earth magnet sets up the upper end at the gear shaft. The shaft end can be rotatably fixed on the end cover through the bearing, so that two ends of the shaft are circumferentially fixed, the problem of suspension of the shaft is solved, and the influence on the measurement precision caused by slight deviation of radial two-pole magnets is effectively avoided; in addition, the integrated gear box has the characteristics of integrated installation, compact size, concentrated structure, long service life, convenience in gear set replacement and high upper limit of rotating speed.

Description

Integrated gear box of absolute value encoder

Technical Field

The utility model relates to an encoder technical field, concretely relates to integrated form gear box of absolute value encoder.

Background

An encoder is a device that compiles, converts, and formats signals (e.g., bitstreams) or data into a form of signals that can be communicated, transmitted or stored. The encoder can be divided into a contact type and a non-contact type according to a reading mode; encoders can be classified into incremental encoders and absolute encoders according to their operation principles.

The existing non-contact absolute value encoder, such as a multi-turn absolute value encoder (CN 111649768A), mainly comprises a main body, a main shaft, a driving gear, a driven gear, a multi-code-channel absolute value encoding disk, a circuit board, a radial magnetizing magnet, a hall sensor, an upper cover, a bearing and a driven gear shaft; the driving gear is meshed with the driven gear, the driven gear is fixed on the main body through a driven gear shaft, and the driven gear is provided with a radial magnetizing magnet. Such absolute value encoders have the following disadvantages: 1. the lower end of the driven gear shaft is fixedly inserted at the bottom of the inner cavity of the main body, the upper end of the driven gear shaft is limited by the multi-code-channel absolute value coding disc and the circuit board and is in a suspended state, when the main shaft rotates at a high speed to drive the driven gear to rotate at a high speed, the acting force of the driven gear on the driven gear is obviously increased, the driven gear shaft with one suspended end can slightly deform, so that the radial magnetizing magnet slightly deviates, and the measurement precision is influenced; 2. the driven gear is limited by the bottom surface of the inner cavity of the main body downwards and limited by the upper rim of the driven gear upwards; because of relative rotation, the upper side and the lower side of the driven gear are not required to be in contact with the bottom surface of the inner cavity of the main body and the upper rim of the driving gear, otherwise, the upper side and the lower side of the driven gear can rub against each other to cause rapid abrasion, however, the design for avoiding contact does not exist in the prior art; 3. the driven gear is sleeved on the driven gear shaft, sliding friction exists between the driven gear and the driven gear shaft, and the friction force not only influences the rotating speed and is not suitable for measuring the high rotating speed, but also influences the service life; 4. although many gears constituting the gear set are fixed, the gears are in 'loose packed', and if the gear set is damaged, the gear set is very time-consuming and labor-consuming to replace.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides an absolute value encoder's integrated form gear box to solve among the prior art because driven gear axle one end is unsettled, driven gear axle axial is spacing unreasonable, driven gear and driven gear interaxial frictional force big, the gear train belongs to in bulk and the precision that leads to is poor, the life-span is low, the rotational speed can not be too high, more slide gear group wastes time and energy one or more problem among the technical problem.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides an absolute value encoder's integrated form gear box, includes upper end cover, lower extreme cover, gear shaft, bearing and radial two poles of the earth magnet, upper end cover detachable is fixed in the upper end of lower extreme cover and both fixed back inside forms and holds the chamber, the upper end cover is equipped with the mounting hole, the position that the mounting hole was gone up in the lower extreme cover correspondence is equipped with down the mounting hole, the upper end of gear shaft is fixed in last mounting hole department through the bearing, the lower extreme of gear shaft passes through the bearing and fixes mounting hole department under, radial two poles of the earth magnet sets up the upper end at the gear shaft.

Furthermore, the upper mounting hole is a stepped hole with a small upper part and a large lower part, the lower mounting hole is a stepped hole with a large upper part and a small lower part, and the bearing is mounted in a large hole of the stepped hole; the gear shaft includes the rotation axis and the fixed tooth that sets up all sides in rotation axis middle section, thick step shaft in the middle of the rotation axis is the both ends are thin, the bearing housing is established and is carried out axial positioning at the thin epaxial and step through the shaft shoulder of step shaft and shoulder hole of step shaft at the step shaft, expose in the upper end follow mounting hole of rotation axis with the radial two poles of earth magnet of installation.

Furthermore, the integrated gear box of the absolute value encoder further comprises a fixed shaft and a transmission gear, the upper end cover is further provided with an upper inserting hole, the lower end cover is further provided with a lower inserting hole, the upper end of the fixed shaft is inserted and fixed in the upper inserting hole, the lower end of the fixed shaft is inserted and fixed in the lower inserting hole, and the transmission gear is rotatably arranged on the fixed shaft through a bearing and limits axial positioning of the transmission gear through the bearing.

Furthermore, the lower edge of the upper plug hole protrudes downwards to form a lower convex ring, and the upper edge of the lower plug hole protrudes upwards to form an upper convex ring; the central axis of the transmission gear is provided with a stepped hole with two large ends and a small middle part, the bearing is arranged in a large hole of the stepped hole, and the bearing is axially positioned through the convex ring and the step of the stepped hole.

Furthermore, the edge of the lower end cover is provided with a connecting hole, and a nut is arranged in the connecting hole; a bolt hole is formed in the position, corresponding to the connecting hole, of the upper end cover, and a bolt penetrates through the bolt hole; the upper end cover and the lower end cover are detachably fixed through screwing bolts and nuts.

Further, a circuit board is detachably fixed to the upper side of the upper end cover.

The utility model has the advantages of as follows:

1. the two end covers are arranged, and the shaft ends are either directly and fixedly connected to the end covers or are rotatably fixed on the end covers through bearings, so that the two ends of the shaft are circumferentially fixed, the problem of suspension of the shaft is solved, and the influence on the measurement precision caused by slight deviation of radial two-pole magnets is effectively avoided;

2. the bearing, the stepped shaft, the stepped hole and the convex ring are used for axially positioning the shaft or the gear, and the side face of the gear is not used for limiting, so that direct friction is avoided, and the limiting is more reasonable;

3. sliding friction is changed into rolling friction by using a bearing, so that the friction force is smaller, and the device can be suitable for measuring the diagonal displacement side during high-speed rotation;

4. the gear set and the shaft are concentrated in the accommodating cavity formed by the two end covers, the bulk is changed into an integrated form, and the whole holding force and gear box is replaced during replacement, so that the labor and the time are saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the range which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic perspective view of an integrated gear box of an absolute value encoder according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an integrated gear box of an absolute value encoder according to an embodiment of the present invention with an upper end cover removed;

fig. 3 is a schematic structural view of a perspective view of an integrated gear box of an absolute value encoder provided by an embodiment of the present invention with a lower end cover removed;

fig. 4 is a cross-sectional view of an integrated gear box of an absolute value encoder according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of another viewing direction of the integrated gear box of the absolute value encoder according to the embodiment of the present invention;

fig. 6 is a schematic view of a connection relationship between an integrated gear box and a circuit board of an absolute value encoder according to an embodiment of the present invention;

fig. 7 is an exploded view of a connection relationship between a gear shaft and upper and lower end plates of an integrated gear box of an absolute value encoder according to an embodiment of the present invention;

fig. 8 is an exploded view of the connection relationship between the fixed shaft and the upper and lower end plates of the integrated gear box of the absolute value encoder according to the embodiment of the present invention;

fig. 9 is a schematic diagram of a transmission (meshing) relationship of a gear set of an integrated gear box of an absolute value encoder according to an embodiment of the present invention.

In the figure: 1-upper end cover, 11-bolt hole, 12-upper mounting hole, 13-upper plug hole, 14-lower convex ring, 2-lower end cover, 21-connecting hole, 22-nut, 23-lower mounting hole, 24-lower plug hole, 25-upper convex ring, 3-gear shaft, 31-rotating shaft, 32-fixed gear, 4-fixed shaft, 5-transmission gear, 6-bearing, 7-radial two-pole magnet, 8-circuit board, 101-first gear, 102-second gear, 103-third gear, 104-fourth gear, 105-fifth gear, 106-sixth gear, 107-seventh gear, 108-eighth gear, 109-ninth gear, 110-tenth gear, 111-eleventh gear, 112-twelfth gear, 113-thirteenth gear, 114-fourteenth gear, 115-fifteenth gear, 116-sixteenth gear, 117-seventeenth gear.

Detailed Description

The present invention is described in detail with reference to the specific embodiments, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure herein. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof without substantial changes in the technical content are also regarded as the scope of the present invention.

The embodiment provides an integrated gear box of an absolute value encoder, which is arranged in the absolute value encoder for use, and a plurality of existing gears are all arranged in the box so as to form the integrated gear box; and a magnet driven by a gear is arranged at the box cover so as to facilitate the circuit board to carry out non-contact measurement by utilizing the magnetoelectric principle. After the bulk is changed into the integrated form, the slight offset of the suspended end of the shaft (which causes the slight offset of the magnet) can be avoided, and the precision is improved; the integrated installation and layout has the characteristics of compact size and concentrated structure; the double-bearing mode is adopted, so that the shaft is not deviated, the axial positioning of the gear is better, and the integral stability is high; the sliding friction of the bearing is changed into rolling friction, so that the friction force is reduced, and the limit rotating speed is effectively improved

As shown in fig. 1 to 8, an integrated gear box of an absolute value encoder includes an upper end cover 1, a lower end cover 2, a gear shaft 3, a fixed shaft 4, a transmission gear 5, a bearing 6, a radial two-pole magnet 7, and the like; the gear shaft 3 may be regarded as a combination of the rotating shaft 31 and a gear, may be in a form in which the gear is sleeved on the rotating shaft 31 and the two transmit torque through a key, or may be in an integral structure.

The upper end cover 1 is detachably fixed at the upper end of the lower end cover 2, at least one of the lower end cover 2 or the upper end cover 1 is of a concave structure, so that a box body is formed after the lower end cover 2 or the upper end cover 1 are fixed, and an accommodating cavity is formed in the box body. A plurality of gears and shafts are mounted within the case. Optionally, the edge of the lower end cap 2 is provided with a connecting hole 21, and a nut 22 is arranged in the connecting hole 21; a bolt hole 11 is formed in the position, corresponding to the connecting hole 21, of the upper end cover 1, and a bolt penetrates through the bolt hole 11; the upper end cover 1 and the lower end cover 2 are detachably fixed through screwing bolts and nuts 22; when the fixing is carried out, the shaft end of the gear shaft 3 is ensured to be aligned with the bearing 6 in the mounting hole, the fixing shaft 4 is ensured to be aligned with the inserting hole, and the connecting hole 21 is ensured to be aligned with the bolt hole 11.

In this embodiment, upper end cover 1 is equipped with mounting hole 12, and lower end cover 2 corresponds the position of last mounting hole 12 and is equipped with down mounting hole 23, and bearing 6 is passed through to the upper end of gear shaft 3 and fixes in last mounting hole 12 department, and bearing 6 is passed through to the lower extreme of gear shaft 3 and fixes in mounting hole 23 department down, so, the both ends of gear shaft 3 are all reliably spacing in circumference, do not have the unsettled condition of one end to avoid because of the slight skew that unsettled arouses.

The radial two-pole magnet 7 is arranged at the upper end of the gear shaft 3, and the magnetic field changes along with the rotation of the gear shaft 3. A circuit board 8 is detachably fixed on the upper side of the upper end cover 1, a magnetic chip on the circuit board 8 collects the information of the magnetic field change of each magnet, data are processed by using a clock carry principle, and the data are converted into electric signals to be output to a client.

In this embodiment, the upper mounting hole 12 is a stepped hole having a small top and a large bottom, the lower mounting hole 23 is a stepped hole having a large top and a small bottom, the bearing 6 is mounted in a large hole of the stepped hole, and one side of the bearing 6 is restricted by a step of the stepped hole so as not to move to the side. The gear shaft 3 comprises a rotating shaft 31 and a fixed tooth 32 fixedly arranged on the periphery of the middle section of the rotating shaft 31, the rotating shaft 31 is a stepped shaft with two thin ends and a thick middle part, the bearing 6 is sleeved on the thin shaft of the stepped shaft, and the other side of the bearing 6 is limited by the shaft shoulder of the stepped shaft so as not to move to the side. Thus, the bearing 6 is axially positioned by the shoulder and the step, and the axial movement of the gear shaft 3 is avoided, so that the fixed teeth 32 are ensured not to be displaced in the axial direction. The upper end of the rotary shaft 31 is exposed from the upper mounting hole 12, and the radial two-pole magnet 7 is mounted on the upper end of the rotary shaft 31 so as to bring the circuit board 8 closer to the magnet.

Since the fixed shaft 4 and the transmission gear 5 do not need to be provided with magnets, the fixed shaft 4 does not need to be exposed. In this embodiment, the upper end cap 1 is further provided with an upper insertion hole 13, the lower end cap 2 is further provided with a lower insertion hole 24, the upper end of the fixed shaft 4 is inserted and fixed in the upper insertion hole 13, the lower end of the fixed shaft 4 is inserted and fixed in the lower insertion hole 24, the transmission gear 5 is rotatably arranged on the fixed shaft 4 through the bearing 6, and the axial positioning of the transmission gear 5 is limited through the bearing 6; thus, the fixed shaft 4 is not exposed. Preferably, the lower edge of the upper plug hole 13 protrudes downwards to form a lower convex ring 14, and the upper edge of the lower plug hole 24 protrudes upwards to form an upper convex ring 25; a stepped hole with two large ends and a small middle is arranged at the central axis of the transmission gear 5, a bearing 6 is arranged in a large hole of the stepped hole, and the bearing 6 is axially positioned with a step of the stepped hole through a convex ring; in this way, the axial positioning of the transmission gear 5 can be ensured.

In the following description of the gear rotation by taking fig. 9 as an example, the transmission sequence is: first gear 101-second gear 102-third gear 103-fourth gear 104-fifth gear 105-sixth gear 106-seventh gear 107-eighth gear 108-ninth gear 109-tenth gear 110-eleventh gear 111-twelfth gear 112-thirteenth gear 113-fourteenth gear 114-fifteenth gear 115-sixteenth gear 116-tenth gearSeven gears 117. The first gear 101 is a gear on the gear shaft 3; the second gear 102 and the third gear 103 form a duplicate gear and are arranged on the fixed shaft 4; the fourth gear 104 and the fifth gear 105 form a duplicate gear, and are mounted on the fixed shaft 4; the sixth gear 106 and the seventh gear 107 are gears on the gear shaft 3; the eighth gear 108 is an adjusting gear and is mounted on the fixed shaft 4; the ninth gear 109 and the tenth gear 110 form a dual gear, and are mounted on the fixed shaft 4; the eleventh gear 111 and the twelfth gear 112 are gears on the gear shaft 3; the thirteenth gear 113 is an adjusting gear and is installed on the fixed shaft 4; a fourteenth gear 114 and a fifteenth gear 115 form a duplicate gear and are mounted on the fixed shaft 4; the sixteenth gear 116 and the seventeenth gear 117 are gears on the gear shaft 3; wherein the upper end of the gear shaft 3 (i.e., exposed outside the case) is mounted with a magnet. The lower end of the gear shaft 3 where the first gear is located is exposed out of the box for a certain distance and is provided with a D-shaped connecting hole 21 which can be connected with an external output shaft to be used as an input shaft. The gears are in primary transmission, the magnets arranged on the gear shaft 3 where the first gear 101, the sixth gear 106, the eleventh gear 111 and the sixteenth gear 116 are located rotate, the magnetic field changes, the transmission ratio of every two adjacent magnets is i, and the transmission ratio of the first magnet to the last magnet is i ³ The measuring range of the code wheel is i ³ The magnetic chip on the circuit board 8 collects the information of the magnetic field change of each magnet, processes the data by using the clock carry principle, converts the data into an electric signal and outputs the electric signal to the client.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of this invention without departing from the spirit thereof.

Claims (6)

1. The utility model provides an absolute value encoder's integrated form gear box, its characterized in that, includes upper end cover, lower extreme cover, gear shaft, bearing and radial two poles of the earth magnet, upper end cover detachable is fixed in the upper end of lower extreme cover and both inside formations after fixed hold the chamber, the upper end cover is equipped with the mounting hole, the position that the lower extreme cover corresponds the mounting hole is equipped with down the mounting hole, the upper end of gear shaft is fixed in last mounting hole department through the bearing, the lower extreme of gear shaft is fixed in mounting hole department down through the bearing, radial two poles of the earth magnet sets up the upper end at the gear shaft.

2. The integrated gear box of an absolute value encoder according to claim 1, wherein the upper mounting hole is a stepped hole with a small top and a large bottom, the lower mounting hole is a stepped hole with a large top and a small bottom, and the bearing is mounted in a large hole of the stepped hole; the gear shaft includes the rotation axis and fixed tooth that sets up on rotation axis middle section week side, the rotation axis is thick step shaft in the middle of the both ends is thin, the bearing housing is established and is carried out axial positioning on the thin axle of step shaft and through the shoulder of step shaft and the step of shoulder hole, expose in the upper end follow-up mounting hole of rotation axis in order to install radial two poles of earth magnet.

3. The integrated gear box of an absolute value encoder according to claim 1, further comprising a fixed shaft and a transmission gear, wherein the upper end cap further comprises an upper insertion hole, the lower end cap further comprises a lower insertion hole, the upper end of the fixed shaft is inserted and fixed in the upper insertion hole, the lower end of the fixed shaft is inserted and fixed in the lower insertion hole, and the transmission gear is rotatably disposed on the fixed shaft through a bearing and limits the axial positioning of the transmission gear through the bearing.

4. The integrated gear box of an absolute value encoder according to claim 3, wherein the lower edge of the upper insertion hole protrudes downward to form a lower convex ring, and the upper edge of the lower insertion hole protrudes upward to form an upper convex ring; the central axis of the transmission gear is provided with a stepped hole with two large ends and a small middle part, the bearing is arranged in a large hole of the stepped hole, and the bearing is axially positioned through the convex ring and the step of the stepped hole.

5. The integrated gear box of an absolute value encoder according to claim 1, wherein the edge of the lower end cap is provided with a connecting hole, and a nut is provided in the connecting hole; a bolt hole is formed in the position, corresponding to the connecting hole, of the upper end cover, and a bolt penetrates through the bolt hole; the upper end cover and the lower end cover are detachably fixed through screwing bolts and nuts.

6. The integrated gear box of an absolute value encoder according to claim 1, wherein a circuit board is detachably fixed to an upper side of the upper cover.

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