CN217056166U

CN217056166U - Gear center distance adjusting device

Info

Publication number: CN217056166U
Application number: CN202221039649.0U
Authority: CN
Inventors: 董文欣
Original assignee: Beijing Wandong Medical Technology Co ltd
Current assignee: Beijing Wandong Medical Technology Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-07-26
Anticipated expiration: 2032-04-29

Abstract

The application relates to a gear center distance adjusting device, including: the power output device comprises a bottom plate, a driving gear and a driven gear, wherein the driving gear is connected to a gear shaft of the power output device, the gear shaft is sleeved with a bearing, an eccentric shaft sleeve is arranged between the bearing and the bottom plate and comprises a connecting hole and a ferrule, the bearing is arranged in the connecting hole, and the ferrule is rotatably arranged on the bottom plate. The bearing is connected to the gear shaft of the driving gear and is installed in the eccentric shaft sleeve, the position of the bearing can be eccentrically adjusted by rotating the eccentric shaft sleeve, the position of the gear shaft is driven to be adjusted, and then the driving gear connected to the gear shaft is eccentrically translated in the radial direction of the eccentric shaft sleeve, so that the adjustment of the center distance between the driving gear and the driven gear is realized.

Description

Gear center distance adjusting device

Technical Field

The application relates to the technical field of medical equipment, in particular to a gear center distance adjusting device.

Background

With the rapid development of modern medical technology, people often use medical X-ray machines to perform some examinations. When a part of the device is required to make a rotational movement, it is usually considered to use a gear to transmit power. In the gear assembling process, the gear center distance is an important size, and the oversize or undersize center distance can influence the stability and the service life of gear transmission. In the prior art, when the center distance cannot be adjusted, the center distance of the gear is usually ensured by the machining precision during machining of parts. Or the center distance can be adjusted by enlarging the mounting hole or adding an adjusting screw and the like.

The mode of relying on machining precision to guarantee the gear center distance has very high requirements on machining equipment, and once machining problems occur, the whole parts are scrapped. The mode of adjusting the center distance of the gear by increasing the mounting hole can cause the problem of increasing the center distance in the later use process due to time reasons because of lacking of a retaining structure. The mode of increasing adjusting screw adjusting gear centre-to-centre spacing because of screw self reason, can produce the problem that the screw becomes flexible and leads to the centre-to-centre spacing grow.

SUMMERY OF THE UTILITY MODEL

The purpose of this application is to provide a gear centre-to-centre spacing adjusting device, this gear centre-to-centre spacing adjusting device simple structure easily adjusts the centre-to-centre spacing between driving gear and the driven gear, has reduced the required precision of processing equipment and has reduced the processing cost simultaneously.

In order to achieve the above object, the utility model provides a gear centre-to-centre spacing adjusting device, include: the power output device comprises a bottom plate, a driving gear and a driven gear, wherein the driving gear is connected to a gear shaft of the power output device, the gear shaft is sleeved with a bearing, an eccentric shaft sleeve is arranged between the bearing and the bottom plate and comprises a connecting hole and a ferrule, the bearing is arranged in the connecting hole, and the ferrule is rotatably arranged on the bottom plate.

In an optional embodiment, an axial center of the connecting hole and an axial center of the ferrule are eccentrically arranged, an outer side wall of the bearing is connected with a hole wall of the connecting hole, and the ferrule is in clearance fit with the bottom plate.

In an optional embodiment, a plurality of grooves are uniformly distributed on the circumference of the ferrule at intervals, the plurality of grooves are arranged on the side portion, close to the driving gear, of the ferrule, a connecting seat is arranged on the other side of the ferrule, and a stop ring protruding out of the ferrule in the radial direction is arranged on the connecting seat.

In an optional implementation manner, a through hole for mounting the eccentric shaft sleeve is formed in the bottom plate, an annular groove is formed in the radial outer side of the through hole, the stop ring is accommodated in the annular groove, and the connecting seat and the stop ring are in clearance fit with the through hole and the annular groove respectively.

In an alternative embodiment, the collar has an outer diameter greater than an outer diameter of the drive gear, and the plurality of grooves are disposed outside of a rim of the drive gear.

In an optional implementation manner, an adapter plate is arranged between the power output device and the base plate, the power output device is connected to the adapter plate, and the adapter plate is mounted on the base plate through a tightening screw.

In an optional implementation manner, the base plate is provided with a connection through hole for the tightening screw to pass through, the adapter plate is provided with a screw hole for connecting the tightening screw, and the connection through hole is a smooth hole and has an aperture larger than the outer diameter of the tightening screw.

In an alternative embodiment, the tightening screw includes socket head cap screws symmetrically disposed at the radially outer periphery of the eccentric bushing, the tightening screw and the connecting through holes each include four tightening screws, and the centers of the four connecting through holes are arranged in a rectangular shape.

In an alternative embodiment, the power take-off comprises a speed reducer or a motor, and the gear shaft comprises a power take-off shaft of the speed reducer or the motor.

In an alternative embodiment, the driven gear is fixedly mounted on the bottom plate through a driven bearing, and the driven gear is in meshed connection with the driving gear.

The bearing is connected to the gear shaft of the driving gear, the bearing is installed in the eccentric shaft sleeve, the position of the bearing can be eccentrically adjusted through rotating the eccentric shaft sleeve, the position of the gear shaft is driven to be adjusted, and then the driving gear connected to the gear shaft is eccentrically translated in the radial direction of the eccentric shaft sleeve, so that the adjustment of the center distance between the driving gear and the driven gear is achieved.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic perspective view of a gear center distance adjusting device according to the present application;

FIG. 2 is a schematic cross-sectional view of a gear center distance adjusting device according to the present application;

FIG. 3 is a schematic view of a split structure of the gear center distance adjusting device according to the present application;

FIG. 4 is a schematic perspective view of an eccentric bushing according to the present application;

fig. 5 is a schematic top view of the eccentric bushing according to the present application.

Icon:

1-eccentric shaft sleeve; 11-a ferrule; 12-connecting hole; 13-a groove; 14-a connecting seat; 15-a stop ring;

2-a bottom plate; 21-a through hole; 22-an annular groove; 23-connecting perforations;

3-a driving gear; 31-a gear shaft; 32-active bearing;

4-a driven gear; 41-a driven bearing;

5-a speed reducer;

61-an adapter plate; 62-a set screw; 63-screw holes;

7-loosening and tightening the screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 to 3, the present application provides a gear center distance adjusting apparatus, including: the power output device comprises a bottom plate 2, a driving gear 3 and a driven gear 4, wherein the driving gear 3 is connected to a gear shaft 31 of the power output device, the gear shaft 31 is sleeved with a bearing, an eccentric shaft sleeve 1 is arranged between the bearing and the bottom plate 2, the eccentric shaft sleeve 1 comprises a connecting hole 12 and a ferrule 11, the bearing is installed in the connecting hole 12, and the ferrule 11 is rotatably arranged on the bottom plate 2.

The utility model provides a gear centre-to-centre spacing adjusting device mainly adjusts the centre-to-centre spacing of installing driving gear 3 and driven gear 4 on bottom plate 2, specifically adjusts the position of driving gear 3 through the form that rotates eccentric sleeve 1, and then adjusts the centre-to-centre spacing between two gears.

When the eccentric sleeve 1 is rotated, the driving gear 3 is displaced by changing the positions of the gear shaft 31 and the driving bearing 32 which is connected to the gear shaft 31 and located on the radially inner side of the eccentric sleeve 1. The driving gear 3 and the eccentric sleeve 1 do not have a specific connection relationship, and the driving bearing 32 installed at the radial inner side of the eccentric sleeve 1 can eccentrically move at the inner side of the outer ferrule 11 when the eccentric sleeve 1 rotates, so as to drive the gear shaft 31 to move horizontally, thereby changing the position of the driving gear 3.

The driving bearing 32 is specifically installed in a connecting hole 12 of the eccentric shaft sleeve 1, the periphery of the driving bearing 32 and the hole wall of the connecting hole 12 are in a close fit installation relation, the connecting hole 12 is an eccentric hole formed in the radial inner side of a ferrule 11 on the eccentric shaft sleeve 1, the driving bearing 32 can move horizontally along with the eccentric movement of the connecting hole 12 along with the rotation of the ferrule 11, then the gear shaft 31 and the driving gear 3 are driven to move horizontally, and finally the technical purpose of adjusting the center distance between the driving gear 3 and the driven gear 4 is achieved.

Referring to fig. 4 to 5, in one specific embodiment, the axis of the connecting hole 12 is not located on the same center as the axis of the ferrule 11, the axis of the connecting hole 12 is located eccentrically from the axis of the ferrule 11, and the connecting hole 12 can be eccentrically rotated with respect to the ferrule 11 inside the ferrule 11 when the eccentric sleeve 1 is rotated.

Based on the laminating of active bearing 32 and installing in connecting hole 12, can make active bearing 32 carry out the translation in connecting hole 12 when rotating ferrule 11, the center of ferrule 11 and connecting hole 12 in this embodiment does not coincide, and the offset is 1mm, can drive active bearing 32, gear shaft 31 and driving gear 3 through rotating ferrule 11 through this kind of setting mode and carry out radial translation in the within range of 1mm, after the centre-to-centre spacing of driving gear 3 and driven gear 4 is accomplished the adjustment, stop the rotation of ferrule 11 to fix power take off on bottom plate 2.

In order to ensure that the driving bearing 32 can reliably move horizontally along with the eccentric rotation of the connecting hole 12, the outer side wall of the driving bearing 32 is connected with the hole wall of the connecting hole 12 to keep a good fitting installation relation, and meanwhile, the installation relation of clearance fit is adopted between the eccentric shaft sleeve 1 and the bottom plate 2 based on the fact that the ferrule 11 can rotate on the bottom plate 2, preferably, clearance fit is reserved between the ferrule 11 and the bottom, a certain amount of rotatable space is given to the ferrule 11 on the bottom plate 2, and the normal operation of center distance adjustment is ensured.

Based on the fact that the ferrule 11 needs to be rotated to adjust the gear center distance in the present embodiment, a plurality of grooves 13 are provided on the circumference of the ferrule 11, and the grooves 13 are specifically used for matching use of a rotating tool, for example, a special wrench comprising two jaws hooks two opposite grooves 13 to apply a rotating force to rotate the ferrule 11 horizontally on the bottom plate 2. In order to rotate the ferrule 11 at a plurality of angles, a plurality of grooves 13 are uniformly distributed on the circumference of the ferrule 11 at intervals, visual observation is performed on the displacement adjustment of the driving gear 3 conveniently, the plurality of grooves 13 are arranged on the lateral portion, close to the driving gear 3, of the ferrule 11, and the position of the driving gear 3 can be accurately and reliably adjusted through the arrangement mode, so that the convenience and the rapidness are realized.

In order to facilitate the installation of the eccentric sleeve 1 on the bottom plate 2, a connecting seat 14 is provided on the ferrule 11 on the other side opposite to the groove 13, and a stop ring 15 protruding radially from the ferrule 11 is provided on the connecting seat 14.

Offer the through-hole 21 that is used for installing eccentric sleeve 1 on the bottom plate 2, the lasso 11 passes through the through-hole 21 and outstanding in bottom plate 2, is provided with annular groove 22 in the radial outside of through-hole 21, and backstop ring 15 has constituted eccentric sleeve 1's shaft shoulder, can cooperate with annular groove 22, through with backstop ring 15 holding in annular groove 22, has realized the spacing installation to eccentric sleeve 1, prevents that it from droing towards driving gear 3 direction in through-hole 21.

In order to ensure that the eccentric bushing 1 can rotate at the bottom portion, the connecting seat 14 and the stop ring 15 are in clearance fit with the through hole 21 and the annular groove 22, respectively. Through the relation of the two parts and the 2 structure clearance fit of bottom plate respectively, can realize the rotatable of eccentric sleeve 1 on the bottom, prevent to appear rotating the in-process card shell that appears.

From the angle of avoiding driving gear 3 to sheltering from eccentric sleeve 1, prevent to interfere between rotation instrument and the driving gear 3, the external diameter of lasso 11 is greater than driving gear 3's external diameter, and a plurality of recesses 13 set up in the rim outside of driving gear 3, can strengthen eccentric sleeve 1 pivoted maneuverability in the at utmost, easily through the adjustment that rotates eccentric sleeve 1 and realize the centre-to-centre spacing.

In another embodiment, the power output device is integrated with the gear shaft 31 while the gear shaft 31 is translated along with the driving bearing 32, and the power output device is translated along with the driving bearing 32 rotating around the axis of the connecting hole 12 under the eccentric rotation of the connecting hole 12 relative to the ferrule 11.

Specifically, the power output device is connected to the lower portion of the base plate 2 through an adapter plate 61, and the power output device in this embodiment includes a speed reducer 5, and the adapter plate 61 is provided between the speed reducer 5 and the base plate 2. The adapter plate 61 and the speed reducer 5 are connected into an integral structure through a fixing screw 62, the gear shaft 31 is connected to the speed reducer 5 and penetrates through the bottom plate 2, the driving bearing 32 and the eccentric sleeve 1 are connected to the bottom plate 2 of the gear shaft 31, the driving gear 3 is connected to the extending tail end of the gear shaft 31, and the adapter plate 61 is installed on the bottom plate 2 through a tightening screw 7.

Specifically, the bottom plate 2 is provided with a connecting through hole 23 for the loose screw 7 to pass through, the adapter plate 61 is provided with a screw hole 63 for connecting the loose screw 7, and a feed screw passes through the connecting through hole 23 on the bottom plate 2 and is screwed in the screw hole 63 of the adapter plate 61 during connection. When the eccentric sleeve 1 rotates, the reducer 5, the gear shaft 31, the driving bearing 32, and the driving gear 3 as a whole translate, so that the center distance needs to be adjusted in a state that the loosening/tightening screw 7 is loosened, and the whole structure has a certain amount of movement on the bottom plate 2. Preferably, the connection penetration hole 23 in this embodiment is in the form of a light hole, and the hole diameter of the connection penetration hole 23 is larger than the outer diameter of the tightening screw 7. Through the arrangement mode, when the eccentric shaft sleeve 1 is rotated, the elastic screw 7 can be enabled to translate in the connecting through hole 23, and after the gear center distance is adjusted in place, the elastic screw 7 is fastened and locked, so that the adjusted gear center distance is kept.

In order to reduce the operation space for loosening and locking the tightening screw 7, the tightening screw 7 in this embodiment includes socket head cap screws symmetrically disposed on the radial periphery of the eccentric sleeve 1, and the tightening operation of the tightening screw 7 is performed by an L-shaped socket head cap screw.

Based on the eccentric arrangement of the ferrule 11 and the connecting hole 12 on the eccentric shaft sleeve 1 and the eccentric size of the ferrule 11 and the connecting hole 12, the elastic screw 7 can horizontally translate in the connecting through hole 23 within the range of +/-1 mm, the symmetrically arranged inner hexagon screws can ensure the balance of applied locking force, the speed reducer 5 and the gear shaft 31 are stably and firmly installed on the bottom plate 2, and the phenomenon that the back loosening occurs after the adjustment of the gear center distance is confirmed is avoided.

The elastic screws 7, the connection through holes 23 and the screw holes 63 in the embodiment all comprise four elastic screws, the centers of the four connection through holes 23 are arranged in a rectangular mode, specifically, when the elastic screws are adjusted, at least part of screw rods on the elastic screws 7 in a loosening state are in threaded connection with the screw holes 63, screw caps of the elastic screws 7 are separated from tight connection with the bottom plate 2, the elastic screws 7 can translate in the connection through holes 23, the centers of the four connection through holes 23 are arranged in a rectangular mode, translation of the power output device and the driving gear 3 within a certain range can be guaranteed, and accuracy of center distance adjustment is guaranteed.

Except for the speed reducer 5, the power output device can also be a motor, the gear shaft 31 is directly connected to the speed reducer 5 or the motor and is used as a power output shaft to transmit power, and the stability and the reliability of transmission are ensured.

The utility model provides a gear centre-to-centre spacing adjusting device mainly is to adjusting the centre-to-centre spacing between driving gear 3 and the driven gear 4, and driven gear 4 is connected with driving gear 3 meshing through from 41 fixed mounting of driven bearing on bottom plate 2. In the adjusting process, the driven gear 4 does not displace, and the center distance of the two gears in meshed connection is adjusted by adjusting the positions of the driving gear 3 and the power output device.

The utility model provides an eccentric sleeve 1, because the eccentricity is less, can make active bearing 32 bear the radial force because of eccentric rotation produces reliably when rotating, guaranteed the reliability of eccentric rotation roll adjustment, simultaneously when the gear centre-to-centre spacing adjustment back that targets in place, can accomplish the fixed to power take-off and driving gear 3 through lag screw 7, avoid appearing the variable pitch problem that the in-service becomes flexible and cause, when having reduced the requirement to the processing equipment, the equipment processing cost has been reduced.

The utility model does not limit the specific setting position of the eccentric sleeve 1, except that the bearing and the eccentric sleeve 1 are arranged on the gear shaft 31 of the driving gear 3, the eccentric sleeve 1 is installed on the bearing of the driven gear 4, and the position of the driven gear 4 is adjusted by rotating the eccentric sleeve 1, so that the technical purpose of adjusting the center distance of the gear can be achieved; meanwhile, the groove 13 on the eccentric shaft sleeve 1 can be opened or processed in a plane mode, so that the processing is convenient and the eccentric shaft sleeve 1 is easy to rotate; the eccentric sleeve 1 can also be directly connected to the gear shaft 31, and the position of the gear can be adjusted more directly through the translation of the gear shaft 31, which is not described in detail herein.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gear center distance adjusting device, comprising: the power output device comprises a bottom plate, a driving gear and a driven gear, wherein the driving gear is connected to a gear shaft of the power output device, the gear shaft is sleeved with a bearing, an eccentric shaft sleeve is arranged between the bearing and the bottom plate and comprises a connecting hole and a ferrule, the bearing is arranged in the connecting hole, and the ferrule is rotatably arranged on the bottom plate.

2. The gear center distance adjusting device according to claim 1, wherein an axis of the connecting hole is eccentric to an axis of the ring, an outer side wall of the bearing is connected to a hole wall of the connecting hole, and the ring is in clearance fit with the bottom plate.

3. The device for adjusting the gear center distance according to claim 1, wherein a plurality of grooves are uniformly distributed on the circumference of the ferrule at intervals, the plurality of grooves are arranged on the side portion of the ferrule close to the driving gear, a connecting seat is arranged on the other side of the ferrule, and a stop ring protruding out of the ferrule in the radial direction is arranged on the connecting seat.

4. The device for adjusting the center distance between the gears according to claim 3, wherein the bottom plate is provided with a through hole for mounting the eccentric sleeve, an annular groove is provided at a radial outer side of the through hole, the stop ring is received in the annular groove, and the connecting seat and the stop ring are in clearance fit with the through hole and the annular groove, respectively.

5. The gear center distance adjusting apparatus according to claim 3, wherein said collar has an outer diameter larger than an outer diameter of said drive gear, and a plurality of said grooves are provided outside a rim of said drive gear.

6. The gear center distance adjusting device according to any one of claims 1 to 5, wherein an adapter plate is provided between the power output device and the base plate, the power output device is connected to the adapter plate, and the adapter plate is mounted on the base plate by a tightening screw.

7. The gear center distance adjusting device according to claim 6, wherein the bottom plate is provided with a connecting through hole for the tightening screw to pass through, the adapter plate is provided with a screw hole for connecting the tightening screw, and the connecting through hole is a unthreaded hole and has an aperture larger than the outer diameter of the tightening screw.

8. The gear center distance adjusting apparatus according to claim 7, wherein the tightening screw includes socket head cap screws symmetrically disposed at radially outer peripheries of the eccentric bushings, the tightening screw and the connecting through holes each include four, and centers of the four connecting through holes are arranged in a rectangular shape.

9. The gear center distance adjusting device according to any one of claims 1 to 5, wherein the power output means includes a speed reducer or a motor, and the gear shaft includes a power output shaft of the speed reducer or the motor.

10. The gear center distance adjusting device according to any one of claims 1 to 5, wherein the driven gear is fixedly mounted on the base plate through a driven bearing, and the driven gear is in meshed connection with the driving gear.