CN212635180U

CN212635180U - Numerical control graduated disk with adjustable worm gear clearance

Info

Publication number: CN212635180U
Application number: CN202021089800.2U
Authority: CN
Inventors: 王红明
Original assignee: Jiaxing Tianhe Machinery Co ltd
Current assignee: Jiaxing Tianhe Machinery Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-03-02
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses a numerical control dividing disc with adjustable worm and gear clearance, which comprises a motor, a worm wheel, a worm and a box body, wherein the worm comprises a transmission shaft and a worm sleeve, spiral teeth are arranged on the worm sleeve, the tooth thickness of the teeth gradually increases from one end to the other end along the axial direction, the transmission shaft is connected with the motor, the worm sleeve is meshed with the worm wheel and is connected with the worm wheel, the worm sleeve is sleeved on the transmission shaft, the worm sleeve is fixedly connected with the transmission shaft in the circumferential direction and is in axial sliding connection, a clearance adjusting device is arranged on the worm sleeve and comprises an adjusting shaft and a connecting sleeve, the connecting sleeve is sleeved on the worm sleeve, the connecting sleeve is fixedly connected with the worm sleeve in the axial direction and is in circumferential rotating connection, the adjusting shaft is connected with the connecting sleeve in the box body by extending outwards from the box, the adjusting shaft is in threaded connection with the box body, and the numerical control dividing disc can adjust the gap between the worm wheel and the worm sleeve by rotating the adjusting shaft.

Description

Numerical control graduated disk with adjustable worm gear clearance

Technical Field

The utility model relates to an index plate technical field, more specifically the numerical control index plate with adjustable worm gear clearance that says so relates to.

Background

The numerical control indexing disc is a machine tool accessory which clamps a workpiece on a chuck or between two apexes and enables the workpiece to rotate, index and position, and is widely applied to milling machines, drilling machines and surface grinding machines; the existing index plate generally comprises a motor, a worm wheel, a workbench, a box body and a locking device, wherein the worm wheel and the worm are arranged in the box body, the motor is in transmission connection with the worm and drives the worm to rotate clockwise or anticlockwise, teeth are arranged in the middle of the worm, tooth sockets are arranged on the outer circumferential surface of the worm wheel, the teeth and the tooth sockets are meshed with each other and transmit power to enable the worm wheel to rotate according to a set number of degrees, the workbench is fixed on the worm wheel, and the locking device fixes the relative position of the worm wheel so as to enable a workpiece fixed on the workbench to complete processing operation, in the working mode, the interaction of the worm wheel and the worm becomes an important factor of the working precision of the index plate, and after long-time use, a gap is generated between the worm wheel and the worm due to long-time abrasion, the generation of the gap not only reduces the transmission precision, safety accidents may also occur seriously.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a numerical control graduated disk with adjustable worm gear clearance can adjust the clearance between worm wheel and the worm cover through rotating the adjusting shaft, makes numerical control graduated disk's work precision keep the accuracy.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a numerical control index plate with adjustable worm and gear clearance comprises a motor, a worm wheel, a worm and a box body, the worm comprises a transmission shaft and a worm sleeve, the worm sleeve is provided with spiral teeth, the tooth thickness of the teeth is gradually increased from one end to the other end along the axial direction, the transmission shaft is connected with the motor, the worm sleeve is meshed with the worm wheel and sleeved on the transmission shaft, the worm sleeve is fixedly connected with the transmission shaft in the circumferential direction and is in sliding connection in the axial direction, the worm sleeve is provided with a gap adjusting device, the clearance adjusting device comprises an adjusting shaft and a connecting sleeve, the connecting sleeve is sleeved on the worm sleeve, the connecting sleeve and the worm sleeve are axially fixedly connected and circumferentially and rotatably connected, the adjusting shaft extends out of the box body and is connected with the connecting sleeve, the adjusting shaft is connected with the connecting sleeve in a circumferential rotating mode and in an axial fixed mode, and the adjusting shaft is in threaded connection with the box body.

Further be provided with the spline on the transmission shaft, be provided with the spline groove on the hole of worm cover, spline and spline groove are mutually supported.

Furthermore, clamping grooves are formed in the worm sleeve and opposite to two sides of the connecting sleeve, elastic check rings are arranged in the clamping grooves, and a bearing is arranged between the worm sleeve and the connecting sleeve.

The adjusting shaft is connected with the nut, the adjusting shaft is connected with the nut through the adjusting shaft, and the nut is connected with the adjusting shaft.

And a first plane bearing and a second plane bearing are arranged on the intermediate shaft, the first plane bearing and the second plane bearing are respectively arranged on two sides of the through hole, one side of the first plane bearing is contacted with the adjusting shaft, the other side of the first plane bearing is contacted with the connecting rod, one side of the second plane bearing is contacted with the nut, and the other side of the second plane bearing is contacted with the connecting rod.

Further the one end that the regulating spindle stretches out the box is provided with the regulation head, it is fixed with the regulating spindle to adjust the head, be provided with the scale on the regulation head, be close to regulation head department on the box and be provided with the pointer, pointer and scale cooperation show the precision that the regulating spindle rotated the regulation.

Compared with the prior art, the beneficial effects of the utility model are that: the worm comprises a transmission shaft and a worm sleeve, the worm wheel is meshed with the worm sleeve, the transmission shaft is connected with the motor, the worm sleeve is sleeved on the transmission shaft, the worm sleeve is fixedly connected with the transmission shaft in the circumferential direction and is in axial sliding connection with the transmission shaft, then the connecting sleeve is driven to move axially by the axial movement of the adjusting shaft, and the connecting sleeve drives the worm sleeve to move axially, so that the gap between the worm sleeve and the worm wheel can be eliminated; the adjusting shaft is connected with the box body through threads, so that the axial movement of the adjusting shaft becomes slow and controllable, and the adjusting process can be slow, controllable and accurate; by arranging the two adjusting shafts which rotate and adjust simultaneously, the worm sleeve can be ensured not to deflect when moving axially, and the situation that the worm sleeve is blocked when moving axially due to the fact that only one adjusting shaft bears force on one side when adjusting is avoided; through setting up the regulation head, set up the scale on the regulation head and set up the pointer on the box, can clearly see the precision of rotation regulation to can make two adjustment axles be in unanimity through the precision of adjusting.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a top view of a worm gear gap adjustable numerical control index plate according to the present invention;

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

FIG. 3 is a cross-sectional view B-B of FIG. 1;

FIG. 4 is a partial enlarged view C of FIG. 1;

fig. 5 is a front view of the connection sleeve;

fig. 6 is a partial enlarged view D of fig. 3.

Labeled as: 1. a worm gear; 21. a drive shaft; 22. a worm sleeve; 31. connecting sleeves; 311. a connecting ring; 312. a connecting rod; 313. a through hole; 32. an adjustment shaft; 321. an intermediate shaft; 322. a threaded segment; 323. a nut; 324. a first planar bearing; 325. a second planar bearing; 33. an adjustment head; 331. calibration; 332. a pointer; 4. and (4) a box body.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

The numerical control index plate with adjustable worm and gear clearance of the present invention is described with reference to fig. 1 to 6.

The utility model provides a numerical control graduated disk with adjustable worm wheel 1 worm clearance, includes motor, worm wheel 1, worm and box 4, the worm includes transmission shaft 21 and worm cover 22, be provided with spiral helicine tooth on the worm cover 22, the tooth thickness of tooth is crescent by one end to the other end along axial direction gradually, transmission shaft 21 is connected with the motor, worm cover 22 is connected with worm wheel 1 meshing, worm cover 22 suit is on transmission shaft 21,

worm cover

22 and 21 circumference fixed connection of transmission shaft and axial sliding connection, be provided with clearance adjustment device on the worm cover 22, clearance adjustment device includes regulating shaft 32 and adapter sleeve 31, adapter sleeve 31 suit is on worm cover 22,

adapter sleeve

31 and 22 axial fixed connection of worm cover and circumferential direction are connected, regulating shaft 32 is connected with adapter sleeve 31 in stretching into box 4 by box 4 outward, regulating

shaft

32 and 31 circumferential direction of adapter sleeve are connected and axial fixed connection, the adjusting shaft 32 is in threaded connection with the box body 4;

as shown in fig. 2, the worm wheel 1 and the worm are arranged in the box body 4, the worm comprises a transmission shaft 21 and a worm sleeve 22, the worm wheel 1 is engaged with the worm sleeve 22, the transmission shaft 21 is connected with the motor, the worm sleeve 22 is sleeved on the transmission shaft 21, the worm sleeve 22 is sleeved with a connecting sleeve 31, the top of the box body 4 is provided with a threaded hole, the adjusting shaft 32 passes through the threaded hole from the outside of the box body 4 to enter the box body 4 to be connected with the connecting sleeve 31, when the motor works, the transmission shaft 21 rotates to drive the worm sleeve 22 to rotate, the worm sleeve 22 is meshed with the worm wheel 1 to drive the worm wheel 1 to rotate, when the worm sleeve 22 and the worm wheel 1 work for a period of time to generate a gap, the precision of the numerical control indexing disc is inaccurate, then, by rotating the adjusting shaft 32, the adjusting shaft 32 moves axially along the threaded hole to drive the connecting sleeve 31 to move axially, and the connecting sleeve 31 drives the worm sleeve 22 to move axially, so that the gap between the worm sleeve 22 and the worm wheel 1 is eliminated;

the adjusting shaft 32 is in threaded connection with the threaded hole, and when the adjusting shaft 32 moves axially to adjust the gap, the threaded connection enables the adjusting process of the adjusting shaft 32 to be slow, controllable and accurate.

Preferably, the transmission shaft 21 is provided with a spline, the inner hole of the worm sleeve 22 is provided with a spline groove, and the spline groove are matched with each other; the transmission shaft 21 and the worm sleeve 22 are connected through splines to transmit torque, so that the worm sleeve 22 and the transmission shaft 21 can slide in the axial direction and can circumferentially fix the transmitted torque, and the spline connection has large transmitted torque and good guidance quality and is suitable for connection with frequent sliding.

Preferably, clamping grooves are formed in the two sides, opposite to the connecting sleeve 31, of the worm sleeve 22, elastic check rings are arranged in the clamping grooves, and a bearing is arranged between the worm sleeve 22 and the connecting sleeve 31; by providing circlips on both sides of the connecting sleeve 31, the connecting sleeve 31 is fixed in the axial direction with respect to the worm housing 22, and by providing a bearing, the worm housing 22 and the connecting sleeve 31 can rotate circumferentially and rotate more smoothly.

Preferably, the number of the adjusting shafts 32 is two, the connecting sleeve 31 comprises a connecting ring 311 and connecting rods 312, both sides of the connecting ring 311 are connected with the connecting rods 312, a through hole 313 is formed in one side, far away from the connecting ring 311, of the connecting rods 312, one end, close to the connecting sleeve 31, of the adjusting shaft 32 is sequentially connected with an intermediate shaft 321 and a threaded section 322, the diameter of the intermediate shaft 321 is smaller than that of the adjusting shaft 32, the intermediate shaft 321 extends into the through hole 313, and the threaded section 322 penetrates through the outside of the through hole 313 and is connected;

as shown in fig. 3, the connecting ring 311 is sleeved on the worm sleeve 22, the connecting rods 312 are connected to two sides of the connecting ring 311, the connecting rods 312 on two sides are both connected to the adjusting shafts 32, when the adjusting shafts 32 adjust the gap, the two adjusting shafts 32 rotate simultaneously, so that the worm sleeve 22 cannot deflect in the axial movement, and the situation that the worm sleeve is locked in the axial movement due to the single-side stress of only one adjusting shaft 32 during adjustment is avoided;

as shown in fig. 6, the middle shaft 321 passes through the through hole 313, and one side of the connecting rod 312 is in contact with the adjusting shaft 32 and the other side is in contact with the nut 323, and the adjusting shaft 32 and the nut 323 clamp the connecting rod 312 in the middle to realize axial fixation; the through hole 313 of the connecting rod 312 is in clearance fit with the middle shaft 321, and the adjusting shaft 32 can rotate in the circumferential direction of the through hole 313.

Preferably, the intermediate shaft 321 is provided with a first plane bearing 324 and a second plane bearing 325, the first plane bearing 324 and the second plane bearing 325 are respectively arranged at two sides of the through hole 313, one side of the first plane bearing 324 is contacted with the adjusting shaft 32, the other side is contacted with the connecting rod 312, one side of the second plane bearing 325 is contacted with the nut 323, and the other side is contacted with the connecting rod 312; as shown in fig. 6, the first plane bearing 324 and the second plane bearing 325 are respectively disposed on two sides of the through hole 313, so that when the adjusting shaft 32 rotates axially, there is no friction between the adjusting shaft 32 and the nut 323 and the connecting rod 312, and abrasion between the adjusting shaft 32 and the connecting rod 312 due to rotation is avoided, and contact between the nut 323 and the connecting rod 312 is also prevented from loosening when the adjusting rod rotates.

Preferably, an adjusting head 33 is arranged at one end of the adjusting shaft 32 extending out of the box body 4, the adjusting head 33 is fixed with the adjusting shaft 32, a scale 331 is arranged on the adjusting head 33, a pointer 332 is arranged on the box body 4 close to the adjusting head 33, and the pointer 332 and the scale 331 are matched to display the rotating adjustment precision of the adjusting shaft 32; as shown in fig. 5, the adjustment head 33 is provided to facilitate the adjustment rotation by the operator, and the scale 331 is provided on the adjustment head 33, so that the accuracy of the rotation adjustment can be clearly seen, and the two adjustment shafts can be aligned by the accuracy of the adjustment.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a numerical control graduated disk with adjustable worm gear clearance, includes motor, worm wheel, worm and box, its characterized in that: the worm includes transmission shaft and worm cover, be provided with spiral helicine tooth on the worm cover, the tooth thickness of tooth is by one end grow gradually to the other end along axial direction, the transmission shaft is connected with the motor, and the worm cover is connected with worm wheel meshing, worm cover suit is on the transmission shaft, and worm cover and transmission shaft circumference fixed connection and axial sliding connection are provided with clearance adjusting device on the worm cover, clearance adjusting device includes regulating spindle and adapter sleeve, the adapter sleeve suit is on the worm cover, and the adapter sleeve is connected with worm cover axial fixity connection and circumferential direction, the regulating spindle is connected with the adapter sleeve by the external income incasement of box, and the regulating spindle is connected and axial fixity connection with adapter sleeve circumferential direction, regulating spindle and box threaded connection.

2. The numerical control index plate with the adjustable worm and gear clearance as claimed in claim 1, is characterized in that: the transmission shaft is provided with a spline, the inner hole of the worm sleeve is provided with a spline groove, and the spline groove are matched with each other.

3. The numerical control index plate with the adjustable worm and gear clearance as claimed in claim 2, is characterized in that: clamping grooves are formed in the two sides, opposite to the connecting sleeve, of the worm sleeve, elastic check rings are arranged in the clamping grooves, and a bearing is arranged between the worm sleeve and the connecting sleeve.

4. The numerical control index plate with the adjustable worm and gear clearance as claimed in claim 3, wherein: the adjusting shaft is two, the adapter sleeve includes go-between and two connecting rods, and two connecting rods are connected on the periphery of go-between and two connecting rods set up relatively, the one side of keeping away from the go-between on the connecting rod is provided with the through-hole, the one end that the adjusting shaft is close to the adapter sleeve has connected gradually jackshaft and screw thread section, the jackshaft diameter is less than the adjusting shaft, and the jackshaft stretches into in the through-hole, and the screw thread section passes outside the through-hole and is connected with.

5. The numerical control index plate with the adjustable worm and gear clearance as claimed in claim 4, wherein: the intermediate shaft is provided with a first plane bearing and a second plane bearing, the first plane bearing and the second plane bearing are respectively arranged on two sides of the through hole, one side of the first plane bearing is in contact with the adjusting shaft, the other side of the first plane bearing is in contact with the connecting rod, one side of the second plane bearing is in contact with the nut, and the other side of the second plane bearing is in contact with the connecting rod.

6. The numerical control index plate with the adjustable worm and gear clearance as claimed in claim 5, wherein: the one end that the regulating spindle stretches out the box is provided with the regulation head, it is fixed with the regulating spindle to adjust the head, be provided with the scale on the regulation head, be close to regulation head department on the box and be provided with the pointer, pointer and scale cooperation show the precision that the regulating spindle rotated the regulation.