DE102009005346A1 - Worm gear i.e. two-stage worm gear, has worm wheel arranged on output shaft between output bearing and bearing, and meshing with worm toothing i.e. involute toothing, which is provided in gear wheel and pinion - Google Patents

Abstract

The gear has a worm shaft (5) supported in a housing (22) by worm bearings (30, 37), and gear wheel (2) arranged on a free-standing shaft journal. A pinion (1) protrudes inside the housing through a recess and meshes with the gear wheel. A bearing (25) is arranged in a circular opening of an output side. An output shaft (7) is supported in the housing by an output bearing (11) and the bearing. The gear wheel and the pinion have a worm toothing i.e. involute toothing, where a worm wheel (6) is arranged on the output shaft between the output bearing and the bearing and meshes with the toothing. The worm toothing is implemented as a cylindrical worm. The worm wheel is implemented as globoid worm wheel. The output shaft is implemented as a solid shaft or a sleeve shaft. The output bearing and the bearings are implemented as roller bearings. The output bearing and the bearing are implemented as angular contact ball bearings or taper roller bearings.

Description

The The invention relates to a worm gear.

From the DE 8 712 502 U1 is known a worm gear.

Of the Invention is therefore the object of a worm gear educate, making it easy to customize and flexible is.

According to the invention the task with the worm gear according to the specified in claim 1 Characteristics solved.

Important Features of the invention in the worm gear are that the Worm gear a housing, a worm shaft and an output shaft, wherein the housing approximately cuboid basic body forms and the housing a drive side, a right-angled first output side and a second output side opposite the first output side Has output side, wherein in the input side approximately is centrally disposed a continuous recess, wherein at the Eintriebsseite to the continuous recess an annular Reinforcement is worked out, in which blind holes are internally threaded, so that a drive unit like a motor or a gearbox flanged to the housing is, wherein the first and the second output side each a congruent opposite, circular opening having a housing portion around the circular openings truncated or cylindrically reinforced and is designed as a bearing receiver, wherein the input side and the housing wall connecting the first and second output sides is designed as a lid, wherein the input side a Stage, which facing the Eintriebsseite behind the annular reinforcement begins and extends to the lid side, so is an area the step parallel to the cover and perpendicular to the input side, the housing and the cover having through holes Have internal thread, in which a screw plug or a Breather valve is screwed, being in an interior of the housing connecting the first and second output side Web is formed, which is opposite to the lid Housing wall in the input side half of the Housing is arranged, wherein the web in a through hole a first bearing recordings is worked out in which a first Worm bearing with an outer ring on the input side against a circumferential shoulder of the through opening is present, being in a housing wall opposite to the input side is a second bearing seat in a continuous, circular, cylindrical reinforced recess of the housing is incorporated and in the second bearing receiving a second screw bearing through a second locking ring via a support disk on a side facing away from the Eintriebsseite an outer ring the second screw bearing is axially supported, wherein the worm shaft from the first and second worm bearing in the housing is stored, with a worm toothing between the first and second screw bearing is arranged on the worm shaft and an end portion of the worm shaft over the first one Worm bearing or over the continuous opening in the web away to the drive side inside the housing forms a freestanding shaft journal on which a gear in arranged in a flying arrangement, wherein a pinion, which by the recess projects into the interior of the housing, with the Gear meshes, being in the circular opening the first output side an output bearing is arranged and in the circular opening of the second output side a bearing is arranged, wherein an output shaft from the output bearing and the bearing is mounted in the housing, wherein a worm wheel is arranged on the output shaft between the output bearing and the bearing and mesh with the worm gear. Is an advantage in doing so, the case is both stiff against The camps is, as well as advantageous openings for installation having.

at an advantageous embodiment, the worm teeth are as Cylindrical screw and the worm wheel designed as a globoidisches worm wheel. The advantage here is that the worm shaft and the worm wheel easy and safe to assemble and safe intervention the teeth is guaranteed.

at a further advantageous embodiment, the worm wheel an inner wheel with a shell of bronze or gray cast iron. From The advantage here is that the worm wheel easy and safe to manufacture is and a sliding of the worm gear on the worm wheel is possible.

at a further advantageous embodiment, the sheath on welded to the inner steel wheel. It is advantageous the sheathing is simply and safely connected to the wheel.

at a further advantageous embodiment, the gear and the pinion a helical toothing, in particular a Involute. The advantage here is that the pinion and the Gear are easy to assemble and safe and quiet mesh. Because different translations possible are, the worm gear is flexible.

In a further advantageous embodiment, the output shaft is designed as a solid shaft and is available from the first output side and / or the two th output side. The advantage here is that the output shaft is safe and easy to install and torque can be transmitted well. The worm gear is therefore flexible for a variety of applications.

at a further advantageous embodiment, the output bearing, the bearing and the first and second screw bearings as rolling bearings executed. The advantage here is that rolling bearings are easy to mount and store the corresponding waves well.

at a further advantageous embodiment, the output bearing and the bearing designed as deep groove ball bearings or tapered roller bearings. The advantage here is that deep groove ball bearings and tapered roller bearings easy to assemble and also axial forces can be absorbed are.

at In a further advantageous embodiment, the first and second Worm bearings as angular contact ball bearings or tapered roller bearings executed. The advantage here is that angular contact ball bearings and Tapered roller bearings are easy to assemble and also axial forces are receivable.

at a further advantageous embodiment is centered in the stage a wall protrudes vertically and the wall has a circular Through opening. The advantage here is that the worm gear easy and good on a mounting device is liftable and there also fixable. Furthermore, the worm gear is flexibly transportable.

at a further advantageous embodiment is the worm shaft made of hardened surface hardened steel in particular 16MnCrS5 and the worm toothing is ground. The advantage here is that the worm shaft of a standard material easy to manufacture.

at a further advantageous embodiment is the worm wheel by means of a Schneckenradpassfeder rotationally fixed on the output shaft arranged and the gear is by means of a gear key on The shaft stub rotatably arranged. The advantage here is that the worm wheel and gear are easy to assemble.

at a further advantageous embodiment, the gear and glued the worm wheel with the stub shaft or the output shaft. From The advantage is that the worm wheel and the gear are simple can be mounted and mounted safely and with low backlash.

at a further advantageous embodiment, the output shaft designed as a hollow shaft. The advantage here is that one to be driven device easily connectable to the worm gear is.

at a further advantageous embodiment is a torque arm at the housing area around the circular openings appropriate.

From The advantage is that the worm gear is simple and safe can be mounted on a device to be driven.

Further Advantages emerge from the subclaims. The invention is not limited to the combination of features of the claims. For the expert, further meaningful combination possibilities arise Claims and / or individual claim features and / or Features of the description and / or figures, in particular the task and / or by comparison with the state the technical task.

embodiments The invention will now be explained in more detail with reference to a drawing. It shows purely schematically:

1 a three-dimensional exploded view of a worm gear according to the invention;

2 a section of another embodiment of a worm gear according to the invention;

3 the same cut as in 2 for another embodiment of the worm gear according to the invention;

4 a section perpendicular to the in 3 shown section of a modified embodiment of the worm gear according to the invention;

5 a section through a torque arm for the in 1 shown worm gear;

6 a cut like in 2 shown by the in 1 embodiment shown;

7 a cut like in 4 the in 1 embodiment shown;

8th a section through a further hollow shaft with shrink disc for a worm gear according to the invention; and

9 a section through a portion of a hollow shaft with shrink disk and fixed the cover.

1 shows a three-dimensional exploded view of an inventive worm gear, which is a housing 22 , a worm shaft 5 and an output shaft 7 includes.

The housing 22 forms an approximately cuboid basic body. A Eintriebsseite has approximately centrally on a continuous recess. Around the through recess, the housing is designed as a ring-shaped reinforcement. The annular reinforcement is at least partially over the base body. Protruding sections of the annular reinforcement are funnel-shaped connected to the base body.

A pinion 1 protrudes through the continuous recess into the housing. The annular reinforcement serves to flanging a motor. For this are in the axial direction of the pinion 1 Blind holes with internal thread incorporated in the annular reinforcement. By means of fasteners screwed into the blind holes, the motor is fastened to the housing. The pinion 1 can be fixed to a driven end region of a motor shaft, not shown.

The housing is perpendicular to the input side 22 a first output side and the first output side opposite second output side. In the first and the second output side is ever a congruent opposite, circular opening incorporated. A housing area around the circular openings is cylindrically reinforced and worked out as a bearing receptacle. In a directed outwardly of the housing end face of the housing portion of the first output side and the second output side further blind holes are incorporated. The further blind holes are through a first, second, third, fifth, seventh and eighth stopper 158 . 159 . 160 . 167 . 172 . 173 closable.

A housing wall connecting the input side and the first and second output sides is a cover 100 executed. The lid is by means of cover screws 101 , which are screwed into corresponding receptacles in the first and second output side attached. The lid is stuck 100 a seal 102 firmly.

The input side has a step, which begins with the direction of the input side behind the annular reinforcement and extends to the cover side. Thus, a perpendicular to Eintriebsseite extending surface of the step is parallel to one of the lid 100 spanned level. In the middle of the step, a wall running parallel to the first and second output side protrudes vertically. The wall has a circular passage opening, to which transport means for transporting the worm gear can be attached.

Alternative to the wall is, as in 4 and 7 to see an eyelet 24 attachable to one of the blind holes in the annular reinforcement. The eyelet 24 is made of an egg-shaped sheet metal section, in which a smaller and a larger hole are introduced. The smaller hole is used for attachment to the worm gear and the larger hole for attaching a means of transport such as a rope or a crane hook.

The housing 22 and the lid 100 have through holes with internal thread into which a screw plug 59 or a vent valve 20 is screwed.

This is a position of the vent valve 20 adaptable to the installation position of the gearbox.

As in the 4 and 7 is shown in an interior of the housing 22 a connecting the first and second output side connecting web, which at the lid 100 opposite housing wall in the input side half of the housing 22 is arranged. In the web, a first bearing receptacles is worked out in a through opening, in which a first screw bearing 30 is arranged. An outer ring of the first screw bearing 30 supports input side on a circumferential shoulder of the through hole.

In a housing wall, which is the Eintriebsseite opposite, a second bearing receptacle is incorporated in a continuous, circular, cylindrically reinforced recess of the housing. In the second bearing seat is a second worm bearing 37 arranged. One of the Eintriebsseite opposite side of an outer ring of the second screw bearing 37 supported by a support disk 137 and a first shim 506 on a second circlip 39 axially. The second circlip 39 is locked in a circumferential groove of the second bearing mount. In the incision is a flush with an outer housing wall final cap 131 brought in.

The first and second screw bearings 30 . 37 are preferably designed as rolling bearings in particular as angular contact ball bearings or tapered roller bearings.

The worm shaft 5 is supported by the first and second worm bearing in the housing. On the worm shaft 5 is a worm gear between the first and second worm bearing 30 . 37 arranged. From the worm gear to the first and second worm bearings 30 . 37 the worm shaft widens 5 frustoconical on. This causes shoulders in the worm shaft 5 formed, against which the respective inner ring of the first and second screw bearing 30 . 37 pending.

An end section of the worm shaft 5 protrudes inside the case 22 towards the input side via the first worm bearing 30 or over the continuous opening in the web and thus forms a freestanding stub shaft. On the freestanding stub shaft is a gear 2 in flying arrangement by means of a gear key 43 secured against rotation.

Axial is the gear 2 through another shoulder in the worm shaft and a third circlip 61 fixed.

The worm shaft 5 is preferably made of surface hardened case hardening steel such as 16MnCrS5. The worm toothing is advantageously ground.

In the circular opening or the corresponding housing portion of the first output side is an output bearing 11 arranged. Correspondingly, a bearing is in the second output side 25 arranged. The output bearing 11 and the camp 25 are preferably designed as deep groove ball bearings or tapered roller bearings.

An output shaft designed as a hollow shaft 7 is from the output bearing 11 and the camp 25 in the case 22 stored.

A worm wheel 6 is by means of a Schneckenradpassfeder 19 rotatably on the output shaft 7 between the output bearing 11 and the camp 25 arranged. As in 6 shown is the worm wheel 6 in the axial direction on the one hand by a shaft stage in the output shaft 7 and on the other hand via a spacer ring 17 from an inner ring of the output bearing 11 fixed. An outer ring of the output bearing 11 supported by a second shim 518 on a mounted in the circular opening of the first output side first securing ring. An inner ring of the bearing 25 supports itself in the direction of the worm wheel 6 on a shaft stage in the output shaft 7 from. An outer ring of the bearing 25 supported by a fourth shim 521 on a fourth circlip 88 from.

Preferably, the worm shaft is designed as a cylindrical worm and the worm wheel as a globoid worm wheel. The worm wheel 6 has an inner wheel with a shell of bronze or gray cast iron. The inner wheel is preferably made of steel. The jacket is welded to the inner wheel.

The gear 2 and the pinion 1 preferably have a helical toothing, in particular an involute toothing. The pinion meshes with the gear and the worm wheel 6 with the worm gear on the worm shaft 5 , Thus, it is a two-stage worm gear with a spur gear. As in the 1 . 2 and 3 to see is the spacer ring 17 also in one piece with the worm wheel 6 or the inner wheel of the worm wheel 6 malleable.

In the output shaft 7 as a hollow shaft is a hollow shaft locking ring in one end portion 91 arranged on which a screw 94 over a spring washer 93 and a slice 92 supported. The screw 94 serves to mount a driving shaft of a device to be driven. Next is a fit protection in an area of the hollow shaft 990 appropriate. The hollow shaft is at the end portion by a first hollow shaft closure 95 closable and at the opposite end portion by a second hollow shaft closure 168 , This allows the transport of the worm gear without contamination of the hollow shaft.

One between the output shaft 7 and the housing 22 remaining opening is on the first output side through a first shaft seal 9 sealed and on the second output side with a second shaft seal 183 ,

5 shows a torque arm 335 which is attachable to the housing area around the circular openings by utilizing the further blind holes. The torque arm 335 comprises two different sized circular elements, which are connected via two legs, forming a triangle with each other. The larger circle element is shaped to match the housing area around the torque arm 335 on the housing 22 to fix. The smaller circular element is of a cylindrical damping element 336 with internal, protruding socket 337 filled and used to attach the torque arm to a stationary object.

8th and 9 show a further embodiment of the output shaft as a hollow shaft with a shrink disk 98 for fixing the input shaft of a device to be driven. In 8th is a cover 99 co-rotating with the output shaft 7 connected. In 9 is a cover 99 to see which by means of fastening screws on the housing 22 opposite the output shaft 7 is arranged rotationally fixed.

The 2 . 3 and 4 show an inventive worm gear with an output shaft designed as a solid shaft 7 , The housing portion is tapered in these embodiments stumpy reinforced. In the in 2 the embodiment shown protrudes the output shaft 7 out of the first and second output side. At outstanding sections of the output shaft 7 is a first feather key 8th or a second key 80 appropriate. In the embodiment in 3 protrudes the output shaft 7 only from the first output side and has a feather key 8th on. The circular opening of the second output side is through a bearing cap 89 locked. This is the second shaft seal 183 superfluous.

The the cover side opposite housing side as well as the Eintriebsseite opposite side in a contiguous subarea by an edge strengthened. The edge has mounting holes with which the worm gear can be fastened to a holder.

For a low-backlash version of the worm gear are the gear 2 and the worm wheel 6 with the stub shaft of the worm shaft 5 or the output shaft 7 bonded.

In an embodiment not shown is a flange the housing portion of the first and / or second output side attached. The corresponding housing area is cylindrical strengthened. The other blind holes are used to screw of the flange. This again shows the high flexibility a worm gear according to the invention.

1

pinion

2

gear

5

worm shaft

6

worm

7

output shaft

8th

first Adjusting spring

9

Shaft seal

11

output bearing

12

first circlip

17

spacer tube

19

Schneckenradpassfeder

20

vent valve

22

gearbox

24

eyelet

25

camp

29

sealant

30

first worm bearing

37

second worm bearing

39

second circlip

43

Gear keyway

59

Screw

61

third circlip

80

second Adjusting spring

88

fourth circlip

89

Bearing cap

91

Hollow shaft locking ring

92

disc

93

spring washer

94

screw

95

first Hollow shaft closure

98

shrink disc

99

cover

100

cover

101

cover screw

102

poetry

131

cap

137

support disc

138

sealing element

158

first sealing plug

159

second sealing plug

160

third sealing plug

165

fourth sealing plug

167

fifth sealing plug

168

second Hollow shaft closure

172

seventh sealing plug

173

eight sealing plug

183

second Shaft seal

335

torque arm

506

first shim

518

second shim

516

third shim

521

fourth shim

990

Passungsschutz

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 8712502 U1 [0002]

Claims (15)

Worm gear, which has a housing, a Worm shaft and an output shaft includes, the case an approximately cuboid basic body forms and the housing a Eintriebsseite, a perpendicular thereto first output side and one of the first output side opposite second Has output side, wherein in the input side approximately a continuous recess is arranged centrally, being on the Eintriebsseite to the continuous recess an annular Reinforcement is worked out, in which blind holes are internally threaded, so that a drive unit like a motor or a gearbox flanged to the housing is wherein the first and the second output side each one congruent opposite, circular opening exhibit, wherein a housing portion around the circular openings truncated or cylindrically reinforced and worked out as a camp admission, one being the input side and the housing wall connecting the first and second output sides designed as a lid, the input side has a step, which facing the input side behind the annular reinforcement begins and extends to the lid side, so is an area the step parallel to the cover and perpendicular to the input side, in which the housing and the cover through-holes with internal thread in which a closure screw or a vent valve is screwed in, being in an interior of the housing formed a connecting the first and second output side web is, which on the housing wall opposite the lid arranged in the input side half of the housing is being in the web in a through opening a first bearing recordings is worked out in which a first Worm bearing with an outer ring on the input side against a circumferential shoulder of the through opening is present, in which in a housing wall opposite to the input side is a second bearing seat in a continuous, circular, cylindrical reinforced recess of the housing is incorporated and in the second bearing receiving a second screw bearing through a second locking ring via a support disk on a side facing away from the Eintriebsseite an outer ring the second screw bearing is axially supported, in which the worm shaft from the first and second worm bearing in the housing is stored, wherein a worm toothing between the first and second screw bearing is arranged on the worm shaft and an end portion of the worm shaft over the first one Worm bearing or over the continuous opening in the web away to the drive side inside the housing forms a freestanding shaft journal on which a gear in arranged in a flying arrangement, being a pinion, which through the recess into the interior of the housing protrudes, with the gear meshes, being in the circular opening the first output side an output bearing is arranged and in the circular opening of the second output side a warehouse is arranged an output shaft from the output bearing and the bearing is mounted in the housing, being a worm wheel is arranged on the output shaft between the output bearing and the bearing and mesh with the worm gear. Worm gear according to claim 1, characterized that the worm gear as a cylindrical worm and the worm wheel are designed as a globoidisches worm wheel. Worm gear according to one of the preceding Claims, characterized in that the worm wheel an inner wheel, which is preferably made of steel, with a shell of bronze or gray cast iron. Worm gear according to claim 3, characterized that the casing welded on the inner steel wheel is. Worm gear according to one of the preceding Claims, characterized in that the gear and the pinion have a helical toothing, in particular an involute toothing. Worm gear according to one of the preceding Claims, characterized in that the output shaft is designed as a solid shaft and from the first output side and / or the second output side protrudes. Worm gear according to one of the preceding Claims, characterized in that the output bearing, the bearing and the first and second bearings as rolling bearings are executed. Worm gear according to one of the preceding Claims, characterized in that the output bearing and the bearing designed as deep groove ball bearings or tapered roller bearings are. Worm gear according to one of the preceding Claims, characterized in that the first and second Worm bearings as angular contact ball bearings or tapered roller bearings are executed. Worm gear according to one of the preceding Claims, characterized in that centered in the stage a wall protrudes vertically and the wall is circular Has passage opening. Worm gear according to one of the preceding Claims, characterized in that the worm shaft made of hardened surface hardened steel in particular 16MnCrS5 is manufactured and the worm toothing is ground. Worm gear according to one of the preceding Claims, characterized in that the worm wheel by means of a Schneckenradpassfeder rotationally fixed on the output shaft is arranged and the gear by means of a gear key on The shaft stub is arranged rotationally fixed. Worm gear according to one of the preceding Claims, characterized in that the gear and glued the worm wheel with the stub shaft or the output shaft are. Worm gear according to one of the preceding Claims, characterized in that the output shaft is designed as a hollow shaft. Worm gear according to one of the preceding Claims, characterized in that a torque arm at the housing area around the circular openings is appropriate.