CN202220831U - Worm gear speed reducer - Google Patents
Worm gear speed reducer Download PDFInfo
- Publication number
- CN202220831U CN202220831U CN2011203729547U CN201120372954U CN202220831U CN 202220831 U CN202220831 U CN 202220831U CN 2011203729547 U CN2011203729547 U CN 2011203729547U CN 201120372954 U CN201120372954 U CN 201120372954U CN 202220831 U CN202220831 U CN 202220831U
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- worm
- casing
- end cover
- rear end
- bearing
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Abstract
The utility model discloses a worm gear speed reducer, which comprises a casing, a front end cover, a rear end cover, a worm, an output shaft and a worm gear, wherein guide holes are arranged on two side walls of the casing, the worm is mounted on the casing, the output shaft penetrating through an output end of the casing is mounted on the casing, and the worm gear is fixed onto the output shaft and meshed with the worm. Two ends of the worm are mounted on the casing through the front end cover and the rear end cover. Each of the front end cover and the rear end cover is provided with an eccentric cavity, and radial movement of the worm can be realized by rotating the front end cover and the rear end cover so as to change the distance between the worm gear and the worm and further eliminate the radial meshing gap between the worm gear and the worm. A locking knob and an adjusting pressure plate are further arranged on the front end cover, and axial movement of the worm can be realized by means of the locking knob so as to eliminate the axial meshing gap between the worm and the worm gear.
Description
Technical field
The utility model relates to retarder, is specifically related to a kind of worm type of reduction gearing.
Background technique
Worm type of reduction gearing is a kind of retarder commonly used.Compare with other retarders, worm type of reduction gearing has self unique advantage, can realize the Vertical direction transmission.And worm type of reduction gearing also has advantages such as compact structure, velocity ratio be big, makes it enjoy favor in mechanical industry.
For the ease of the assembling and the engagement of worm and gear, secundum legem can be provided with different attenuate amounts according to different accuracy with the tooth root of worm and gear., this will cause worm and gear after assembling, just to have the gap, and after wearing and tearing after a while, its back lash can be bigger.This will make the worm type of reduction gearing can't held stationary in when operation, even when operation, counter-rotational problem occur when stopping, and have a strong impact on the transmission and the working efficiency of worm type of reduction gearing.
The model utility content
To the deficiency of existing technology, the purpose of the utility model is intended to provide a kind of worm type of reduction gearing, and it can effectively eliminate the back lash between worm gear and worm screw.
For realizing above-mentioned purpose, the utility model adopts following technological scheme;
Worm type of reduction gearing, comprise the two side be provided with the casing of guide hole, front cover, rear end cover, be installed in worm screw on the casing, be installed on the casing from casing pass output terminal output shaft, be fixed on the output shaft and with the worm gear of worm meshing; The two ends of worm screw are installed on the casing through front cover and rear end cover; Be provided with on front cover, the rear end cover,
The cartridge part is flush-mounted in the guide hole of casing, also is provided with the interspersed chamber in end that supplies worm screw on the cartridge part, and the axis of the relative cartridge part of axis of chamber radially staggers;
Lip part, in the form of annular discs, its diameter is bigger than cartridge part diameter; This lip part is fixed in cartridge part and coaxial with the cartridge part, on the end face of this lip part and along its axis circumference array a plurality of through holes are being arranged near peripheral region;
The two side of casing is provided with and said through hole corresponding second through hole.
Also be provided with the positioning hole that is communicated with the chamber of rear end cover on the rear end cover; The chamber of rear end cover is fixed with bearing and seal ring along its axis, and worm screw is plugged in the inner ring of bearing and the inner ring of seal ring successively, and the end of worm screw passes from positioning hole; Seal ring is between bearing and positioning hole.
Front cover is provided with the internal point that is communicated with the chamber of front cover; The chamber of front cover is fixed with second bearing, and the other end of worm screw is plugged in the inner ring of second bearing; Between the internal point and second bearing, being provided with one presses in the adjustment pressing plate of second bearing, one side; Worm type of reduction gearing also comprise one with internal point be spirally connected and can be connected to the adjustment pressing plate locking knob.
The lead angle of worm screw is less than 5
0
The worm type of reduction gearing that the utility model is set forth, its beneficial effect is:
1, cover the cavity that is provided with off-centre at front and back ends, can realize moving radially of worm screw, thereby change the distance of worm gear and worm screw through rotating forward and backward end cap, and then the radially back lash of eliminating worm and gear;
2, on front cover, also be provided with locking knob and adjustment pressing plate, can realize moving axially of worm screw through locking knob, thereby eliminate the axial back lash of worm and wheel.
Description of drawings
Fig. 1 partly cuts open the plan view of form for the employing of a kind of worm type of reduction gearing of the utility model;
Fig. 2 partly cuts open the plan view of form for the employing of Fig. 1;
Fig. 3 is the rear end cover structural representation of Fig. 1;
Fig. 4 is the front cover structural representation of Fig. 1.
Embodiment
Below, in conjunction with accompanying drawing and embodiment, the worm type of reduction gearing of the utility model done further describing, so that clearerly understand the utility model technological thought required for protection.
The preferred implementation of the worm type of reduction gearing of the utility model is like Fig. 1,2,3, shown in 4.Worm type of reduction gearing comprise casing 1, with case lid 6, Worm and worm-wheel gearing, front cover 3 and the rear end cover 5 of casing 1 coupling.Casing 1 respectively is provided with a guide hole on the two side along its length.Casing 1 forms a cavity that supplies Worm and worm-wheel gearing to place with case lid 6 assembling backs.The line shaft of this driving mechanism is the worm screw 2 that connects with power equipment, and the axis of worm screw 2 is consistent with the length direction of casing.With its power output, concrete is that the output terminal of output shaft 7 passes from casing 1, and connects with driven equipment to this driving mechanism through output shaft 7.The axis of output shaft 7 is consistent with the width direction of casing.In order to realize the transmission of power, comprise also in the driving mechanism that one is connected in the worm gear 8 of output shaft 7 with worm screw 2 engagement and through key.The axis of worm gear 8 is consistent with the width direction of casing, promptly is parallel to the axis of output shaft 7.
The two ends of worm screw 2 are installed on the casing 1 through front cover 3 and rear end cover 5.Rear end cover 5 includes and the cartridge part of guide hole internal diameter coupling, the lip part coaxial with the cartridge part.It is one round table-like that this lip part is, and it is fixed in the cartridge part, and the diameter of lip part is greater than the diameter of cartridge part.For the ease of supporting worm screw 2, the positioning hole 52 that rear end cover 5 is provided with chamber and runs through with chamber.Said chamber can be divided into Bearing Installation chamber 51, be arranged at the seal ring installation cavity 53 between Bearing Installation chamber 51 and the positioning hole 52.Positioning hole 52 is through to the end face of rear end cover 5, and the rear end that can be convenient to worm screw 5 passes with motor from casing 1 and connects.Adding the axis that must be noted that bearing mounting hole 51, positioning hole 52, seal ring mounting hole 53 threes man-hour need overlap.During assembling, fasten a bearing 56 in Bearing Installation chamber 51, can the sliding friction of worm screw 2 and chamber be converted into rolling friction, the loss of reducing friction, and then make worm screw 2 reach good rotary state.In order to prevent that lubricant oil from sewing from rear end cover 5, and be passed to power equipment through worm screw 2, the inventor is designed with seal ring 57 on seal ring installation cavity 53.Because seal ring 57 is arranged between the inwall of circumferential surface and chamber of worm screw 2, can play a good sealing effect.At last worm screw 2 is plugged in the inner ring of bearing 56, the inner ring of seal ring 57, its output terminal passes from positioning hole 52; When treating that worm screw 2 is in place, rely on the shaft shoulder of worm screw 2 to realize the axially locating of worm screw 2.In order rear end cover to be fixed on the casing 1, also on the end face of the lip part of rear end cover 5 and along the axis circumference array of rear end cover a plurality of through holes 54 are being arranged near peripheral region.And be provided with the through hole corresponding on the two side of casing 1 with through hole 54.For the adjustment of the radial clearance that can realize worm and worm wheel, the inventor is with the radial axis of the relative cartridge part of axis of the cavity eccentricity value d that staggers.Eccentricity value d defines the maximum value that worm screw moves radially, so distance value d can design according to the radial wear of reality.During installation, the cartridge part setting-in is gone in the guide hole of casing 1, the inwall of lip part is close on the outer wall of casing, and passes through the through hole of screw bolt passes rear end cover 5 and the through hole of casing 1, and then rear end cover 5 is locked on the casing 1.
Similar with rear end cover 5, front cover 3 also is provided with lip part and the cartridge part coaxial with lip part.Also be provided with the cavity 31 that supplies worm screw 2 plug-in mountings on the cartridge part.The internal diameter of cavity 31 and the external diameter of bearing are complementary, and the width of its depth ratio bearing is long.The axis of cavity 31 and the axis of the cartridge part eccentricity value that also radially staggers.In order to guarantee the amount of the moving radially unanimity at worm screw 2 two ends, the eccentricity value of front cover 3 must be consistent with the eccentricity value of rear end cover 5.The center of lip part also is provided with the internal point 32 that is communicated with cavity 31 and extends along the lip part axis, and internal point 32 is provided with internal thread.The lip part end face also has a plurality of through holes 33 near peripheral region along its axis also circumference array.During assembling, in cavity 31, the other end with worm screw is fixed on the inner ring of bearing then with bearing fixing in elder generation.And between bearing and internal point 32, also be equipped with the adjustment pressing plate 4 that presses in a side of bearing.Worm type of reduction gearing comprises that also one is bolted in the locking knob 9 on the internal point 32.Cooperating of internal thread through the preset outside threads in locking knob 9 surface and internal point 32, can rotation motion be converted into along the straight line motion of internal point 32 axis.Locking knob 9 passes internal point can be connected to adjustment pressing plate 4.
When big gap appears in worm and gear owing to wearing and tearing, can rotate front cover 3 and rear end cover 5 synchronously, current, rear end cover is in the time of its rotational, and cavity also rotates along with the motion of end cap, and then drives bearing and screw rod rotates.Because the axis of the cavity of forward and backward end cap and the axis of forward and backward end cap all differ an eccentricity value; So in rotary course; Cavity is equivalent to an eccentric opening, can realize moving radially of worm screw 2 through its rotation; Thereby the radial distance of adjustment adjustment worm screw 2 and worm gear 8, and then the radially back lash of eliminating worm and worm wheel.When worm screw 2 moves into place, can the front and back ends cover lock be scheduled on the casing 1, thus the location of realization worm screw 2.In order to eliminate the axial back lash of worm and worm wheel, can be through regulating locking knob 9.Because an end of locking knob 9 can pass positioning hole 32 and be connected on the adjustment pressing plate 4, so, it is acted on the adjustment pressing plate 4 through locking knob 9 is applied pretightening force; When pretightening force puts on the pressure on the adjustment pressing plate 4 greater than bearing, the surface of contact generation deformation of adjustment pressing plate 4 and bearing, and then to thrust of bearing generation, thereby realize the axial displacement of bearing and worm screw.
In order to prevent the worm type of reduction gearing counter-rotating, the lead angle of inventor worm screw 2 is set to a smaller value, and its preferable range is less than 5
0, make worm gear and endless screw speed changer have auto-lock function, that is to say and can only drive worm gear by worm screw, and worm gear can't drive worm screw, thereby realize safety protection machinery.
Those skilled in the art can make other various corresponding changes and deformation, and these all changes and deformation should belong within the protection domain of the utility model claim all according to the technological scheme and the design of above description.
Claims (4)
1. worm type of reduction gearing, comprise the two side be provided with the casing of guide hole, front cover, rear end cover, be installed in worm screw on the casing, be installed on the casing from casing pass output terminal output shaft, be fixed on the output shaft and with the worm gear of worm meshing; The two ends of worm screw are installed on the casing through front cover and rear end cover; It is characterized in that: be provided with on front cover, the rear end cover,
The cartridge part is flush-mounted in the guide hole of casing, also is provided with the interspersed chamber in end that supplies worm screw on the cartridge part, and the axis of the relative cartridge part of axis of chamber radially staggers;
Lip part, in the form of annular discs, its diameter is bigger than cartridge part diameter; This lip part is fixed in cartridge part and coaxial with the cartridge part, on the end face of this lip part and along its axis circumference array a plurality of through holes are being arranged near peripheral region;
The two side of casing is provided with and said through hole corresponding second through hole.
2. worm type of reduction gearing as claimed in claim 1 is characterized in that: also be provided with the positioning hole that is communicated with the chamber of rear end cover on the rear end cover; The chamber of rear end cover is fixed with bearing and seal ring along its axis, and worm screw is plugged in the inner ring of bearing and the inner ring of seal ring successively, and the end of worm screw passes from positioning hole; Seal ring is between bearing and positioning hole.
3. worm type of reduction gearing as claimed in claim 1 is characterized in that: front cover is provided with the internal point that is communicated with the chamber of front cover; The chamber of front cover is fixed with second bearing, and the other end of worm screw is plugged in the inner ring of second bearing; Between the internal point and second bearing, being provided with one presses in the adjustment pressing plate of second bearing, one side; Worm type of reduction gearing also comprise one with internal point be spirally connected and can be connected to the adjustment pressing plate locking knob.
4. worm type of reduction gearing as claimed in claim 1 is characterized in that: the lead angle of worm screw is less than 5
0
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203729547U CN202220831U (en) | 2011-09-30 | 2011-09-30 | Worm gear speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203729547U CN202220831U (en) | 2011-09-30 | 2011-09-30 | Worm gear speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202220831U true CN202220831U (en) | 2012-05-16 |
Family
ID=46042858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203729547U Expired - Fee Related CN202220831U (en) | 2011-09-30 | 2011-09-30 | Worm gear speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202220831U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734390A (en) * | 2012-07-02 | 2012-10-17 | 江阴凯迈机械有限公司 | Gap-adjustable slewing drive device |
| CN102937175A (en) * | 2012-11-21 | 2013-02-20 | 中国船舶重工集团公司第七〇五研究所 | Worm drive meshing gap adjustment device |
| CN105414995A (en) * | 2015-12-30 | 2016-03-23 | 沈机集团昆明机床股份有限公司 | Transmission device, driving system adopting same as well as rotating table |
| CN109539991A (en) * | 2019-01-25 | 2019-03-29 | 吉林大学 | The rotary detection system of rail vehicle axle head grounding device abrasion loss |
-
2011
- 2011-09-30 CN CN2011203729547U patent/CN202220831U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734390A (en) * | 2012-07-02 | 2012-10-17 | 江阴凯迈机械有限公司 | Gap-adjustable slewing drive device |
| CN102937175A (en) * | 2012-11-21 | 2013-02-20 | 中国船舶重工集团公司第七〇五研究所 | Worm drive meshing gap adjustment device |
| CN105414995A (en) * | 2015-12-30 | 2016-03-23 | 沈机集团昆明机床股份有限公司 | Transmission device, driving system adopting same as well as rotating table |
| CN109539991A (en) * | 2019-01-25 | 2019-03-29 | 吉林大学 | The rotary detection system of rail vehicle axle head grounding device abrasion loss |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120516 Termination date: 20160930 |