CN2888182Y

CN2888182Y - Gearbox with overload protection

Info

Publication number: CN2888182Y
Application number: CN 200620102877
Authority: CN
Inventors: 金江波; 申屠君
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-19
Filing date: 2006-04-19
Publication date: 2007-04-11
Anticipated expiration: 2016-04-19

Abstract

The utility model relates to a gearbox, especially the gear worm gearbox with overload protection. The gearbox has worm shaft and worm wheel shaft, the central axis of two shafts is vertical, the worm and wheel are meshed and a clutch is arranged on the worm wheel shaft, the clutch can positioned on both sides of worm wheel, one side of clutch is arranged with elastic packer. The advantageous effect of utility model is with rational design, simple structure, easy for machining and convenient for production, safety operation, can avoid accident of equipment damage caused by overload, thus the product has extensive applications value.

Description

The gear-box of band overload protection

Technical field

The utility model relates to a kind of gear-box, is meant a kind of worm and gear gear-box with overload protection especially.

Background technique

Worm-gear speed reducer is widely used for the reduction gearing mechanism of motor; especially on industry equipment; but the deficiency that the worm-gear speed reducer of prior art in use exists is not have overload protection function; in case equipment breaks down; speed reducer can not quit work, and can only work on until with device damage.

In order to address this problem; designed a kind of overload protection worm speed reducer (patent publication No.: 96227133); worm screw is processed the logical sky in center; rotate in the left end; the two ends of worm screw are by the bottom of bearing fixing at casing; the tooth of worm screw left end exposes from the left side of bearing; join with the coupling that has tooth; the cross section of the residing one section transmission shaft of coupling is a rectangle; can drive coupling rotates synchronously; thereby drive worm screw again and rotate, the dynamics that is connected of coupling and worm screw is to finish by the spring on the coupling left side, the nut of adjusting the transmission shaft left end just adjustable springs compresses the dynamics of coupling.The size of dynamics is as the criterion can drive the running of worm gear rotation drive complete equipment, the dynamics of worm drive worm gear becomes big when in a single day equipment break down, the dynamics that coupling drives the worm screw rotation also will strengthen, when surpassing certain limit, when the pressure of coupling that spring imposes on can not be kept the interlock interlock of coupling and worm screw again, the tooth that coupling and worm screw are joined just produces slip, worm screw is just no longer rotated, thereby equipment quits work, coupling and worm screw knock and ring to warn to operator, but this design exists and can't work stably, is easy to generate the destruction to coupling, and can not conveniently regulates overload torque.

Summary of the invention

The utility model mainly solves the existing problem that does not have overload protection in the prior art, and a kind of gear-box of novel band overload protection is provided, and has improved the safety in utilization of worm and gear gear-box.

Also solve simultaneously in the prior art existing operation not steadily, can not make things convenient for the problem of accurately regulating overload torque; a kind of novel gear-box that operates steadily, can make things convenient for the band overload protection of accurately regulating overload torque is provided, has improved worm and gear gear-box service behaviour.

For fear of destroying worm and worm gear, the loss of minimizing equipment, the convenient overload torque of regulating accurately improves the safety in utilization and the service behaviour of equipment, and the gear-box that designs a kind of novel band overload protection is necessary.

Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of gear-box with overload protection; be provided with worm shaft and worm-wheel shaft in the casing; the central axis of diaxon becomes antarafacial vertical; worm and wheel matches; and on described worm-wheel shaft, be provided with engaging and disengaging gear; engaging and disengaging gear places the worm gear both sides, and a side of engaging and disengaging gear is provided with resilient pad.Resilient pad can be positioned between engaging and disengaging gear and the rolling bearing B, is provided with the adjustment pad between resilient pad and the rolling bearing B, as long as change to adjust pad, just can be provided with different turn round according to the time clutch separation.

As preferably, described engaging and disengaging gear is made up of clutch collet and clutch wheel, the clutch collet places between sliding bearing and the worm gear, be placed on the worm-wheel shaft, clutch wheel places between worm gear and the resilient pad, be placed on the worm-wheel shaft, all be provided with the friction pad between clutch collet, clutch wheel and the worm gear, the friction pad is placed on the circle ring column of two surperficial dimplings of worm gear.The friction pad be for increase clutch wheel, clutch collet and worm gear frictional force, it is that to be enclosed within worm gear lip-deep.

As preferably, described casing is provided with a cavity, the cavity both sides are provided with bearing support, be provided with sliding bearing, clutch collet and worm gear etc. successively on the worm-wheel shaft spindle nose from the inside to surface, spindle nose is provided with pin-and-hole, makes worm-wheel shaft be connected with the clutch collet by pin, is provided with clutch wheel, resilient pad, adjustment pad and rolling bearing B etc. on the worm-wheel shaft axle journal successively, rolling bearing B leans on mutually with the shaft shoulder, and the shaft shoulder is provided with circlip for hole B and oil sealing B.What rolling bearing B adopted here is the bearing of 6304 models, and circlip for hole B is the back-up ring that adopts A type Φ 55, and oil sealing B is that the employing model is 6904 oil sealing.

As preferably, be provided with the friction pad between described clutch collet and the worm gear, be provided with the friction pad between clutch wheel and the worm gear, the diameter of friction pad, clutch collet and clutch wheel is smaller or equal to worm gear surface tooth root diameter of a circle, and the friction pad is placed on the annulus post that worm gear surface dimpling goes out.

As preferably, described clutch collet is provided with flange, and the flange upper surface is provided with and is both the sliding bearing that is provided with flange, and the counterface and the bearing support end face of sliding bearing, clutch collet and worm-wheel shaft have the space.

As preferably, the both sides, hole at described worm shaft place are provided with bearing support, plastic sliding bearing cooperates with worm shaft spindle nose end face, embed in the inner shafts bearing, worm shaft outboard shafts bearing is provided with oil sealing A, rolling bearing A and two circlips from the inside to surface successively, two circlips are respectively circlip for hole A and circlip for shaft, and the end face in hole is provided with chamfering.Circlip for shaft is the back-up ring that adopts A type Φ 19, and circlip for hole A adopts A type Φ 40 back-up rings, and oil sealing A is that the employing model is 6904 oil sealing, and rolling bearing A is the 6904ZZ bearing.

As preferably, the design that is structure as a whole of described worm-wheel shaft and sprocket wheel, the design that also is structure as a whole of worm screw on the worm shaft and axle journal.

The beneficial effects of the utility model are: reasonable in design, simple in structure, be easy to processing, characteristics such as easily manufactured, safe in utilization, and avoid the accident of the device damage that electromechanical equipment produces because of overload, thereby have very wide using value.

Description of drawings

Fig. 1 is that a kind of master of the utility model gear-box looks cross-sectional schematic.

Fig. 2 be the utility model gear-box a kind of A-A face overlook cross-sectional schematic.

Among the figure: 1-circlip for shaft, 2-circlip for hole A, 3-rolling bearing A, 4-oil sealing A, the 5-worm screw, 6-plastic sliding bearing, 7-casing, 8-sliding bearing, 9-pin, 10-clutch collet, the 11-pad that rubs, the 12-worm gear, the 13-clutch wheel, the 14-resilient pad, 15-adjusts pad, 16-rolling bearing B, 17-circlip for hole B, 18-oil sealing B, 19-worm-wheel shaft, cavity-20, sprocket wheel-21, worm shaft-22.

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment 1: a kind of gear-box with overload protection of present embodiment; cast out casing 7 earlier; after the tank body blank fine finishing; earlier plastic sliding bearing 6 and sliding bearing 8 are pressed into the bearing saddle bore that casing is provided with; install again worm-wheel shaft 19 and on parts; earlier rolling bearing B16 is installed the worm-wheel shaft axle journal; be close to the shaft shoulder; put again and adjust pad 15; then set up resilient pad 14 and clutch wheel 13; the pad 11 that will rub is enclosed within on the worm gear 12; worm gear is each a slice friction pads up and down; again worm gear is installed on the spindle nose; set up clutch collet 10 again; then pin 9 is inserted on the spindle nose; the clutch collet links together by pin and worm-wheel shaft; the clutch collet is equipped with sliding bearing 8 outward; sliding bearing cooperates with casing; parts major part on the worm-wheel shaft has installed; worm-wheel shaft is packed in the casing; again circlip for hole B16 is packed in the groove of axis hole; oil sealing B18 is filled in the outside; after installing worm-wheel shaft; an amount of lubricant oil is added in the casing, worm shaft 22 has been installed again, earlier oil sealing A4 is pressed into the indoor and rolling bearing A3 of oil sealing that casing is provided with and pacifies to the axle journal of worm shaft; just worm shaft can be packed in the casing, install circlip for shaft 1 and circlip for hole A2 at last.

During use; when motor during from worm shaft input power; worm screw drives worm gear and rotates; worm gear is again by the sprocket wheel outputting power on the worm-wheel shaft; in the time of overload; clutch wheel just breaks away from worm gear and contacts; compressing resilient pad pushes to the bearing direction; will make worm gear and axle step-out like this, can not coordinate rotation always, so just reach the effect of protection; by adjusting the thickness of pad; can be adjusted in that clutch shields under the different overload torques, designing requirement is a clutch mustn't transmission less than 37Nm here, must slide greater than 50Nm.

Claims

1. gear-box with overload protection; be provided with worm shaft (22) and worm-wheel shaft (19) in the casing (7); the central axis of diaxon becomes antarafacial vertical; worm screw (5) is matched with worm gear (12); it is characterized in that on described worm-wheel shaft (19), being provided with engaging and disengaging gear; engaging and disengaging gear places worm gear (12) both sides, and a side of engaging and disengaging gear is provided with adjusts pad (14).

2. the gear-box of band overload protection according to claim 1; it is characterized in that described engaging and disengaging gear is made up of clutch collet (10) and clutch wheel (13); clutch collet (10) places between sliding bearing (8) and the worm gear (12); be placed on the worm-wheel shaft (19); clutch wheel (13) places worm gear (12) and adjusts between the pad (14); be placed on the worm-wheel shaft (19); all be provided with a slice friction pad (11) between clutch collet (10), clutch wheel (13) and the worm gear (12), friction pad (11) is placed on the circle ring column of two surperficial dimplings of worm gear (12).

3. the gear-box of band overload protection according to claim 1 and 2; it is characterized in that described casing (7) is provided with a cavity (20); casing (7) both sides are provided with bearing support; be provided with sliding bearing (8) successively on worm-wheel shaft (19) spindle nose from the inside to surface; clutch collet (10) and worm gear (12) etc.; spindle nose is provided with pin-and-hole; make worm-wheel shaft (19) be connected by pin (9) with clutch collet (10); be provided with clutch wheel (13) successively on worm-wheel shaft (19) axle journal; resilient pad (14); adjust pad (15) and rolling bearing B (16) etc.; rolling bearing B (16) leans on mutually with the shaft shoulder, and the shaft shoulder is provided with circlip for hole B (17) and oil sealing B (18).

4. the gear-box of band overload protection according to claim 1 and 2; it is characterized in that being provided with between described clutch collet (10) and the worm gear (12) friction pad (11); be provided with friction pad (11) between clutch wheel (13) and the worm gear (12); the diameter of friction pad (11), clutch collet (10) and clutch wheel (13) is smaller or equal to the surperficial tooth root diameter of a circle of worm gear (12), and the pad (11) that rubs is placed on the annulus post that the surperficial dimpling of worm gear (12) goes out.

5. the gear-box of band overload protection according to claim 3; it is characterized in that being provided with between described clutch collet (10) and the worm gear (12) friction pad (11); be provided with friction pad (11) between gag and the worm gear (12); the diameter of friction pad (11), clutch collet (10) and clutch wheel (13) is smaller or equal to the surperficial tooth root diameter of a circle of worm gear (12), and the pad (11) that rubs is placed on the annulus post that the surperficial dimpling of worm gear (12) goes out.

6. the gear-box of band overload protection according to claim 1 and 2; it is characterized in that described clutch collet (10) is provided with flange; the flange upper surface is provided with and is both the sliding bearing (8) that is provided with flange, and the counterface and the bearing support end face of sliding bearing (8), clutch collet (10) and worm-wheel shaft (19) have the space.

7. the gear-box of band overload protection according to claim 3; it is characterized in that described clutch collet (10) is provided with flange; the flange upper surface is provided with and is both the sliding bearing (8) that is provided with flange, and the counterface and the bearing support end face of sliding bearing (8), clutch collet (10) and worm-wheel shaft (19) have the space.

8. the gear-box of band overload protection according to claim 1 and 2; the both sides, hole that it is characterized in that described worm shaft (22) place are provided with bearing support; plastic sliding bearing (6) cooperates with worm shaft (22) spindle nose end face; embed in the inner shafts bearing; worm shaft (22) outboard shafts bearing is provided with oil sealing A (4), rolling bearing A (3) and two circlips from the inside to surface successively; two circlips are respectively circlip for hole A (2) and circlip for shaft (1), and the end face in hole is provided with chamfering.

9. the gear-box of band overload protection according to claim 3; the both sides, hole that it is characterized in that described worm shaft (22) place are provided with bearing support; plastic sliding bearing (6) cooperates with worm shaft (22) spindle nose end face; embed in the inner shafts bearing; worm shaft (22) outboard shafts bearing is provided with oil sealing A (4), rolling bearing A (3) and two circlips from the inside to surface successively; two circlips are respectively circlip for hole A (2) and circlip for shaft (1), and the end face in hole is provided with chamfering.

10. the gear-box of band overload protection according to claim 1 and 2 is characterized in that the design that is structure as a whole of described worm-wheel shaft (19) and sprocket wheel (21), the design that also is structure as a whole of worm screw (5) on the worm shaft (22) and axle journal.