CN218468172U - Shutter gear box with stable structure - Google Patents

Abstract

The utility model relates to a shutter accessory technical field, concretely designs a shutter gear box that structure is firm. The louver gear box with the stable structure comprises a motor, a speed reducer, a shell and self-tapping screws; an accommodating cavity is formed in the shell, and the motor and the speed reducer are both arranged in the accommodating cavity; the speed reducer is provided with an installation groove, the shell is provided with an installation hole at a position corresponding to the installation groove, and the self-tapping screw penetrates through the installation hole and is locked in the installation groove; the motor is connected with the speed reducer, and an output shaft of the motor is fixedly connected with an input end of the speed reducer; and the shell is provided with a connecting hole at a position corresponding to the output end of the speed reducer. The utility model provides a current shutter gear box adopt screw and injection moulding's thread groove cooperation to easily lead to on the shutter gear box that the mode of being connected shell and gear box to connect unstable problem.

Description

Shutter gear box with stable structure

Technical Field

The utility model relates to a shutter accessory technical field, concretely designs a shutter gear box that structure is firm.

Background

The electric shutter is popular because of the advantages of ventilation, light transmission, adjustability, convenient use and the like, and the motor can drive the curtain to lift or adjust the angle of the shutter blades by rotating. The motor of traditional electric louver is generally that the louver motor direct mount lacks necessary protection on motor frame or motor track, receives rainwater erosion easily, and is also not clean and tidy pleasing to the eye in the outward appearance, and the motor installation is inconvenient, influences the use.

The utility model discloses a utility model with publication number CN 209545361U discloses an ultra-thin lightweight shutter motor, it protects the motor through setting up outer box, play waterproof dirt-proof effect, the problem that traditional electronic shutter motor exists has been solved with this, can know according to the description and the figure of this patent document, be connected through screw lock solid between shell and gear box, and conventional screwed connection mode is for seting up the lockhole on the shell, and set up the thread groove on the gear box, it makes shell and gear box be connected with thread groove screw-thread fit behind the shell to run through the screw, nevertheless in the shutter gear box, adopt above-mentioned mode to connect to have certain defect, it is inaccurate then arouses the sliding tooth easily to counterpoint when first screw installation, secondly, the internal thread adopts injection moulding, the shrink deformation that injection moulding article arouse along with environment and time variation, lead to the assembly precision poor, and then when this gear box starts, the screw then produces self activity because of the vibration of gear box easily, finally lead to connect unstably on this shutter gear box, influence the control effect to the shutter curtain.

Therefore, it is necessary to provide a technical solution to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a shutter gear box that structure is firm aims at solving current shutter gear box and adopts screw and injection moulding's thread groove cooperation not only to appear smooth tooth easily with the mode that shell and gear box are connected, and the assembly precision is poor, and the screw easily receives the vibration of gear box and produces self activity, leads to on the shutter gear box each part to connect unstable problem.

In order to achieve the above object, the utility model provides a shutter gear box that structure is firm, including motor, reduction gear, shell and self-tapping screw, wherein:

an accommodating cavity is formed in the shell, and the motor and the speed reducer are both arranged in the accommodating cavity; the speed reducer is provided with an installation groove, the shell is provided with an installation hole at a position corresponding to the installation groove, and the self-tapping screw penetrates through the installation hole and is locked in the installation groove; the motor is connected with the speed reducer, and an output shaft of the motor is fixedly connected with an input end of the speed reducer; and the shell is provided with a connecting hole at a position corresponding to the output end of the speed reducer.

More specifically, the reducer comprises an inner gear ring, a first end seat, a second end seat and an output planetary gear set; the first end seat and the second end seat are respectively arranged at two ends of the inner gear ring, and the first end seat is arranged at one end close to the motor; the first end seat and the second end seat are both provided with the mounting grooves; the output planetary gear set comprises an output planetary carrier and a plurality of first gears, the output planetary carrier is arranged inside the inner gear ring, the first gears are arranged on one side of the output planetary carrier, which is close to the motor, and are arranged in a circumferential array, and the first gears are rotationally connected with the output planetary carrier and are meshed with the inner gear ring; an output shaft of the motor is connected with a second gear, and the second gear is arranged in the middle of the plurality of first gears and meshed with the plurality of first gears; and the output planet carrier is connected with an output piece penetrating through the second end seat.

More specifically, the second gear is made of a metal material, is sleeved on the output shaft of the motor, and is in interference fit with the output shaft of the motor.

More specifically, the second gear is made of a copper alloy material.

More specifically, a regulating planetary gear set is further arranged inside the inner gear ring; the regulation planetary gear set comprises a regulation planetary carrier and a plurality of third gears; the regulation and control planet carrier is arranged on one side of the output planetary gear set, which is close to the motor, a fourth gear is arranged on one side of the regulation and control planet carrier, which is close to the output planetary gear set, and the fourth gear is arranged in the middle of the first gears and is meshed with the first gears; the third gears are arranged on one side, close to the motor, of the regulation and control planet carrier and are distributed in a circumferential array mode, and the third gears are rotationally connected with the regulation and control planet carrier and meshed with the inner gear ring; the second gear is arranged in the middle of the third gears and meshed with the third gears.

More specifically, the regulation and control planetary gear set is provided with a plurality of groups, and the regulation and control planetary gear set is arranged along the axis direction of the inner ring gear, and two adjacent regulation and control planetary gear sets are in transmission connection.

More specifically, gaskets are arranged between the first end seat and the output planetary gear set and between the second end seat and the output planetary gear set.

More specifically, the outer side walls of the first end seat and the second end seat are respectively provided with a clamping block, two ends of the inner gear ring are respectively provided with a clamping hole corresponding to the clamping block, and the clamping block on the first end seat and the clamping block on the second end seat are correspondingly arranged in the clamping holes at two ends of the inner gear ring.

More specifically, first end seat with be equipped with a plurality of stoppers on the lateral wall of second end seat, interior ring gear both ends be equipped with respectively with the corresponding spacing groove of stopper, stopper on the first end seat with what stopper on the second end seat corresponded arranges in the spacing inslot at interior ring gear both ends.

More specifically, the outer casing overcoat is equipped with the outer box cover.

The utility model relates to a stable in structure's shutter gear box's technological effect does:

this application adopts self-tapping screw to run through the mounting hole on the shell to in the mounting groove on the reduction gear is packed into in the rotation of self-steering, produce screw thread and self-tapping screw connection in making the mounting groove. By adopting the design, the complexity of the injection mold is reduced, the research and development cost and the processing cost of the mold can be reduced, tapping is carried out by the tapping screw, so that the connection tightness of the shell and the speed reducer is better, the sliding teeth are not easy to occur, and the installation quality between the components is more ensured.

Drawings

FIG. 1 is a schematic view illustrating a connection between a motor and a gear in a conventional louver gear box;

fig. 2 is a schematic structural view of a structurally stable blind gear box according to the present invention;

FIG. 3 is a schematic cross-sectional view of a structurally stabilized blind gear box according to the present invention;

FIG. 4 is an exploded view of a structurally stabilized blind gear box according to the present invention;

fig. 5 is an exploded view of a speed reducer in a structurally stable louver gear box according to the present invention.

The labels in the figure are:

1, a motor; 2, a speed reducer; 3-a housing; 4, sheathing the outer box;

11-a second gear;

21-mounting groove; 22-inner gear ring; 221-clamping hole; 222-a limiting groove; 23-a first end seat; 231-a fixture block; 232-a limiting block; 24-a second end seat; 25-an output planetary gear set; 251 — output planet carrier; 252 — a first gear; 26-regulating the planetary gear set; 261-regulating the planet carrier; 262-third gear; 263 — fourth gear; 264-connecting shaft; 27-a gasket; 28-an output member; 281-an output rod; 282-plum blossom shaft coupling; 29-a bearing;

31-mounting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the embodiments of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In order to more clearly illustrate the technical solution of the present invention, a preferred embodiment is provided below. With particular reference to fig. 1-5. The utility model provides a shutter gear box that structure is firm, includes motor 1, reduction gear 2, shell 3 and self-tapping screw, wherein:

an accommodating cavity is formed in the shell 3, and the motor 1 and the speed reducer 2 are both arranged in the accommodating cavity; an installation groove 21 is formed in the speed reducer 2, an installation hole 31 is formed in the position, corresponding to the installation groove 21, of the shell 3, and the self-tapping screw penetrates through the installation hole 31 and then is locked in the installation groove 21; the motor 1 is connected with the speed reducer 2, and an output shaft of the motor is fixedly connected with an input end of the speed reducer 2; the shell 3 is provided with a connecting hole at a position corresponding to the output end of the speed reducer 2.

In this embodiment, a tapping screw is inserted into the mounting hole 31 of the housing 3, and is self-guided and rotated to be installed in the mounting groove 21 of the reduction gear 2, so that a thread is formed in the mounting groove 21 and connected to the tapping screw, and at this time, the thread in the mounting groove 21 and the tapping screw are in interference fit. By adopting the design, the complexity of the injection mold is reduced, the research and development cost and the processing cost of the mold can be reduced, tapping is carried out by tapping screws, so that the connection tightness of the shell 3 and the speed reducer 2 is better, the sliding teeth are not easy to occur, and the installation quality among all components is more ensured.

The utility model relates to a when the shutter gear box that the structure is firm used, the input through connection hole of outside book curtain ware and with reduction gear 2's output is connected, motor 1 provides power under reduction gear 2's the effect, export to driving and roll up curtain ware speed and obtain slowing down to this effective control is rolled up curtain ware and is driven the activity of venetian blind lift.

In this embodiment, the housing 3 includes a first shell and a second shell, and the first shell and the second shell are also connected by self-tapping screws.

As a preferable aspect of the present embodiment, the speed reducer 2 includes an inner ring gear 22, a first end mount 23, a second end mount 24, and an output planetary gear set 25; the first end seat 23 and the second end seat 24 are respectively installed at two ends of the inner gear ring 22, and the first end seat 23 is arranged at one end close to the motor 1; the first end seat 23 and the second end seat 24 are both provided with the mounting groove 21; the output planetary gear set 25 comprises an output planet carrier 251 and a plurality of first gears 252, the output planet carrier 251 is arranged inside the inner gear ring 22, the plurality of first gears 252 are arranged on one side of the output planet carrier 251 close to the motor 1 and are arranged in a circumferential array, and the first gears 252 are rotationally connected with the output planet carrier 251 and are meshed with the inner gear ring 22; an output shaft of the motor 1 is connected with a second gear 11, and the second gear 11 is arranged in the middle of the first gears 252 and meshed with the first gears 252; an output member 28 penetrating through the second end seat 24 is connected to the output carrier 251, and an input end of the roller shutter is fixedly connected with the output member 28. Since the first gear 252 is engaged with the second gear 11 and the inner ring gear 22, when the motor 1 drives the second gear 11 to rotate, the first gear 252 both rotates and revolves around the second gear 11, so as to drive the output planet carrier 251 to rotate, and the output planet carrier 251 and the second gear 11 have a differential speed, so as to achieve a speed reduction effect.

As a preferable scheme of this embodiment, a through hole is formed in the first end seat 23, a threaded hole is formed in the motor 1, and the motor 1 penetrates through the through hole through a bolt and then is in threaded connection with the threaded hole, so that the motor 1 is fixedly connected with the speed reducer 2.

As a preferable solution of this embodiment, the output member 28 includes an output rod 281 and a tulip coupling 282; the output rod 281 is mounted on the second end seat 24; the quincunx coupling 282 is mounted on the output lever 281. Specifically, roll up the curtain ware and follow the connecting hole stretches into, and with plum blossom shaft coupling 282 connects, plum blossom shaft coupling 282 will output rod 281's moment of torsion transmits to the roll curtain ware on, can also play the cushioning effect, it is used for absorbing vibration and the buffering load impact that causes when the shutter goes up and down, in order to reduce by a wide margin transmit to vibration on the reduction gear 2, and this plum blossom shaft coupling 282 can also absorb the installation deviation between compensation plum blossom shaft coupling 282 and the roll curtain ware through the deformation of the elastic component that its middle part set up, eliminate the inertia of operation radial force, so, can effectively this shutter gear box and shutter curtain resonance at the operation in-process, improve shutter curtain regulation's stability, the noise that produces when reducing the regulation, improve indoor silence nature.

As a preferable scheme of this embodiment, one end of the speed reducer 2 close to the quincunx coupling 282 is provided with a bearing 29, the bearing 29 is installed inside the second end seat 24, and the output rod 281 is connected with the bearing 29. The addition of the bearing 29 improves the rotation stability and the fluency of the output rod 281, thereby improving the stability of the shutter gear box for regulating and controlling the shutter.

As a preferable scheme of this embodiment, the second gear 11 is made of a metal material, and is sleeved on the output shaft of the motor 1 and is in interference fit with the output shaft of the motor 1. It should be noted that, referring to fig. 1, a connection mode of the gear 100 and the output shaft of the control motor 200 in the existing louver gear box is shown, the gear 100 used in the existing louver gear box is made of POM material, and when the control motor 200 works, the output shaft thereof is easy to generate a large amount of heat, in order to avoid that the gear 100 is heated and expanded to affect the transmission work, the output shaft of the motor 1 and the gear 100 are connected through the connecting sleeve 300, so that the contact area between the gear 100 and the output shaft of the control motor 200 is reduced, thereby improving the service life of the gear 100, but the connection in the above mode not only has high cost of manufacturing parts, but also has complicated installation steps, and affects the production efficiency. For solving above-mentioned problem, second gear 11 adopts metal material to make in this application, so, second gear 11 is difficult to be heated and produces deformation, but direct mount in on the output shaft of motor 1, and then need not to set up the adapter sleeve, not only reduced manufacturing cost, and simplified the installation step, the convenience of installation has been improved, and then improve production efficiency, secondly, the metal gear is by lathe turn-milling processing, precision is higher for injection moulding's gear, and then interference fit between steerable gear and motor 1's output shaft, be favorable to improving the eccentric problem of installation, simultaneously the uniformity is better, can effectively guarantee the installation accuracy, guarantee the stationarity when transmission operation, no-load and load noise are littleer during high rotational speed.

As a preferable solution of this embodiment, the second gear 11 is made of a copper alloy material. The gear made of the copper alloy is high in hardness, the service life of the gear made of the POM material is longer, the copper alloy has a self-lubricating effect, and therefore the second gear 11 can run more smoothly, and noise reduction is facilitated.

As a preferable scheme of the present embodiment, a regulating planetary gear set 26 is further provided inside the inner ring gear 22; the regulating planetary gear set 26 includes a regulating carrier 261 and a plurality of third gears 262; the regulation and control planet carrier 261 is arranged on one side of the output planetary gear set 25 close to the motor 1, a fourth gear 263 is arranged on one side of the regulation and control planet carrier 261 close to the output planetary gear set 25, and the fourth gear 263 is arranged in the middle of the first gears 252 and is meshed with the first gears 252; the plurality of third gears 262 are arranged on one side of the regulation and control planet carrier 261 close to the motor 1 and are arranged in a circumferential array, and the third gears 262 are rotatably connected with the regulation and control planet carrier 261 and are meshed with the inner gear ring 22; the second gear 11 is disposed in the middle of the third gears 262 and is engaged with the third gears 262. In the adjusting planetary gear set 26, the third gear 262, the second gear 11 and the inner ring gear 22 cooperate to drive the adjusting planetary carrier 261 to rotate, and a differential speed exists between the adjusting planetary carrier 261 and the second gear 11, and the fourth gear 263 on the adjusting planetary carrier 261 and the third gear 262 cooperate to drive the output planetary carrier 251 to rotate, and the rotation speed of the output planetary carrier 251 is lower than that of the adjusting planetary carrier 261, that is, the design of the adjusting planetary gear set 26 is adopted to further reduce the rotation speed of the output planetary carrier 251.

As a preferable solution of this embodiment, a plurality of connecting shafts 264 for installing the third gears 262 are disposed on one side of the adjusting and controlling planet carrier 261 close to the motor 1, and the number of the connecting shafts 264 is greater than that of the third gears 262. It should be noted that friction exists between the third gear 262 and the connecting shaft 264 during the rotation process, and under long-term operation, the connecting shaft 264 is easily worn to be unable to adapt to the third gear 262, and even breaks, so that the regulation and control planet carrier 261 needs to be replaced, and the maintenance cost is high. In order to solve the above problem, the number of the connecting shafts 264 is increased in the present application, so that the connecting shafts 264 not connected to the third gear 262 form a spare shaft, and when the connecting shafts 264 originally connected to the third gear 262 are damaged, the third gear 262 can be connected to the spare shaft through the spare shaft, so that the regulating and controlling planet carrier 261 can still be continuously used, thereby reducing the maintenance cost. Specifically, in this embodiment, six connecting shafts 264 are arranged on the regulating planet carrier 261 in a circumferential array, and three third gears 262 are arranged on the three connecting shafts 264, and the three third gears 262 are arranged in a circumferential array and correspondingly mounted on the connecting shafts 264, so that after any one connecting shaft 264 originally connected with the third gears 262 is damaged, the three third gears 262 can be adjusted to the other three connecting shafts 264, so that the regulating planetary gear set 26 can normally work.

As a preferable solution of the present embodiment, the regulating planetary gear set 26 has a plurality of sets, the plurality of sets of regulating planetary gear sets 26 are arranged along the axial direction of the inner ring gear 22, and two adjacent regulating planetary gear sets 26 are in transmission connection. The rotating speed of the output planet carrier 251 can be controlled by arranging different numbers of regulating and controlling planetary gear sets 26, and then the lifting control requirements of different shutters are met.

Preferably, gaskets 27 are disposed between the first end seat 23 and the output planetary gear set 25 and between the second end seat 24 and the output planetary gear set 25. The gasket 27 is designed to prevent the gear from directly contacting the first end seat 23 or the second end seat 24 to cause the abrasion of the end seats, so as to prolong the service life of the first end seat 23 and the second end seat 24 and reduce the maintenance and replacement costs.

As a preferable scheme of this embodiment, the outer sidewalls of the first end seat 23 and the second end seat 24 are respectively provided with a latch 231, two ends of the internal gear ring 22 are respectively provided with a latch hole 221 corresponding to the latch 231, and the latch 231 on the first end seat 23 and the latch 231 on the second end seat 24 are correspondingly disposed in the latch holes 221 at two ends of the internal gear ring 22. The first end seat 23 and the second end seat 24 are fixedly connected to the inner gear ring 22 by the engagement of the latch 231 and the latch hole 221. Preferably, the plurality of fastening holes 221 are arranged, the plurality of fastening holes 221 are circumferentially arranged on the inner gear ring 22 in an array, and the plurality of fastening blocks 231 on the first end seat 23 and the second end seat 24 are correspondingly arranged.

As a preferred scheme of this embodiment, a plurality of limiting blocks 232 are disposed on the outer sidewalls of the first end seat 23 and the second end seat 24, limiting grooves 222 corresponding to the limiting blocks 232 are respectively disposed at two ends of the inner gear ring 22, and the limiting blocks 232 on the first end seat 23 and the limiting blocks 232 on the second end seat 24 are correspondingly disposed in the limiting grooves 222 at two ends of the inner gear ring 22. The position between the first end seat 23 and the inner ring gear 22 and the position between the second end seat 24 and the inner ring gear 22 are limited by the cooperation of the limiting block 232 and the limiting groove 222, so as to prevent the speed reducer 2 from being unstable due to relative rotation between the first end seat 23 or the second end seat 24 and the inner ring gear 22, i.e. avoid influencing the lifting control of the window blind.

As a preferable scheme of this embodiment, an outer box sleeve 4 is sleeved outside the outer shell 3, and the outer box sleeve 4 is made of a silicone material. Adopt outer box cover 4 made by silica gel material not only can play the guard action and reduce motor 1 noise per se and pass to indoorly, can also completely cut off the produced vibration transmission of motor 1 and window. Preferably, the outer box sleeve 4 is made of heat-conducting silica gel, so that the heat dissipation performance of the motor 1 can be improved.

The utility model relates to a stable in structure's shutter gear box through reasonable structure setting, has solved current shutter gear box and has adopted screw and injection moulding's thread groove cooperation not only to appear smooth tooth easily with the mode that shell and gear box are connected, and the assembly precision is poor, and the screw easily receives the vibration of gear box and produces self activity, leads to each part on the shutter gear box to connect unstable problem.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the structure thereof is not limited to the shapes illustrated above, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a shutter gear box that structure is firm which characterized in that: including motor, reduction gear, shell and self-tapping screw, wherein:

an accommodating cavity is formed in the shell, and the motor and the speed reducer are both arranged in the accommodating cavity; the speed reducer is provided with an installation groove, the shell is provided with an installation hole at a position corresponding to the installation groove, and the self-tapping screw penetrates through the installation hole and then is locked in the installation groove; the motor is connected with the speed reducer, and an output shaft of the motor is fixedly connected with an input end of the speed reducer; and the shell is provided with a connecting hole at a position corresponding to the output end of the speed reducer.

2. A structurally sound shutter gear box in accordance with claim 1, further comprising: the speed reducer comprises an inner gear ring, a first end seat, a second end seat and an output planetary gear set; the first end seat and the second end seat are respectively arranged at two ends of the inner gear ring, and the first end seat is arranged at one end close to the motor; the first end seat and the second end seat are both provided with the mounting grooves; the output planetary gear set comprises an output planetary carrier and a plurality of first gears, the output planetary carrier is arranged inside the inner gear ring, the first gears are arranged on one side, close to the motor, of the output planetary carrier and are arranged in a circumferential array mode, and the first gears are rotationally connected with the output planetary carrier and meshed with the inner gear ring; the output shaft of the motor is connected with a second gear, and the second gear is arranged in the middle of the first gears and meshed with the first gears; and the output planet carrier is connected with an output piece penetrating through the second end seat.

3. A structurally sound blind gear box as claimed in claim 2, wherein: the second gear is made of metal materials, is sleeved on the output shaft of the motor and is in interference fit with the output shaft of the motor.

4. A structurally sound blind gear box as claimed in claim 3, wherein: the second gear is made of copper alloy materials.

5. A structurally sound shutter gear box in accordance with claim 2 wherein: a regulating planetary gear set is also arranged inside the inner gear ring; the regulation planetary gear set comprises a regulation planetary carrier and a plurality of third gears; the regulation and control planet carrier is arranged on one side of the output planetary gear set close to the motor, a fourth gear is arranged on one side of the regulation and control planet carrier close to the output planetary gear set, and the fourth gear is arranged in the middle of the first gears and meshed with the first gears; the third gears are arranged on one side, close to the motor, of the regulation and control planet carrier and are distributed in a circumferential array mode, and the third gears are rotationally connected with the regulation and control planet carrier and meshed with the inner gear ring; the second gears are arranged in the middle of the third gears and are meshed with the third gears.

6. A structurally sound shutter gear box according to claim 5, wherein: the regulating planetary gear set is provided with a plurality of groups, the plurality of groups are distributed along the axial direction of the inner gear ring, and two adjacent regulating planetary gear sets are in transmission connection.

7. A structurally sound blind gear box as claimed in claim 2, wherein: gaskets are arranged between the first end seat and the output planetary gear set and between the second end seat and the output planetary gear set.

8. A structurally sound shutter gear box in accordance with claim 2 wherein: the outer side walls of the first end seat and the second end seat are respectively provided with a clamping block, two ends of the inner gear ring are respectively provided with a clamping hole corresponding to the clamping block, and the clamping block on the first end seat and the clamping block on the second end seat are correspondingly arranged in the clamping holes at two ends of the inner gear ring.

9. A structurally sound blind gear box as claimed in claim 2, wherein: the first end seat with be equipped with a plurality of stoppers on the lateral wall of second end seat, interior ring gear both ends be equipped with respectively with the corresponding spacing groove of stopper, stopper on the first end seat with what stopper on the second end seat corresponded arranges in the spacing inslot at interior ring gear both ends.

10. A structurally sound blind gear box as set forth in claim 1, wherein: an outer box sleeve is sleeved outside the outer shell.

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