CN219082183U

CN219082183U - Gear box and electric scissors

Info

Publication number: CN219082183U
Application number: CN202320188840.XU
Authority: CN
Inventors: 姚妙杰
Original assignee: Yongkang Suoxin Technology Co ltd
Current assignee: Yongkang Suoxin Technology Co ltd
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-05-26
Anticipated expiration: 2033-02-13

Abstract

The utility model discloses a gear box and electric scissors, which comprise a shell, a first-stage gear set and a second-stage gear set, wherein the first-stage gear set comprises a first-stage planet carrier, the first-stage planet carrier is distributed with a first-stage planetary gear set formed by a plurality of first gears, a sun gear is arranged in the middle of the first-stage planetary gear set, the sun gear is in meshed transmission connection with the first gears respectively, the second-stage gear set comprises a sun gear, the sun gear is in meshed transmission connection with a second-stage planetary gear set formed by a plurality of second gears, the second-stage planetary gear set is fixed on the second planet carrier, and the reduction ratio of the first-stage planetary gear set to the second-stage planetary gear set is 29:1. The utility model has reasonable design, can save electricity, improves the endurance time, is beneficial to slowing down the heating speed, is beneficial to delaying the service life, and can meet the use requirement.

Description

Gear box and electric scissors

Technical Field

The utility model relates to the technical field of transmission in electric scissors, in particular to a gear box and electric scissors.

Background

Gearboxes are currently an important mechanical component in a wide range of applications for gearboxes, such as in electric shears. The main function of the motor is to obtain corresponding rotating speed through a gear box, for example, in Chinese patent application publication No. CN210013982U, a gear box and a gear reduction motor are disclosed, the gear box comprises a shell, a first-stage planetary gear, a second-stage planetary gear and an output gear, the first-stage planetary gear and the second-stage planetary gear are arranged in the shell, the output gear is arranged on the second-stage planetary gear, the first-stage planetary gear drives the second-stage planetary gear to rotate, and the second-stage planetary gear drives the output gear to rotate. The number of teeth of the first sun gear is 13, the number of teeth of the planet gears is 11, the number of teeth of the first inner gear ring is 36, and the transmission ratio of the first-stage planet gears is 3.769. The number of teeth of the second sun gear is 9, the number of teeth of the duplex planetary gear is 13, the number of teeth of the second annular gear is 39, the transmission ratio of the second-stage planetary gear is 65, and the total transmission ratio of the two-stage planetary gear is 245. It can be seen that the reduction ratio for the gearbox in the electric shears is 245:1, however there is also a reduction ratio of 78:1;95:1;115:1, etc., and for a reduction gearbox with a reduction ratio of 18:1 used in electric scissors, the reduction gearbox generally needs current generated by a 75A-80A motor to generate required torque force, so that the problems of high power consumption and short endurance time can occur in the use process, and the 75A-80A current can cause rapid heating, so that the service life of equipment is shortened, the use requirement cannot be met, and improvement is needed.

Disclosure of Invention

First, the technical problems to be solved

Aiming at the defects in the prior art, the utility model provides the gearbox and the electric scissors, which are reasonable in design, so that the gearbox and the electric scissors can save electricity, improve the endurance time, reduce the heating speed, delay the service life and meet the use requirement.

(II) technical problem to be solved

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a gear box, includes the casing and be provided with first order gear train and second grade gear group in the casing, first order gear train transmission is connected with second grade gear group, first order gear train is including setting up the inside rotatable first order planet carrier of casing, it has the first order planetary gear train of constituteing by a plurality of first gear to distribute on the first order planet carrier, the sun gear has been arranged in the middle of the first order planetary gear train, the sun gear with first gear is the meshing transmission respectively and is connected, second grade gear group is including setting up sun gear on the first order planet carrier, sun gear meshing transmission is connected with the second grade planetary gear set of constituteing by a plurality of second gear, the second grade planetary gear set is fixed on the second planet carrier, the reduction ratio of first order gear train and second grade gear group is 29:1.

As a further embodiment: the inner side wall of the shell is provided with an inner gear which is meshed with a first gear in the first-stage planetary gear set and a second gear in the second-stage planetary gear set respectively.

As a further embodiment: the shell comprises a shell with a hollow structure, the inner part of the shell is divided into an upper part, a middle part and a lower part, the middle part is provided with an inner bulge integrated with the shell, and the inner bulge is provided with the inner gear.

As a further embodiment: the upper casing is provided with a plurality of locking holes, and locking pieces are arranged in the locking holes.

As a further embodiment: the locking piece adopts a bolt or a bolt.

As a further embodiment: the locking holes are uniformly distributed on the shell at intervals.

As a further embodiment: the planetary gear set further comprises an upper gasket arranged on the end face of the first-stage gear set, and a lower gasket is arranged between the second-stage gear set and the first-stage planetary carrier.

As a further embodiment: the number of the first gears and the number of the second gears are three.

As a further embodiment: the reduction ratio of the first stage gear set to the second stage gear set is 29:1, specifically: the number of teeth of the internal gear is 46, the number of teeth of the sun gear is 14, the number of teeth of the first gear in the first-stage gear set is 15, the number of teeth of the sun gear is 8, and the number of teeth of the second gear in the second-stage gear set is 18.

The utility model further provides electric scissors comprising the gear box.

(III) technical effects to be achieved

Compared with the prior art, the utility model has the beneficial effects that:

firstly, the reduction ratio of the first-stage gear set to the second-stage gear set is 29:1, and the gearbox with the structure can achieve required torsion by using smaller current and even exceed the required torsion.

The reduction ratio of the first-stage gear set to the second-stage gear set is 29:1, so that the motor can be used with a motor with smaller current, the heating speed is reduced, and the service life of the device is prolonged.

Third, the reduction ratio of the first stage gear set and the second stage gear set of the utility model is 29:1, specifically: the number of teeth of the internal gear is 46, the number of teeth of the sun gear is 14, the number of teeth of the first gear in the first-stage gear set is 15, the number of teeth of the sun gear is 8, and the number of teeth of the second gear in the second-stage gear set is 18.

Thirdly, the utility model also provides electric scissors, which comprise the gear box, wherein the gear box is reasonable in design, the electric scissors are used with motors with smaller currents (such as 55A-60A), power saving is facilitated, endurance time is prolonged, large torsion is generated by the smaller currents, use requirements can be met, heating speed is reduced, and service life is prolonged.

Drawings

FIG. 1 is an exploded view of a gear box according to the present utility model.

Fig. 2 is a schematic perspective view of a gear box according to the present utility model.

Fig. 3 is a schematic diagram of a front view of a gearbox according to the present utility model.

Fig. 4 is a schematic view of fig. 3 taken along A-A.

FIG. 5 is a schematic diagram of the distribution of a first stage gear set and a second stage gear set in a gearbox according to the present utility model.

Fig. 6 is a schematic view of a housing structure in a gear box according to the present utility model.

Fig. 7 is a schematic perspective view of an electric scissors according to the present utility model.

Fig. 8 is a schematic view showing an internal structure of an electric scissors according to the present utility model.

Fig. 9 is a schematic side view of an electric shears according to the present utility model.

Fig. 10 is a schematic cross-sectional view taken along the B-B direction in fig. 9.

In the figure: 1, a shell; 2, a first stage gear set; 3, a second stage gear set; 4, upper gasket; 5, lower gasket; 11, an internal gear; 12, a housing; 13, upper part; 14, middle part; 15, lower part; 16, locking holes; 21, a first stage planet carrier; 22, a first stage planetary gear set; 23, sun gear; 31, a sun gear; 32, a second stage planetary gear set; 33, a second planet carrier.

10, a gear box; 20, a main body; 30, scissors; 40, driving source.

Detailed Description

In the description of the present utility model, it will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships in which the inventive product is conventionally placed in use, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

Embodiment one: referring to fig. 1, fig. 4 and fig. 5, a gear box comprises a housing 1, a first-stage gear set 2 and a second-stage gear set 3 are arranged in the housing 1, the first-stage gear set 2 is in transmission connection with the second-stage gear set 3, the first-stage gear set 2 comprises a first-stage planet carrier 21 which is arranged in the housing 1 and can rotate, a first-stage planetary gear set 22 formed by a plurality of first gears is distributed on the first-stage planet carrier 21, a sun gear 23 is arranged in the middle of the first-stage planetary gear set 22, the sun gear 23 is in meshed transmission connection with the first gears respectively, the second-stage gear set 3 comprises a sun gear 31 arranged on the first-stage planet carrier 21, the sun gear 31 is in meshed transmission connection with a second-stage planetary gear set 32 formed by a plurality of second gears, the second-stage planetary gear set 32 is fixed on the second-stage planet carrier 33, and the reduction ratio of the first-stage gear set 2 to the second-stage gear set 3 is 29:1.

Embodiment two: as shown in fig. 1, 4 and 5, on the basis of the first embodiment, the inner side wall of the casing 1 is provided with an inner gear 11, and the inner gear 11 is meshed with a first gear in the first-stage planetary gear set 22 and a second gear in the second-stage planetary gear set 32 respectively, which is beneficial to realizing that the first gear in the first-stage planetary gear set 22 and the second gear in the second-stage planetary gear set 32 rotate in the interior of the casing 1. As shown in fig. 2, 4 and 6, it is to be noted that the housing 1 includes a casing 12 with a hollow structure, the interior of the casing 12 is divided into an upper portion 13, a middle portion 14 and a lower portion 15, the middle portion 14 is provided with an inner protrusion integrated with the casing 12, the inner protrusion is provided with an inner gear 11, and the lower portion 15 is provided with an inner thread (which is convenient to be connected or installed with an external device), so that the design is reasonable, the structure is simple, and the production and the manufacturing are convenient. As shown in fig. 2, 3, 4 and 6, it is further intended that the casing 12 of the upper portion 13 is provided with a plurality of locking holes 16, locking members are installed in the locking holes 16, wherein the locking members are bolts or bolts, which are convenient to implement and operate, the plurality of locking holes 16 are uniformly distributed on the casing 12 at intervals, and finally it is also intended that the upper washer 4 is arranged on the end face of the first-stage gear set 2, which is favorable for connection stability with external equipment and avoids damage to the first-stage gear set 2.

Embodiment III: as shown in fig. 1, 4 and 5, based on the second embodiment, the number of the first gears and the second gears is three, which is more beneficial to realizing the reduction ratio of 29:1 of the first-stage gear set 2 and the second-stage gear set 3.

Embodiment four: as shown in fig. 1, 4 and 5, further explanation can be made on the basis of the second or third embodiment, wherein the reduction ratio of the first-stage gear set 2 to the second-stage gear set 3 is 29:1, specifically: the number of teeth (Z) of the internal gear 11 is 46, the number of teeth (Z) of the sun gear 23 is 14, the number of teeth (Z) of the first gear in the first-stage gear set 2 is 15, the number of teeth (Z) of the sun gear 31 is 8, the number of teeth (Z) of the second gear in the second-stage gear set 3 is 18, the modulus (m) is 0.5, the first-stage reduction ratio is (46/14) +1= 4.285, the second-stage reduction ratio is (46/8) +1=6.75, the overall reduction ratio of the first-stage gear set 2 and the second-stage gear set 3 is 4.285×6.75=28.93, and the total transmission ratio of the two-stage planetary gears is 29, thereby satisfying the reduction ratio of the first-stage gear set 2 and the second-stage gear set 3 being 29:1. For example, in the market, the reduction ratio is 18:1, the reduction gearbox is connected with a traditional motor, the current generated by the traditional motor is 75A-80A, the adopted rotating speed is as high as 2 ten thousand/min, then the required torque can be generated through 18:1 on the traditional reduction gearbox, the motor with smaller current (55A-60A) is used for generating the required torque through the reduction ratio of 29:1 of the first-stage gear set 2 and the second-stage gear set 3, even the required torque is exceeded, the effect of generating large torque with smaller current is achieved, the use requirement can be met, and only the motor with smaller current (55A-60A) is needed, so that the electric energy is saved, the duration time is prolonged by more than 30%, the heating speed generated by the motor with smaller current (55A-60A) is also facilitated to be reduced, the service life of the device is prolonged, and the use requirement can be met.

Fifth embodiment: as shown in fig. 7, 8, 9 and 10, an electric scissors including the gear case 10 as described above can be explained on the basis of the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment. It is further intended that the electric scissors comprise a main body 20, wherein the scissors 30 are arranged at the head of the main body 20, the gear box 10 and the driving source 40 are arranged in the main body 20, and the gear box 10 is connected with the driving source 40, so that the same rotating speed can be obtained by using smaller current on the electric scissors, the loss of the current is reduced, the investment of the cost is reduced, the quick heating of the scissors is also facilitated to be reduced, the service life of the product is prolonged, and the use requirement can be met. The driving source 40 is provided with the output shaft, the output shaft is arranged in the sun gear 23, the shell 1 is fixedly connected with the driving source 40 by the locking piece, the driving source 40 is a motor in the implementation, the installation and the production are convenient, the upper washer 4 is arranged between the driving source and the first-stage gear set 2, the connection stability is improved, the driving source 40 is prevented from damaging the first-stage gear set 2, the lower washer 5 is arranged between the second-stage gear set 3 and the first-stage planet carrier 21, the abrasion to the first-stage gear set 2 is reduced, and the service life of equipment is prolonged.

According to the utility model, the driving source 40 is driven by the gear box 10, the second planet carrier 33 in the gear box 10 can drive the scissors 30, larger torque can be achieved by using the same current, and the heating condition of the scissors 30 is reduced, the motor with smaller current (55A-60A) is used for generating required torque through the reduction ratio of 29:1 of the first-stage gear set 2 and the second-stage gear set 3 in the embodiment, even the required torque is exceeded, the effect of generating large torque by the smaller current is achieved, the use requirement can be met, and only the motor with smaller current (55A-60A) is needed, so that the electric energy is saved, the heating speed generated by the motor with smaller current (55A-60A) is improved by more than 30%, the service life of the device is prolonged, and the use requirement can be met.

Standard parts used in the application file can be purchased from the market, the specific connection mode of each part adopts conventional means such as mature bolts and screws in the prior art, the internal parts of the motor adopt conventional models in the prior art, the internal structure of the motor belongs to the prior art structure, a worker can complete normal operation of the motor according to the prior art manual, and the circuit connection adopts the conventional connection mode in the prior art, so that specific description is not made.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present utility model is not limited thereby. Therefore, based on the innovative concepts of the present utility model, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solutions directly or indirectly to other relevant technical fields, all of which are included in the scope of protection of the present patent.

Claims

1. The utility model provides a gear box, includes casing (1) and be provided with first stage gear train (2) and second stage gear group (3) in casing (1), first stage gear train (2) transmission is connected with second stage gear group (3), its characterized in that: the first-stage planetary gear set (2) comprises a first-stage planetary gear set (21) which is arranged in the shell (1) and can rotate, first-stage planetary gear sets (22) which are formed by a plurality of first gears are distributed on the first-stage planetary gear set (21), sun gears (23) are arranged in the middle of the first-stage planetary gear sets (22), the sun gears (23) are respectively in meshed transmission connection with the first gears, the second-stage planetary gear set (3) comprises a sun gear (31) which is arranged on the first-stage planetary gear set (21), the sun gear (31) is in meshed transmission connection with a second-stage planetary gear set (32) which is formed by a plurality of second gears, and the second-stage planetary gear sets (32) are fixed on the second planetary gear set (33), wherein the reduction ratio of the first-stage planetary gear set (2) to the second-stage planetary gear set (3) is 29:1.

2. A gearbox as claimed in claim 1, wherein: an inner gear (11) is arranged on the inner side wall of the shell (1), and the inner gear (11) is meshed with a first gear in the first-stage planetary gear set (22) and a second gear in the second-stage planetary gear set (32) respectively.

3. A gearbox according to claim 2 wherein: the shell (1) comprises a shell (12) with a hollow structure, the inner part of the shell (12) is divided into an upper part (13), a middle part (14) and a lower part (15), the middle part (14) is provided with an inner bulge which is integrated with the shell (12), and the inner bulge is provided with the inner gear (11).

4. A gearbox according to claim 3 wherein: a plurality of locking holes (16) are formed in the machine shell (12) of the upper portion (13), and locking pieces are arranged in the locking holes (16).

5. A gear box according to claim 4, wherein: the locking piece adopts a bolt or a bolt.

6. A gear box according to claim 4, wherein: the locking holes (16) are uniformly distributed on the casing (12) at intervals.

7. A gearbox according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein: the planetary gear set further comprises an upper gasket (4) arranged on the end face of the first-stage gear set (2), and a lower gasket (5) is arranged between the second-stage gear set (3) and the first-stage planet carrier (21).

8. A gear box according to claim 7, wherein: the number of the first gears and the number of the second gears are three.

9. A gearbox according to claim 2 or 3 or 4 or 5 or 6 wherein: the reduction ratio of the first-stage gear set (2) to the second-stage gear set (3) is 29:1, specifically: the number of teeth of the internal gear (11) is 46, the number of teeth of the sun gear (23) is 14, the number of teeth of the first gear in the first-stage gear set (2) is 15, the number of teeth of the sun gear (31) is 8, and the number of teeth of the second gear in the second-stage gear set (3) is 18.

10. An electric scissors, characterized in that: gearbox (10) comprising a gearbox according to any of the claims 1-9.