CN211901470U

CN211901470U - Clutch structure capable of automatically adjusting center distance and speed reducer

Info

Publication number: CN211901470U
Application number: CN201922078146.9U
Authority: CN
Inventors: 陈思祖
Original assignee: Shenzhen Hobere Technology Co ltd
Current assignee: Shenzhen Hobere Technology Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-11-10
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a clutch structure and a speed reducer capable of automatically adjusting center distance, wherein the clutch structure comprises an elastic sheet, a planetary gear and a driving gear; the elastic sheet is arranged on the driving gear, and the elastic sheet has an elastic end and a clamping end; the planetary gear is arranged at the clamping end, and the elastic sheet provides elasticity to keep the planetary gear meshed with the driving gear. The elastic sheet provides elasticity, so that when the planetary gear and the driving gear are abraded, the elastic sheet can be utilized to automatically adjust the center distance between the planetary gear and the driving gear; the friction coefficient between the planetary gear and the driving gear is not reduced due to abrasion, so that the planetary gear is always meshed with the driving gear and keeps proper friction; compared with the traditional swing block swing type clutch structure, the clutch structure has the advantages that the clutch stability can be further improved, and the service life of the clutch structure can be prolonged.

Description

Clutch structure capable of automatically adjusting center distance and speed reducer

Technical Field

The utility model belongs to the technical field of separation and reunion structure and technology and specifically relates to indicate an automatic adjust centre-to-centre spacing's separation and reunion structure and reduction gear.

Background

Among the existing various clutch structures, the clutch structure adopting the swing type swinging type clutch is a clutch structure which is simpler and more reliable in realizing clutch. For example, the chinese utility model patent CN 106703532 a discloses a transmission structure of an electronic lock cylinder and a clutch mode of an electronic lock using the structure, the specific structure is that, when a main transmission gear rotates, a driven gear and a swing block are in a free state, and the swing block rotates along with the main transmission gear; the output gear is arranged on the mounting shell, and the swinging block can drive the driven gear to be meshed with the output gear when rotating.

Generally, the effect of rotating the swing block together with the driving gear is achieved by the friction generated by the connection between the swing block, the driven gear and the driving gear, and the swing block is swung by the generated friction force. However, after the clutch structure is used for a long time, abrasion caused by mutual friction between the driven gear and the driving gear and between the driven gear and the swinging block is inevitable; the friction coefficient of the clutch structure is reduced due to the abrasion, so that proper friction force cannot be kept between the driven gear and the driving gear; resulting in unstable clutch performance and limited service life of the clutch structure.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses to the disappearance that prior art exists, its main objective provides an automatically regulated centre-to-centre spacing's separation and reunion structure and reduction gear, and its structure sets up rationally, has solved effectively in the past separation and reunion structure because wearing and tearing have appeared, makes the problem that separation and reunion performance is unstable, life is not high.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a clutch structure capable of automatically adjusting center distance comprises an elastic plate, a planetary gear and a driving gear; the elastic sheet is arranged on the driving gear, and the elastic sheet has an elastic end and a clamping end; the planetary gear is arranged at the clamping end, and the elastic sheet provides elasticity to keep the planetary gear meshed with the driving gear.

As a preferred embodiment: the elastic sheet is provided with two clamping ends which are respectively integrally formed on two sides of the elastic end and are arranged in a U shape or a V shape.

As a preferred embodiment: the elastic sheet comprises an upper elastic sheet and a lower elastic sheet, and the planetary gear is positioned between the upper elastic sheet and the lower elastic sheet.

As a preferred embodiment: the clamping ends of the upper elastic sheet and the lower elastic sheet are connected with a first installation shaft, and the planetary gear is rotatably installed on the first installation shaft.

As a preferred embodiment: the driving gear comprises an upper gear and a lower gear arranged at the lower end of the upper gear, and the upper gear is rotatably arranged on a second mounting shaft;

the upper elastic sheet is positioned at the upper end of the upper gear and limited by a second mounting shaft;

the lower elastic sheet is positioned at the upper end of the lower gear and limited by the upper gear;

the planet gear is meshed with the upper gear.

As a preferred embodiment: and a limited concave position is arranged on one side, opposite to the clamping end, of the upper elastic sheet, and the upper elastic sheet is limited by the second mounting shaft through the limited concave position.

A speed reducer comprises a clutch structure, a motor and an output part; the motor is connected with the driving gear through at least one group of reduction gear groups, and when the driving gear drives the planetary gear, the elastic sheet rotates along with the driving gear; when the elastic piece swings, the planetary gear can be selectively meshed with the output piece.

As a preferred embodiment: the speed reducing gear set, the clutch structure and the output part are arranged in the shell; the motor is arranged on the outer side of the casing, and the output end of the motor extends into the casing and is connected with the speed reduction gear set.

As a preferred embodiment: the elastic sheet is provided with a torsion spring which comprises a spiral body and two torsion arms; the elastic piece is provided with a first limiting part, the upper surface inside the shell is provided with a second limiting part, and the torsion arm is limited by the first limiting part and the second limiting part;

when the elastic sheet rotates and swings towards the positive direction, one torsion arm moves along the positive direction along with the elastic sheet, and the other torsion arm is limited by the second limiting part;

when the elastic piece rotates and swings reversely, the other torsion arm moves along the reverse direction along with the elastic piece, and one torsion arm is limited by the second limiting part.

As a preferred embodiment: the upper surface of the interior of the shell is also provided with a limiting groove, and the first limiting part can be selectively limited in the limiting groove.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme: the planet gear is arranged at the clamping end of the elastic sheet through the arranged elastic sheet; the elastic sheet provides elasticity, so that when the planetary gear and the driving gear are abraded, the elastic sheet can be utilized to automatically adjust the center distance between the planetary gear and the driving gear; the friction coefficient between the planetary gear and the driving gear is not reduced due to abrasion, so that the planetary gear is always meshed with the driving gear and keeps proper friction; compared with the traditional swing block swing type clutch structure, the clutch structure has the advantages that the clutch stability can be further improved, and the service life of the clutch structure can be prolonged.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic perspective view of a clutch structure according to a preferred embodiment of the present invention.

Fig. 2 is a schematic perspective view of another angle of the clutch structure according to the preferred embodiment of the present invention.

Fig. 3 is an exploded view of the clutch structure according to the preferred embodiment of the present invention.

Fig. 4 is a top view of the clutch structure according to the preferred embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a reducer according to a preferred embodiment of the present invention.

Fig. 6 is a schematic structural diagram of the reducer opening case according to the preferred embodiment of the present invention.

FIG. 7 is a cross-sectional view taken at A-A of the retarder of FIG. 5.

Fig. 8 is a top view showing the internal structure of the decelerator according to the preferred embodiment of the present invention.

Fig. 9 is a state diagram of the clutch structure of the preferred embodiment of the present invention in forward swing.

Fig. 10 is a diagram illustrating a state of reverse deflection of the clutch structure according to the preferred embodiment of the present invention.

The attached drawings indicate the following:

10. clutch structure 11 and elastic piece

1101. Upper spring plate 1102 and lower spring plate

111. Elastic end 112, clamping end

1121. Restricted recess 1122, mounting hole

113. First mounting shaft 1131, mounting post

114. Torsion spring 1141 and spiral body

1142. Torsion arm 115, first limiting part

12. Planetary gear 13, drive gear

131. Upper gear 132, lower gear

133. Second installation axle 20, motor

30. Output member 31, first tooth piece

32. Second tooth plate 40, reduction tooth group

50. Case 51, second limiting part

52. And a limiting groove.

Detailed Description

Referring to fig. 1 to 10, a specific structure of a preferred embodiment of the present invention is shown, which is a clutch structure and a speed reducer capable of automatically adjusting a center distance, and includes a clutch structure 10 and a speed reducer.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The clutch structure 10 (shown in fig. 1 to 4) includes an elastic plate 11, a planetary gear 12 and a driving gear 13, in the embodiment of the present application, the elastic plate 11 is disposed on the driving gear 13, and the elastic plate 11 has an elastic end 111 and a clamping end 112; the planetary gear 12 is provided at the holding end 112, and the elastic piece 11 provides an elastic force to keep the planetary gear 12 engaged with the driving gear 13. When the clutch structure 10 is used for a long time, if a gap is generated between the planet gear 12 and the driving gear 13 due to abrasion, the planet gear 12 can be elastically clamped to the driving gear 13 through the clamping end 112 of the elastic sheet 11 (as shown in fig. 4); the center distance between the center of the planetary gear 12 and the center of the driving gear 13 can be automatically adjusted, the planetary gear 12 is always effectively meshed with the driving gear 13, and the elastic piece 11 can swing by keeping proper friction force, so that the clutch stability is improved; the friction coefficient between the planetary gear 12 and the driving gear 13 is not reduced due to long-term abrasion, so that clutch failure is avoided, and the service life of the clutch structure 10 can be prolonged. Generally, such a clearance, except for that occurring between the planetary gear 12 and the drive gear 13 due to wear; wear due to rotation of the planet gears 12 themselves or wear due to multiple oscillations of the elastic piece 11 may also occur and play may occur; similarly, the gaps can be solved by automatically adjusting the center distance between the planet gear center and the driving gear 13 center through the elastic clamping force of the elastic piece 11.

Specifically, the elastic sheet 11 has two clamping ends 112 integrally formed on two sides of the elastic end 111 to form a U-shaped or V-shaped configuration; therefore, the number of the planetary gears 12 is two, which are mounted on the two holding ends 112. In addition, the elastic sheet 11 comprises an upper elastic sheet 1101 and a lower elastic sheet 1102, and the planetary gear 12 is located between the upper elastic sheet 1101 and the lower elastic sheet 1102; in this manner, the manner of providing the bielastic piece 11 is utilized; on one hand, the swing of the elastic piece 11 can be ensured to be more reliable, and on the other hand, the clamping force on the planetary gear 12 can be kept in a balanced state; the reliability and stability of the entire clutch structure 10 are improved.

In more detail, the clamping ends 112 of the upper and

lower shrapnels

1101 and 1102 are connected with the first mounting shaft 113, and the planetary gear 12 is rotatably mounted on the first mounting shaft 113. A small mounting column 1131 is arranged at each of the upper end and the lower end of the first mounting shaft 113, a step is formed between the mounting column 1131 and the first mounting shaft 113, and a mounting hole 1122 is arranged at the clamping end 112 of the upper shrapnel 1101 and the lower shrapnel 1102; during assembly, the lower mounting post 1131 of the first mounting shaft 113 is inserted into the mounting hole 1122 of the lower resilient tab 1102, and the upper surface of the lower resilient tab 1102 abuts against the step; then, the planet gear 12 is rotatably mounted in the first mounting shaft 113, and finally, the upper mounting post 113 of the first mounting shaft 113 is inserted into the mounting hole 1122 of the upper dome 1101, and the lower surface of the upper dome 1101 is pressed against the step. Utilize the step to carry out final location, the mounting means is comparatively simple, convenient, improves the packaging efficiency when guaranteeing that the assembly yield is high. The mounting posts 113 and the mounting holes 1122 are preferably attached by interference fit, but may be welded, glued, or screwed as required for actual production.

In the embodiment, the driving gear 13 includes an upper gear 131 and a lower gear 132 mounted at a lower end of the upper gear 131, the lower gear 132 is mainly used for connecting a power device, and the upper gear 131 is rotatably mounted on a second mounting shaft 133. Compared with the conventional arrangement that the upper gear and the lower gear are both assembled on corresponding mounting shaft structures, the arrangement that the lower gear 132 is assembled on the upper gear 131 and then the upper gear 131 is mounted on the second mounting shaft 133 is utilized; the problem that the coaxiality of the three parts has deviation due to inaccurate assembly can be solved, and the running smoothness of the clutch structure 10 is further improved. Moreover, the diameter of the lower gear 132 is larger than that of the upper gear 131, so that the lower gear 132 is easily arranged without interfering with the swing of the elastic sheet 11 when being connected to a corresponding power device. The upper shrapnel 1101 is positioned at the upper end of the upper gear 131 and limited by the second mounting shaft 133; the lower spring plate 1102 is located at the upper end of the lower gear 132 and is limited by the upper gear 131; the planetary gears 12 are engaged with the upper gear 131. Specifically, a limited concave portion 1121 is disposed on a side of the upper spring 1101 opposite to the clamping end 112, and the upper spring 1101 is limited to the second mounting shaft 133 by the limited concave portion 1121. The clamping end 112 of the lower elastic sheet 1102 is limited at two sides of the upper gear 131, and the upper elastic sheet 1101 is limited at the second mounting shaft 113 through the limited concave 1121, so that the structure arrangement can ensure that the elastic sheet 11 is more stable and reliable in the process of deflection.

(see fig. 5-8) the reducer includes a motor 20 and an output member 30, in the embodiment of the present application, the motor 20 is connected to the driving gear 13 through at least one reduction gear set 40, and the output end of the motor 20 is provided with a worm connected to the reduction gear set. When the driving gear 13 drives the planetary gear 12, the elastic sheet 11 rotates together with the driving gear 13; the planetary gear 12 is selectively engaged with the output member 30 when the elastic piece 11 swings. Specifically, when the driving gear 13 rotates in the forward direction, the planetary gear 12 rotates with the rotation of the driving gear 13, and the elastic piece 11 is biased in the forward direction by a force generated by friction between the driving gear 13 and the planetary gear 12, so that the planetary gear 12 can be engaged with the output member 30. The output element 30 is provided with at least a first toothing 31 and a second toothing 32, the planet gear 12 being in engagement with the first toothing 31, the second toothing 32 being primarily intended for connection to the respective component to be driven. In the embodiment of the present application, the reduction gear set 40, the clutch structure 10 and the output member 30 are installed in the casing 50; the motor 20 is installed outside the casing 50, and an output end of the motor 20 extends into the casing 50 and is connected with the reduction gear set 40.

(see fig. 9 and 10) the elastic sheet 11 is provided with a torsion spring 114, and the torsion spring 114 includes a spiral body 1141 and two torsion arms 1142; the elastic sheet 11 is provided with a first limiting part 115, and the first limiting column 115 is arranged at the elastic end 111 of the upper elastic sheet 1101; the upper surface of the interior of the housing 50 is provided with a second position-limiting portion 51, and the torsion arm 1142 is limited by the first position-limiting portion 115 and the second position-limiting portion 51. When the elastic piece 11 rotates and swings in the forward direction, one of the torsion arms 1142 moves in the forward direction along with the elastic piece 11, and the other torsion arm 1142 is limited by the second limiting portion 51; when the elastic plate 11 swings in the opposite direction, the other torsion arm 1142 moves in the opposite direction along with the elastic plate 11, and one torsion arm 1142 is limited by the second position-limiting portion 51. Thus, when the elastic piece 11 swings to enable the planetary gear 12 to be meshed with the output member 30, and the torsion spring 114 swings along with the elastic piece 11, the torsion spring 114 deforms to store elastic potential energy; after the motor 20 stops working, the elastic potential energy of the torsion spring 114 acts on the elastic piece 11 to return to the direction, so that the planetary gear 12 and the output member 30 are disengaged. The torsion spring 114 is used for resetting the elastic sheet 11 in a mechanical resetting mode, so that the number of forward and reverse rotation of the motor 20 can be reduced compared with the conventional mode of needing motor control, and the service life of the motor 20 is prolonged. The upper surface of the interior of the casing is further provided with a limiting groove 52, and the first limiting part 115 can be selectively limited in the limiting groove 52; the first limiting portion 115 is limited in the limiting groove 52, so that the elastic piece 11 can be prevented from excessively deflecting, and the clutch structure 10 can be prevented from being damaged.

The utility model discloses a design focus lies in: the planet gear is arranged at the clamping end of the elastic sheet through the arranged elastic sheet; the elastic sheet provides elasticity, so that when the planetary gear and the driving gear are abraded, the elastic sheet can be utilized to automatically adjust the center distance between the planetary gear and the driving gear; the friction coefficient between the planetary gear and the driving gear is not reduced due to abrasion, so that the planetary gear is always meshed with the driving gear and keeps proper friction; compared with the traditional swing block swing type clutch structure, the clutch structure has the advantages that the clutch stability can be further improved, and the service life of the clutch structure can be prolonged.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides an automatic adjust separation and reunion structure of centre-to-centre spacing which characterized in that: the clutch structure (10) comprises an elastic sheet (11), a planetary gear (12) and a driving gear (13); the elastic piece (11) is arranged on the driving gear (13), and the elastic piece (11) is provided with an elastic end (111) and a clamping end (112); the planetary gear (12) is arranged at the clamping end (112), and the elastic sheet (11) provides elastic force to keep the planetary gear (12) meshed with the driving gear (13).

2. The clutch structure of automatically adjusting a center distance according to claim 1, wherein: the elastic piece (11) is provided with two clamping ends (112) which are respectively integrally formed on two sides of the elastic end (111) and are arranged in a U shape or a V shape.

3. The clutch structure of automatically adjusting a center distance according to claim 1 or 2, characterized in that: the elastic sheet (11) comprises an upper elastic sheet (1101) and a lower elastic sheet (1102), and the planetary gear (12) is located between the upper elastic sheet (1101) and the lower elastic sheet (1102).

4. The clutched structure for automatically adjusting the center distance as claimed in claim 3, wherein: the clamping ends (112) of the upper spring plate (1101) and the lower spring plate (1102) are connected with a first mounting shaft (113), and the planetary gear (12) is rotatably mounted on the first mounting shaft (113).

5. The clutched structure for automatically adjusting the center distance as claimed in claim 3, wherein: the driving gear (13) comprises an upper gear (131) and a lower gear (132) arranged at the lower end of the upper gear (131), and the upper gear (131) is rotatably arranged on a second mounting shaft (133);

the upper shrapnel (1101) is positioned at the upper end of the upper gear (131) and limited by the second mounting shaft (133);

the lower spring plate (1102) is positioned at the upper end of the lower gear (132) and limited by the upper gear (131);

the planetary gear (12) is meshed with the upper gear (131).

6. The clutched structure for automatically adjusting the center-to-center distance as claimed in claim 5, wherein: a limited concave position (1121) is arranged on one side, opposite to the clamping end (112), of the upper elastic sheet (1101), and the upper elastic sheet (1101) is limited to the second mounting shaft (133) through the limited concave position (1121).

7. A speed reducer, characterized in that: comprising a clutch structure (10) according to any one of claims 1 to 5, an electric machine (20) and an output member (30); the motor (20) is connected with the driving gear (13) through at least one group of reduction gear groups (40), and when the driving gear (13) drives the planetary gear (12), the elastic sheet (11) rotates together with the driving gear (13); when the elastic piece (11) swings, the planetary gear (12) can be selectively meshed with the output piece (30).

8. A decelerator according to claim 7, wherein: the speed-reducing gear set comprises a shell (50), wherein the speed-reducing gear set (40), the clutch structure (10) and the output piece (30) are arranged in the shell (50); the motor (20) is arranged on the outer side of the machine shell (50), and the output end of the motor (20) extends into the machine shell (50) and is connected with the speed reduction gear set (40).

9. A decelerator according to claim 8, wherein: the elastic sheet (11) is provided with a torsion spring (114), and the torsion spring (114) comprises a spiral body (1141) and two torsion arms (1142); the elastic piece (11) is provided with a first limiting part (115), the upper surface inside the shell (50) is provided with a second limiting part (51), and the torsion arm (1142) is limited by the first limiting part (115) and the second limiting part (51);

when the elastic piece (11) rotates towards the positive direction and swings, one torque arm (1142) moves along the positive direction along with the elastic piece (11), and the other torque arm (1142) is limited by the second limiting part (51);

when the elastic piece (11) rotates and swings reversely, the other torsion arm (1142) moves reversely along with the elastic piece (11), and one torsion arm (1142) is limited by the second limiting part (51).

10. A decelerator according to claim 9, wherein: the upper surface of the interior of the shell is also provided with a limiting groove (52), and the first limiting part (115) can be selectively limited in the limiting groove (52).