CN217002774U

CN217002774U - Encircling clutch

Info

Publication number: CN217002774U
Application number: CN202220737450.9U
Authority: CN
Inventors: 金冠宇; 易果; 肖国平
Original assignee: Chongqing Huashidan Agricultural Equipment Manufacturing Co ltd
Current assignee: Chongqing Huashidan Agricultural Equipment Manufacturing Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-19
Anticipated expiration: 2032-03-30

Abstract

The utility model relates to the field of clutches and discloses an encircling clutch which comprises a clutch shell, a planetary gear mechanism arranged in the clutch shell, two encircling shoe blocks arranged in the clutch shell and a protective cover positioned on the outer side of the planetary gear mechanism, wherein the protective cover is connected with a planetary wheel shaft of the planetary gear mechanism, and the encircling shoe blocks encircle the outer side of the protective cover and are used for encircling a brake protective cover through the two encircling shoe blocks. The utility model can solve the problems that the direct braking of the external gear ring in the prior art can lead to accelerated abrasion and is inconvenient to maintain.

Description

Encircling clutch

Technical Field

The utility model relates to the field of clutches, in particular to a wrap-around clutch.

Background

The friction clutch is a clutch which is widely applied and has the longest history, and basically comprises a driving part, a driven part, a pressing mechanism and an operating mechanism. The driving part, the driven part and the pressing mechanism are basic structures for ensuring that the clutch is in an engaged state and can transmit power, and the operating mechanism of the clutch is mainly a device for separating the clutch. In the farming machines on the market at present, the clutches are all friction type centrifugal clutches or friction type shifting clutches. The friction type centrifugal clutch and the friction type shifting clutch are both active parts and are in contact braking from inside to outside, so that the clutch structure is fundamentally large in size, and the requirement for reducing the size of an agricultural machine cannot be met.

In order to solve the above problems, as in chinese patent, the publication number is: the embracing clutch provided by CN210565883U meets the use requirements of a mini-tiller, the patent technology comprises a clutch housing, a planetary gear mechanism arranged in the clutch housing, an input shaft positioned on one side of the input end of the clutch housing, an output shaft positioned on the output end of the clutch housing, and two embracing shoe blocks arranged in the clutch housing, wherein the input shaft and the output shaft are respectively positioned on two sides of the planetary gear mechanism and are respectively matched with the planetary gear mechanism and transmit, and the embracing shoe blocks embrace the outer ring of an outer gear ring of the planetary gear mechanism and brake the outer gear ring through the embracing of the two embracing shoe blocks.

However, in the clutch structure, when braking is carried out, the outer gear ring is directly embraced by the embracing shoe block, and the outer gear ring bears the planetary gear mechanism, so that the outer gear ring is one end of power in the long-term use process, and the planetary gear transmits torque after the outer gear ring is stopped in the braking process, so that the planetary gear disc and the output shaft are pushed to rotate, the power transmission stages are more, if the outer gear ring needs to be effectively braked, the force application to the outer gear ring needs to be larger, and the abrasion to the outer gear ring is larger and faster; on the other hand, outer ring gear is located planet wheel mechanism's the most inboard, need dismantle many spare parts such as sun gear axle, planet wheel axle, planet fluted disc in proper order earlier when the wearing and tearing back maintenance is changed and just can change or maintain outer ring gear, complex operation to the in-process leads to each assembly size's error grow easily, leads to producing vibration, noise in the follow-up working process of clutch, and life shortens gradually.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a wrap-around clutch to solve the problems that in the prior art, the direct braking of an outer gear ring can cause accelerated abrasion and is inconvenient to maintain.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides an encircling clutch, includes clutch housing, locates the planetary gear mechanism in the clutch housing, locates two blocks of embracing the hoof piece in the clutch housing, still including the protection casing that is located the planetary gear mechanism outside, protection casing and planetary gear mechanism's planet wheel hub connection, encircle the hoof piece and encircle in the outside of protection casing and through the embracing brake protection casing of two blocks of embracing the hoof piece.

The principle and the advantages of the scheme are as follows: in practical application, the protective cover is positioned on the outer side of the planetary gear mechanism, the protective cover is connected with the planetary gear mechanism through the planetary gear shaft, and the protective cover rotates under the pushing of the planetary gear shaft during working. When braking is carried out, the shoe block is encircled to directly hold the protective cover tightly, the protective cover is held tightly to stop rotating, and then the planetary gear shaft is braked, so that the planetary gear pushes the gear ring to rotate, and then the planetary gear mechanism starts to work. The protection casing is located the planetary gear outside in this scheme, and the shoe piece is not direct action in the planetary gear mechanism is surroundd to the braking in-process, consequently can not cause wearing and tearing to planetary gear mechanism's outer ring gear and other structures, and the protection casing is located the planetary gear mechanism outside, even if also can follow the convenient dismantlement in the outside after the wearing and tearing and maintain or change.

Preferably, as an improvement, the protective cover covers the outer side of the planetary gear mechanism from the side facing away from the outer ring gear of the planetary gear mechanism. The tip outside dismouting of clutch can be followed to the protection casing like this, and the dismouting is maintained more conveniently, and the protection casing can provide isolation protection to planetary gear mechanism, avoids in the long-term use piece, impurity to get into among the planetary gear mechanism and influences its job stabilization nature.

Preferably, as an improvement, a support member for supporting the shield is provided inside the clutch housing, and the shield is in contact with the support member. The supporting piece can provide more stable support for the protection cover, so that the protection cover is kept stable, and the protection cover is prevented from deflecting and is prevented from being worn due to accidental contact with the shoe block surrounding the protection cover in the working process.

Preferably, as an improvement, the support member is a rolling member, and the support member is in rolling contact with the shield. Therefore, the supporting piece can provide stable support for the protective cover, the protective cover is guaranteed to be stable, the protective cover can be guaranteed to rotate smoothly along with the planetary gear mechanism, and abrasion and friction noise are reduced.

Preferably, as an improvement, the support member is a ball, and at least three spherical grooves are uniformly distributed on the inner side of the clutch housing in an annular manner, and the ball is located in the spherical groove. The spherical groove can be stably placed on the balls, the balls can flexibly rotate, the protective cover can be stably supported through three points, and the balls can guarantee that the protective cover is stably and smoothly supported in a rolling mode.

Preferably, as an improvement, the end part of the shield in the clutch housing is folded outwards to form a support edge, and the balls are in rolling contact with the support edge. Therefore, the protective cover can have a larger contact surface for the rolling contact of the rolling balls, and the stable and reliable support and rolling between the rolling balls and the protective cover are ensured.

Preferably, as an improvement, the protective cover is provided with positioning holes, the number of the positioning holes corresponds to the number of the planet wheel shafts of the planet wheel mechanism, and the planet wheel shafts are inserted into the positioning holes. The protection casing is connected through the cartridge with the planet wheel hub connection like this and is realized, succinctly reliable, and power transmission is stable.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the clutch comprises a clutch shell 1, a surrounding shoe block 2, a protective cover 3, a planet wheel shaft 4, a sun wheel shaft 5, balls 6, an outer gear ring 7, a planet fluted disc 8 and a supporting edge 9.

The embodiment is basically as shown in the attached figures 1 and 2: the utility model provides an encircling clutch, includes clutch housing 1, locates the planetary gear mechanism in clutch housing 1, locates two shoes of embracing 2 in clutch housing 1, and two shoes of embracing 2 encircle the planetary gear mechanism outside. The planetary gear mechanism further comprises a protective cover 3 positioned on the outer side of the planetary gear mechanism, and the protective cover 3 covers the outer side of the planetary gear mechanism from the side facing away from the outer gear ring 7 of the planetary gear mechanism. The protective cover 3 is connected with a planetary wheel shaft 4 of the planetary gear mechanism, positioning holes are formed in the protective cover 3, the number of the positioning holes corresponds to that of the planetary wheel shaft 4 of the planetary gear mechanism, the planetary wheel shaft 4 is inserted into the positioning holes, and the encircling shoe blocks 2 encircle the outer side of the protective cover 3 and brake the protective cover 3 through the encircling of the two encircling shoe blocks 2.

1 inboard of clutch housing is equipped with the support piece that provides the support for protection casing 3, and support piece is ball 6, and 1 inboard of clutch housing is the annular equipartition and has three spherical groove, and ball 6 is located the spherical inslot. The end part of the protective cover 3 positioned in the clutch shell 1 is folded outwards to form a supporting edge 9, and the ball 6 is in rolling contact with the supporting edge 9.

The specific implementation process is as follows: during the working process of the encircling clutch, power input and power output are respectively connected with a sun gear shaft 5 and a planetary fluted disc 8 of a planetary gear mechanism, after the encircling shoe block 2 tightly embraces the protective cover 3 from the outer side, the sun gear shaft 5 drives the sun gear to rotate, the sun gear is in meshing transmission with the planet gears, the planet gears are simultaneously meshed with an outer gear ring 7, the planet gears drive the protective cover 3 to rotate through a planet gear shaft 4 during the rotating process, and the protective cover 3 stops rotating under the support of balls 6. During braking, the protective cover 3 is loosened from the outer side by surrounding the shoe block 2, so that the protective cover 3 freely rotates, and the planet wheel shaft 4 freely moves. Adopt such structure, loosen the in-process and encircle hoof piece 2 not with protection casing 3 effect, can not lead to the fact wearing and tearing to planetary gear mechanism, the long-term use in-process of protection casing 3 contacts with embracing hoof piece 2, ball 6 and planet wheel axle 4 make protection casing 3 remain stable, can directly pull down from the planetary gear mechanism outside after the wearing and tearing and change or maintain, the simple operation need not operate planetary gear mechanism, can guarantee planetary gear mechanism's life.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, and these should also be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides an encircling clutch, includes clutch housing, locates the planetary gear mechanism in the clutch housing, locates two blocks of embracing hoof pieces in the clutch housing, its characterized in that: the brake device is characterized by further comprising a protective cover positioned on the outer side of the planetary gear mechanism, the protective cover is connected with a planetary wheel shaft of the planetary gear mechanism, and the encircling shoe blocks encircle the outer side of the protective cover and brake the protective cover through the encircling of the two encircling shoe blocks.

2. The wrap clutch of claim 1, wherein: the protective cover covers the outer side of the planetary gear mechanism from the side deviating from the outer gear ring of the planetary gear mechanism.

3. The wrap clutch of claim 2, wherein: the inside support piece that provides the support for the protection casing that is equipped with of clutch housing, the protection casing contacts with support piece.

4. The wrap clutch of claim 3, wherein: the supporting piece is a rolling piece, and the supporting piece is in rolling contact with the protective cover.

5. The wrap clutch of claim 4, wherein: the support piece is a ball, at least three spherical grooves are uniformly distributed on the inner side of the clutch shell in an annular mode, and the ball is located in the spherical groove.

6. The wrap clutch of claim 5, wherein: the end part of the protective cover, which is positioned in the clutch shell, is turned outwards to form a supporting edge, and the ball is in rolling contact with the supporting edge.

7. The wrap clutch of claim 1, wherein: the protective cover is provided with positioning holes, the number of the positioning holes corresponds to the number of the planet wheel shafts of the planetary gear mechanism, and the planet wheel shafts are inserted into the positioning holes.