CN220622534U

CN220622534U - Flexible transmission shaft

Info

Publication number: CN220622534U
Application number: CN202320977510.9U
Authority: CN
Inventors: 徐小杰
Original assignee: Jiangsu World Plant Protecting Machinery Co Ltd
Current assignee: Jiangsu World Plant Protecting Machinery Co Ltd
Priority date: 2023-04-26
Filing date: 2023-04-26
Publication date: 2024-03-19
Anticipated expiration: 2033-04-26

Abstract

The utility model provides a flexible transmission shaft which comprises a first universal joint, wherein one end of a transmission shell is fixedly connected with the first universal joint, and the other end of the transmission shell is covered with an end cover. The rectangular shaft extends through the end cap into the drive housing. One end of the rectangular shaft is fixedly connected with the second universal joint. One end of the rectangular shaft is round, the other end of the rectangular shaft is rectangular, and a flange is arranged at the head of one end of the rectangle. The rectangular section part of the rectangular shaft is sleeved with a plurality of spring pressing plates and spring fixing plates, the spring pressing plates and the spring fixing plates are arranged at intervals, the spring fixing plates are fixedly connected with the transmission shell, and a circular through hole is formed in the center of the spring fixing plates. The center of the spring pressing plate is provided with a rectangular through hole, and the size of the through hole is consistent with the size of the rectangular section of the rectangular shaft. Two springs are symmetrically arranged on the left side and the right side of each spring fixing plate along the circumference. The utility model enables the transmission shaft to be connected in a positive and negative rotation transmission way, and can buffer the torque, thereby achieving the beneficial effect of prolonging the service life of the transmission shaft.

Description

Flexible transmission shaft

Technical Field

The utility model relates to the technical field of agricultural machinery, in particular to the technical field of agricultural machinery transmission.

Background

The transmission shaft is an important part for transmitting power in a mechanical transmission system, and the transmission shaft and a drive axle together transmit the power of an engine to wheels so that the machine generates driving force.

The utility model discloses an agricultural machinery transmission shaft with the bulletin number of CN211550325U, which is named as an agricultural machinery transmission shaft, and comprises a spline shaft, a spline sleeve fork and a shaft tube, wherein the spline shaft is in sliding connection with the spline sleeve fork, the spline sleeve fork is connected with a first flange fork through a universal joint, the spline shaft is connected with the shaft tube, a welding fork is arranged at the end part of the shaft tube, and the welding fork is connected with a second flange fork through the universal joint; the universal joint is an inner clamping type universal joint, the structure is reasonable, the universal joint adopts the inner clamping type universal joint, the rotary diameter is small, the weight is light, however, the buffer in the torsion direction is absent in the technical scheme, the impact can be generated on the spline shaft and the spline housing fork, and the transmission shaft and related parts are easy to damage after long-term use.

Disclosure of Invention

In order to solve the problem that the transmission shaft in the prior art lacks torsional direction buffering in the power transmission process.

The utility model provides a flexible transmission shaft. The utility model is realized by the following technical scheme:

the utility model provides a flexible drive shaft, contains first universal joint, and the drive shell is the hollow barreled structure of one end opening, the drive shell blind end with first universal joint fixed connection, drive shell open end department lid closes the end cover, end cover passes through fixation nut and drive shell fixed connection. A rectangular shaft extends into the drive housing through the end cap. The contact part of the end cover and the rectangular shaft is provided with a rolling bearing, and the rectangular shaft extends out of the transmission housing part and is fixedly connected with the second universal joint. The section of the connecting part of the rectangular shaft and the second universal joint is circular, the section of the part extending into the transmission housing is rectangular, a flange is arranged at one end head of the rectangle, and the outer diameter of the flange is larger than the diagonal length of the rectangular section of the rectangular shaft. The rectangular section part of the rectangular shaft is sleeved with a plurality of spring pressing plates and spring fixing plates, the spring pressing plates and the spring fixing plates are arranged at intervals, the spring fixing plates are fixedly connected with the transmission shell, a circular through hole is formed in the center of each spring fixing plate, and the aperture of the through hole is larger than the diagonal length of the rectangular section of the rectangular shaft. The spring pressing plate is movably connected with the transmission shell, a rectangular through hole is formed in the center of the spring pressing plate, and the size of the through hole is consistent with that of the rectangular section of the rectangular shaft. Two springs are symmetrically arranged on the left side and the right side of each spring fixing plate along the circumference. And a spring limiting protrusion is arranged at the contact part of the spring fixing plate and the spring.

Further, the transmission shell comprises two semicircular steel plates, two steel bars are fixedly connected to the joint of the semicircular steel plates respectively, and the connector is fixedly connected to one end of each semicircular steel plate. The length of the steel bar is greater than that of the semicircular steel plate, and the part of the steel bar exceeding the semicircular steel plate is provided with threads. The spring fixing plate is provided with a through hole at the corresponding position of the steel bar, the size of the through hole is equal to the diameter of the steel bar, and the spring fixing plate is fixedly connected with the transmission shell through the steel bar. The spring pressing plate is provided with a waist-shaped through hole at a position corresponding to the steel bar.

Furthermore, the fixed connection mode of the steel bars, the connectors and the two semicircular steel plates is welding.

Further, the rectangular cross section of the rectangular shaft is square.

Further, the fixing nuts are two hexagon nuts.

Further, the transmission shell is fixedly connected with the first universal joint, and the second universal joint is fixedly connected with the rectangular shaft through fixing pins.

Further, the dislocation angle between the spring fixing plate and the spring pressing plate is 15 degrees.

Further, a plurality of adjusting pads are arranged between the rectangular shaft and the closed end of the transmission shell.

Further, a dust cover is additionally arranged at the joint of the universal joint.

Further, the dust cover is made of rubber.

According to the utility model, as the spring fixing plate, the spring pressing plate, the springs symmetrically arranged along the circumference and the rectangular shaft are arranged, the transmission shaft can be connected in a forward and reverse rotation transmission manner, and the torque can be buffered, so that the service life of the transmission shaft is prolonged.

Advantages and features of the utility model will be illustrated and explained by the following non-limiting description of preferred embodiments, given by way of example only with reference to the accompanying drawings.

Drawings

Fig. 1 is an axial view of the present utility model.

Fig. 2 is a cross-sectional view of fig. 1 A-A.

Fig. 3 is a cross-sectional view of fig. 2 A-A.

Fig. 4 is a cross-sectional view of fig. 2B-B.

Fig. 5 is a partial structural view of the transmission housing.

Fig. 6 is a cross-sectional view of fig. 5 A-A.

Fig. 7 is a cross-sectional view of fig. 5B-B.

Fig. 8 is a partial structural view of a rectangular shaft.

Fig. 9 is a cross-sectional view of fig. 8 A-A.

Fig. 10 is a cross-sectional view of fig. 8B-B.

The figures indicate:

1. a transmission housing; 2. a first universal joint; 3. a second universal joint; 4. a rectangular shaft; 5. an end cap; 6. a spring pressing plate; 7. a spring; 8. a spring fixing plate; 9. a bushing; 10. rolling a bearing; 11. an adjustment pad; 12. a fixing pin; 13. a fixing nut; 14. a dust cover; 101. a semicircular steel plate; 102. a connector; 103. reinforcing steel bars; 801. the spring is limited to be convex.

Detailed Description

The present application is further described below with reference to the drawings and examples.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-10, the utility model provides a flexible transmission shaft, which comprises a first universal joint 2, wherein a transmission shell 1 is of a hollow barrel structure with one end open, the closed end of the transmission shell 1 is fixedly connected with the first universal joint 2, an end cover 5 covers the open end of the transmission shell 1, and the end cover 5 is fixedly connected with the transmission shell 1 through a fixing nut 13. Preferably, the fixing nuts 13 are two hexagonal nuts. A rectangular shaft 4 extends through the end cap 5 into the transmission housing 1. The contact part of the end cover 5 and the rectangular shaft 4 is provided with a rolling bearing 10, so that the transmission shaft keeps a straight line when rotating transmission torque, and transmission power loss is reduced. The part of the rectangular shaft 4 extending out of the transmission housing 1 is fixedly connected with the second universal joint 3. The section of the connecting part of the rectangular shaft 4 and the second universal joint 3 is round, the section of the part extending into the transmission housing 1 is rectangular, and preferably, the rectangular section is square. A flange is arranged at one end part of the rectangle, and the outer diameter of the flange is larger than the diagonal length of the rectangular section of the rectangle shaft 4. The rectangular section part of the rectangular shaft 4 is sleeved with a plurality of spring pressing plates 6 and spring fixing plates 8, the spring pressing plates 6 and the spring fixing plates 8 are arranged at intervals, the spring fixing plates 8 are fixedly connected with the transmission housing 1, a circular through hole is formed in the center of each spring fixing plate 8, and the aperture of the through hole is larger than the diagonal length of the rectangular section of the rectangular shaft 4. The spring pressing plate 6 is movably connected with the transmission housing 1, a rectangular through hole is formed in the center of the spring pressing plate 6, and the size of the through hole is consistent with that of the rectangular section of the rectangular shaft 4. The spring fixing plate 8 and the spring pressing plate 6 can rotate in a staggered manner by a certain angle. Preferably, the misalignment angle is 15 °. Two springs 7 are symmetrically arranged on the left side and the right side of each spring fixing plate 8 along the circumference. In order to keep the springs 7 upright all the time in the use process, the operation of the adjacent springs is not influenced by larger displacement, and a spring limiting protrusion 801 is arranged at the contact part of the spring fixing plate 8 and the springs 7. In order to prevent fine particles such as dust and oil dirt from penetrating into the joint of the universal joint to damage the transmission shaft, a dust cover 14 is additionally arranged at the joint of the universal joint, and the dust cover is preferably made of rubber.

During operation, the first universal joint 2 rotates to drive the transmission housing 1 to rotate, and the transmission housing 1 drives the spring fixing plate 8 and the spring 7 to keep relative positions to rotate around the rectangular shaft 4 together. At this time, the transmitted force is transmitted to the spring pressing plate 6 by the spring 7, the force is transmitted to the rectangular shaft 4 through the spring pressing plate 6, and finally the rectangular shaft 4 transmits the force to the second universal joint 3.

Preferably, the transmission housing 1 comprises two semicircular steel plates 101, two steel bars 103 are respectively and fixedly connected to the joints of the semicircular steel plates 101, and a connector 102 is fixedly connected to one end of the semicircular steel plates 101. The length of the steel bar 103 is greater than that of the semicircular steel plate 101, and the part of the steel bar 103 exceeding the semicircular steel plate 101 is provided with threads. Preferably, the steel bar 103, the connector 102 and the two semicircular steel plates 101 are welded together respectively. The spring fixing plate 8 is provided with through holes at positions corresponding to the steel bars 103, the size of each through hole is equal to the diameter of the steel bar 103, and the spring fixing plate 8 is fixedly connected with the transmission shell through the steel bars 103. The spring pressing plate 6 is provided with a waist-shaped through hole at a position corresponding to the steel bar 103, so that the spring pressing plate 6 and the spring fixing plate 8 can rotate in a dislocation manner.

Preferably, the transmission housing 1 is fixedly connected with the first universal joint 2 and the second universal joint 3 is fixedly connected with the rectangular shaft 4 by adopting a fixing pin 12.

In order to enable the drive shaft to be adapted to different length requirements, a number of adjustment pads 11 are provided between the rectangular shaft 4 and the closed end of the drive housing 1. The effective adjustment distance of the transmission shaft is the total thickness of the plurality of adjustment pads 11 minus the thickness of the flange at the end part of the rectangular shaft 4.

In addition to the above embodiments, other embodiments may be provided, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of protection claimed in the present application.

Claims

1. A flexible drive shaft comprising a first universal joint (2), characterized in that: the novel transmission device is characterized by further comprising a transmission housing (1), wherein the transmission housing (1) is of a hollow barrel structure with one end opening, the closed end of the transmission housing (1) is fixedly connected with the first universal joint (2), the end cover (5) is covered at the opening end of the transmission housing (1), the end cover (5) is fixedly connected with the transmission housing (1) through a fixing nut (13), a rectangular shaft (4) penetrates through the end cover (5) to extend into the transmission housing (1), a rolling bearing (10) is arranged at the contact part of the end cover (5) and the rectangular shaft (4), the part of the rectangular shaft (4) extending out of the transmission housing (1) is fixedly connected with the second universal joint (3), the part of the rectangular shaft (4) and the second universal joint (3) are circular, the part of the transmission housing (1) is rectangular, a flange is arranged at the head of one end of the rectangle, the flange is larger than the length of the rectangular section diagonal of the rectangular shaft (4), a rectangular pressing plate (6) is sleeved at the part of the rectangular shaft (4) and a rectangular pressing plate (8), the rectangular pressing plate (8) is fixedly connected with the rectangular pressing plate (8) and the rectangular pressing plate (8) at a certain distance from the center of the rectangular pressing plate (8), the spring pressing plate (6) is movably connected with the transmission casing (1), a rectangular through hole is formed in the center of the spring pressing plate (6), the size of the through hole is consistent with that of the rectangular section of the rectangular shaft (4), two springs (7) are symmetrically arranged on two sides of each spring fixing plate (8) along the circumference, and a spring limiting protrusion (801) is arranged at the contact part of each spring fixing plate (8) and each spring (7).

2. The flexible transmission shaft according to claim 1, wherein the transmission housing (1) comprises two semicircular steel plates (101), two steel bars (103) are fixedly connected to the joint of the semicircular steel plates (101) respectively, the connector (102) is fixedly connected to one end of the semicircular steel plates (101), the length of each steel bar (103) is larger than that of each semicircular steel plate (101), threads are arranged on the portion, exceeding the semicircular steel plates (101), of each steel bar (103), through holes are formed in positions corresponding to the steel bars (103), the size of each through hole is equal to the diameter of each steel bar (103), the spring fixing plates (8) are fixedly connected with the transmission housing (1) through the corresponding steel bars (103), and waist-shaped through holes are formed in positions corresponding to the steel bars (103) by the spring pressing plates (6).

3. The flexible transmission shaft according to claim 2, wherein the steel bar (103), the connector (102) and the two semicircular steel plates (101) are fixedly connected in a welding mode.

4. Flexible drive shaft according to claim 1, characterized in that the rectangular shaft (4) has a square rectangular cross section.

5. Flexible drive shaft according to claim 1, characterized in that the fixing nut (13) is two hexagonal nuts.

6. Flexible drive shaft according to claim 1, characterized in that the drive housing (1) is fixedly connected with the first universal joint (2) and the second universal joint (3) with the rectangular shaft (4) by means of a fixing pin (12).

7. Flexible drive shaft according to claim 1, characterized in that the misalignment angle between the spring fixing plate (8) and the spring pressure plate (6) is 15 °.

8. Flexible drive shaft according to claim 1, characterized in that a number of adjustment pads (11) are arranged between the rectangular shaft (4) and the closed end of the drive housing (1).

9. Flexible drive shaft according to any of claims 1 to 8, characterized in that the first universal joint (2) and the second universal joint (3) are sleeved with a dust cover (14).

10. Flexible drive shaft according to claim 9, characterized in that the dust cover (14) is made of a rubber material.