CN121828362A

CN121828362A - Swing claw type transmission shaft protector

Info

Publication number: CN121828362A
Application number: CN202311271900.5A
Authority: CN
Inventors: 朱威威; 刘薇薇; 虞军; 耿峰
Original assignee: Yancheng Wisdom Equipment Co ltd
Current assignee: Yancheng Wisdom Equipment Co ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2026-04-10

Abstract

The invention provides a swing claw type transmission shaft protector which comprises a clutch assembly base, a clutch assembly, a joint fork and a swing claw, wherein the clutch assembly, the joint fork and the swing claw are arranged on the clutch assembly base, the clutch assembly base comprises a base and a connecting shaft, a first annular groove is formed between a first shaft body and a second shaft body, the clutch assembly comprises a clutch main body, a bottom pressing plate, a friction plate, a middle pressing plate and a compression spring, the clutch main body is inserted into the first annular groove and is formed into a containing cavity with the second shaft body, the friction plate is arranged in the containing cavity and is fixed through the compression spring, the upper end of the clutch main body is provided with a mounting groove of the joint fork, the joint fork is provided with a second annular groove, the second annular groove is internally provided with the swing claw, and the clutch main body is provided with swing claw inner teeth matched with the swing claw. The invention can cut off power autonomously and protect the driving system and the working parts of the pickup baler.

Description

Swing claw type transmission shaft protector

Technical Field

The invention belongs to the technical field of transmission shaft protection devices, and particularly relates to a swing claw type transmission shaft protector.

Background

Currently, transmission shaft protectors used for pickup bundling machines in agricultural machinery in China generally comprise friction plate type protectors, cam type protectors and marble type protectors, and friction plate type protectors are used in most cases. Such protectors are typically shipped for use by a user by calibrating the maximum torque transmitted by a dedicated calibration device prior to shipment. The friction plate type protector transmits torque under rated torque, and when overload occurs, the friction plates slide to limit the transmission of effective torque, so as to achieve the function of protecting equipment. However, the friction plate protector cannot automatically cut off the power function when the operation of the pick-up bundling machine is in a blocking or blocking state due to the limitation of the structure, and the power continues to drive equipment, so that the friction plate protector continues to operate, friction is increased, and further the friction plate of the protector is burnt out and damaged, and the mechanical operation is affected.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention provides the swing claw type transmission shaft protector which can cut off power automatically and protect the transmission system and the working parts of the pickup baler.

In order to achieve the above purpose, the present invention provides the following technical solutions:

A swing claw type transmission shaft protector comprises a clutch assembly base, a clutch assembly, a yoke and a swing claw, wherein the clutch assembly, the yoke and the swing claw are arranged on the clutch assembly base;

The clutch assembly base comprises a base and a connecting shaft, the connecting shaft is arranged on the base, the base is fixedly connected with a flywheel of the pick-up bundling machine through bolts, the connecting shaft consists of a first shaft body and a second shaft body, and a first annular groove is formed between the first shaft body and the second shaft body;

The clutch assembly comprises a clutch main body, a bottom pressing plate, friction plates, a middle pressing plate and a compression spring, wherein the clutch main body is inserted in a first annular groove and forms a containing cavity with a second shaft body, the friction plates are installed in the containing cavity and are provided with a plurality of friction plates, the friction plates are clamped with the second shaft body, the middle pressing plate is arranged between the adjacent friction plates, the bottom pressing plate is installed at the tail end of the containing cavity, bolts penetrate through the middle pressing plate and the clutch main body, the compression spring is sleeved on the bolts, and the bolts are screwed and fixed through nuts;

the upper end of the clutch main body is provided with a mounting groove of the yoke, the first shaft body protrudes out of the mounting groove and is coaxial with the yoke, the yoke can rotate relative to the first shaft body, and a space is reserved between the yoke and the clutch main body;

the joint fork is provided with a second annular groove, one or more throwing claws are arranged in the second annular groove, the swing claw is connected with the yoke through a swing claw shaft, the swing claw can rotate relative to the yoke, and swing claw inner teeth matched with the swing claw are formed in the clutch main body.

Further, the device also comprises a pin shaft, and the joint fork and the throwing claw shaft are axially fixed by the pin shaft.

Further, a first copper sleeve is sleeved on the first shaft body, is arranged between the first shaft body and the clutch main body, is in interference press fit with the clutch main body, forms non-homogeneous abrasion between the first shaft body and the clutch main body, and has a friction coefficient mu less than or equal to 0.03.

Further, the first shaft body is sleeved with a second copper sleeve, and the second copper sleeve is arranged between the first shaft body and the yoke and is in interference press fit with the yoke.

Further, an external spline is arranged on the second shaft body, a friction plate inner hole spline is arranged on the friction plate, and the friction plate inner hole spline is clamped with the external spline in a matching way.

Further, the first shaft body, the second shaft body and the base are welded and fixed.

Furthermore, a plurality of compression springs are uniformly distributed along the circumferential direction of the clutch main body, and a plurality of bolts and the compression springs are adopted to fix the bottom pressing plate, the friction plate, the middle pressing plate and the clutch main body.

Further, the number of the throwing claws is two, and the throwing claws are distributed in an annular array.

The swing claw type transmission shaft protector has the beneficial effects that after the transmission shaft rotates, under the action of centrifugal force, the swing claw is thrown out to be meshed with the swing claw internal teeth in the clutch main body to drive the whole clutch and the flywheel to rotate together, so that the whole machine is driven to enter an operation state, when the pickup bundling machine works under the serious blockage or clamping operation condition, the tractor engine transmission system rapidly and automatically reduces speed and increases torque through the system, and when the rotation speed is reduced to a certain rotation speed, the swing claw is rapidly separated from the swing claw internal teeth under the action of gravity, and the power is cut off, so that the protection of the pickup bundling machine transmission system and working parts is implemented;

The invention can effectively improve the operation efficiency of the pick-up bundling machine and the use reliability of the protector, and reduce the maintenance and use cost of the transmission shaft protector.

Drawings

FIG. 1 is a half cross-sectional view of a claw-type drive shaft protector provided by the invention;

FIG. 2 is a half cross-sectional view of a portion of the claw-flighted drive shaft protector of the present invention;

FIG. 3 is a partial cross-sectional view of a claw-type drive shaft protector provided by the invention;

FIG. 4 is a half cross-sectional view of the mounting of the yoke and the swing claw of the present invention;

fig. 5 is a partial cross-sectional view of the mounting of the yoke and the swing claw of the present invention.

In the figure, a clutch assembly base, a base 11, a first shaft body 12, a second shaft body 13, a clutch assembly 2, a clutch body 21, a bottom pressing plate 22, a friction plate 23, a middle pressing plate 24, a pressing spring 25, a 3-section fork 31, a second annular groove 32, internal teeth of a throwing claw, 4 throwing claws, 5 throwing claw shafts, 6 pin shafts, 7 first copper sleeves and 8 second copper sleeves are arranged.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

As shown in fig. 1-2, the invention provides a swing claw type transmission shaft protector, which comprises a clutch assembly base 1, a clutch assembly 2 arranged on the clutch assembly base 1, a yoke 3 and a swing claw 4;

the clutch assembly base 1 comprises a base 11 and a connecting shaft, wherein the connecting shaft is arranged on the base 11, the base 11 is fixedly connected with a flywheel of the pick-up bundling machine through bolts, the connecting shaft consists of a first shaft body 12 and a second shaft body 13, a first annular groove is formed between the first shaft body 12 and the second shaft body 13, and the inner diameter of the first annular groove is equal to the outer diameter of the first shaft body 12;

The clutch assembly 2 comprises a clutch main body 21, a bottom pressing plate 22, friction plates 23, a middle pressing plate 24 and a compression spring 25, wherein the clutch main body 21 is inserted in a first annular groove and forms a containing cavity with the second shaft body 13, the friction plates 23 are installed in the containing cavity, the friction plates 23 are provided with a plurality of friction plates 23 which are clamped with the second shaft body 13, the middle pressing plate 24 is arranged between the adjacent friction plates 23, the bottom pressing plate 22 is installed at the tail end of the containing cavity, bolts penetrate through the middle pressing plate 24 and the clutch main body 21, the compression spring 25 is sleeved on the bolts, and the bolts are screwed and fixed through nuts;

The upper end of the clutch main body 21 is provided with a mounting groove of the yoke 3, the first shaft body 12 protrudes out of the mounting groove and is coaxial with the yoke 3, a bearing is arranged between the yoke 3 and the first shaft body 12, the yoke 3 can rotate relative to the first shaft body 12, and a space is reserved between the yoke 3 and the clutch main body 21;

the second annular groove 31 is formed in the yoke 3, one or more of the throwing claws 4 are arranged in the second annular groove 31, the throwing claws 4 are connected with the yoke 3 through the throwing claw shafts 5, the throwing claws 4 are rotatable relative to the yoke 3, and the throwing claw inner teeth 32 matched with the throwing claws 4 are formed in the clutch main body 21.

On the basis of the embodiment, the device further comprises a pin shaft 6, and in order to prevent the swing claw shaft 5 from moving, the joint fork 3 and the swing claw shaft 5 are axially fixed by the pin shaft 6.

On the basis of the embodiment, the first shaft body 12 is sleeved with the first copper sleeve 7, the first copper sleeve 7 is arranged between the first shaft body 12 and the clutch main body 21 and is in interference press fit with the clutch main body 21, non-homogeneous abrasion is formed between the first shaft body 12 and the clutch main body 21, and the friction coefficient mu is less than or equal to 0.03.

On the basis of the embodiment, the first shaft body 12 is sleeved with the second copper sleeve 8, and the second copper sleeve 8 is arranged between the first shaft body 12 and the yoke 3 and is in interference press fit with the yoke 3.

On the basis of the above embodiment, the second shaft body 13 is provided with an external spline, the friction plate 23 is provided with a friction plate internal hole spline, and the friction plate internal hole spline is clamped with the external spline in a matching manner, so that the friction plate 23 and the base 11 rotate together.

On the basis of the above embodiment, the first shaft body 12 and the second shaft body 13 are welded and fixed with the base 11.

On the basis of the above embodiment, the plurality of compression springs 25 are uniformly distributed along the circumference of the clutch main body 21, and the bottom pressing plate 22, the friction plate 23, the middle pressing plate 24 and the clutch main body 21 are fixed by adopting a plurality of bolts and the compression springs 25 and are screwed up according to the transmission torque requirement.

On the basis of the above embodiment, the number of the throwing claws 4 is two and distributed in an annular array.

Technical principle:

According to the swing claw type transmission shaft protector, the clutch assembly base 1 is fixedly connected with a flywheel of a pickup bundling machine through bolts, and the joint fork 3 is connected with a cross joint shaft at one end of a transmission shaft. When the pick-up bundling machine works, power is transmitted to a transmission shaft through a power output shaft of a tractor, the drive joint fork 3 rotates and drives the throwing claw 4 to rotate, when the throwing claw 4 reaches a certain rotating speed, the throwing claw 4 is thrown out around the throwing claw shaft 5 under the action of centrifugal force and is meshed with the throwing claw inner teeth 32 above the clutch main body 21, the clutch assembly 2 is driven to rotate, the clutch assembly base 1 is driven to rotate through the connection of the inner hole spline of the friction plate 23 and the external spline on the second shaft body 13, and finally, the power is transmitted to a flywheel of the pick-up bundling machine, so that the pick-up bundling machine is driven to rotate, and the working state of the pick-up bundling machine is realized.

When the pick-up bundling machine works and slightly blocks the torque to increase the working condition, the pick-up bundling machine can be ensured to work normally by means of the torque transmission capacity value of the transmission shaft protector and the automatic regulation characteristic of high rotation speed and high torque of the tractor engine transmission system.

When the pick-up bundling machine works and the medium blocking torque increases the working condition, the middle pressure plate and the friction plate exceed the rated torque value and slip, so that the main body part and the base part of the pick-up bundling machine stop power transmission and overload protection is achieved.

When the pickup baler works under the serious blockage or blocking working condition, the tractor engine transmission system rapidly and automatically reduces speed and increases torque through the system, and when the rotating speed is reduced to a certain rotating speed, the throwing claw 4 is rapidly separated from the throwing claw inner teeth 32 under the action of gravity, and the power is cut off, so that the pickup baler transmission system and working parts are protected.

The basic principle, main features and advantages of the present invention are shown and described above, and the front, back, left and right are not specific, mainly for more intuitively explaining the technical solution, but not limiting. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention can be implemented by those skilled in the art without limiting the scope of the invention, therefore, all equivalent changes or modifications that are made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A pawl-type drive shaft protector, characterized in that: it includes a clutch assembly base (1), a clutch assembly (2) mounted on the clutch assembly base (1), a fork (3) and a pawl (4);

The clutch assembly base (1) includes a base (11) and a connecting shaft. The connecting shaft is mounted on the base (11). The base (11) is fixedly connected to the flywheel of the pickup and baler by bolts. The connecting shaft is composed of a first shaft body (12) and a second shaft body (13). A first annular groove is formed between the first shaft body (12) and the second shaft body (13).

The clutch assembly (2) includes a clutch body (21), a bottom pressure plate (22), friction plates (23), an intermediate pressure plate (24), and a clamping spring (25). The clutch body (21) is inserted into a first annular groove and forms a receiving cavity with the second shaft (13). Friction plates (23) are installed in the receiving cavity. Several friction plates (23) are provided. The friction plates (23) are snapped with the second shaft (13). An intermediate pressure plate (24) is arranged between adjacent friction plates (23). A bottom pressure plate (22) is installed at the end of the receiving cavity. A bolt is passed through the bottom pressure plate (22). The bolt passes through the intermediate pressure plate (24) and the clutch body (21), and a clamping spring (25) is sleeved on it and fixed by screwing on a nut.

The upper end of the clutch body (21) is provided with a mounting groove for the fork (3). The first shaft (12) protrudes from the mounting groove and is coaxial with the fork (3). The fork (3) is rotatable relative to the first shaft (12). There is a gap between the fork (3) and the clutch body (21).

The fork (3) is provided with a second annular groove (31), and one or more of the pawls (4) are provided in the second annular groove (31). The pawls (4) are connected to the fork (3) through the pawl shaft (5). The pawls (4) are rotatable relative to the fork (3). The clutch body (21) is provided with pawl internal teeth (32) that cooperate with the pawls (4).

2. The claw-type transmission shaft protector according to claim 1, characterized in that: it further includes a pin (6), and the fork (3) and the claw shaft (5) are axially fixed by the pin (6).

3. A claw-type transmission shaft protector according to claim 1, characterized in that: a first copper sleeve (7) is sleeved on the first shaft (12), the first copper sleeve (7) is disposed between the first shaft (12) and the clutch body (21), and is press-fitted with the clutch body (21), forming heterogeneous wear between the first shaft (12) and the clutch body (21), and the friction coefficient μ≤0.03.

4. A claw-type transmission shaft protector according to claim 1, characterized in that: a second copper sleeve (8) is sleeved on the first shaft body (12), the second copper sleeve (8) is disposed between the first shaft body (12) and the fork (3), and is press-fitted with the fork (3).

5. A claw-type transmission shaft protector according to claim 1, characterized in that: an external spline is provided on the second shaft body (13), and an internal spline is provided on the friction plate (23), wherein the internal spline of the friction plate and the external spline are engaged and locked together.

6. A claw-type transmission shaft protector according to claim 1, characterized in that: the first shaft (12), the second shaft (13) are welded and fixed to the base (11).

7. A claw-type transmission shaft protector according to claim 1, characterized in that: a plurality of clamping springs (25) are evenly distributed along the circumference of the clutch body (21), and a plurality of bolts and clamping springs (25) are used to fix the bottom pressure plate (22), friction plate (23), intermediate pressure plate (24) and clutch body (21).

8. A claw-type drive shaft protector according to claim 1, characterized in that: the number of claws (4) is two, and they are distributed in a ring array.