Claw throwing type transmission shaft protector

Abstract

The invention provides a throwing claw type transmission shaft protector. The throwing claw type transmission shaft protector comprises a clutch assembly base, a clutch assembly installed on the clutch assembly base, a joint fork and a throwing claw. The clutch assembly base comprises a base body and a connecting shaft, the connecting shaft is installed on the base body, and a first annular groove is formed between the first shaft body and the second shaft body. The clutch assembly comprises a clutch body, a bottom pressing plate, a friction plate, a middle pressing plate and a compression spring, the clutch body is inserted into the first annular groove, the clutch body and the second shaft body form a containing cavity, and the friction plate is installed in the containing cavity and fixed through the compression spring; a mounting groove of a joint fork is formed in the upper end of the clutch body, a second annular groove is formed in the joint fork, a throwing claw is arranged in the second annular groove, and throwing claw inner teeth used in cooperation with the throwing claw are formed in the clutch body. Power can be automatically cut off, and a transmission system and working parts of the picking and bundling machine are protected.

Description

Technical Field

[0001] This invention belongs to the technical field of drive shaft protection devices, specifically relating to a claw-type drive shaft protector. Background Technology

[0002] Currently, drive shaft protectors used in agricultural machinery such as pickup balers in my country typically include friction plate type, cam type, and ball bearing type, with friction plate type being the most common. These protectors are usually calibrated to transmit maximum torque before leaving the factory using specialized calibration equipment. Because friction plate protectors transmit torque at the rated torque, overload protection relies on the sliding between the friction plates to limit the effective torque transmission. However, due to structural limitations, this type of protector cannot automatically cut off power when the pickup baler encounters blockage or jamming. Power continues to drive the equipment, causing the friction plate protector to continue operating, increasing friction, and ultimately leading to the burning and damage of the friction plates, affecting machine operation. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a claw-type drive shaft protector that can independently cut off power and protect the transmission system and working parts of the picking and baling machine.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A pawl-type drive shaft protector includes a clutch assembly base, a clutch assembly mounted on the clutch assembly base, a fork, and a pawl;

[0006] The clutch assembly base includes a base and a connecting shaft. The connecting shaft is mounted on the base. The base is fixedly connected to the flywheel of the pickup baler by bolts. The connecting shaft is composed of a first shaft and a second shaft. A first annular groove is formed between the first shaft and the second shaft.

[0007] The clutch assembly includes a clutch body, a bottom pressure plate, friction plates, an intermediate pressure plate, and a clamping spring. The clutch body is inserted into a first annular groove and forms a receiving cavity with a second shaft. Friction plates are installed in the receiving cavity, and a plurality of friction plates are arranged. The friction plates are engaged with the second shaft. An intermediate pressure plate is arranged between adjacent friction plates. A bottom pressure plate is installed at the end of the receiving cavity. A bolt passes through the bottom pressure plate, passes through the intermediate pressure plate and the clutch body, and a clamping spring is sleeved on it and fixed by screwing on a nut.

[0008] The upper end of the clutch body is provided with a mounting groove for the fork, the first shaft protrudes from the mounting groove and is coaxial with the fork, the fork is rotatable relative to the first shaft, and a gap is left between the fork and the clutch body;

[0009] The fork is provided with a second annular groove, and one or more of the pawls are provided in the second annular groove. The pawls are connected to the fork via pawl shafts, and the pawls are rotatable relative to the fork. The clutch body is provided with pawl internal teeth that cooperate with the pawls.

[0010] Furthermore, it also includes a pin, which is used to axially fix the fork and the pawl shaft.

[0011] Furthermore, a first copper sleeve is fitted onto the first shaft body. The first copper sleeve is disposed between the first shaft body and the clutch body and is press-fitted with the clutch body, resulting in heterogeneous wear between the first shaft body and the clutch body, and the friction coefficient μ≤0.03.

[0012] Furthermore, a second copper sleeve is fitted onto the first shaft body, the second copper sleeve being disposed between the first shaft body and the fork, and being press-fitted with the fork.

[0013] Furthermore, the second shaft is provided with an external spline, and the friction plate is provided with an internal spline, which engages with the external spline.

[0014] Furthermore, the first shaft and the second shaft are welded and fixed to the base.

[0015] Furthermore, several clamping springs are evenly distributed along the circumference of the clutch body, and the bottom pressure plate, friction plate, intermediate pressure plate and clutch body are fixed by several bolts and clamping springs.

[0016] Furthermore, the number of the pawls is two, and they are distributed in a circular array.

[0017] Beneficial effects: The present invention provides a claw-type drive shaft protector. After the drive shaft rotates, under the action of centrifugal force, the claw is thrown out and engages with the inner teeth of the claw in the clutch body, driving the entire clutch and flywheel to rotate together, driving the entire machine into the working state. When the pickup baler encounters severe blockage or jamming, the tractor engine transmission system quickly and automatically reduces speed and increases torque through the system. When the speed drops to a certain speed, the claw quickly disengages from the inner teeth of the claw under the action of gravity, cutting off the power and protecting the transmission system and working parts of the pickup baler.

[0018] This invention can effectively improve the operating efficiency of pick-up and baling machines and the reliability of the protector, while reducing the maintenance and usage costs of the drive shaft protector. Attached Figure Description

[0019] Figure 1 A half-sectional view of a claw-type drive shaft protector provided by the present invention;

[0020] Figure 2This is a half-sectional view of the claw-type drive shaft protector described in part of the present invention;

[0021] Figure 3 A partial sectional view of a claw-type drive shaft protector provided by the present invention;

[0022] Figure 4 This is a half-sectional view of the installation of the fork and pawl described in this invention;

[0023] Figure 5 This is a partial cross-sectional view of the installation of the fork and pawl described in this invention.

[0024] In the diagram: 1 Clutch assembly base, 11 Base, 12 First shaft, 13 Second shaft, 2 Clutch assembly, 21 Clutch body, 22 Bottom pressure plate, 23 Friction plate, 24 Middle pressure plate, 25 Pressure spring, 3 Fork, 31 Second annular groove, 32 Slinger internal tooth, 4 Slinger, 5 Slinger shaft, 6 Pin, 7 First copper sleeve, 8 Second copper sleeve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1-2 As shown, the present invention provides a pawl-type drive shaft protector, including a clutch assembly base 1, a clutch assembly 2 mounted on the clutch assembly base 1, a fork 3 and a pawl 4;

[0027] 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 inner diameter of the first annular groove is the same as the outer diameter of the first shaft body 12.

[0028] 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 arranged. The friction plates 23 are engaged with the second shaft 13. An intermediate pressure plate 24 is arranged between adjacent friction plates 23. The bottom pressure plate 22 is installed at the end of the receiving cavity. A bolt passes through the bottom pressure plate 22, 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.

[0029] 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. A bearing is installed between the fork 3 and the first shaft 12. The fork 3 can rotate relative to the first shaft 12. A gap is left between the fork 3 and the clutch body 21.

[0030] 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.

[0031] Based on the above embodiments, a pin 6 is also included. To prevent the claw shaft 5 from moving, the fork 3 and the claw shaft 5 are axially fixed by the pin 6.

[0032] Based on the above embodiment, 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. Non-homogeneous wear is formed between the first shaft 12 and the clutch body 21, and the friction coefficient μ≤0.03.

[0033] Based on the above embodiment, a second copper sleeve 8 is sleeved on the first shaft 12. The second copper sleeve 8 is disposed between the first shaft 12 and the fork 3, and is press-fitted with the fork 3.

[0034] Based on the above embodiments, the second shaft 13 is provided with an external spline, and the friction plate 23 is provided with an internal spline. The internal spline of the friction plate and the external spline are engaged to realize that the friction plate 23 and the base 11 rotate together.

[0035] Based on the above embodiments, the first shaft 12, the second shaft 13 and the base 11 are welded and fixed.

[0036] Based on the above embodiments, several compression springs 25 are evenly distributed around the circumference of the clutch body 21. Several bolts and compression springs 25 are used to fix the bottom pressure plate 22, friction plate 23, intermediate pressure plate 24 and clutch body 21 and tighten them according to the torque transmission requirements.

[0037] Based on the above embodiment, the number of the 4-clawed claws is two, and they are distributed in a circular array.

[0038] Technical principle:

[0039] The present invention relates to a claw-type drive shaft protector. The clutch assembly base 1 is bolted to the flywheel of the pickup baler, and the fork 3 is connected to the cross-shaped shaft at one end of the drive shaft. When the pickup baler is operating, power is transmitted to the drive shaft through the tractor's power take-off shaft, driving the fork 3 to rotate and causing the claw 4 to rotate. When the claw 4 reaches a certain speed, it is thrown out around the claw shaft 5 under the action of centrifugal force and engages with the claw internal teeth 32 above the clutch body 21, driving the clutch assembly 2 to rotate. Then, through the spline of the inner hole of the friction plate 23, it is connected to the external spline on the second shaft 13, driving the clutch assembly base 1 to rotate. Finally, the power is transmitted to the flywheel of the pickup baler, driving the pickup baler to rotate, thus realizing the working state of the pickup baler.

[0040] When the pickup baler encounters a slight blockage and increased torque during operation, the torque transmission capacity of the drive shaft protector and the automatic adjustment characteristics of the tractor engine transmission system with high speed and high torque can ensure the normal operation of the pickup baler.

[0041] When the pickup and baler encounters a moderate blockage and increased torque during operation, the pressure plate and friction plate will slip after exceeding the rated torque value, causing the main body and base to stop power transmission, thus providing overload protection.

[0042] When the pickup baler encounters severe blockage or jamming during operation, the tractor engine transmission system quickly and automatically reduces speed and increases torque. When the speed drops to a certain level, the claw 4 quickly disengages from the claw's internal teeth 32 under the action of gravity, cutting off power and protecting the pickup baler's transmission system and working parts.

[0043] This invention can effectively improve the operating efficiency of pick-up and baling machines and the reliability of the protector, while reducing the maintenance and usage costs of the drive shaft protector.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this invention. The terms "front," "back," "left," and "right" used in the text are not specific and are primarily for illustrating the technical solution more intuitively, and do not constitute a limitation. Those skilled in the art should understand that the above embodiments are only for illustrating the technical concept and characteristics of this invention, and are intended to enable those skilled in the art to understand and implement the content of this invention. They should not be used to limit the scope of protection of this invention. All equivalent changes or modifications made according to the spirit and essence of this invention should be covered within the scope of protection of this invention.

Claims

1. A claw-type drive shaft protector, characterized in that: 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 drive shaft protector according to claim 1, characterized in that: It also includes a pin (6), and the fork (3) and the claw shaft (5) are axially fixed by the pin (6).

3. The claw-type drive shaft protector according to claim 1, characterized in that: A first copper sleeve (7) is fitted onto the first shaft (12). The first copper sleeve (7) is located between the first shaft (12) and the clutch body (21) and is press-fitted with the clutch body (21). Non-homogeneous wear is formed between the first shaft (12) and the clutch body (21), and the friction coefficient μ≤0.

03.

4. The claw-type drive shaft protector according to claim 1, characterized in that: A second copper sleeve (8) is fitted onto the first shaft (12). The second copper sleeve (8) is located between the first shaft (12) and the fork (3) and is press-fitted with the fork (3).

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

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

7. A claw-type drive shaft protector according to claim 1, characterized in that: Several compression springs (25) are evenly distributed around the clutch body (21). Several bolts and compression 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 the claws (4) is two, and they are distributed in a circular array.

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