CN217977250U

CN217977250U - Impact-resistant PTO transmission shaft assembly

Info

Publication number: CN217977250U
Application number: CN202221675897.4U
Authority: CN
Inventors: 赵国柱
Original assignee: S&j Driveshaft Hangzhou Co ltd
Current assignee: S&j Driveshaft Hangzhou Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-12-06
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses a PTO transmission shaft assembly of protecting against shock, include the transmission shaft as the main part, the transmission shaft including the inner shaft tube that is used for transmitting power, inner shaft tube periphery cover be equipped with the outer spool that is used for protecting the inner shaft tube, inner shaft tube and outer spool leave the buffer zone that is used for protecting the inner shaft tube between, the one end of inner shaft tube be equipped with the input connection spare of being connected with the power supply transmission, the other end of inner shaft tube be equipped with the output connection spare of being connected with the load transmission. The utility model overcomes the problem of noise abnormal sound and violent vibration easily appear in the traditional agricultural machinery transmission system during operation that exists among the prior art. The utility model has the advantages of long service life, high stability, low noise and the like.

Description

Impact-proof PTO transmission shaft assembly

Technical Field

The utility model relates to a transmission shaft transmission structure field, more specifically say, relate to a PTO transmission shaft assembly of protecting against shock.

Background

The transmission shaft with the overload protection function can be frequently applied to an agricultural machine transmission system, when the transmitted torque exceeds the rated torque of an overload transmission shaft device, a power source can be separated and disconnected, the damage of agricultural machine equipment is avoided, when the overload transmission shaft device is internally provided with a pin separation structure, instantaneous reverse impact force can be generated during separation work, the impact force even exceeds the rated torque of the overload transmission shaft device, the impact force is concentrated and reflected on a middle telescopic shaft tube and an equipment connecting end gear transfer case, destructive impact is certainly generated during circulating damage, and noise abnormal sound and severe vibration can be brought along with the impact force.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the problem that noise abnormal sound and violent vibration easily appear in traditional agricultural machinery transmission system during operation that exists among the prior art, now provide the PTO transmission shaft assembly who has the little, the light protecting against shock of vibration of noise.

The utility model discloses a PTO transmission shaft assembly of protecting against shock, include the transmission shaft as the main part, the transmission shaft including the interior central siphon that is used for transmitting power, interior central siphon periphery cover be equipped with the outer central siphon that is used for protecting interior central siphon, interior central siphon and outer central siphon leave the buffer zone that is used for protecting interior central siphon within a definite time, the one end of interior central siphon be equipped with the input connection spare of being connected with the power supply transmission, the other end of interior central siphon be equipped with the output connection spare of being connected with the load transmission.

Buffer area can release the pressure that the contact produced between transmission shaft during operation interior central siphon and the outer central siphon effectively to the protection interior central siphon, the extension the utility model discloses a life.

Preferably, the right end of the input connecting piece is provided with an input pawl clamped with the left end of the inner shaft tube, the left end of the input connecting piece is provided with an input slot for inserting an output shaft of a power source, and the left end of the inner shaft tube is provided with an input pawl slot matched with the input pawl.

Preferably, the output connecting piece comprises an outer shell, an output pawl clamped with the right end of the inner shaft tube is arranged at the left end of the outer shell, an output connecting shaft connected with the output end of the load in an inserting mode is arranged at the right end of the outer shell, a spring separating mechanism used for protecting the load and the transmission shaft is arranged in the outer shell, and an output pawl groove matched with the output pawl is formed in the right end of the inner shaft tube.

Preferably, the center of the spring separation mechanism is radially provided with a telescopic shaft tube, the center of the telescopic shaft tube is provided with a stopping push sheet, the telescopic shaft tubes on the left side and the right side of the stopping push sheet are respectively provided with a separation push block matched with the stopping push sheet, and the back of the separation push block is provided with a ratchet pin for driving the separation push block.

Preferably, the inner wall of the outer shell is provided with 4 uniformly distributed gear pin grooves matched with the pin heads of the ratchet pins.

Preferably, the stopping push piece is arranged on the separating push piece at the left end of the inner wall of the telescopic shaft tube, the right end of the separating push piece is provided with a transmission push piece matched with the separating push piece for use, and a return spring is arranged between the separating push piece and the inner wall of the telescopic shaft tube.

When the transmission shaft normally transmits power torque, the pin head of the ratchet pin is clamped in the tooth pin groove of the outer sleeve shell and is in a locked state, the stopping push sheet of the spring separating mechanism is not pushed open and is in a combined state, and the transmission shaft normally transmits power to a load.

When the load torque exceeds the overload protection torque of the transmission shaft, the ratchet pin starts to slowly move radially under the action of the acting force, the stopping push sheet of the spring separating mechanism is pushed to separate, then the pin head of the ratchet pin slides out of the ratchet pin groove, and the power transmission of the transmission shaft starts to be disconnected.

When the ratchet pin is about to slide to the next tooth pin groove, the ratchet pin can be inertially bounced into the tooth pin groove due to the high-speed running of the transmission shaft, and is in a combined state, and the transmission shaft normally transmits power to a load.

The utility model discloses following beneficial effect has: long service life, high stability and low noise.

Drawings

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

Fig. 2 is a schematic view of the longitudinal section structure of the transmission shaft of the present invention.

Fig. 3 is a schematic diagram of the transmission shaft of the present invention during normal power transmission.

Fig. 4 is a schematic diagram of the transmission shaft of the present invention when power transmission is cut off.

Fig. 5 is a schematic view of the stopping push piece of the present invention not being pushed open.

Fig. 6 is a schematic view of the stopping pushing piece of the present invention being pushed open.

Inner shaft tube 1, outer shaft tube 2, buffer 3, input connecting piece 4, output connecting piece 5, input pawl 6, input claw groove 7, shell body 8, output pawl 9, output connecting axle 10, output claw groove 11, telescopic shaft tube 12, stop push jack 13, separation push block 14, ratchet pin 15, tooth round pin groove 16, separation push jack 17, transmission push jack 18, reset spring 19.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

The embodiment is as follows: the impact-proof PTO drive shaft assembly of the present embodiment is further described with reference to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, and includes a drive shaft as a main body, the drive shaft includes an inner shaft tube 1 for transmitting power, an outer shaft tube 2 for protecting the inner shaft tube 1 is sleeved on the periphery of the inner shaft tube 1, a buffer area 3 for protecting the inner shaft tube 1 is left between the inner shaft tube 1 and the outer shaft tube 2, an input connecting member 4 in transmission connection with a power source is disposed at one end of the inner shaft tube 1, and an output connecting member 5 in transmission connection with a load is disposed at the other end of the inner shaft tube 1.

The right end of the input connecting piece 4 is provided with an input pawl 6 clamped with the left end of the inner shaft tube 1, the left end of the input connecting piece 4 is provided with an input slot for inserting an output shaft of a power source, and the left end of the inner shaft tube 1 is provided with an input pawl slot 7 matched with the input pawl 6.

Output connecting piece 5 include

shell body

8, 8 left ends of shell body be equipped with the output pawl 9 of 1 right-hand member joint of inner tube, 8 right-hand members of shell body be equipped with the output connecting axle 10 of pegging graft mutually with the output of load, shell body 8 in be equipped with the spring separating mechanism who is used for protecting load and transmission shaft, 1 right-hand member of inner tube open and have with output pawl 9 assorted output claw groove 11.

The spring separation mechanism is characterized in that a telescopic shaft tube 12 is radially arranged at the center of the spring separation mechanism, a stopping push sheet 13 is arranged at the center of the telescopic shaft tube 12, separation push blocks 14 matched with the stopping push sheet 13 are respectively arranged in the telescopic shaft tubes 12 at the left side and the right side of the stopping push sheet 13, and ratchet pins 15 used for driving the separation push blocks 14 are arranged at the back of the separation push blocks 14.

The inner wall of the outer shell 8 is provided with 4 evenly distributed tooth pin grooves 16 matched with the pin heads of the ratchet pins 15.

The stopping push sheet 13 comprises a separating push sheet 17 arranged at the left end of the inner wall of the telescopic shaft tube 12, a transmission push sheet 18 matched with the separating push sheet 17 is arranged at the right end of the separating push sheet 17, and a return spring 19 is arranged between the separating push sheet 17 and the inner wall of the telescopic shaft tube 12.

The above description is only for the specific embodiments of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications made by those skilled in the art in the field of the present invention are all covered by the claims of the present invention.

Claims

1. The utility model provides a PTO transmission shaft assembly of protecting against shock, includes the transmission shaft as the main part, characterized by, the transmission shaft including the interior spool (1) that is used for transmitting power, interior spool (1) peripheral cover be equipped with outer spool (2) that are used for protecting interior spool (1), interior spool (1) and outer spool (2) between leave buffer (3) that are used for protecting interior spool (1), the one end of interior spool (1) be equipped with input connection spare (4) of being connected with the power supply transmission, the other end of interior spool (1) be equipped with output connection spare (5) of being connected with the load transmission.

2. An impact-proof PTO transmission shaft assembly according to claim 1, wherein the right end of the input connecting member (4) is provided with an input pawl (6) which is clamped with the left end of the inner shaft tube (1), the left end of the input connecting member (4) is provided with an input slot for inserting an output shaft of a power source, and the left end of the inner shaft tube (1) is provided with an input pawl slot (7) which is matched with the input pawl (6).

3. An impact-proof PTO transmission shaft assembly according to claim 1, wherein the output connecting member (5) comprises an outer casing (8), the left end of the outer casing (8) is provided with an output pawl (9) which is clamped with the right end of the inner shaft tube (1), the right end of the outer casing (8) is provided with an output connecting shaft (10) which is connected with the output end of a load in an inserting manner, the outer casing (8) is internally provided with a spring separating mechanism for protecting the load and the transmission shaft, and the right end of the inner shaft tube (1) is provided with an output pawl groove (11) which is matched with the output pawl (9).

4. An impact-proof PTO transmission shaft assembly according to claim 3, wherein a telescopic shaft tube (12) is radially arranged at the center of the spring separation mechanism, a stopping push plate (13) is arranged at the center of the telescopic shaft tube (12), separation push blocks (14) matched with the stopping push plate (13) are respectively arranged in the telescopic shaft tubes (12) at the left side and the right side of the stopping push plate (13), and ratchet pins (15) for driving the separation push blocks (14) are arranged at the back of the separation push blocks (14).

5. An impact resistant PTO drive shaft assembly according to claim 4, wherein the inner wall of the outer housing (8) is provided with 4 evenly distributed gear pin grooves (16) matching the pin heads of the ratchet pins (15).

6. An impact-resistant PTO transmission shaft assembly as claimed in claim 4, wherein the thrust stopping piece (13) comprises a separation thrust piece (17) provided at the left end of the inner wall of the telescopic shaft tube (12), a transmission thrust piece (18) used in cooperation with the separation thrust piece (17) is provided at the right end of the separation thrust piece (17), and a return spring (19) is provided between the separation thrust piece (17) and the inner wall of the telescopic shaft tube (12).