CN213838539U

CN213838539U - Buffer device

Info

Publication number: CN213838539U
Application number: CN202022683789.9U
Authority: CN
Inventors: 牛国宾; 李桥
Original assignee: Shijiazhuang Hongqiao Machinery Manufacturing Co ltd
Current assignee: Shijiazhuang Hongqiao Machinery Manufacturing Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-07-30
Anticipated expiration: 2030-11-19

Abstract

The application relates to the field of accessories of rotary drilling rigs of down-the-hole hammers, in particular to a buffer, which comprises a first shell and a second shell which are fixedly connected, wherein one end of the second shell, which is far away from the first shell, is opened, an output shaft connecting sleeve is connected in the second shell in a sliding manner, an air pipe is connected in the output shaft connecting sleeve in a sliding manner, and one end, which is positioned on the outer side of the second shell, of the output shaft connecting sleeve is connected with a drilling tool; one end of the output shaft connecting sleeve, which is close to the first shell, is provided with a containing groove, a buffer spring is sleeved outside the air pipe, one end of the buffer spring is arranged in the containing groove, and the other end of the buffer spring is fixedly connected with the inner side of the side wall of the second shell, which is close to the first shell; when the output shaft connecting sleeve is farthest away from the shell, the buffer spring is in a natural state. This application has the life's of improve equipment effect.

Description

Buffer device

Technical Field

The application relates to the field of accessories of rotary drilling rigs of down-the-hole hammers, in particular to a buffer.

Background

At present, the traditional construction method of the down-the-hole hammer rock-entering construction is positive circulation drilling, an air compressor drives compressed gas to enter a down-the-hole hammer through an air inlet channel on a drill rod, the gas drives the down-the-hole hammer to drill, waste gas is discharged from an exhaust hole of the down-the-hole hammer, and the waste gas simultaneously carries rock debris and is discharged to the ground surface from the hole wall and an annular gap on the outer wall of the drill rod together, so that the positive circulation drilling is formed.

However, the drill rods are subjected to significant axial loading forces and torques as the drill rig drills into hard rock, which can cause severe vibration of the machine and thereby affect the useful life of the machine.

In view of the above-mentioned related art, the inventor believes that there is a drawback that excessive vibration may reduce the service life of the machine.

SUMMERY OF THE UTILITY MODEL

In order to improve the service life of the equipment, the application provides a buffer.

The buffer provided by the application adopts the following technical scheme:

a buffer comprises a first shell and a second shell which are fixedly connected, wherein one end of the second shell, which is far away from the first shell, is opened, an output shaft connecting sleeve is connected in the second shell in a sliding mode, an air pipe is connected in the output shaft connecting sleeve in a sliding mode, and one end, which is located on the outer side of the second shell, of the output shaft connecting sleeve is connected with a drilling tool; one end of the output shaft connecting sleeve, which is close to the first shell, is provided with a containing groove, a buffer spring is sleeved outside the air pipe, one end of the buffer spring is arranged in the containing groove, and the other end of the buffer spring is fixedly connected with the inner side of the side wall of the second shell, which is close to the first shell; when the output shaft connecting sleeve is farthest away from the shell, the spring is in a natural state.

Through adopting above-mentioned technical scheme, when the drilling tool that the output shaft adapter sleeve is connected changes the hole, axial load is used in buffer and trachea, and the output shaft adapter sleeve slides and compress spring to casing two this moment for the loading force who is used in on the trachea reduces, has also reduced the loading force that the drilling tool transmitted other equipment simultaneously, has reduced the influence of loading force to other equipment, has strengthened the life of equipment.

Optionally, a guide groove is formed in the inner wall of the second shell, a guide strip plate is arranged on the outer wall of the output shaft connecting sleeve, and the guide strip plate can be matched with the guide groove to enable the output shaft connecting sleeve to be close to or far away from the first shell along the guide groove.

By adopting the technical scheme, the output shaft connecting sleeve slides by the sliding fit of the fixed guide strip plate and the guide groove, so that the probability that the output shaft connecting sleeve rotates under the influence of torque when sliding is reduced, and the stability of the output shaft connecting sleeve when sliding is enhanced.

Optionally, the accommodating groove is communicated with an inner cavity of the output shaft connecting sleeve, a first blocking ring is sleeved on the outer wall of the air pipe arranged in the accommodating groove and abuts against the end wall of the accommodating groove, and the first blocking ring is fixedly connected with one end, located in the accommodating groove, of the spring.

Through adopting above-mentioned technical scheme, first fender ring can restrict the one end of buffer spring and get into the inner chamber of output shaft adapter sleeve, and the storage tank has increased the length of the buffer spring that can place in casing two simultaneously for the loading capacity that the buffer spring who places in casing two can cushion increases, has promoted the shock-absorbing capacity of buffer.

Optionally, the inner cavity of the output shaft connecting sleeve is provided with a composite bearing sleeve, an outer ring of the composite bearing sleeve is in interference fit with the inner cavity of the output shaft connecting sleeve, and the air pipe is in sliding fit with an inner ring of the composite bearing sleeve.

Through adopting above-mentioned technical scheme, compound bearing housing and trachea sliding fit make output shaft connecting sleeve can follow the trachea and slide to casing two when receiving the loading force, and compound bearing housing and tracheal cooperation are stable, have strengthened the stability of buffer.

Optionally, a snap ring with a diameter larger than the outer diameter of the air pipe is arranged at one end of the air pipe in the first shell, a second retaining ring is sleeved on the outer wall of the air pipe, and the second retaining ring abuts against the outer wall of the second shell on one side close to the first shell; a first sealing ring is arranged between the second baffle ring and the clamping ring, and the first sealing ring is sleeved on the outer wall of the air pipe.

Through adopting above-mentioned technical scheme, first sealing washer is located and is kept off between ring and the snap ring, can restrict first sealing washer and drop on the trachea outer wall, has strengthened the stability of first sealing washer.

Optionally, a second sealing ring is arranged at a communication position of the accommodating groove and the inner cavity of the output shaft connecting sleeve, and the second sealing ring is sleeved on the outer wall of the air pipe.

Through adopting above-mentioned technical scheme, the second sealing washer can reduce the inner chamber of two inner chambers of casing and output shaft adapter sleeve and seal, has reduced revealing of gaseous in the casing two, has reduced during outside air gets into casing two simultaneously, has strengthened the stability of buffer.

Optionally, one end of the first shell, which is far away from the second shell, is provided with a rolling bearing, the outer gas pipe is in interference fit with an inner ring of the rolling bearing, the end of the outer gas pipe is abutted to one end face of the gas pipe, which is provided with a snap ring, one end of the outer gas pipe, which is located in the first shell, is provided with a sealing element, and the outer diameter of the sealing ring is larger than the inner diameter of the rolling bearing.

Through adopting above-mentioned technical scheme, when outside gas-supply pipe carries out the gas transmission to the trachea, the sealing member can reduce the probability that gas passes through the clearance of rolling bearing department and reveals, has strengthened the sealing performance in the casing one, can make a casing internal pressure remain stable.

Optionally, the first sealing ring and the second sealing ring are both V-shaped combined sealing rings.

Through adopting above-mentioned technical scheme, the single-phase sealing performance of V type combination sealing washer is good, and under the operating mode that has impact load, the stability of V type combination sealing washer is better, has improved tracheal sealing performance in the buffer.

Optionally, the rotary bearing is a tapered roller bearing.

Through adopting above-mentioned technical scheme, tapered roller bearing can bear radial load and unidirectional axial load and bearing capacity is big, and this makes tapered roller bearing can do the buffering to the radial loading power that is used in on the trachea, has reduced the influence of loading power to equipment, has promoted the practicality of buffer.

Optionally, the output shaft connecting sleeve is sleeved with a cover plate, and the cover plate is detachably connected with one side of the opening of the second shell.

Through adopting above-mentioned technical scheme, the apron can seal the opening of casing two through the apron, reduces in debris get into casing two, and the connection can be dismantled to the apron simultaneously, is convenient for install and dismantle the output shaft adapter sleeve, has made things convenient for workman's operation.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the drilling tool connected with the output shaft connecting sleeve rotates the hole, the axial load acts on the buffer and the air pipe, and the output shaft connecting sleeve slides towards the second shell and compresses the spring, so that the load force acting on the air pipe is reduced, the load force transmitted to other equipment by the drilling tool is reduced, the influence of the load force on other equipment is reduced, and the service life of the equipment is prolonged;

the single-phase sealing performance of the V-shaped combined sealing ring is good, and under the working condition of impact load, the stability of the V-shaped combined sealing ring is better, so that the sealing performance of an air pipe in the buffer is improved;

3. the cover plate can seal the opening of the second shell through the cover plate, sundries are reduced to enter the second shell, the cover plate can be detachably connected, the output shaft connecting sleeve is convenient to install and detach, and operation of workers is facilitated.

Drawings

FIG. 1 is a cross-sectional view of a bumper.

Description of reference numerals: 1. a first shell; 11. a rotating bearing; 12. a first seal ring; 13. a second retainer ring; 14. a seal member; 2. a second shell; 21. a guide groove; 22. a buffer spring; 23. a cover plate; 3. an output shaft connecting sleeve; 31. a containing groove; 32. a first retainer ring; 33. a second seal ring; 34. fixing grooves; 35. a guide slat; 36. compounding a bearing sleeve; 4. an air tube; 41. a snap ring.

Detailed Description

The present application is described in further detail below with reference to fig. 1.

The embodiment of the application discloses a buffer, refer to fig. 1, it includes casing one 1 and casing two 2, casing one 1 and casing two 2 edge welded connection, casing two 2 deviates from the one end opening of casing one 1, and opening one side sliding connection of casing two 2 has output shaft adapter sleeve 3, and the drilling tool is connected to the one end that output shaft adapter sleeve 3 is located the casing two 2 outsides.

Referring to fig. 1, an air pipe 4 coaxial with the output shaft connecting sleeve 3 is slidably connected in the output shaft connecting sleeve 3, an accommodating groove 31 coaxial with the output shaft connecting sleeve 3 is formed in one side of the output shaft connecting sleeve 3, which is located in the second casing 2, and the diameter of the accommodating groove 31 is larger than that of the air pipe 4. The air pipe 4 is sleeved with a buffer spring 22, one end of the buffer spring 22 is arranged in the accommodating groove 31, the other end of the buffer spring 22 abuts against the inner side, close to the first shell 1, of the second shell 2, the air pipe 4 penetrates through the side wall of the second shell 2, and one end of the air pipe 4 is located in the first shell 1; when the output shaft connecting sleeve 3 is farthest away from the first casing 1, the buffer spring 22 is in a natural state. The inboard welding of the lateral wall that casing one 1 deviates from casing two 2 has rolling bearing 11 coaxial with trachea 4, rolling bearing 11's outer lane and the 4 interference fit of outside gas-supply pipe, and the one end conflict trachea 4's of outside gas-supply pipe position in casing one 1 port. When the external gas pipe inputs compressed gas into the gas pipe 4 to drive the drilling tool to drill, the drilling tool transmits the axial load force to the output shaft connecting sleeve 3, the output shaft connecting sleeve 3 can slide in the second shell 2 to compress the buffer spring 22, the buffer spring 22 can buffer the load force, the influence of the load force on equipment is reduced, and the service life of the equipment is prolonged.

Referring to fig. 1, a cover plate 23 is arranged on one side of the opening of the second housing 2, and the cover plate 23 is sleeved on the output shaft connecting sleeve 3 and is connected with the end face flange of the second housing 2.

Referring to fig. 1, a first baffle ring is disposed in the accommodating groove 31, the first baffle ring is sleeved on the outer wall of the air tube 4, the first baffle ring is abutted against the end wall of the accommodating groove 31, one end of the buffer spring 22 located in the accommodating groove 31 is abutted against the first baffle ring, and the other end of the spring is abutted against the inner side of the side wall of the second casing 2 close to the first casing 1. The inner cavity of the output shaft connecting sleeve 3 is provided with a fixing groove 34, a second sealing ring 33 is bonded in the groove of the fixing groove 34, and the inner ring of the second sealing ring 33 is matched with the air pipe 4. The first baffle ring 32 can limit one end of the buffer spring 22 from entering the inner cavity of the output shaft connecting sleeve 3, and the second sealing ring 33 can seal the inner part of the second shell 2 and the inner cavity of the output shaft connecting sleeve 3.

Referring to fig. 1, a guide groove 21 is arranged on the inner wall of the second shell 2, the guide groove 21 is arranged parallel to the air pipe 4, and one end of the guide groove 21 close to the first shell 1 is sealed; the guide grooves 21 are provided with two groups and are symmetrical relative to the air pipe 4, the outer wall of the output shaft connecting sleeve 3 is provided with two groups of guide strips 35, the two groups of guide strips 35 are symmetrical relative to the axial lead of the output shaft connecting sleeve 3, and the guide strips 35 can be in sliding fit with the guide grooves 21 so that the output shaft connecting sleeve 3 can be close to or far away from the shell 1 along the guide grooves 21 and the buffer springs 22 can be compressed or released.

Referring to fig. 1, the inner cavity of the output shaft connecting sleeve 3 is provided with a composite bearing sleeve 36, the outer ring of the composite bearing sleeve 36 is in interference fit with the inner cavity of the output shaft connecting sleeve 3, and the inner ring of the composite bearing sleeve 36 is in sliding fit with the air pipe 4, so that the output shaft connecting sleeve 3 can slide along the air pipe 4.

Referring to fig. 1, a snap ring 41 integrally formed with the air pipe 4 is arranged at one end of the air pipe 4 in the housing 1, and the diameter of the snap ring 41 is larger than the outer diameter of the air pipe 4; a second gear ring 13 is further sleeved on the outer wall of the air pipe 4, the inner ring of the second gear ring 13 is in interference fit with the air pipe 4, and one side of the second gear ring 13 abuts against the outer side wall of the second shell 2; a first sealing ring 12 is arranged between the second gear ring 13 and the clamping ring 41, and the inner ring of the first sealing ring 12 is in interference fit with the air pipe 4; the first seal ring 12 and the second seal ring 33 are both V-shaped combined seal rings. The first sealing ring 12 seals the communication position between the air pipe 4 and the side wall of the second housing 2 between the first housing 1 and the second housing 2, and the first sealing ring 12 is arranged between the snap ring 41 and the second retaining ring, so that the first sealing ring 12 is kept stable on the air pipe 4.

Referring to fig. 1, the rotary bearing 11 is a tapered roller bearing. One end of the external gas pipe, which is positioned in the shell I1, is sleeved with a sealing element 14, the sealing element 14 is a Y-shaped rubber sealing ring, the diameter of the sealing element 14 is larger than the inner diameter of the rotating bearing 11, and the two sealing elements 14 are coaxially opposite; when compressed gas is input into the port at the end, located in the first shell 1, of the external gas pipe, abutting against the end, provided with the clamping ring 41, of the gas pipe 4, the Y-shaped rubber sealing ring can reduce the probability of leakage of the compressed gas through a gap between the bearing and the side wall of the first shell 1, and therefore the first shell 1 is kept in a sealing state.

The implementation principle of the buffer in the embodiment of the application is as follows: when the buffer works, the inner ring of the rotating bearing 11 is matched with the external gas pipe 4, so that the end head of the external gas pipe props against the end head of the gas pipe 4 to input compressed gas into the gas pipe 4, the compressed gas enters the output shaft connecting sleeve 3 through the gas pipe 4 to drive a drilling tool to drill a hole, the drilling tool transmits load force and torque to the buffer during drilling, the load force pushes the output shaft connecting sleeve 3 to slide towards the direction close to the shell 1 along the guide groove 21, meanwhile, the output shaft connecting sleeve 3 also slides relative to the gas pipe 4, so that the output shaft connecting sleeve 3 compresses the buffer spring 22, and the buffer spring 22 can buffer the load force to reduce the load force transmitted to other equipment by the buffer; the load force on the air pipe 4 can also act on the rotating bearing 11, the rotating bearing 11 is a tapered roller bearing, and the tapered roller bearing can also play a role in buffering and dispersing the axial load force and reduce the effect of the load force on the buffer.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A buffer comprises a first shell (1) and a second shell (2) which are fixedly connected, wherein one end, far away from the first shell (1), of the second shell (2) is opened, an output shaft connecting sleeve (3) is connected in the second shell (2) in a sliding mode, an air pipe (4) is connected in the output shaft connecting sleeve (3) in a sliding mode, and one end, located on the outer side of the second shell (2), of the output shaft connecting sleeve (3) is connected with a drilling tool; the method is characterized in that: an accommodating groove (31) is formed in one end, close to the first shell (1), of the output shaft connecting sleeve (3), a buffer spring (22) is sleeved outside the air pipe (4), one end of the buffer spring (22) is arranged in the accommodating groove (31), and the other end of the buffer spring (22) is fixedly connected with the inner side of the side wall, close to the first shell (1), of the second shell (2); when the output shaft connecting sleeve (3) is farthest away from the first shell (1), the buffer spring (22) is in a natural state.

2. A buffer according to claim 1, wherein: be equipped with guide way (21) on the inner wall of casing two (2), be equipped with direction slat (35) on the outer wall of output shaft adapter sleeve (3), direction slat (35) can make output shaft adapter sleeve (3) be close to or keep away from casing (1) along guide way (21) with guide way (21) cooperation.

3. A buffer according to claim 1, wherein: the inner cavity of the accommodating groove (31) is communicated with the inner cavity of the output shaft connecting sleeve (3), the outer wall of the air pipe (4) arranged in the accommodating groove (31) is sleeved with a first blocking ring (32), the first blocking ring (32) is abutted against the end wall of the accommodating groove (31), and the first blocking ring (32) is fixedly connected with one end of the spring located in the accommodating groove (31).

4. A buffer according to claim 1, wherein: the inner cavity of the output shaft connecting sleeve (3) is provided with a composite bearing sleeve (36), the outer ring of the composite bearing sleeve (36) is in interference fit with the inner cavity of the output shaft connecting sleeve (3), and the air pipe (4) is in sliding fit with the inner ring of the composite bearing sleeve (36).

5. A buffer according to claim 1, wherein: a clamping ring (41) with the diameter larger than the outer diameter of the air pipe (4) is arranged at one end of the air pipe (4) positioned in the first shell (1), a second retaining ring is sleeved on the outer wall of the air pipe (4) and abuts against the outer wall of the second shell (2) close to one side of the first shell (1); a first sealing ring (12) is arranged between the second baffle ring and the clamping ring (41), and the first sealing ring (12) is sleeved on the outer wall of the air pipe (4).

6. A buffer according to claim 5, wherein: a second sealing ring (33) is arranged at the communicating position of the accommodating groove (31) and the inner cavity of the output shaft connecting sleeve (3), and the second sealing ring (33) is sleeved on the outer wall of the air pipe (4).

7. A buffer according to claim 5, wherein: one end of the first shell (1) far away from the second shell (2) is provided with a rotating bearing (11), the outer gas pipe is in interference fit with the inner ring of the rotating bearing (11), the end of the outer gas pipe is inconsistent with one end face of the gas pipe (4) provided with a clamping ring (41), one end of the outer gas pipe, which is located in the first shell (1), is provided with a sealing element (14), and the outer diameter of the sealing element (14) is larger than the inner diameter of the rotating bearing (11).

8. A buffer according to claim 6, wherein: the first sealing ring (12) and the second sealing ring (33) are both V-shaped combined sealing rings.

9. A buffer according to claim 7, wherein: the rotating bearing (11) is a tapered roller bearing.

10. A buffer according to claim 1, wherein: the output shaft connecting sleeve (3) is sleeved with a cover plate (23), and the cover plate (23) is detachably connected with one side of an opening of the second shell (2).