TWM618193U - Shock-absorbing reciprocating pneumatic tool - Google Patents

Abstract

A shock-absorbing reciprocating pneumatic tool, comprising an operating element connected to an air pressure source and operable to input air flow from the air source, a shock absorber connected to the operating element, a diversion seat, an impact element, and a connection A bearing seat under the guide seat, a return spring located directly under the striker, and a working piece. The present invention can raise the striking piece upward through the input airflow, and after moving to a certain height, it will fall to hit the work piece, so that the work piece can cut, chisel or break the building materials or other objects. , To achieve the effect of saving manpower, and when the impact member is dropped, the shock absorber can buffer vibration and impact, so that the user does not need to laboriously hold, and enhance the use experience.

Description

Shock-absorbing reciprocating pneumatic tools

The new model relates to a pneumatic tool, in particular to a shock-absorbing reciprocating pneumatic tool.

In general construction operations, columnar or rectangular building materials such as wood, PU materials, bamboo tubes or bricks are used. Due to size selection, environmental adaptability, waste disposal or other construction requirements, these building materials are often cut on site , Chiseling or interrupting, etc., to process building materials into suitable sizes. The conventional processing method is to abut the tip or sharp edge of a shovel (or other tool) against the building material, and then step on the shovel repeatedly with your feet, so that the shovel can continuously gouge the building materials through the continuous impact force, so as to achieve the goal. The required processing effect. However, this method is not only laborious, but also causes uneven force because the operator's foot can only hit one side of the shovel, resulting in uneven cut or insufficient force, and even due to slippage when the foot is tapped. Cause work safety accidents. In addition, this construction method will also cause the user to receive strong vibrations due to the reaction force when holding the shovel (or other tools), causing the user to have to handle it with difficulty, and will increase the inconvenience and discomfort in use.

Therefore, the purpose of the present invention is to provide a pneumatic tool that is easy to work and can reduce impact.

Therefore, the shock-absorbing reciprocating pneumatic tool of the present invention is used in conjunction with an air pressure source. The shock-absorbing reciprocating pneumatic tool includes an operating element connected to the air pressure source and operable to input air flow from the air source, and an operating element connected to the operating element The shock absorber, a diversion seat, a striker, a bearing seat connected under the diversion seat, a return spring directly under the striker, and a working piece.

The shock absorber includes an upper connecting piece connected to the operating piece at the top end and connected to the operating piece, a guide post connected to the upper connecting piece at the top end, a lower connecting piece set on the guide post, and a set at A buffer spring on the guide post and pushes the lower connecting piece upward to abut against the upper connecting piece. The lower connecting piece is limited by the guide post and can only slide between the upper connecting piece and the bottom end of the guide post in the up and down direction. When the lower connecting piece is far away from the upper connecting piece, the buffer spring is compressed.

The air deflector surrounds and defines at least one air flow channel communicating with the operating member through the shock absorber, an annular groove surrounding and communicating with the at least one air flow channel through the shock absorber, and a cavity communicating with the annular groove. The striker can be slid up and down in the chamber, and the chamber is divided into an inner space and an annular space that is not directly connected to the inner space and communicates with the ring groove. The striker defines At least one radial air passage which can communicate with the annular groove after being aligned with the annular groove, and an axial air passage which communicates with the at least one radial air passage and extends upwardly to communicate with the inner space of the cavity.

The supporting seat surrounds and defines a chamber for the striker to enter and accommodating the return spring, and an exhaust hole communicating with the chamber. The working piece includes a connecting shaft part through which the bearing seat and the return spring are inserted so that the top end extends in the containing chamber, and a characteristic part connected to the bottom end of the connecting shaft part. The connecting shaft is confined in the bearing seat so as to be movable up and down.

The effect of the present invention is that the user can control the operating element to input air flow from the air pressure source, and the air flow will sequentially pass through the air flow channel and the annular groove and then enter the annular space, and the air entering the annular space With continuous increase, the gas will push the striker and move the striker upward. When the striker rises until the at least one radial air passage is aligned with the annular groove, the gas accumulated in the annular space will pass through the striker. At least one radial air channel and the axial air channel enter the cavity space. Because the airflow has an outlet, the impact member is no longer pushed and falls down, and then impacts the connecting shaft of the working member, so that the characteristic part can be aligned. Cutting, chiseling or breaking of building materials or other objects can save manpower. When the striking part hits the working part, it will drive the lower connector of the shock absorber to move downward relative to the upper connector , And compress the buffer spring, thereby achieving the effect of reducing shock and vibration.

Referring to Figure 1, Figure 2, and Figure 3, an embodiment of the new type of shock-absorbing reciprocating pneumatic tool includes an operating member 1 for the user to hold and operate, a shock absorber 2 connected to the bottom end of the operating member 1 , A deflector seat 3 connected to the bottom end of the shock absorber 2, a bearing seat 4 connected below the deflector seat 3, a striker 5 arranged in the deflector seat 3 and the bearing seat 4, a A return spring 6 arranged in the bearing 4 and directly below the striker 5, and a working piece 7 inserted on the bearing 4 from bottom to top. The operating member 1 includes a handle 11 that surrounds and defines an air duct 111 communicating with an air pressure source (not shown), a pressure rod 12 arranged on the handle 11 and for the user to press, and a connection and An air pipe 13 connected to the air flow pipe 111 and extending downward. The shock absorber 2 includes an upper connecting piece 21 with a top end locked at the bottom end of the air pipe 13 and connected to the air pipe 13, a top end screw-locked guide post 22 at the bottom end of the upper connecting piece 21, and a set at the bottom of the upper connecting piece 21. The guide post 22 and the bottom end are locked on the lower connecting piece 23 of the top end of the diversion seat 3, a plurality of balls 24 arranged on the lower connecting piece 23 and in rolling contact with the guide post 22, and a plurality of locks are arranged on the lower connecting piece 23. The positioning member 25 on the connecting member 23 and the buffer spring 26 set on the guide post 22 and pushing the lower connecting member 23 upward against the upper connecting member 21.

1, 2, and 4, the guide post 22 has a shaft tube portion 221 whose top end is locked on the upper connecting member 21, and a bottom end connected to the shaft tube portion 221 and an outer diameter larger than the shaft tube portion 221's limit portion 222. The shock absorber 2 forms an air hole 27 extending from the shaft tube portion 221 to the limiting portion 222 in the axial direction and communicating with the upper connector 21. The shaft portion 221 passes through the lower connecting member 23 and is recessed from the outer circumferential surface to form a plurality of guide grooves 223 extending in the axial direction. The limiting portion 222 cooperates with the upper connecting member 21 to limit the range of the lower connecting member 23 and the buffer spring 26 moving up and down. The lower connecting member 23 defines a plurality of accommodating holes 231 that are aligned with and communicate with the guide grooves 223 inwardly from the outer circumferential surface in the radial direction. The balls 24 are respectively placed in the guide grooves 223 and the accommodating holes 231. A part of each ball 24 is in the corresponding accommodating hole 231, and the other part is in the corresponding guide groove 223, and is connected to the shaft tube. Section 221 is in rolling contact. In this embodiment, the positioning members 25 are bolts, and are respectively locked in the accommodating holes 231 from the outside to the inside, so that the balls 24 will not fall out of the accommodating holes 231. When any ball 24 is to be replaced, the corresponding positioning member 25 only needs to be removed, and the ball 24 can be taken out of the corresponding receiving hole 231 and replaced. The buffer spring 26 is sleeved on the shaft tube portion 221, and the upper and lower ends respectively abut against the lower connecting piece 23 and the limiting portion 222, and make the lower connecting piece 23 abut against the upper connecting piece through its own elastic force Piece 21. When the lower connecting piece 23 is pulled down, the lower connecting piece 23 can be moved downward relative to the guide post 22 and the upper connecting piece 21 as shown in FIG. 4, so that the top end of the lower connecting piece 23 faces the The limiting portion 222 is close (that is, the lower connecting member 23 is far away from the upper connecting member 21), and then the cushion spring 26 is compressed, so that the effects of shock absorption and shock absorption can be achieved. In the foregoing process, the balls 24 respectively travel along the Wait for the guide groove 223 to roll downwards to avoid excessive friction when the lower connecting member 23 slides relative to the shaft tube, and to prevent the lower connecting member 23 from twisting relative to the guide post 22, which improves the smoothness of sliding.

1, 2, and 5, the top end of the diversion seat 3 is screwed to the lower connecting piece 23, and surrounds and defines an air flow channel 31 communicating with the air hole 27, and an airflow channel 31 that surrounds and communicates with the air hole 27 along its circumference. The annular groove 32 of the air flow channel 31 and a cavity 33 communicating with the annular groove 32. The socket 4 includes a main seat body 41 connected to the bottom end of the diversion seat 3, a receiving tube 42 extending downward from the main seat body 41, a plurality of limiting beads 43 arranged on the receiving tube 42, and a A sleeve 44 sleeved on the receiving pipe 42. The main seat 41 surrounds and defines a chamber 411 located below the cavity 33 and an exhaust hole 412 extending in the radial direction to communicate with the chamber 411 and the outside. The receiving pipe 42 is radially formed with a plurality of mounting holes 421 into which the limiting beads 43 are respectively inserted. When the sleeve 44 is sleeved on the receiving pipe 42, the mounting holes 421 will be blocked, so that the limiting beads 43 can be inserted. The bead 43 will not roll out.

The striker 5 is slidably arranged in the chamber 33 and the chamber 411, and divides the chamber 33 into an upper cavity space 331 that does not communicate with the ring groove 32 and the chamber 411, And an annular space 332 that is not directly connected to the cavity space 331 and communicates with the annular groove 32. The striker 5 includes a push top 51 that distinguishes the cavity space 331 above itself and the annular space 332 below itself, and a push top 51 extending downward from the push top 51 and whose outer diameter is smaller than the push top 51 The middle body part 52 and an impact part 53 extending downward from the middle body part 52 and located in the chamber 411 and having an outer diameter smaller than the middle body part 52. The middle body 52 is surrounded by the annular space 332, and a part of the middle body 52 extends in the chamber 411. The striker 5 defines four radial air passages 54 extending inward from the outer circumferential surface of the middle body 52 and an axial air passage 55 extending upward from the middle body 52 to the top surface of the push top 51. The axial air passage 55 communicates downwardly with the radial air passages 54 and upwardly communicates with the cavity space 331. The working piece 7 includes a connecting shaft portion 71 through which the receiving tube 42 and the return spring 6 are inserted so that the top end extends into the chamber 411, and a feature connected to the bottom end of the connecting shaft portion 71 and exposed to the outside部72. The connecting shaft portion 71 surrounds and forms an annular restricting groove 711 connecting the mounting holes 421 and partially inserting the restricting beads 43.

Referring to Figure 1, Figure 5, and Figure 6, when the user presses the pressure rod 12, the air pressure source will supply air to the handle 11, and enter the air flow after passing through the shock absorber 2 through the air pipe 13 In channel 31. The gas entering the air flow channel 31 will then be sent into the annular space 332 through the annular groove 32. As the gas sent into the annular space 332 gradually increases, the gas will push the push top 51 upwards, causing the push top 51 Moving upward as shown in FIG. 6, the impact part 53 originally pressed on the return spring 6 is also upward and away from the return spring 6, and at the same time, the space of the cavity 331 is gradually reduced.

Referring to Figure 1, Figure 7, and Figure 8, the impact member 5 continues to rise until the radial air passages 54 are aligned with the annular groove 32. At this time, the air flow channel 31 is originally sent into the annular groove through the annular groove 32. The gas in the space 332 will enter the radial air passages 54 instead, and then be sent into the cavity space 331 through the axial air passage 55. When the gas sent into the cavity 331 gradually increases, the push top 51 will be pushed to move downward, so that the striker 5 will move downwards quickly, and finally the striker 53 will strike after compressing the return spring 6 downwards. The connecting shaft portion 71 causes the characteristic portion 72 to process the building material downward. The impact generated at this time will also drive the lower connecting member 23 to move downward relative to the guide post 22, and absorb the shock by compressing the buffer spring 26 And impact force, to achieve the effect of shock absorption. The falling of the striker 5 will also cause the radial air passages 54 to no longer align with the annular groove 32, but to communicate with the chamber 411. Those aligned with the annular groove 32 will be replaced with the annular space 332. Then, the aforementioned steps will be repeated to make the striker 5 move upward again, and because the cavity space 331 is gradually reduced, the gas in it will be squeezed and enter through the axial air passage 55 and the radial air passages 54 The chamber 411 is finally discharged through the exhaust hole 412. Through the aforementioned continuous actions, the characteristic portion 72 can be moved up and down to process building materials. The characteristic portion 72 can be selected according to the processing requirements as shown in FIG. Processing. The replacement method only needs to remove the sleeve 44 from the receiving tube 42 and take out the limit beads 43 from the mounting holes 421, and then the work piece 7 can be removed from the socket 4 , In order to replace, improve versatility.

In summary, the present invention can drive the work piece 7 to continuously move up and down through air pressure to cut, chisel or interrupt the building materials below, so as to achieve the effect of saving manpower, and the shock absorber 2 can pass through the The buffer spring 26 absorbs the impact and achieves a good shock-absorbing effect. The design of the balls 24 and the guide grooves 223 can greatly reduce the resistance of the lower connecting member 23 when moving relative to the guide post 22, and will not be opposed to each other. When the guide post 22 is twisted, the vibration can be further reduced through the smoothness, so it can indeed achieve the purpose of cost innovation.

However, the above are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

1: Operating parts 11: Handle 111: Airflow pipe 12: Pressure bar 13: Air pipe 2: shock absorber 21: Upper connector 22: guide post 221: Shaft tube 222: Limit 223: guide groove 23: Lower connector 231: accommodating hole 24: Ball 25: Positioning piece 26: buffer spring 27: Stoma 3: Diversion seat 31: Airflow channel 32: ring groove 33: Chamber 331: Intracavity Space 332: Annular Space 4: bearing 41: Main body 411: room 412: Vent 42: Take over 421: mounting hole 43: limit bead 44: sleeve 5: Impact parts 51: push the top 52: mid body 53: Impact 54: Radial Airway 55: Axial airway 6: Return spring 7: work piece 71: Coupling 711: Circumferential limit slot 72: Feature

The other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, among which: Figure 1 is a three-dimensional exploded view illustrating an embodiment of the new type of shock-absorbing reciprocating pneumatic tool; Figure 2 is a cross-sectional view illustrating the cross-sectional aspect of Figure 1 after being combined; Figure 3 is an incomplete partial cross-sectional view illustrating one of the operating elements in this embodiment; FIG. 4 is a schematic diagram illustrating the operation process of a shock absorber in this embodiment; Figure 5 is an incomplete cross-sectional view illustrating a diversion seat, a bearing seat, an impact member, a return spring, and a working member in this embodiment; Figures 6 to 8 are schematic diagrams illustrating the operation of this embodiment; and Figure 9 is an incomplete cross-sectional view illustrating other aspects of the work piece.

1: Operating parts

11: Handle

12: Pressure bar

13: Air pipe

2: shock absorber

21: Upper connector

22: guide post

221: Shaft tube

222: Limit

223: guide groove

23: Lower connector

231: accommodating hole

25: Positioning piece

26: buffer spring

27: Stoma

3: Diversion seat

4: bearing

41: Main body

411: room

412: Vent

42: Take over

421: mounting hole

43: limit bead

44: sleeve

5: Impact parts

51: push the top

52: mid body

53: Impact

54: Radial Airway

55: Axial airway

6: Return spring

7: work piece

71: Coupling

711: Circumferential limit slot

72: Feature

Claims (8)

A shock-absorbing reciprocating pneumatic tool used in conjunction with an air pressure source, including: An operating member, connected to the air pressure source, and operable to input air flow from the air pressure source; A shock absorber connected to the operating member and including an upper connecting member connected to the operating member at the top end and connected to the operating member, a guide post connected to the upper connecting member at the top end, and a lower connection set on the guide post Piece, and a buffer spring set on the guide post and pushing the lower connecting piece upward against the upper connecting piece. The lower connecting piece is limited by the guide post and can only move between the upper connecting piece and the upper connecting piece in the up and down direction. Sliding between the bottom ends of the guide post, when the lower connecting piece is far away from the upper connecting piece, the buffer spring will be compressed; A diversion seat surrounding and defining at least one air flow channel communicating with the operating member through the shock absorber, an annular groove surrounding and communicating with the at least one air flow channel through the shock absorber, and a cavity communicating with the annular groove; A striker is arranged in the chamber so as to move up and down, and the chamber is divided into an inner space and an annular space that is not directly connected to the inner space and communicates with the ring groove, and the striker defines At least one radial air passage that can communicate with the annular groove after being aligned with the annular groove, and an axial air passage that communicates with the at least one radial air passage and extends upward to communicate with the inner space of the cavity; A socket connected to the bottom of the deflector, the socket surrounds and defines a chamber for the impact member to enter, and an exhaust hole communicating with the chamber; A return spring, arranged in the containing chamber and located directly below the striker; and A working piece includes a connecting shaft part through which the bearing and the return spring are inserted so that the top end extends into the chamber, and a feature part connected to the bottom end of the connecting shaft part, the connecting shaft part can be up and down The moving place is limited to the seat. The shock-absorbing reciprocating pneumatic tool according to claim 1, wherein the operating member includes a handle that surrounds and defines an air duct connected to the air pressure source, and a handle that is arranged on the handle and can be operated to control the The airflow of the air pressure source enters the pressure rod of the airflow pipe, and an air pipe connected with the handle and connected with the airflow pipe. The shock-absorbing reciprocating pneumatic tool according to claim 1, wherein the guide post of the shock absorber has a shaft tube part whose top end is locked on the upper connecting piece, and an outer diameter connected to the bottom end of the shaft tube part Is larger than the limiting portion of the shaft tube portion, the shaft tube portion passes through the lower connecting piece, and the limiting portion is used to limit the downward movement of the lower connecting piece. It extends to the limiting portion and communicates with the air hole of the upper connecting piece. The shock-absorbing reciprocating pneumatic tool according to claim 3, wherein the lower connecting member is provided with a plurality of accommodating holes in the radial direction, and the shaft tube portion of the shock absorber is recessed from the outer circumferential surface to form a plurality of guides extending in the axial direction. Grooves, the guide grooves respectively communicate with the accommodating holes, the shock absorber further includes a plurality of balls respectively accommodated in the accommodating holes and the guide grooves, and a plurality of balls are respectively locked in from the outside to the inside For the positioning parts of the accommodating holes, a part of each ball is located in the corresponding accommodating hole, and the other part is located in the corresponding guide groove, and is in rolling contact with the shaft tube portion. The shock-absorbing reciprocating pneumatic tool according to claim 1, wherein the striker includes a push top that divides the cavity into the cavity space above it and the annular space below it, and The push top extends downward and the outer diameter is smaller than the push top and the middle body part is surrounded by the annular space, and an impact part extends downward from the middle body and is used to hit the top of the connecting shaft of the work piece. The shock-absorbing reciprocating pneumatic tool according to claim 5, wherein the at least one radial air passage extends radially inward from the outer peripheral surface of the middle body, and the axial air passage extends from the inner side of the middle body upward in the axial direction to The top surface of the push top. The shock-absorbing reciprocating pneumatic tool according to claim 1, wherein the socket includes a main seat body defining the chamber and the exhaust hole, and a main seat body extending downward from the main seat body for the work piece A socket pipe through which the connecting shaft part penetrates, and a sleeve sleeved on the socket pipe. The shock-absorbing reciprocating pneumatic tool according to claim 7, wherein the receiving pipe of the socket is formed with a plurality of mounting holes in the radial direction, the connecting shaft portion of the working piece surrounds and forms an annular limit groove, and the socket further includes A plurality of limit beads are respectively arranged in the installation holes and partly placed in the circumferential limit groove, and the sleeve covers the installation holes.

Images