Pneumatic reciprocating saw

Abstract

The utility model discloses a pneumatic reciprocating saw, and relates to the technical field of reciprocating saws. Comprising a rear cover, an air inlet cavity and a valve assembly located on one side of the air inlet cavity are arranged in the rear cover, a shell is arranged at one end of the rear cover, an air inlet connector, a reciprocating piston, a reversing block, an air cylinder and a chuck base are sequentially arranged at the end, located on the rear cover, in the shell, and the end, away from the reciprocating piston, of the air inlet connector extends into the air inlet cavity; a reciprocating rod set is movably arranged in the air cylinder. The two ends of the air cylinder part are cushioned through the first reset spring and the second reset spring, the air cylinder does not make direct contact with the shell, the air cylinder is hung in the shell, in the using process, vibration transmitted to the shell can be reduced, the comfort degree of a user in the using process is greatly improved, and hand numbness is avoided after long-time use; and the labor intensity is greatly reduced, higher reciprocating frequency and cutting efficiency are achieved, the working efficiency is guaranteed, using is safer, and wide application prospects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating saws, in particular to a pneumatic reciprocating saw. Background Technique

[0002] A reciprocating saw is a manual or electric cutting tool composed of a toothed saw blade, a pull rod and a fixed handle. According to the needs of different working occasions, reciprocating saws can be divided into two types: manual reciprocating saws and electric reciprocating saws.

[0003] For the existing pneumatic reciprocating saws on the market, the cylinder part is tightly fitted with the housing. During use, the cylinder will directly transmit vibrations to the housing, resulting in poor comfort for users to hold and numb hands after a long time, and the use effect is not ideal. Content of the Utility Model

[0004] The utility model provides a pneumatic reciprocating saw to solve the problems in the background technique.

[0005] To achieve the above object, the utility model provides the following technical solution: A pneumatic reciprocating saw includes a rear cover. An air inlet cavity and a valve assembly located on one side of the air inlet cavity are arranged inside the rear cover. One end of the rear cover is provided with a housing. Inside the housing, an air inlet connector, a reciprocating piston, a commutation block, a cylinder and a chuck seat are sequentially arranged at one end of the rear cover. One end of the air inlet connector away from the reciprocating piston extends into the air inlet cavity. A reciprocating rod group is movably arranged inside the cylinder. One end of the reciprocating rod group away from the cylinder penetrates through the chuck seat and is threadedly connected with a saw blade chuck. A chuck positioning sleeve is sleeved outside the saw blade chuck. A saw blade body is arranged inside one end of the saw blade chuck. A trigger for driving the valve assembly is movably arranged on the housing.

[0006] Further, an air inlet connection screw is arranged inside the end of the rear cover away from the housing, and a plurality of screw sealing rings are sleeved on the surface of the air inlet connection screw.

[0007] Further, the valve assembly includes a switch pin. One end of the switch pin extends outside the housing and is located on one side of the trigger, and a sealing head spring is arranged at the other end of the switch pin.

[0008] Further, one end of the sealing head spring away from the switch pin is provided with a sealing head screw threadedly sleeved inside the rear cover, and an air inlet sealing ring is sleeved outside the end of the switch pin away from the trigger.

[0009] Further, a first return spring is sleeved outside one end of the air inlet connector, and the other end is attached to one side of the reciprocating piston. The side of the reciprocating piston away from the air inlet connector is attached to the commutation block, and a connecting block is arranged inside the commutation block.

[0010] Further, a cavity communicating with the inside of the intake connector is eccentrically arranged inside the reciprocating piston and the commutation block. Waist-shaped holes are formed on both sides of the cylinder, and sound-absorbing cotton pads corresponding to the two waist-shaped holes are arranged on both sides of the cylinder.

[0011] Further, a copper sleeve sleeving on the surface of the reciprocating rod group and a buffer pad located on one side of the copper sleeve are arranged inside the collet seat.

[0012] Further, a nut is threadedly sleeved on a section of the reciprocating rod group located outside the collet seat. One side of the nut abuts against one end of the saw blade collet, and a second return spring is sleeved outside the collet seat.

[0013] Further, a screw with one end screwed into the saw blade collet and the inside of the saw blade body is arranged inside the collet positioning sleeve.

[0014] Further, a steel hook is arranged at one end of the housing. One end of the steel hook is U-shaped and bent to one side of the housing.

[0015] Compared with the prior art, the present utility model provides a pneumatic reciprocating saw, which has the following beneficial effects:

[0016] For this pneumatic reciprocating saw, both ends of the cylinder part are shock-absorbed by the first return spring and the second return spring, and the cylinder is not in direct contact with the housing. The cylinder is suspended inside the housing. During use, the vibration transmitted to the housing can be reduced, greatly improving the comfort of the user during use. Moreover, the user's hand will not go numb after long-term use, greatly reducing the labor intensity, and having a higher reciprocating frequency and cutting efficiency, ensuring the working efficiency, being safer to use, and having a broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a side view of the structure of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the housing of the present utility model;

[0020] Figure 4 is a sectional view of the cylinder structure of the present utility model;

[0021] Figure 5 is a sectional view of the rear cover structure of the present utility model;

[0022] Figure 6 is a sectional view of the reciprocating rod group structure of the present utility model.

[0023] In the figure: 1. Rear cover; 101. Air intake cavity; 2. Air intake connection screw; 201. Screw sealing ring; 3. Switch pin; 301. Head spring; 302. Head screw; 303. Air intake sealing ring; 4. Air intake connector; 401. Return spring I; 5. Reciprocating piston; 6. Commutator block; 601. Connecting block; 7. Cylinder; 8. Chuck seat; 801. Return spring II; 802. Copper sleeve; 803. Buffer pad; 9. Reciprocating rod group; 901. Nut; 10. Sound-absorbing cotton pad; 11. Saw blade chuck; 12. Chuck positioning sleeve; 13. Saw blade body; 14. Steel hook; 15. Trigger; 16. Outer shell. Detailed implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1-6 , the present invention discloses a pneumatic reciprocating saw, including a rear cover 1. An air intake cavity 101 and a valve assembly located on one side of the air intake cavity 101 are arranged inside the rear cover 1. One end of the rear cover 1 is provided with an outer shell 16. Inside the outer shell 16, an air intake connector 4, a reciprocating piston 5, a commutator block 6, a cylinder 7, and a chuck seat 8 are sequentially arranged at one end of the rear cover 1. One end of the air intake connector 4 away from the reciprocating piston 5 extends into the air intake cavity 101. A reciprocating rod group 9 is movably arranged inside the cylinder 7. One end of the reciprocating rod group 9 away from the cylinder 7 penetrates through the chuck seat 8 and is threadedly connected to a saw blade chuck 11. A chuck positioning sleeve 12 is sleeved outside the saw blade chuck 11. A saw blade body 13 is arranged inside one end of the saw blade chuck 11. A trigger 15 for driving the valve assembly is movably arranged on the outer shell 16. Both ends of the cylinder 7 part are shock-absorbed by a return spring I 401 and a return spring II 801, and the cylinder 7 is not in direct contact with the outer shell 16. The cylinder 7 is suspended inside the outer shell 16. During use, the vibration transmitted to the outer shell 16 can be reduced, greatly improving the comfort of the user during use, and the hands will not go numb after long-term use, greatly reducing the labor intensity and having a higher reciprocating frequency and cutting efficiency, ensuring the working efficiency, being safer to use, and having a broad application prospect.

[0026] Specifically, an air intake connection screw 2 is arranged inside one end of the rear cover 1 away from the outer shell 16. A plurality of screw sealing rings 201 are sleeved on the surface of the air intake connection screw 2. The air intake connection screw 2 is used to connect the air source, and the screw sealing ring 201 is used for sealing between the air intake connection screw 2 and the rear cover 1.

[0027] Specifically, the valve assembly includes a switch pin 3. One end of the switch pin 3 extends to the outside of the housing 16 and is located on one side of the trigger 15. A sealing head spring 301 is provided at the other end of the switch pin 3. A sealing head screw 302 that is threadedly sleeved inside the rear cover 1 is provided at the end of the sealing head spring 301 that is away from the switch pin 3. An air inlet sealing ring 303 is sleeved outside the end of the switch pin 3 that is away from the trigger 15. By rotating the sealing head screw 302, the pressure of the sealing head spring 301 on the switch pin 3 can be adjusted. The switch pin 3 cooperates with the air inlet sealing ring 303 to block the air entering the air inlet cavity 101 from the air inlet connecting screw 2, so that the reciprocating saw is in a closed state. When the user presses the trigger 15 to abut against the switch pin 3, the switch pin 3 drives the air inlet sealing ring 303 to compress the sealing head spring 301 to release the air block, so that the air inside the air inlet connecting screw 2 can smoothly enter the inside of the air inlet cavity 101, making it more convenient to use.

[0028] Specifically, a first return spring 401 is sleeved outside one end of the air inlet connector 4, and the other end is in contact with one side of the reciprocating piston 5. The side of the reciprocating piston 5 that is away from the air inlet connector 4 is in contact with the commutation block 6. A connecting block 601 is provided inside the commutation block 6.

[0029] Specifically, a cavity that is communicated with the inside of the air inlet connector 4 is eccentrically provided inside the reciprocating piston 5 and the commutation block 6. Waist-shaped holes are provided on both sides of the cylinder 7, and sound-absorbing cotton pads 10 corresponding to the two waist-shaped holes are provided on both sides of the cylinder 7. After the air inside the air inlet cavity 101 enters the cavity inside the reciprocating piston 5 and the commutation block 6, it pushes the cylinder 7. The cylinder 7 drives the reciprocating rod group 9 to push the saw blade chuck 11 and the saw blade body 13 forward. During this process, the cylinder 7 drives the chuck seat 8 to compress the second return spring 801. When the cylinder 7 moves away from the reciprocating piston 5, the air flows from one end of the cylinder 7 to both sides of the cylinder 7, passes through the sound-absorbing cotton pads 10, and then enters the inside of the cylinder 7 through the waist-shaped holes to push the cylinder 7 in the reverse direction. At the same time, the second return spring 801 rebounds to abut against the chuck seat 8 to drive the cylinder 7 to push in the reverse direction, so that the cylinder 7 is again in contact with the commutation block 6. The gas inside the commutation block 6 again pushes the cylinder 7 forward. Repeating like this, the cylinder 7 drives the saw blade body 13 to perform a reciprocating motion.

[0030] Specifically, a copper sleeve 802 that is sleeved on the surface of the reciprocating rod group 9 and a buffer pad 803 located on one side of the copper sleeve 802 are provided inside the chuck seat 8. The buffer pad 803 is used to reduce the collision between the nut 901 and the chuck seat 8 when the saw blade chuck 11 performs a reciprocating motion.

[0031] Specifically, a nut 901 is threadedly sleeved on a section of the reciprocating rod group 9 located outside the chuck seat 8. One side of the nut 901 abuts against one end of the saw blade chuck 11. A second return spring 801 is sleeved outside the chuck seat 8. After the reciprocating rod group 9 is threadedly connected to the saw blade chuck 11, in order to prevent loosening, it is locked again by the nut 901.

[0032] Specifically, a screw is provided inside the chuck positioning sleeve 12, and one end of the screw is screwed into the inside of the saw blade chuck 11 and the saw blade body 13. The saw blade body 13 is fixed by the screw. The saw blade body 13 can be taken out from the inside of the saw blade chuck 11 by removing the screw.

[0033] Specifically, a steel hook 14 is provided at one end of the housing 16. One end of the steel hook 14 is U-shaped and bent to one side of the housing 16. The steel hook 14 can be hung on a wall surface or other objects when the reciprocating saw is restricted.

[0034] In summary, for this pneumatic reciprocating saw, both ends of the cylinder 7 part are shock-absorbed by the first return spring 401 and the second return spring 801, and the cylinder 7 does not directly contact the housing 16. The cylinder 7 is suspended inside the housing 16. During use, the vibration transmitted to the housing 16 can be reduced, greatly improving the comfort of the user during use. Moreover, the user's hand will not go numb after long-term use, the labor intensity is greatly reduced, and it has a higher reciprocating frequency and cutting efficiency, ensuring the working efficiency, being safer to use, and having broad application prospects.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic reciprocating saw, comprising a rear cover (1), characterized in that: An air intake chamber (101) and a valve assembly located on one side of the air intake chamber (101) are arranged inside the rear cover (1); a shell (16) is arranged at one end of the rear cover (1); an air intake connector (4), a reciprocating piston (5), a reversing block (6), a cylinder (7) and a chuck seat (8) are arranged in sequence inside the shell (16) located at one end of the rear cover (1); the air intake connector (4) extends to the interior of the air intake chamber (101) from the end of the reciprocating piston (5); a reciprocating rod group (9) is movably arranged inside the cylinder (7); the end of the reciprocating rod group (9) away from the cylinder (7) passes through the chuck seat (8) and is threadedly connected to a saw blade chuck (11); a chuck positioning sleeve (12) is arranged on the outer sleeve of the saw blade chuck (11); a saw blade body (13) is arranged inside one end of the saw blade chuck (11); and a trigger (15) for driving the valve assembly is movably arranged on the shell (16).

2. A pneumatic reciprocating saw according to claim 1, characterized in that: An air intake connecting screw (2) is arranged inside one end of the rear cover (1) away from the outer shell (16), and a plurality of screw sealing rings (201) are sleeved on the surface of the air intake connecting screw (2).

3. A pneumatic reciprocating saw according to claim 1, characterized in that: The valve assembly comprises a switch pin (3), one end of which extends to the outside of the housing (16) and is located on one side of the trigger (15), and the other end of which is provided with a head spring (301).

4. A pneumatic reciprocating saw according to claim 3, characterized in that: The end of the sealing spring (301) away from the switch pin (3) is provided with a sealing screw (302) sleeved with the internal thread of the rear cover (1), and the end of the switch pin (3) away from the trigger (15) is sleeved with an air intake sealing ring (303).

5. A pneumatic reciprocating saw according to claim 1, characterized in that: One end of the air intake connector (4) is externally sleeved with a return spring (401), and the other end is fitted with one side of a reciprocating piston (5); the side of the reciprocating piston (5) away from the air intake connector (4) is fitted with a reversing block (6), and a connecting block (601) is provided inside the reversing block (6).

6. A pneumatic reciprocating saw according to claim 1, characterized in that: The reciprocating piston (5) and the reversing block (6) are eccentrically provided with a cavity which is connected to the inside of the air intake connector (4), and waist-shaped holes are provided on both sides of the cylinder (7), and silencer cotton pads (10) are provided on both sides of the cylinder (7) respectively corresponding to the two waist-shaped holes.

7. A pneumatic reciprocating saw according to claim 1, characterized in that: The interior of the chuck seat (8) is provided with a copper sleeve (802) sleeved with the surface of the reciprocating rod group (9) and a buffer pad (803) located on one side of the copper sleeve (802).

8. A pneumatic reciprocating saw according to claim 1, characterized in that: A nut (901) is threadedly sleeved on a section of the reciprocating rod assembly (9) located outside the chuck seat (8), one side of the nut (901) contacts one end of the saw blade chuck (11), and a second return spring (801) is sleeved on the outside of the chuck seat (8).

9. A pneumatic reciprocating saw according to claim 1, characterized in that: The interior of the chuck positioning sleeve (12) is provided with a screw whose end is screwed into the interior of the saw blade chuck (11) and the saw blade body (13).

10. A pneumatic reciprocating saw according to claim 1, characterized in that: A steel hook (14) is provided at one end of the outer shell (16), and one end of the steel hook (14) is U-shaped and bent to one side of the outer shell (16).

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