CN211639771U

CN211639771U - Pneumatic impact hammer

Info

Publication number: CN211639771U
Application number: CN202020177855.2U
Authority: CN
Inventors: 丁惠忠
Original assignee: Shazhou Professional Institute of Technology
Current assignee: Shazhou Professional Institute of Technology
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-10-09
Anticipated expiration: 2030-02-17

Abstract

The utility model belongs to the technical field of impact tools, and particularly discloses a pneumatic impact hammer, which comprises an end cover, a shell body, a piston and a hammer head, wherein the end cover is provided with a first air inlet and outlet, the end cover is internally provided with an air cavity, the shell body is internally provided with a working cavity, and the piston is hermetically and slidably connected in the working cavity; the center of the base is provided with a communication port communicated with the working cavity; after the installation, a sliding cavity is reserved between the shell body and the base, and a second air inlet and outlet is formed in the shell body; a driving block and a first pressure spring are arranged in the sliding cavity; the base is connected with a connecting rod in a sliding way, and one end of the connecting rod is provided with a rubber disc which can extend into the communicating port and is propped against the side surface of the hammer head. The impact force of tup return stroke can effectively be alleviated to this pneumatic percussion hammer to and can clear up the material of adhesion on the tup fast.

Description

Pneumatic impact hammer

Technical Field

The utility model belongs to the technical field of the impact tool, especially, relate to a pneumatic percussion hammer.

Background

When the pneumatic impact hammer works, the generated regular and intermittent reciprocating mechanical energy is transmitted through the outer wall of the container and acts on the material, so that the material is separated from the container, and the bridge hole blockage of the material is destroyed.

The prior pneumatic impact hammer has the following problems in the working process: the impact force of the hammer head of the impact hammer in return stroke is large, so that the whole impact hammer and a working surface are loosened, and the continuous work of the hammer head and the stability of the work of the hammer head are influenced; some materials with higher viscosity can adhere to the hammer head, thereby influencing the blockage of the bridge hole of the hammer head for destroying the materials and requiring workers to clean the hammer head.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can effectively alleviate the impact force of tup return stroke to and can carry out the pneumatic percussion hammer of clearance to the material of adhesion on the tup.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a pneumatic impact hammer comprises an end cover, a shell body, a piston and a hammer head, wherein the end cover is fixedly connected with the shell body, a first air inlet and an air outlet are formed in the end cover, and an air cavity is formed in the end cover;

a working cavity is formed in the shell body, a piston is hermetically and slidably connected in the working cavity along the vertical central line of the shell body, and a hammer head is fixedly connected on the piston;

the shell also comprises a base arranged on the shell body, and a communication port communicated with the working cavity is formed in the center of the base; after installation, a sliding cavity is reserved between the shell body and the base, and a second air inlet and outlet communicated with the sliding cavity is formed in the shell body; a driving block and a first pressure spring capable of driving the driving block to vertically slide upwards are arranged in the sliding cavity along the vertical central line direction of the shell body;

along the vertical central line direction of perpendicular shell body, sliding connection has the connecting rod on the base, and the one end of connecting rod is equipped with and stretches into the intercommunication mouth to the rubber disc that offsets with the side of tup.

Preferably, the cross section of the sliding cavity is annular, the number of the connecting rods is multiple, and the connecting rods are arranged on the sliding cavity in a display mode.

Preferably, a second buffer spring is arranged on the communication port of the base.

Preferably, a partition plate is arranged between the end cover and the shell body, and a central hole is formed in the partition plate.

Preferably, the lower cross-section of the housing body is gradually increased.

Preferably, the connecting rod and the rubber disc are connected through threads.

Preferably, a concave cavity is formed in one side, facing the vertical center line of the shell body, of the rubber disc.

The beneficial effects of this technical scheme do:

(1) in the return process of the hammer head, gas is introduced into the sliding cavity through the second gas inlet and outlet to drive the driving block to vertically slide downwards, so that the connecting rod is pushed to move towards the vertical central line of the base, and the rubber disc is abutted against the side surface of the hammer head; on the other hand, as the rubber disc is made of rubber, when the rubber disc is in contact with the side surface of the hammer head, the impact force generated during the return stroke of the hammer head can be effectively relieved, and the continuity and the stability of the work of the hammer head are ensured.

(2) The cross section of the lower part of the shell body is gradually increased, so that the stability of the whole impact hammer can be improved.

(3) After the base is installed on the shell body, the hammer head goes out of the communicating port on the base and goes back through the communicating port on the base, a sliding cavity is formed between the base and the shell body, and the manufacturing and machining process is very convenient.

Drawings

Fig. 1 is a longitudinal sectional view of embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

fig. 4 is a longitudinal sectional view of a base in embodiment 1 of the present invention;

fig. 5 is a schematic structural view of a connecting rod and a rubber disc in embodiment 1 of the present invention;

fig. 6 is a schematic structural view of a connecting rod and a rubber disc in embodiment 2 of the present invention.

Reference numerals in the drawings of the specification include: the air compressor comprises an end cover 1, a first air inlet and outlet 101, an air cavity 102, a shell body 2, a second air inlet and outlet 202, a working cavity 203, a partition plate 3, a piston 4, a hammer 5, a base 6, a connecting rod 601, a rubber disc 602, a communication port 603, a limiting compression spring 604, a second buffer spring 605, a sliding cavity 7, a driving block 701 and a first compression spring 702.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

The embodiment is basically as shown in the attached figures 1-5: a pneumatic impact hammer comprises an end cover 1, a shell body 2, a piston 4 and a hammer head 5, wherein the end cover 1 and the shell body 2 are made of carbon steel, the end cover 1 and the shell body 2 are fixedly connected through bolts, and holes for connecting the bolts are formed in the top of the end cover 1 and the top of the shell body 2 as shown in figure 1. The bottom of the shell body 2 is provided with a bolt mounting hole for connecting with a working surface. The cross section of the lower portion of the housing body 2 gradually increases.

As shown in fig. 1, the top of the end cap 1 is opened with a first air inlet 101, and the end cap 1 is opened with an air cavity 102.

As shown in fig. 1, a working chamber 203 is formed in the housing body 2, the piston 4 is hermetically and slidably connected in the working chamber 203 along a vertical center line of the housing body 2, and the hammer 5 is fixedly connected to a lower surface of the piston 4 by a bolt. A partition plate 3 is arranged between the end cover 1 and the shell body 2, and a central hole communicated with the working cavity 203 is formed in the partition plate 3.

As shown in fig. 1 and 4, the impact hammer further includes a base 6 fixedly connected to the housing body 2 by bolts, bolt mounting holes corresponding in position are formed in the bottom of the base 6 and the bottom of the housing body 2, and a communication port 603 communicated with the working chamber 203 is formed in the center of the base 6.

As shown in fig. 1 and 3, after installation, a sliding cavity 7 is left between the shell body 2 and the base 6, and a second air inlet and outlet 202 communicated with the sliding cavity 7 is arranged on the shell body 2; a driving block 701 is hermetically and vertically slidably connected to the sliding chamber 7 along the vertical center line of the housing body 2, and a first pressure spring 702 capable of driving the driving block 701 to slide upward is provided.

Along the vertical central line direction of perpendicular shell body 2, sliding connection has connecting rod 601 on base 6, and the one end of connecting rod 601 has through bolted connection can stretch into intercommunication mouth 603, and the rubber disc 602 (as in fig. 5) that offsets with the side of tup 5. The rubber disc 602 is trapezoidal in longitudinal section.

A limit block and a limit pressure spring 604 for driving the connecting rod 601 to move away from the vertical central line of the shell body 2 are arranged on the rod body of the connecting rod 601.

As shown in fig. 2, the sliding chamber 7 has a ring-shaped cross section, and the number of the connecting rods 601 is plural, and in the embodiment, it is preferable that the number of the connecting rods 601 is sixteen, and sixteen connecting rods 601 are arranged on the sliding chamber 7 in an array.

Two rows of second buffer springs 605 are provided in the communication port 603 of the base 6.

As shown in fig. 3, when the hammer 5 returns, gas is introduced into the sliding cavity 7 through the second gas inlet and outlet 202 to drive the driving block 701 to vertically slide downwards, so as to push the connecting rod 601 to move towards the vertical center line of the base 6, and the rubber discs 602 are abutted against the hammer 5, on one hand, when the hammer 5 acts on a material with a relatively large viscosity, the material adheres to the hammer 5, which affects bridge blockage of the hammer 5 to destroy the material, and sixteen rubber discs 602 on the impact hammer can rapidly clean the hammer 5; on the other hand, the rubber disc 602 is made of rubber, and when the rubber disc contacts the hammer 5, the impact force generated when the hammer 5 returns can be effectively relieved, and the continuity and stability of the work of the hammer 5 are ensured.

Example 2

As shown in fig. 6, the present embodiment differs from embodiment 1 only in that: the rubber disc 602 is provided with a concave cavity on the side facing the vertical center line of the housing body 2. The whole rubber disc 602 forms a structure similar to a sucker, and further relieves the impact force of the hammer 5 during return stroke.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A pneumatic impact hammer is characterized by comprising an end cover (1), a shell body (2), a piston (4) and a hammer head (5), wherein a first air inlet and outlet (101) is formed in the end cover (1), and an air cavity (102) is formed in the end cover (1);

a working cavity (203) is formed in the shell body (2), a piston (4) is hermetically and slidably connected in the working cavity (203) along the vertical central line of the shell body (2), and a hammer head (5) is fixedly connected to the piston (4);

the device also comprises a base (6) arranged on the shell body (2), and a communication port (603) communicated with the working cavity (203) is formed in the center of the base (6); after installation, a sliding cavity (7) is reserved between the shell body (2) and the base (6), and a second air inlet and outlet (202) communicated with the sliding cavity (7) is formed in the shell body (2); a driving block (701) and a first pressure spring (702) capable of driving the driving block (701) to vertically slide upwards are arranged in the sliding cavity (7) along the vertical central line direction of the shell body (2);

along the vertical central line direction of perpendicular shell body (2), sliding connection has connecting rod (601) on base (6), and the one end of connecting rod (601) is equipped with and stretches into intercommunication mouth (603) to rubber disc (602) that offset with the side of tup (5).

2. A pneumatic percussion hammer according to claim 1, wherein the sliding chamber (7) is annular in cross-section, the number of connecting rods (601) is plural, and the plural connecting rods (601) are arranged in an array on the sliding chamber (7).

3. A pneumatic percussion hammer according to claim 1, characterised in that the communication opening (603) of the base (6) is provided with a second damping spring (605).

4. A pneumatic percussion hammer according to claim 1, characterised in that a partition plate (3) is provided between the end cap (1) and the housing body (2), the partition plate (3) being provided with a central opening.

5. A pneumatic percussion hammer according to claim 1, characterised in that the lower cross-section of the housing body (2) is gradually increased.

6. A pneumatic percussion hammer according to claim 1, characterised in that the connecting rod (601) and the rubber disc (602) are connected by a screw thread.

7. A pneumatic percussion hammer according to claim 6, characterised in that the rubber disc (602) is recessed on the side facing the vertical centre line of the housing body (2).