CN210701783U - Self-hammering device using compressed air to generate self-hammering force - Google Patents

Abstract

The utility model discloses a self-hammering device which utilizes compressed air to generate self-hammering force, comprising a shell, a cylinder body and a compressed air channel; an impact body assembly is integrated at one end of the working cavity, and a hammering piston assembly is integrated at the other end of the working cavity; a scavenging valve air chamber is formed between the front end of the cylinder body and the shell, and a scavenging valve piston assembly is embedded in the scavenging valve air chamber; the copper electrode sequentially penetrates through the impact body assembly, the hammering piston assembly and the scavenging valve piston assembly in the cylinder body; the utility model discloses a from hammer device utilizes compressed air in the air chamber to play the promotion in order to produce outside drawing force to inside functional unit, simultaneously, the mode and the panel beating welded surface of spot welding are fixed to the copper electrode utilization, strike body subassembly and hammering piston assembly drive copper electrode and draw to the rear after the spot welding to realize just can restoreing the design purpose at panel beating depressed part from the panel beating surface.

Description

Self-hammering device using compressed air to generate self-hammering force

Technical Field

The utility model relates to a panel beating maintenance technical field specifically is a device that is fit for car panel beating maintenance, industry panel beating box maintenance, domestic panel beating furniture maintenance, especially relates to an utilize compressed air to produce from hammer device of power.

Background

Most of the sheet metal on the outer shell of the vehicle is of a double-layer structure, the sheet metal on the outer layer is sunken due to impact, and the most effective maintenance method is to knock the iron hammer from one side of the sheet metal in the vehicle, however, the sheet metal is of the double-layer structure, the external sheet metal can be knocked only by destroying the internal sheet metal, and after the external sheet metal is repaired, the destroyed internal sheet metal is welded and repaired; the vehicle metal plate is repaired in the mode, so that the vehicle metal plate is high in damage degree and cannot be eliminated.

Referring to fig. 1, fig. 1 is a schematic view showing the structure of a prosthetic device according to the prior art;

at present, the restoration of car panel beating is all with the restoration technology on the manual hammer that draws, welds the sunk part at outside panel beating with the spot welding head on welding power slide bar top, and operating personnel needs hold the tail end of drawing the slide bar in one hand, holds manual slide hammer in the other hand, and the slide bar tail end is drawn to drawing hard fast and slides, and when slide hammer striking slide bar tail end locating piece, the slide bar drives the outside motion of panel beating sunk part, outwards pulls out the sunken panel beating from this, reaches the prosthetic purpose of panel beating.

In the repairing device in the prior art, the size of the striking force is determined by the sliding force of a hand, the drawing force is very difficult to control, if the force is too large, a concave metal plate is reversely protruded, a hand hammer is used for knocking back the protruded point to form secondary repairing, and the working difficulty is increased; if the force is too small, the deformation of the concave part of the metal plate is very small, and repeated welding and hammering drawing are needed for many times; moreover, two hands of a worker are required to operate simultaneously, the repeated times of work are increased, and the efficiency of metal plate repairing work is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem that the restoration degree of difficulty is big among the prior art, working strength is big and inefficiency, providing a novel structure, utilize compressed air to produce from the hammer device of power in order to realize producing the drawing force to the panel beating surface from the hammer.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model discloses an utilize compressed air to produce from hammer device of hammer power, include:

the device comprises a shell, a handle and a positioning mechanism, wherein the shell is provided with a working part and an operating part, and an installation cavity is formed in the working part;

the cylinder body is integrated in the mounting cavity, and a working cavity is formed in the cylinder body;

the hammer control device comprises a compressed air channel formed in the operating part, wherein a hammer switch is mounted on the operating part and used for switching the communication state of the compressed air channel;

an impact body assembly is integrated at one end of the working cavity, and a hammering piston assembly is integrated at the other end of the working cavity;

an air chamber distributed along the circumferential direction of the cylinder body is reserved between the cylinder body and the shell;

a middle sealing rubber ring of the cylinder body is fixed in the middle of the cylinder body along the circumferential direction of the cylinder body, and the middle sealing rubber ring of the cylinder body divides the air chamber into a hammering air chamber and a hammering piston return air chamber;

the hammering air chamber is communicated with the compressed air channel to receive externally conveyed compressed air;

a scavenging valve air chamber is formed between the front end of the cylinder body and the shell, and a scavenging valve piston assembly is embedded in the scavenging valve air chamber;

the air exchange valve piston assembly is slidable along the air exchange valve air chamber to close to and form a seal with the cylinder block or to move away from the cylinder block and form a hammering piston front air chamber with the cylinder block by changing the air pressure in the air exchange valve air chamber;

the copper electrode sequentially penetrates through the impact body assembly, the hammering piston assembly and the scavenging valve piston assembly in the cylinder body;

one end of the copper electrode is fixedly connected with the impact body assembly and partially extends to the rear side of the impact body assembly, and the other end of the copper electrode extends to the outside of the shell;

one end of the copper electrode, which is arranged outside the shell, is formed into a welding end, and the welding end is contacted with the surface of the metal plate to be overhauled;

and the part of the copper electrode, which is arranged at the rear end of the impact body assembly, is connected with an impact return spring.

Further, the cylinder body is of a hollow long cylinder structure, and two inwards-recessed annular grooves are formed in the outer portion of the cylinder body along the circumferential direction of the cylinder body;

when the cylinder block is assembled with the shell, the annular groove and the interior of the shell form the hammering air chamber and a hammering piston return air chamber;

an air leakage hole which is communicated with the hammering piston return air chamber and the working cavity is formed in the cylinder body and is positioned at the hammering piston return air chamber;

the working chamber of the cylinder block is formed as a piston rear air chamber.

Furthermore, the impact body assembly comprises an impact body embedded in the end part of the cylinder body, one end of the impact body facing the inside of the cylinder body is fixedly connected with an impact body buffer rubber ring, and the impact body buffer rubber ring is sleeved outside the copper electrode;

the copper electrode is in threaded connection with the impact body;

one end of the impact body, which faces the outer side of the cylinder body, is fixedly connected with the impact body return spring, and the impact body return spring provides the impact body with the reverse restoring force for the movement of the copper electrode;

the contact surface of the impact body and the cylinder body is provided with a cylinder rear end sealing ring.

Furthermore, the copper electrode is arranged at one end of the rear side of the impact body assembly and is electrically connected with the positive electrode of an external welding power supply;

and after the welding power supply is electrified, the welding end of the copper electrode is fixedly connected with the metal plate to be overhauled through welding current in a spot welding mode.

Furthermore, the hammering piston assembly comprises a hammering piston embedded in the cylinder body, a hammering piston central hole is formed in the axis of the hammering piston, the copper electrode penetrates through the hammering piston central hole, and a piston central hole sealing rubber ring is installed at the joint of the hammering piston central hole of the hammering piston and the copper electrode;

and a piston excircle sealing rubber ring is arranged at the joint of the hammering piston and the cylinder body.

Further, the gas exchange valve piston assembly comprises a gas exchange valve piston embedded in the gas exchange valve chamber, and the gas exchange valve piston can slide along the gas exchange valve chamber;

the axis of the gas exchange valve piston is provided with a gas exchange valve piston central hole, and the copper electrode is arranged in the gas exchange valve piston central hole in a penetrating manner;

the two ends of the piston of the scavenging valve are respectively provided with a sealing rubber ring at the rear end of the piston of the scavenging valve and a sealing rubber ring at the front end of the piston of the scavenging valve;

a gas exchange valve piston center sealing rubber ring is arranged at the joint of the gas exchange valve piston and the copper electrode;

the gas exchange valve piston assembly also comprises a gas exchange valve body assembled with the shell, and the gas exchange valve piston is assembled in the gas exchange valve body to form a gas exchange valve with the gas exchange valve body;

the piston of the scavenging valve and the valve body of the scavenging valve form sealing through an excircle rubber ring of the piston of the scavenging valve and a central sealing ring of the valve body of the scavenging valve;

the gas exchange valve piston and the copper electrode are provided with gas exchange valve piston pressure balance springs.

Furthermore, the compressed air channel comprises a first air channel and a second air channel, one end of the first air channel is opened at the operating part, and the other end of the first air channel extends to the hammering air chamber and is communicated with the hammering air chamber;

the opening of the first air path formed on the operating part is communicated with external compressed air supply equipment and conveys compressed air into the hammering air chamber;

the second air passage is communicated with the first air passage through a hammering switch embedded groove, and the second air passage is communicated with the air chamber of the air exchange valve and conveys compressed air into the air chamber of the air exchange valve.

Further, the hammering switch is embedded in the hammering switch embedding groove, and the hammering switch can slide along the hammering switch embedding groove;

the hammering switch follows when hammering switch embedded groove inwards slides, hammering switch cuts off the second gas circuit with the intercommunication of first gas circuit.

In the technical scheme, the utility model provides a pair of utilize compressed air to produce from hammer device of power has following beneficial effect:

1. the self-hammering device of the utility model utilizes the compressed air in the air chamber to push the internal functional components to generate outward drawing force, meanwhile, the copper electrode is welded and fixed with the surface of the metal plate in a spot welding mode, and the impact body assembly and the hammering piston assembly drive the copper electrode to be drawn backwards after spot welding, so as to realize the design purpose that the concave part of the metal plate can be repaired from the outer surface of the metal plate;

2. the utility model discloses a from hammer device utilizes and strikes body return spring and scavenging valve piston pressure balance spring and realize drawing back copper electrode, strike the quick return of body and hammering piston, provides convenient condition for the arm-tie next time.

3. The utility model discloses a from hammer device novel structure, need not to destroy panel beating inner layer structure and just can realize panel beating outer structure depressed part, and easy operation, overall control utilizes electrode and compressed air combined action, and repairing effect is good.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

FIG. 1 is a schematic diagram of a prior art prosthetic device;

fig. 2 is an assembled top view of a self-hammering device utilizing compressed air to generate self-hammering force according to an embodiment of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

fig. 4 is an exploded view of a self-hammering device using compressed air to generate self-hammering force according to an embodiment of the present invention.

Description of reference numerals:

1. a housing; 2. an impact body assembly; 3. a hammer piston assembly; 4. a gas exchange valve piston assembly; 5. a copper electrode; 6. a cylinder block;

101. hammering the air chamber; 102. the hammering piston returns to the air chamber; 103. a piston rear air chamber; 104. a scavenging valve air chamber; 105. hammering a front air chamber of the piston; 106. a working part; 107. an operation section;

201. an impact body; 202. an impact body return spring; 203. the impact body buffers the rubber ring;

301. hammering the piston; 302. a sealing rubber ring of a central hole of the piston; 303. a rubber ring is sealed on the excircle of the piston;

401. a gas exchange valve piston; 402. a piston pressure balance spring of the gas exchange valve; 403. a rubber ring is sealed at the front end of the piston of the scavenging valve; 404. a rubber ring is sealed at the rear end of the piston of the scavenging valve; 405. a piston center sealing rubber ring of the scavenging valve; 406. An excircle rubber ring of a piston of the scavenging valve; 407. a central sealing ring of a valve body of the scavenging valve; 408. a scavenging valve body;

501. welding the end;

601. a rubber ring is sealed in the middle of the cylinder; 602. an air release hole; 603. a rubber ring is sealed at the rear end of the cylinder;

701. a first gas path; 702. a second gas path; 703. a hammering switch; 704. the hammering switch is embedded in the groove.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

See fig. 1-2;

fig. 1 is an exploded view showing a structure of a self-hammering apparatus for generating a self-hammering force by using compressed air according to the present embodiment, and fig. 2 is a sectional view showing an assembled structure for generating a self-hammering force by using compressed air according to the present embodiment.

The self-hammering device of the present embodiment for generating self-hammering force by using compressed air comprises:

a housing 1, wherein the housing 1 is provided with a working part 106 and an operation part 107, and the working part 106 is formed into an installation chamber;

the cylinder body 6 is integrated in the installation cavity, and a working cavity is formed inside the cylinder body 6;

a compressed air passage formed in the operation unit 107, the operation unit 107 being provided with a hammer switch 703, the hammer switch 703 being configured to switch a communication state of the compressed air passage;

an impact body assembly 2 is integrated at one end of the working cavity, and a hammering piston assembly 3 is integrated at the other end of the working cavity;

an air chamber distributed along the circumferential direction of the cylinder body 6 is reserved between the cylinder body 6 and the shell 1;

a middle sealing rubber ring 601 of the cylinder body is fixed in the middle of the cylinder body 6 along the circumferential direction of the cylinder body, and the middle sealing rubber ring 601 of the cylinder body divides the air chamber into a hammering air chamber 101 and a hammering piston return air chamber 102;

the hammering air chamber 101 receives compressed air delivered from the outside in communication with the compressed air passage;

a scavenging valve air chamber 104 is formed between the front end of the cylinder block 6 and the shell 1, and a scavenging valve piston assembly 4 is embedded in the scavenging valve air chamber 104;

by varying the air pressure within the gas exchange valve air chamber 104, the gas exchange valve piston assembly 4 can slide along the gas exchange valve air chamber 104 to either close to the cylinder block 6 and form a seal with the cylinder block 6, or away from the cylinder block 6 and form a hammering piston front air chamber 105 with the cylinder block 6;

a copper electrode 5 which sequentially penetrates through the impact body assembly 2, the hammering piston assembly 3 and the gas exchange valve piston assembly 4 is arranged in the cylinder body 6;

one end of the copper electrode 5 is fixedly connected with the impact body assembly 2 and partially extends to the rear side of the impact body assembly 2, and the other end of the copper electrode 5 extends to the outside of the shell 1;

one end of the copper electrode 5, which is arranged outside the shell 1, is formed into a welding end 501, and the welding end 501 is in contact with the surface of the metal plate to be overhauled;

the part of the copper electrode 5 arranged at the rear end of the impact body assembly 2 is connected with an impact body return spring 202.

Specifically, the embodiment discloses a self-hammering device for metal plate repair, and more specifically, the self-hammering device can generate outward drawing force on a metal plate on the premise of not damaging an inner layer structure of the metal plate so as to repair a concave part of the metal plate; the shell 1 is used as a device main body, an operation part 107 is used as an operator to hold by hand, and functional mechanisms such as the impact body assembly 2, the hammering piston assembly 3, the gas exchange valve piston assembly 4, the copper electrode 5 and the like are integrated in a working cavity of the working part 106, firstly, the welding end 501 of the copper electrode 5 is fixed with a sheet metal in a mode that the copper electrode 5 can form spot welding fixation with the surface of the sheet metal after being electrified, then, the impact body assembly 2, the hammering piston assembly 3 and the gas exchange valve piston assembly 4 are driven to reciprocate back and forth by switching compressed air, when the copper electrode 5 moves backwards, a pulling force is generated, because the copper electrode 5 fixedly connected with the surface of the sheet metal through electric welding can pull out a sunken part under the action of the pulling force, the same effect as that of hammering in the interior is generated, and meanwhile, the copper electrode 5 can be reset under the action of the restoring force of the internal functional mechanisms, ready for the next drawing. Compared with the maintenance mode in the prior art, the mode has simple operation and better repair effect.

Preferably, in the present embodiment, the cylinder block 6 is a hollow long cylinder structure, and two annular grooves recessed inwards are formed on the outer portion of the cylinder block 6 along the circumferential direction thereof;

when the cylinder body 6 is assembled with the shell 1, the annular groove and the inside of the shell 1 form a hammering air chamber 101 and a hammering piston return air chamber 102;

an air release hole 602 communicating the hammering piston return air chamber 102 and the working cavity is formed in the cylinder body 6 and is positioned at the hammering piston return air chamber 102;

the working chamber of the cylinder block 6 is formed as a piston rear air chamber 103.

In the present embodiment, the structure of the cylinder block 6 is described, and since the self-hammering apparatus of the present embodiment generates the drawing force by driving the internal mechanisms to move by the pressure of the compressed air, it is necessary to reserve air chambers, namely, the hammering air chamber 101, the hammering piston return air chamber 102, and the post-piston air chamber 103, between the cylinder block 6 and the housing 1 and inside the cylinder block 6. The hammering air chamber 101 and the hammering piston return air chamber 102 are mainly formed by designing the appearance structure of the cylinder block 6, two rings of inward recessed annular grooves are designed along the circumferential direction of the cylinder block 6, and after the cylinder block 6 is embedded into the housing 1, two rings of air chambers isolated from each other by the middle sealing rubber ring 601 of the cylinder block are formed between the cylinder block 6 and the housing 1, namely, the hammering air chamber 101 and the hammering piston return air chamber 102. In addition, for subsequent work, the compressed air in the hammering air chamber 101 is decompressed into the rear piston air chamber 103, and in order to ensure that the compressed air in the rear piston air chamber 103 can enter the hammering piston return air chamber 102 and form impact force on the impactor assembly 2, an air release hole 602 capable of communicating the rear piston air chamber 103 and the hammering piston return air chamber 102 is designed on the cylinder block 6. During the process of compressed air entering hammer piston return air chamber 102 through bleed hole 602, the compressed air will impact mass assembly 2 to drive copper electrode 5 to move backward, eventually generating a drawing force.

Preferably, the impact body assembly 2 in this embodiment includes an impact body 201 embedded in an end portion of the cylinder block 6, one end of the impact body 201 facing the inside of the cylinder block 6 is fixedly connected with an impact body buffer rubber ring 203, and the impact body buffer rubber ring 203 is sleeved outside the copper electrode 5;

the copper electrode 5 is in threaded connection with the impact body 201;

one end of the impact body 201 facing the outer side of the cylinder block 6 is fixedly connected with an impact body return spring 202, and the impact body return spring 202 provides the impact body 201 with the reverse restoring force for the movement of the copper electrode 5;

the contact surface of the impact body 201 and the cylinder block 6 has a cylinder rear end seal rubber ring 603.

Wherein, the copper electrode 5 is arranged at one end of the rear side of the impact body component 2 and is electrically connected with the anode of an external welding power supply;

and after the welding power supply is electrified, the welding end of the copper electrode 5 is fixedly connected with the metal plate to be overhauled through welding current in a spot welding mode.

Firstly, the above embodiments are combined to know that the copper electrode 5 needs to be ensured to be fixedly connected with the concave position of the metal plate to be repaired, and then the concave position is pulled out under the action of the pulling force to achieve the repairing effect. Therefore, considering the fixed connection mode of the copper electrode 5 and the surface of the metal plate, the present embodiment adopts the spot welding and fixing mode, firstly, the copper electrode 5 can conduct electricity well, one end of the copper electrode 5, which is close to the impact body component 2, is electrically connected with the anode of the external welding power supply, once the welding power supply switch is turned on, the current is transmitted through the copper electrode 5, the welding end of the copper electrode 5 is fixed with the metal plate in the spot welding mode, so that the concave part can be pulled out when the subsequent drawing force is generated.

Preferably, in this embodiment, the hammering piston assembly 3 includes a hammering piston 301 embedded in the cylinder block 6, a hammering piston central hole is formed at an axis of the hammering piston 301, the copper electrode 5 is inserted into the hammering piston central hole, and a piston central hole sealing rubber ring 302 is installed at a connection between the hammering piston central hole of the hammering piston 301 and the copper electrode 5;

and a piston excircle sealing rubber ring 303 is arranged at the joint of the hammering piston 301 and the cylinder block 6.

The present embodiment mainly describes the structure of the hammering piston assembly 3, which includes a hammering piston 301 capable of sliding axially along the cylinder block 6, a hammering piston center hole for transmitting the copper electrode 5 is opened at the center of the hammering piston 301, and in consideration of the sealing problem after installation, a piston center hole sealing rubber ring 302 and a piston outer circle sealing rubber ring 303 are installed at the joint of the copper electrode 5 and the hammering piston 301.

Preferably, the gas exchange valve piston assembly 4 in the present embodiment comprises a gas exchange valve piston 401 embedded in the gas exchange valve air chamber 104, wherein the gas exchange valve piston 401 can slide along the gas exchange valve air chamber 104; a central hole of the gas exchange valve piston is arranged at the axis of the gas exchange valve piston 401, and the copper electrode 5 is arranged in the central hole of the gas exchange valve piston in a penetrating way;

the two ends of the scavenging valve piston 401 are respectively provided with a scavenging valve piston rear end sealing rubber ring 404 and a scavenging valve piston front end sealing rubber ring 403;

a gas exchange valve piston center sealing rubber ring 405 is arranged at the joint of the gas exchange valve piston 401 and the copper electrode 5;

the gas exchange valve piston assembly 4 further comprises a gas exchange valve body 408 assembled with the housing 1, and the gas exchange valve piston 401 is assembled in the gas exchange valve body 408 to form a gas exchange valve with the gas exchange valve body 408;

a sealing is formed between the gas exchange valve piston 401 and the gas exchange valve body 408 through a gas exchange valve piston outer circle rubber ring 406 and a gas exchange valve body center sealing ring 407;

a gas exchange valve piston 401 and a gas exchange valve piston pressure balancing spring 402 of the copper electrode 5.

Preferably, the compressed air channel in this embodiment includes a first air path 701 and a second air path 702, one end of the first air path 701 is opened at the operation portion 107, and the other end of the first air path 701 extends to the hammering air chamber 101 and is communicated with the hammering air chamber 101;

the opening of the first air passage 701 formed in the operating portion 107 communicates with an external compressed air supply device and delivers compressed air into the hammering air chamber 101;

the second air passage 702 is communicated with the first air passage 701 through the hammer switch embedded groove 704, and the second air passage 702 is communicated with the scavenging valve air chamber 104 and conveys compressed air into the scavenging valve air chamber 104.

Wherein, the hammering switch 703 is embedded in the hammering switch embedded groove 704, and the hammering switch 703 can slide along the hammering switch embedded groove 704; when hammer switch 703 slides inward along hammer switch fitting groove 704, hammer switch 703 cuts off communication between second air passage 702 and first air passage 701.

When in work:

after assembly, the rear end of copper electrode 5 is fixedly connected to impact body 201 by a screw connection, which can be retracted by impact body return spring 202.

Firstly, a power switch is pressed, a power supply outputs welding current, and a welding end 501 of a copper electrode 5 is driven to be fixedly connected with a metal plate in a spot welding mode;

pressing the hammer switch 703 again, the hammer switch 703 will cut off the communication state of the first air channel 701 and the second air channel 702, because the second air channel 702 is communicated with the air chamber 104 of the air exchange valve, once the communication state of the second air channel 702 and the first air channel 701 is cut off, the pressure in the air chamber 104 of the air exchange valve will be released, only the pressure in the hammer air chamber 101 is greater than the pressure in the air chamber 104 of the air exchange valve, the piston 401 of the air exchange valve is driven to move forward, at this time, the piston 401 of the air exchange valve, which is originally attached to the end of the cylinder block 6, will be far away from the cylinder block 6, and the front end of the cylinder block 6 and the piston 401 of the air exchange valve will no longer be sealed, the compressed air in the hammer air chamber 101 enters the front air chamber 105 of the hammer piston, which is formed by the piston 401 of the air block 6 being far away from the cylinder block 6, the hammer piston 301 will move backward rapidly under the action of the air pressure, in moving or in The piston returns to the air chamber 102 and simultaneously impacts the impact body buffer rubber ring 203, power is transmitted to the impact body 201 through the impact body buffer rubber ring 203, the impact body 201 overcomes the acting force of the elastic force of the impact body return spring 202, the copper electrode 5 is driven to move, and the primary drawing process is completed;

then, since most of the gas in the hammering air chamber 101 enters the hammering piston front air chamber 105, the compressed air cannot be supplemented to the initial pressure immediately, so that the pressure of the gas exchange valve piston pressure balance spring 402 is greater than the pressure in the hammering air chamber 101, the gas exchange valve piston 401 is driven to move backwards to seal the front end of the cylinder block 6 again, the subsequent compressed air can only be supplemented into the hammering air chamber 101, and since the gas exchange valve piston 401 moves backwards and simultaneously opens the vent hole of the gas exchange valve body 408, the gas stored in the hammering piston return air chamber 102 enters the piston rear air chamber 103 through the vent hole 602 in the rear end of the cylinder block 6 to drive the hammering piston 301 to move forwards, and the gas in the hammering piston front air chamber 105 is released into the air through the vent hole of the gas exchange valve piston 401 and then through the gas exchange valve body 408 with the vent hole opened, finally, the hammering piston 301 returns to the original position, and one drawing is finished and a second drawing preparation is made.

In the technical scheme, the utility model provides a pair of utilize compressed air to produce from hammer device of power has following beneficial effect:

the utility model discloses a self-hammering device utilizes compressed air in the air chamber to play the promotion to inside functional unit in order to produce outside drawing force, and simultaneously, copper electrode 5 utilizes the mode of spot welding to weld with the panel beating surface and fixes, strikes body subassembly 2 and hammering piston assembly 3 drive copper electrode 5 and draws to the rear after the spot welding to realize just can repairing the design purpose in panel beating depressed part from the panel beating surface;

the utility model discloses a from hammer device utilizes and strikes body return spring 202 and scavenging valve piston pressure balance spring 402 and realize drawing back copper electrode 5, strike body 201 and hammering piston 301's quick return, provides convenient condition for the arm-tie next time.

The utility model discloses a from hammer device novel structure, need not to destroy panel beating inner layer structure and just can realize panel beating outer structure depressed part, and easy operation, overall control utilizes electrode and compressed air combined action, and repairing effect is good.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims (8)

1. Utilize compressed air to produce self-hammering device from hammer power, its characterized in that includes:

a housing (1), wherein a working part (106) and an operating part (107) are formed on the housing (1), and an installation cavity is formed in the working part (106);

a cylinder block (6) integrated in the mounting chamber, the cylinder block (6) forming a working chamber therein;

a compressed air channel formed on the operating part (107), wherein a hammering switch (703) is installed on the operating part (107), and the hammering switch (703) is used for switching the communication state of the compressed air channel;

an impact body assembly (2) is integrated at one end of the working cavity, and a hammering piston assembly (3) is integrated at the other end of the working cavity;

an air chamber distributed along the circumferential direction of the cylinder body (6) is reserved between the cylinder body (6) and the shell (1);

a middle sealing rubber ring (601) of the cylinder body is fixed in the middle of the cylinder body (6) along the circumferential direction of the cylinder body, and the middle sealing rubber ring (601) of the cylinder body divides the air chamber into a hammering air chamber (101) and a hammering piston return air chamber (102);

the hammering air chamber (101) is communicated with the compressed air channel to receive externally conveyed compressed air;

a scavenging valve air chamber (104) is formed between the front end of the cylinder block (6) and the shell (1), and a scavenging valve piston assembly (4) is embedded in the scavenging valve air chamber (104);

-the gas exchange valve piston assembly (4) is slidable along the gas exchange valve air chamber (104) to close to the cylinder block (6) and form a seal with the cylinder block (6) or away from the cylinder block (6) and form a hammering piston front air chamber (105) with the cylinder block (6) by varying the air pressure in the gas exchange valve air chamber (104);

the cylinder body (6) is internally provided with a copper electrode (5) which sequentially penetrates through the impact body assembly (2), the hammering piston assembly (3) and the gas exchange valve piston assembly (4);

one end of the copper electrode (5) is fixedly connected with the impact body assembly (2) and partially extends to the rear side of the impact body assembly (2), and the other end of the copper electrode (5) extends to the outside of the shell (1);

one end of the copper electrode (5) arranged outside the shell (1) is formed into a welding end (501), and the welding end (501) is in contact with the surface of the metal plate to be overhauled;

the part of the copper electrode (5) arranged at the rear end of the impact body assembly (2) is connected with an impact body return spring (202).

2. The self-hammering device using compressed air to generate self-hammering force according to claim 1, wherein the cylinder block (6) has a hollow long cylindrical structure, and the cylinder block (6) is formed at its outer portion along its circumferential direction with two inwardly recessed annular grooves;

when the cylinder block (6) is assembled with the shell (1), the annular groove and the interior of the shell (1) form the hammering air chamber (101) and a hammering piston return air chamber (102);

an air release hole (602) which is communicated with the hammering piston return air chamber (102) and the working cavity is formed in the cylinder body (6) and is positioned in the hammering piston return air chamber (102);

the working chamber of the cylinder block (6) is formed as a piston rear air chamber (103).

3. The self-hammering device generating self-hammering force by using compressed air according to claim 2, wherein the impact body assembly (2) comprises an impact body (201) embedded in the end of the cylinder block (6), one end of the impact body (201) facing the inside of the cylinder block (6) is fixedly connected with an impact body buffer rubber ring (203), and the impact body buffer rubber ring (203) is sleeved outside the copper electrode (5);

the copper electrode (5) is in threaded connection with the impact body (201);

one end, facing the outer side of the cylinder block (6), of the impact body (201) is fixedly connected with the impact body return spring (202), and the impact body return spring (202) provides the impact body (201) with a reverse restoring force for the movement of the copper electrode (5);

the contact surface of the impact body (201) and the cylinder block (6) is provided with a cylinder rear end sealing ring (603).

4. The self-hammering device using compressed air to generate self-hammering force according to claim 3, wherein the copper electrode (5) is placed at one end of the rear side of the impact body assembly (2) and electrically connected with the positive electrode of an external welding power supply;

and after the welding power supply is electrified, the welding end of the copper electrode (5) is fixedly connected with the metal plate to be overhauled through welding current in a spot welding mode.

5. The self-hammering device utilizing compressed air to generate self-hammering force according to claim 2, wherein the hammering piston assembly (3) comprises a hammering piston (301) embedded in the cylinder block (6), a hammering piston central hole is formed in the axis of the hammering piston (301), the copper electrode (5) is arranged in the hammering piston central hole in a penetrating manner, and a piston central hole sealing rubber ring (302) is installed at the joint of the hammering piston central hole of the hammering piston (301) and the copper electrode (5);

and a piston excircle sealing rubber ring (303) is installed at the joint of the hammering piston (301) and the cylinder body (6).

6. The self-hammering device using compressed air to generate self-hammering force according to claim 2, wherein said gas exchange valve piston assembly (4) comprises a gas exchange valve piston (401) embedded in said gas exchange valve air chamber (104), said gas exchange valve piston (401) being slidable along said gas exchange valve air chamber (104);

the axis of the gas exchange valve piston (401) is provided with a gas exchange valve piston central hole, and the copper electrode (5) is arranged in the gas exchange valve piston central hole in a penetrating mode;

two ends of the scavenging valve piston (401) are respectively provided with a scavenging valve piston rear end sealing rubber ring (404) and a scavenging valve piston front end sealing rubber ring (403);

a gas exchange valve piston center sealing rubber ring (405) is arranged at the joint of the gas exchange valve piston (401) and the copper electrode (5);

the gas exchange valve piston assembly (4) further comprises a gas exchange valve body (408) assembled with the housing (1), and the gas exchange valve piston (401) is assembled in the gas exchange valve body (408) to form a gas exchange valve with the gas exchange valve body (408);

the air exchange valve piston (401) and the air exchange valve body (408) are sealed through an air exchange valve piston excircle rubber ring (406) and an air exchange valve body center sealing ring (407);

the gas exchange valve piston (401) and the copper electrode (5) are provided with a gas exchange valve piston pressure balancing spring (402).

7. The self-hammer apparatus for generating self-hammer force using compressed air according to claim 2, wherein the compressed air passage includes a first air passage (701) and a second air passage (702), the first air passage (701) having one end opened to the operating portion (107) and the other end of the first air passage (701) extending to the hammering air plenum (101) and communicating with the hammering air plenum (101);

the opening of the first air path (701) formed on the operating part (107) is communicated with external compressed air supply equipment and conveys compressed air into the hammering air chamber (101);

the second air path (702) is communicated with the first air path (701) through a hammering switch embedded groove (704), and the second air path (702) is communicated with the scavenging valve air chamber (104) and conveys compressed air into the scavenging valve air chamber (104).

8. The self-hammer apparatus using compressed air to generate self-hammer force according to claim 7, wherein the hammer switch (703) is embedded in the hammer switch embedding groove (704), and the hammer switch (703) is slidable along the hammer switch embedding groove (704);

when the hammering switch (703) slides inwards along the hammering switch embedded groove (704), the hammering switch (703) cuts off the communication between the second air passage (702) and the first air passage (701).

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