CN114986448B - Electronic stepless hammer force adjusting hand-held air hammer - Google Patents

Abstract

The invention provides an electronic stepless hammer force adjusting handheld air hammer which comprises an upper cover plate, a hammer body, an upper sealing plate, a one-way valve, an inner sleeve, a piston, a lower positioning block, a hammer head, an anchor rod connecting hammer head, a pneumatic-electric proportional pressure reducing valve and an air source. The initial piston is in the down position. The high-pressure gas supplied by the gas source is steplessly regulated by an electrically-controlled regulating gas-electric proportional pressure reducing valve, and the hammering air pressure is selected, namely the hammering force. From upper cover plate gas passage, the manual switch pneumatic valve gets into the check valve and reaches the upper sealing plate, gets into cavity between hammer block and inner skleeve through the gas channel in the upper sealing plate, get into the piston bottom from inner skleeve lower gas pocket, lower annular groove, piston lower gas pocket, the piston upward movement, move the back up, inner skleeve lower gas pocket is sealed by the piston, tail pipe disconnection on piston center air flue and the tup, high-pressure gas gets into the piston top from inner skleeve upper gas pocket and upper annular groove, piston upper gas pocket simultaneously, the upward movement piston compresses rapidly with high-pressure gas, promote the piston to descend fast, form a hammering.

Description

A hand-held air hammer with electronic stepless adjustment of hammering force

technical field

The invention relates to a self-locking bolt hammering and opening construction device for bolt wedges during construction. Construction work where it is necessary to ensure that the hammering force can be adjusted.

Background technique

With the application of reaming self-locking anchor technology in various industries more and more widely, reaming self-locking anchors have been widely used, and there is a key process in the reaming self-locking anchor construction process, reaming self-locking anchor wedge expansion, reaming self-locking The size of the bolt wedge expansion directly determines the size of the bolt force and determines the quality of the bolt construction. The traditional self-locking bolt wedge expansion adopts the scheme of hammer hammering. There are many uncertain factors in this scheme: the size of the hammer, the physical strength of the construction personnel, the force used when hammering, etc., and the construction efficiency is low and the risk is high. big. In order to ensure the standardization and standardization of expansion of self-locking anchor wedges for reaming, a hand-held air hammer with electronically adjustable hammering force is now developed, which has high construction efficiency, standardized expansion of self-locking anchor wedges, and safe construction.

Contents of the invention

In view of this, the present invention proposes a hand-held air hammer whose hammering force can be electronically adjusted steplessly, which can hammer the wedge of the reaming self-locking anchor rod according to the specification requirements, ensuring the expansion standardization of the reaming self-locking anchor rod wedge, with It has high construction efficiency, reliable expansion quality and safe construction.

The technical solution of the present invention is achieved as follows: the present invention provides a hand-held air hammer whose hammering force can be electronically adjusted steplessly, including an upper cover plate, a hammer body, a one-way valve, an upper sealing plate, a hammer body, an inner Sleeve, piston, lower positioning block, hammer head, anchor rod connecting hammer head, gas-electric proportional pressure reducing valve, air source.

Among them, there is a handle inside the upper cover, and an air inlet passage is arranged inside the handle, and the manual valve is arranged on the air inlet passage. The upper cover is provided with bolt holes evenly distributed around the circumference, which can be tightly connected and sealed with the pituitary. The air hole is connected with the air inlet channel in the handle and the air inlet hole of the one-way valve.

The one-way valve core is set as a tapered surface, and the lower part is set with a guide rod. The guide rod is inserted into the central axis hole of the upper sealing plate.

The upper sealing plate is threadedly connected with the hammer body, the central axis is provided with a one-way valve guide hole, and the peripheral edge is provided with an air passage connected to the lower part. The lower surface is pressed against the upper surface of the inner sleeve and sealed. The lower central axis is provided with a lower tail Tube.

The hammer body is set as a hollow cylinder, the upper part is provided with an upper cover plate to connect bolt holes, the upper sealing plate is threaded to connect the inner wire, the lower positioning block is threaded to connect the inner wire, the lower end of the hammer body is provided with a circlip groove, and a circlip is installed.

The inner sleeve is set in a hollow cylindrical shape, with an open circular groove in the middle part, the lower part of the cylinder is matched with the lower part of the hammer body with high precision, and the upper part of the cylinder is matched with the upper part of the hammer body with high precision and is provided with evenly distributed circumferential gaps, which can be used with The hammer body forms a cavity, and air holes are evenly distributed around the upper and lower parts of the circumferential groove.

The piston is set in a hollow cylindrical shape, placed in the cavity of the inner sleeve, and can slide freely in the lower cavity of the hammer body. Two circumferential grooves are set, and the upper and lower circumferential groove shoulders are provided with The air passages respectively communicate with the upper and lower surfaces of the piston.

The lower positioning block is set as a hollow cylinder, and the outer wire is arranged on the surface of the cylinder, and the wire mouth is matched with the inner wire of the hammer, and presses and seals against the lower surface of the inner sleeve.

The hammer head is set as a cylinder, which can slide freely in the lower cavity of the hammer body. The upper tail pipe is set at the central axis of the upper part, and the lower part is set as a stepped cylinder. Circumferential air holes are set on the surface and communicate with the middle circumferential air passage, and ring-shaped grooves are set on the axis of the bottom.

The hammer head connected to the anchor rod is set as a cylinder, and an annular groove is set at the bottom axis of the installation and hammer head, and an inner wire is set at the middle axis. The inner wire is set with different specifications, and can be connected with self-locking anchor rods of different specifications.

The working gas provided by the gas source passes through the gas-electric proportional pressure reducing valve for stepless pressure regulation by pneumatic electric control. It enters from the air hole in the handle of the upper cover plate, the manual valve is opened, and reaches the inlet of the one-way valve, and then goes to the upper sealing plate through the one-way valve. The upper part enters the cavity formed by the inner sleeve and the hammer body through the air channel set on the peripheral edge of the upper sealing plate. At this time, the upper air hole is blocked by the upper shoulder of the piston, and the lower air hole communicates with the lower annular groove of the piston. The pipe is inserted into the center hole of the piston and sealed. The lower part of the piston forms a closed space, which can push the piston upward. Covered by the lower shoulder of the piston, the upper air hole communicates with the upper ring groove of the piston, and the lower tailpipe of the upper sealing plate is inserted into the center hole of the piston to seal it. The upper part of the piston forms a closed space, and the piston moves upward to meet the pressure air, forming a rapid compression , high pressure is generated, the piston starts to descend at a high speed, hammers the hammer head, and the hammer head strikes the anchor rod connecting hammer head, which can expand the reaming self-locking anchor rod connected with the anchor rod connecting hammer head.

On the basis of the above technical solution, preferably, the inner sleeve is set in a hollow cylindrical shape, the middle part is open to the circular groove, the lower part of the cylinder is matched with the lower part of the hammer body with high precision, and the upper part of the cylinder is matched with the upper part of the hammer body with high precision In addition, there are evenly distributed circumferential gaps, which can form a cavity with the hammer body, and air holes are evenly distributed circumferentially on the upper and lower parts of the circumferential groove.

Further, preferably, the piston is set in a hollow cylindrical shape, placed in the cavity of the inner sleeve, and can slide freely in the cavity of the inner sleeve, and two circumferential grooves are provided, and the upper circumferential groove shoulder and the lower circumferential groove The groove shoulders are respectively provided with air passages connected with the upper and lower surfaces of the piston, the upper circumferential groove can communicate with the upper end surface, and the lower circumferential groove can communicate with the lower end surface.

Further, preferably, the upper sealing plate is threadedly connected with the hammer body, the central axis is provided with a one-way valve guide hole, and the guide hole can ensure that the one-way valve core slides along the axis line, and the peripheral edge is provided with an air passage that communicates with the lower part , to ensure that the outer circumference of the upper surface and the lower surface are connected, the lower surface is pressed against the upper surface of the inner sleeve and sealed, and the lower tailpipe is set at the central axis of the lower part. When the lower tailpipe is inserted into the central hole of the piston, the central hole of the piston can be Sealing is carried out, the lower tail pipe is separated from the central hole of the piston, and the upper end surface of the piston is connected with the atmosphere.

Further, preferably, the hammer head is set as a cylinder, which can slide freely in the lower cavity of the hammer body, and an upper tail pipe is arranged at the upper central axis. When the upper tail pipe is inserted into the piston center hole, the piston center hole can be sealed. When said The upper tail pipe is separated from the central hole of the piston, and the upper end surface of the piston is connected with the atmosphere.

Further, preferably, the inner sleeve is set in a hollow cylindrical shape, the middle part is provided with a circular groove, and the upper part of the cylinder is provided with uniformly distributed circular gaps, which can form a cavity with the hammer body, and the cavity can be connected with the one-way valve. The outlet is connected, and air holes are uniformly distributed in the upper and lower parts of the circumferential groove. Cooperating with the piston, the upper air hole of the circumferential groove is blocked by the upper shoulder of the piston, the lower air hole communicates with the lower annular groove of the piston or the lower air hole is blocked by the lower shoulder of the piston, and the upper air hole is blocked by the lower piston shoulder. The working condition that the air hole communicates with the upper circumferential groove of the piston.

Compared with the prior art, the present invention has the following beneficial effects:

The invention discloses a hand-held air hammer whose hammering force can be electronically adjusted steplessly. Open the valve, go to the entrance of the one-way valve, pass through the one-way valve to the part of the upper sealing plate, pass through the air channel set on the peripheral edge of the upper sealing plate, enter the inner sleeve and the hammer body and form a cavity, at this time the upper air hole is closed by the piston. The shoulder is covered, the lower air hole communicates with the lower ring groove of the piston, the upper tail pipe of the hammer head is inserted into the center hole of the piston and sealed, and the lower part of the piston forms a closed space, which can push the piston upward. Disengaged from the central hole of the piston, the lower part of the piston communicates with the atmosphere. At the same time, the lower air hole is blocked by the lower shoulder of the piston, and the upper air hole communicates with the upper ring groove of the piston. The lower tailpipe of the upper sealing plate is inserted into the central hole of the piston and sealed. The upper part of the piston forms a closed space, the piston moves up and meets the pressure air, forming rapid compression, generating high pressure, the piston starts to descend at a high speed, and hammers the hammer head, and the hammer head strikes the hammer head connected to the anchor rod, which can be connected with the anchor rod. The rod is connected to the reaming self-locking anchor rod connected to the hammerhead.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a hand-held air hammer for electronic stepless regulation of hammering force disclosed by the present invention;

Fig. 2 is a schematic diagram of the structure of the hand-held air hammer piston for electronic stepless adjustment of hammering force disclosed by the present invention when the piston is in the upper position.

Fig. 3 is a construction schematic diagram of a hand-held air hammer with electronic stepless adjustment of hammering force disclosed by the present invention

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

As shown in Figure 1, with reference to accompanying drawings 2 and 3, the embodiment of the present invention discloses a hand-held air hammer whose hammering force can be electronically adjusted steplessly. The technical solution of the present invention is achieved in this way: the present invention provides A hand-held air hammer whose hammering force can be electronically adjusted steplessly, including an upper cover plate 1, a hammer body 2, a one-way valve 3, an upper sealing plate 4, an inner sleeve 5, a piston 6, a lower positioning block 7, a hammer Head 8, anchor rod connection hammer head 9, gas-electric proportional pressure reducing valve 10, gas source S.

Wherein the upper cover plate 1 is provided with a handle, the handle is provided with an air intake channel, the manual valve 13 is arranged on the air intake channel 12, and the upper cover plate has bolt holes 11 uniformly distributed around the circumference, which can be tightly connected and sealed with the pituitary gland 2, and The central axis of the cover plate 1 is provided with an air hole which is connected to the air intake passage in the handle and the air intake hole of the check valve 3

The hammer body 2 is set as a hollow cylinder, the upper part is provided with an upper cover plate 1 to connect bolt holes, the upper cover plate 1 is threaded to connect the inner wire, the lower positioning block is threaded to connect the inner wire, and the lower end of the hammer body is provided with a circlip groove to install a circlip 22.

The valve core 31 of the one-way valve 3 is set as a conical surface, and a guide rod is set on the lower part. The guide rod is inserted into the central axis guide hole 41 of the upper sealing plate 4 .

The upper sealing plate 4 is threadedly connected with the hammer body 2, the central axis is provided with a one-way valve guide hole 41, and the peripheral edge is provided with an air channel 42 connected to the lower part, the lower surface is pressed against the upper surface of the inner sleeve and sealed, and the central axis of the lower part is The lower tailpipe 43 is set at the place.

The inner sleeve 5 is set in a hollow cylindrical shape, with an open ring groove 51 in the middle part, the lower part of the cylinder is matched with the lower part of the hammer body 2 with high precision, and the upper part of the cylinder is matched with the upper part of the hammer body 2 with high precision and is provided with a uniform circumferential direction. The gap can form a cavity with the hammer body, and the upper and lower air holes 52 and 53 are evenly distributed circumferentially on the upper and lower parts of the circumferential groove.

The piston 6 is set in a hollow cylindrical shape, placed in the cavity of the inner sleeve 5, and can slide freely in the cavity at the lower part of the hammer body 2, and two circumferential grooves are set, the upper circumferential groove 62, the lower circumferential groove 63, and the upper The shoulder of the annular groove 62 is provided with an air passage 61 through which the upper surface of the piston passes, and the shoulder of the lower annular groove 63 is provided with an air passage 64 respectively connected with the lower surface of the piston. The central axis is provided with a through hole 65,

The lower positioning block 7 is set to a hollow cylindrical shape, and an outer wire is arranged, and the wire mouth cooperates with the inner wire of the hammer body 2, and presses against the lower surface of the inner sleeve 5 and seals it.

The hammer head 8 is set as a cylinder, which can slide freely in the lower cavity of the hammer body 8. The upper tail pipe 81 is set at the central axis of the upper part, the lower part is set as a stepped cylinder, the middle axis is set as a through hole 82, and the middle circumferential direction is uniformly arranged. The air channel 83 is provided with a circumferential air hole 84 on the lower surface and communicates with the middle circumferential air channel 83 , and an annular groove is provided at the axis of the bottom.

Anchor rod connection hammer head 9 is set as a cylinder, an annular groove is set at the bottom axis of the installation and hammer head, and an inner wire is set at the middle axis. According to different specifications of the inner wire of the self-locking anchor rod, self-locking anchors of different specifications can be connected. pole.

The gas-electric proportional pressure reducing valve 10 can adjust the control current, thereby adjusting the air pressure at the outlet of the gas-electric proportional pressure reducing valve 10 to adjust the pressure of the source S1, and setting the working air pressure for the air hammer to realize hammering control.

The working gas provided by the gas source S1 passes through the gas-electric proportional pressure reducing valve 10 for stepless pressure regulation. It enters from the air hole in the handle of the upper cover plate 1, the manual valve 13 is opened, and enters the inlet of the check valve 3, and passes through the check valve 3. To the upper part of the upper sealing plate 4, through the air channel 42 provided on the peripheral edge of the upper sealing plate, it enters the inner sleeve 5 and the hammer body 2 to form a cavity 51. At this time, the upper air hole 52 is blocked by the upper shoulder of the piston 6, and the lower air hole 53 communicates with the lower annular groove 63 of the piston 6. The upper tail pipe 81 of the hammerhead is inserted into the central hole 65 of the piston and sealed. The lower part of the piston 6 forms a closed space, which can push the piston 6 to move upward. Pipe 81 is disengaged from piston central hole 65, and the lower part of piston 6 communicates with the atmosphere. At the same time, lower air hole 53 is blocked by the lower shoulder of piston 6, upper air hole 52 communicates with piston upper annular groove 62, and the lower tail pipe 43 of the upper sealing plate is inserted. The central hole 65 of the piston is sealed, and the upper part of the piston 6 forms a closed space. The piston 6 moves up and encounters the pressure air, forming rapid compression and generating high pressure. Just knocking on the anchor rod connecting tup 9 can expand the reaming self-locking anchor rod S2 connected with the anchor rod connecting tup.

When the manual valve 13 is closed, the working gas source is disconnected, the piston 6 is placed in the lower position and the hammering is stopped.

By adjusting the gas-electric proportional pressure reducing valve 10 to control the current, the air pressure at the outlet of the gas-electric proportional pressure reducing valve 10 can be adjusted to realize the adjustment of the intake pressure and set the working air pressure for the air hammer to realize hammering control.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (6)

1. A hand-held air hammer with electronic stepless adjustment of hammering force, including an upper cover plate, a hammer body, a one-way valve, an upper sealing plate, a hammer body, an inner sleeve, a piston, a lower positioning block, a hammer head, and an anchor rod Connect the hammer head, gas-electric proportional pressure reducing valve, and gas source; Among them, there is a handle inside the upper cover, and an air inlet passage is arranged inside the handle, and the manual valve is arranged on the air inlet passage. The upper cover is provided with bolt holes evenly distributed around the circumference, which can be tightly connected and sealed with the hammer body. There is an air hole connected to the air intake channel in the handle and the air intake hole of the one-way valve; The one-way valve core is set as a tapered surface, and the lower part is provided with a guide rod, which is inserted into the central axis hole of the upper sealing plate; The upper sealing plate is threadedly connected with the hammer body, the central axis is provided with a one-way valve guide hole, and the peripheral edge is provided with an air passage connected to the lower part. The lower surface is pressed against the upper surface of the inner sleeve and sealed. The lower central axis is provided with a lower tail Tube; The hammer body is set in a hollow cylindrical shape, the upper part is provided with the upper cover plate connecting bolt hole, the inner wire connected with the upper sealing plate, the lower positioning block is threaded with the inner wire, the lower end surface of the hammer body has a spring groove, and a retaining spring is installed; The inner sleeve is set in a hollow cylindrical shape, with an open circular groove in the middle part, the lower part of the cylinder is matched with the lower part of the hammer body with high precision, and the upper part of the cylinder is matched with the upper part of the hammer body with high precision and is provided with evenly distributed circumferential gaps, which can be used with The hammer body forms a cavity, and air holes are evenly distributed around the upper and lower parts of the circumferential groove; The piston is set in a hollow cylindrical shape, placed in the cavity of the inner sleeve, and can slide freely in the lower cavity of the hammer body. Two circumferential grooves are set, and the upper and lower circumferential groove shoulders are provided with The air passages respectively connected with the upper and lower surfaces of the piston; The lower positioning block is set as a hollow cylinder, and the outer wire is arranged on the outside, and the wire mouth is matched with the inner wire of the hammer, and pressed against the lower surface of the inner sleeve and sealed; The hammer head is set as a cylinder, which can slide freely in the lower cavity of the hammer body. The upper tail pipe is set at the central axis of the upper part, and the lower part is set as a stepped cylinder. Circumferential air holes are set on the surface and communicate with the middle circumferential air passage, and ring-shaped grooves are set on the axis of the bottom; The bolt connection hammer head is set as a cylinder, the installation and the bottom axis of the hammer head are provided with a ring-shaped groove, and the middle axis is provided with an inner wire. The inner wire is set with different specifications, and can be connected with different specifications of the self-locking anchor rod outer wire; The control current can be adjusted to adjust the air pressure at the outlet of the gas-electric proportional pressure reducing valve to adjust the pressure of the air source, and to set the working air pressure for the air hammer to achieve hammering control. 2. The hand-held air hammer with electronic stepless adjustment of hammering force as claimed in claim 1, characterized in that: the upper cover plate is provided with a hand-held handle, and the handle is provided with a manual valve to control the on-off of the air intake passage, and the work of the air hammer is related to The stop is controlled by a manual valve, and the intake air pressure is regulated by the air source pressure gas-electric proportional pressure reducing valve, which can be infinitely adjusted for air pressure. 3. The hand-held air hammer with electronic stepless adjustment of hammering force as claimed in claim 1, the upper sealing plate is threadedly connected with the hammer body, the central axis is provided with a one-way valve guide hole, and the peripheral edge is provided with an air passage through the lower part , the lower surface is pressed against the upper surface of the inner sleeve and sealed. The upper sealing plate realizes the internal isolation of the external air supply of the inner sleeve. When the lower tailpipe is inserted into the central shaft hole of the piston, it can seal the central shaft hole of the piston. 4. The hand-held pneumatic hammer with electronic stepless adjustment of hammering force as claimed in claim 1, characterized in that: the upper and lower cylinders of the inner sleeve cooperate with the lower part of the hammer body with high precision, and the upper part of the inner sleeve is provided with uniformly distributed The circumferential notch is an air hole, and a circumferential groove is set in the middle part, and air holes are uniformly distributed in the upper and lower parts of the circumferential groove. When the grooves are connected, the piston can be pushed upwards, and the upper air hole is blocked by the upper shoulder of the piston; when the upper air hole communicates with the upper ring groove of the piston, the piston can be pushed downward, and the lower air hole is blocked by the lower shoulder of the piston. 5. The hand-held air hammer with electronic stepless adjustment of hammering force as claimed in claim 1, characterized in that: the piston is set as a hollow cylinder, which can slide freely in the lower cavity of the hammer body, and when the piston is in the lower position, the hammer head The upper tailpipe is inserted into the center hole of the piston and sealed. The lower air hole of the inner sleeve communicates with the lower ring groove of the piston. The upper air hole of the inner sleeve is blocked by the upper shoulder of the piston. The cavity communicates with the atmosphere, and at the same time, the lower air hole of the inner sleeve is blocked by the lower shoulder of the piston. The upper air hole of the inner sleeve communicates with the upper ring groove of the piston. When the displacement meets the pressure air, rapid compression is formed, high pressure is generated, and the piston starts to hammer down at high speed. 6. The hand-held pneumatic hammer with electronic stepless adjustment of hammering force as claimed in claim 1, characterized in that: the hammer head is set as a cylinder, the upper central axis is set with an upper tail pipe, the lower part is set as two steps, and the middle axis The through hole and the piston are hollow butted, the air passages are evenly distributed in the middle circumferential direction, the circumferential air holes are provided on the lower surface and communicate with the middle circumferential air passage, and the bottom axis is provided with a ring-shaped groove, and the anchor rod is connected to the hammer head. Hammering is installed on the self-locking anchor rod connected to the hammer head of the anchor rod, and the anchor rods of different specifications are equipped with different specifications of the anchor rod connected to the hammer head.

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