CN213114236U - Roller type rotary roughening mechanism - Google Patents

Abstract

Roller-type rotatory chisel hair mechanism, relate to engineering machine tool technical field, this roller-type rotatory chisel hair mechanism includes motor and chisel hair roller, pass through gear drive between motor and the chisel hair roller, the interval is provided with multirow U-shaped support on the outer peripheral face of chisel hair roller, every row of U-shaped support all arranges along the axis direction of chisel hair roller, the U-shaped support includes the auricle that two parallel intervals set up, be provided with the hammer sword between two auricles of U-shaped support, the hammer sword is articulated through the axis pin and the auricle that is located its both sides, the auricle still retrains the hammer sword through locking and canceling release mechanical system, it rotates together and makes the front end chisel of hammer sword strike the concrete face to drive the hammer sword when chisel hair roller rotates. Due to the fact that the hammer cutter is locked, the roller type rotary chiseling mechanism is high in construction efficiency, meanwhile, deeper chiseling point depth can be obtained, and meanwhile, the operation stability of the chiseling mechanism is better.

Description

Roller type rotary roughening mechanism

Technical Field

The utility model relates to an engineering machine tool technical field, in particular to rotatory chisel hair mechanism of roller formula.

Background

The bonding quality of the new and old concrete interfaces is greatly influenced by the interface roughness, and the old concrete interfaces are generally required to be roughened in order to ensure the interface bonding strength of the new and old concrete interfaces. In addition, in the bridge deck pavement, although the concrete bridge deck is subjected to a napping process in the pavement construction process, the surface layer floating slurry is difficult to remove thoroughly, and if the floating slurry is not removed thoroughly, the cement concrete and the asphalt concrete are difficult to combine firmly, so that the bridge construction specification requires that before the bridge deck is subjected to waterproof treatment, the cement concrete bridge deck is subjected to napping treatment.

The traditional roughening machine generally adopts an air pick as a roughening mechanism, the air pick is connected with an air compressor, high-pressure air generated by the air compressor is used for driving the air pick to roughen concrete, the roughening area generated by the air pick is small, and the work efficiency is low.

Chinese patent document CN2871628Y discloses a three-point suspension type cement road surface chiseling machine, in which a chiseling roller (equivalent to a chiseling mechanism) of the chiseling machine is provided with a hammer head capable of rotating 360 degrees, and when the chiseling roller rotates, the hammer head strikes a cement ground surface under the action of centrifugal force, thereby achieving chiseling operation on a cement concrete road surface. Compared with the traditional air pick roughening, the working efficiency of the roughening mechanism is greatly improved, but the following defects still exist in the actual use process: 1. the chisel point area is small. 2. Because the hammer head is unloaded instantly after impacting the surface of the cement concrete, the time for the hammer head to continuously apply acting force to the surface of the cement concrete is too short, and the depth of a chisel point is shallow. 3. The chisel hair roller rotation in-process, the tup rotates around long round pin roller, and the position constantly changing of tup leads to the focus of whole chisel hair roller constantly to change, and the chisel hair roller is irregular beats obviously, can't realize dynamic balance, and the operating stability of chisel hair mechanism is relatively poor.

SUMMERY OF THE UTILITY MODEL

One of the objectives of the present invention is to provide a roller-type rotary roughening mechanism capable of obtaining deeper chiseling points and having more stable operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a roller type rotary chiseling mechanism comprises a motor and a chiseling roller, wherein the motor and the chiseling roller are in gear transmission, a plurality of rows of U-shaped supports are arranged on the outer peripheral surface of the chiseling roller at intervals, each row of U-shaped supports are arranged along the axis direction of the chiseling roller, each U-shaped support comprises two lug plates which are arranged in parallel at intervals, a hammer cutter is arranged between the two lug plates of each U-shaped support, the hammer cutter is hinged with the lug plates positioned on two sides of the hammer cutter through a pin shaft, the lug plates further restrict the hammer cutter through a locking and resetting mechanism, and the chiseling roller drives the hammer cutter to rotate together when rotating and enables the front end of the hammer cutter to chisel a concrete surface;

locking and canceling release mechanical system include the locking round pin and with locking round pin matched with arc wall, locking round pin and arc wall separately set up on the lateral wall of auricle and the lateral wall of hammer sword, the tank bottom surface of arc wall is one by going to inclined plane or the cambered surface of back gradual lifting, make and go more shallow its degree of depth in the rear end of arc wall the tank bottom of arc wall initiating end is equipped with a depressed part, the rear end of locking round pin supports and leans on an elastomeric element, will hammer sword locking in the front end of locking round pin inserts the depressed part, locking round pin front end contacts and has at least one contact surface in the contact surface of the two to be domatic with the lateral wall contact of depressed part.

The output shaft of the motor is connected with a transmission shaft through a quincunx elastic coupling, and the transmission ratio of a driving gear connected with the transmission shaft to a driven gear connected with the chiseling roller is less than 1: 1, the transmission shaft is also connected with a flywheel serving as an energy storage.

Further, the side face of the hammer cutter is in an olecranon shape, a pin hole is formed in the rear end of the hammer cutter, the pin shaft penetrates through the pin hole and enables the hammer cutter to be hinged with the lug piece, the thickness of the front end of the hammer cutter is gradually reduced, a protruding main cutting edge is arranged on the front face of the hammer cutter, two inclined faces are arranged on two sides of the main cutting edge respectively, the two inclined faces are intersected and form the main cutting edge at the intersection of the two inclined faces, a protruding auxiliary cutting edge is arranged on the back face of the hammer cutter, two inclined faces are arranged on two sides of the auxiliary cutting edge respectively, the two inclined faces are also intersected and form the auxiliary cutting edge at the intersection of the two inclined faces, and the main cutting edge and the auxiliary cutting edge both extend backwards from the front.

Preferably, the locking and resetting mechanism is structured as follows: the utility model discloses a hammer cutter, including auricle, hammer sword, locking pin, elastic component, coil spring, lock pin, spiral spring, jackscrew, it has the shoulder to open on the lateral wall of auricle, set up the arc wall on the lateral wall face of hammer cutter, the auricle is transversely run through to the shoulder, the rear end of locking pin is equipped with the anticreep step, the locking pin sets up in the shoulder and its front end wears out and inserts in the arc wall from the aperture of shoulder, the anticreep step is located the macropore of shoulder and its diameter is less than the aperture diameter of shoulder, elastic component is coil spring, coil spring installs in the macropore of shoulder and its front end supports and leans on the anticreep step of locking pin coil spring's rear side is equipped with the jackscrew, the jackscrew withstands coil spring's rear end with.

Also preferably, the front end of the locking pin is provided with a spherical cap-shaped or conical leading-in head, the concave part is a round hole, and the leading-in head is only partially inserted into the round hole.

The working process of the roller type rotary roughening mechanism is as follows: the motor is started, the motor drives the roughening roller to rotate, the roughening roller drives the hammer cutter to rotate in the lump, the locking pin and the arc-shaped groove are matched to lock the hammer cutter in the rotating process, and in the roughening operation process, the hammer cutter in an idle state (namely the hammer cutter not in contact with the concrete bridge deck) is restrained by the locking mechanism and the reset mechanism and is fixed in position relative to the roughening roller. For the hammer cutter which is used for chiseling concrete, when the chiseling depth is shallow, the force of the concrete reacting on the hammer cutter (the reaction force can cause the hammer cutter to rotate around a pin shaft which is hinged with a lug plate) is less than the locking force, the hammer cutter cannot rotate around the pin shaft, namely the position of the hammer cutter relative to a chiseling roller does not change, but the reaction force exerted on the hammer cutter by the concrete is increased along with the increase of the chiseling depth, when the reaction force is greater than the locking force of a locking and resetting mechanism on the hammer cutter, the hammer cutter rotates around the pin shaft and pushes the locking pin to withdraw from the concave part, in the process of rotating the hammer cutter around the pin shaft, the interference area between the hammer cutter and the concrete is gradually reduced, meanwhile, the front end of the locking pin abuts against the groove bottom of the arc-shaped groove and gradually moves towards the rear end of the arc-shaped groove along with the rotation of the hammer cutter, in the process of moving the locking pin towards the rear end of the arc-shaped groove, because the, the bottom surface of the arc-shaped groove pushes the locking pin to further retract backwards, so that the elastic component is further compressed, when the hammer cutter rotates to a position completely separated from concrete, the reaction force of the concrete on the hammer cutter disappears, at the moment, the reset force applied to the hammer cutter by the locking and resetting mechanism (namely, the component force formed by the pressure applied to the bottom surface of the groove by the front end of the locking pin and used for pushing the hammer cutter to rotate reversely) is larger than the force for rotating the hammer cutter around the pin shaft (at the moment, the reaction force of the concrete on the hammer cutter is zero), the hammer cutter rotates reversely around the pin shaft, and along with the reverse rotation of the hammer cutter, the locking pin gradually moves to the starting end of the arc-shaped groove, is inserted into the concave part again under the pushing of the elastic force of the elastic component and locks the hammer cutter. The hammer cutter rotating along with the chiseling roller continuously chisels cement concrete to achieve chiseling operation on the concrete surface.

Compared with the roughening mechanism in the aforementioned documents, the roller-type rotary roughening mechanism provided by the present invention has the following advantages: 1. carry out the locking through locking round pin and arc wall cooperation to the hammer sword, avoided also constantly rotating and lead to the constantly condition that changes of focus at chisel hair roller pivoted in-process hammer sword very big degree, alleviateed the irregular problem of beating when chisel hair mechanism operates greatly, the dynamic balance effect of chisel hair mechanism has had obvious promotion, and the operating stability of chisel hair mechanism is better. 2. Because the hammer cutter is locked, the hammer cutter cannot unload instantly after impacting the cement concrete bridge floor, and the time for the hammer cutter to continuously apply acting force to the cement concrete is greatly prolonged, the relatively deeper depth of the scabbling point can be obtained, and the depth of the scabbling point can be adjusted by adjusting the locking force (namely adjusting the elastic force applied by the elastic component).

Drawings

Fig. 1 is a schematic view of the overall structure of the roller-type rotary roughening mechanism of the present invention.

Fig. 2 is a schematic front structure diagram of a chisel roller with a hammer blade.

Fig. 3 is a schematic front structure diagram of the roughening roller.

Fig. 4 is a side view of the hammer blade.

Fig. 5 is a partially enlarged view of a portion a in fig. 3.

Fig. 6 is a schematic view of the rotation process of the U-shaped support and the hammer blade when the drilling depth is relatively shallow.

Fig. 7 is a schematic view of the rotation process of the U-shaped support and the hammer blade when the drilling depth is relatively deep.

In the figure:

1-motor 2-chiseling roller 4-hammer cutter

6-quincunx elastic coupling 7-transmission shaft 8-flywheel

2 a-U-shaped support 4 a-pin hole 4 b-main cutting edge

4c auxiliary blade 5a locking pin 5b arc groove

5c elastic component 5d jackscrew 3a driving gear

3 b-driven gear 2a 1-lug 5a 1-anti-falling step

5b 1-recess.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Fig. 1 shows an overall structure of a roller type rotary roughening mechanism, as shown in fig. 1, the roller type rotary roughening mechanism includes a motor 1 and a roughening roller 2, the motor 1 and the roughening roller 2 are driven by a gear, a plurality of rows of U-shaped supports 2a are arranged on an outer circumferential surface of the roughening roller 2 at intervals, each row of U-shaped supports 2a is arranged along an axial direction of the roughening roller 2, as shown in fig. 2 and 3, the U-shaped supports 2a include two lugs 2a1 arranged in parallel at intervals, a hammer blade 4 is arranged between two lugs 2a1 of the U-shaped supports 2a, the hammer blade 4 is hinged to the lugs 2a1 located on two sides of the hammer blade 4 through a pin, the lugs 2a1 further constrain the hammer blade 4 through a locking and resetting mechanism, and the roughening roller 2 drives the hammer blade 4 to rotate together when rotating and enables a front end of the hammer blade 4 to chisel a concrete surface.

As shown in fig. 3 to 5, the locking and resetting mechanism includes a locking pin 5a and an arc-shaped groove 5b matched with the locking pin 5a, the locking pin 5a and the arc-shaped groove 5b are separately disposed on the side wall of the tab 2a1 and the side wall of the hammer blade 4, the groove bottom surface of the arc-shaped groove 5b is an inclined surface or an arc surface which gradually rises from front to back, so that the depth of the arc-shaped groove 5b is shallower towards the rear end of the arc-shaped groove 5b, a recessed portion 5b1 is disposed at the groove bottom of the starting end of the arc-shaped groove 5b, the rear end of the locking pin 5a abuts against an elastic member 5c, the front end of the locking pin 5a is inserted into the recessed portion 5b1 to lock the hammer blade 4, the front end of the locking pin 5a contacts with the side wall of the recessed portion 5b1, and at least one contact.

Specifically, in the locking and resetting mechanism shown in fig. 3 to 5, a stepped hole is formed in the side wall of the tab 2a1, an arc-shaped groove 5b is formed in the side wall surface of the hammer blade 4, the stepped hole transversely penetrates through the tab 2a1, an anti-falling step 5a1 is provided at the rear end of the locking pin 5a, the locking pin 5a is disposed in the stepped hole, the front end of the locking pin 5a penetrates out of a small hole of the stepped hole and is inserted into the arc-shaped groove 5b, the anti-falling step 5a1 is located in a large hole of the stepped hole, the diameter of the anti-falling step 5a1 is smaller than that of the small hole of the stepped hole, the elastic member 5c is a coil spring, the coil spring is mounted in the large hole of the stepped hole, the front end of the coil spring abuts against the anti-falling step 5a1 of the locking pin 5a, a jackscrew 5d is further provided at the rear. As is apparent from the figure, the locking and resetting mechanism has a very simple and compact structure, and has high working reliability in practical application. In addition, in the locking and returning mechanism of the above structure, the elastic force applied to the locking pin 5a by the elastic member 5c (i.e., the locking force) can be adjusted by adjusting the depth to which the jackscrew 5d is screwed into the stepped hole, and the operation is very simple.

The whole working process of the locking and resetting mechanism can be divided into three steps: firstly, the hammer knife 4 is unlocked. When an external force for rotating the hammer blade 4 in the normal direction around the pin shaft hinged to the tab 2a1 is applied to the hammer blade 4, the applied external force is transmitted to the locking pin 5a through the slope surface at the contact position of the front end of the locking pin 5a and the concave part 5b1, a component force pushing the locking pin 5a to retract is formed, when the component force is larger than the elastic force applied to the locking pin 5a by the elastic component 5c, the locking pin 5a retracts and retreats from the concave part 5b1, and the hammer blade 4 is unlocked. Secondly, the hammer cutter 4 is reset. When the hammer blade 4 rotates around the pin shaft, the elastic component 5c pushes the rear end of the locking pin 5a and presses the front end of the locking pin 5a against the bottom surface of the arc-shaped groove 5b, the locking pin 5a moves towards the rear end of the arc-shaped groove 5b along with the rotation of the hammer blade 4, meanwhile, the pressure applied to the bottom surface of the groove by the front end of the locking pin 5a is gradually increased, a component force for pushing the hammer blade 4 to rotate reversely is formed by the pressure applied to the bottom surface of the groove by the front end of the locking pin 5a and the gradually raised bottom surface of the groove, when the component force is greater than the acting force applied to the hammer blade 4 and promoting the hammer blade to rotate forwards around the pin shaft, the hammer blade 4 rotates reversely, and the locking pin 5a moves towards the starting end of the. Thirdly, the hammer knife 4 is locked again. After the hammer blade 4 returns to the initial position, the locking pin 5a is inserted into the recessed portion 5b1 again by the urging of the elastic member 5c, and the hammer blade 4 is locked again.

The chiseling working process of the roller type rotary chiseling mechanism is as follows: starting motor 1, motor 1 drives chisel hair roller 2 and rotates, and chisel hair roller 2 takes hammer cutter 4 to rotate in the lump, rotates in-process locking pin 5a and arc wall 5b cooperation and carries out the locking to hammer cutter 4, and among the chisel hair operation process, hammer cutter 4 (not the hammer cutter 4 who contacts with the concrete promptly) that is in idle state receives locking and canceling release mechanical system restraint, and its rigidity for chisel hair roller 2. In the case of the hammer blade 4 which is chiseling concrete, as shown in fig. 6, when the chiseling depth is shallow, the force of the concrete reacting on the hammer blade 4 (the reaction force may cause the hammer blade 4 to rotate around the pin) is smaller than the locking force, and the hammer blade 4 will not rotate around the pin, that is, the position of the hammer blade 4 relative to the chisel roller 2 is not changed. However, as the drilling depth increases, as shown in fig. 7, the reaction force exerted on the hammer blade 4 by the concrete increases, when the reaction force is greater than the locking force of the locking and resetting mechanism on the hammer blade 4, the hammer blade 4 will rotate around the pin shaft and push the locking pin 5a to withdraw from the recess 5b1, the interference area between the hammer blade 4 and the concrete gradually decreases during the rotation of the hammer blade 4 around the pin shaft, when the hammer blade 4 rotates to the position completely separated from the concrete, the reaction force of the concrete on the hammer blade 4 disappears, at this time, the resetting force exerted on the hammer blade 4 by the locking and resetting mechanism (i.e. the component force formed by the pressure exerted on the bottom surface of the groove by the front end of the locking pin 5 a) is greater than the force for rotating the hammer blade 4 around the pin shaft (at this time, the reaction force exerted on the hammer blade 4 by the concrete is zero), the hammer blade 4 rotates reversely around the pin shaft, and as the hammer blade 4 rotates reversely, the locking pin 5a gradually moves to the starting end of the arc-shaped groove 5b and is inserted into the recess 5b1 again under the urging force of the elastic member 5c and locks the hammer blade 4. The hammer 4 rotating along with the roughening roller 2 continuously chisels the cement concrete to form chiseling points on the cement concrete surface.

Compared with the roughening mechanism in the background art document, the roller-type rotary roughening mechanism has the following advantages: 1. carry out the locking to hammer sword 4 through locking round pin 5a and arc wall 5b cooperation, avoided also constantly rotating and lead to the constantly condition that changes of focus at 2 pivoted in-process hammer sword 4 of chiseling roller to very big degree, alleviateed the problem of the irregular beating of chiseling mechanism during operation greatly, the dynamic balance effect of chiseling mechanism has had obvious promotion. 2. Because the hammer knife 4 is locked, the hammer knife 4 cannot unload instantly after impacting the cement concrete, and the time for the hammer knife 4 to continuously apply acting force to the cement concrete is greatly prolonged, relatively deeper scabbling point depth can be obtained, and the scabbling point depth can be adjusted by adjusting the locking force (namely adjusting the elastic force applied by the elastic component 5 c).

Further, as shown in fig. 4, in the above-mentioned roughening mechanism, the side surface of the hammer blade 4 is shaped like a eagle beak, and the rear end of the hammer blade 4 is provided with a pin hole 4a, and a pin shaft passes through the pin hole 4a and hinges the hammer blade 4 and the tab 2a 1. The advantage that hammer sword 4 global design becomes olecranon shape is can make its focus be closer to the round pin axle, locking and reset mechanism just can be more easily with hammer sword 4 locking, the required reset power of exerting is also littleer when promoting it to reset simultaneously, adopt behind the olecranon shape design, the focus of hammer sword 4 also is more close to in the axle center of chiseling roller 2, when hammer sword 4 rotates, the focus that its position change formed to chiseling roller 2 and the combination of hammer sword 4 influences littleer, stability when chiseling mechanism moves is better, it is littleer to beat. In addition, the front end of the hammer blade 4 is gradually thinned, a convex main blade 4b is arranged on the front surface of the hammer blade 4, two sides of the main blade 4b are respectively provided with an inclined surface, the two inclined surfaces are intersected and form the main blade 4b at the intersection, and the main blade 4b extends backwards from the front end of the hammer blade 4. After the main blade 4b is formed by the two intersecting inclined surfaces on the front surface of the hammer blade 4, the hammer blade 4 can dig into cement concrete more easily like a coulter, and the crushing area of the cement concrete is larger under the compression of the two inclined surfaces, so that a larger digging area can be obtained. Furthermore, a convex secondary blade 4c is arranged on the back of the hammer blade 4, two sides of the secondary blade 4c are respectively provided with an inclined surface, the two inclined surfaces are also intersected and form a secondary blade 4c at the intersection, and the secondary blade 4c also extends backwards from the front end of the hammer blade 4. When the chisel depth is deep and the reaction force applied by the cement concrete on the hammer blade 4 causes the hammer blade 4 to rotate (see fig. 7), the secondary blade 4b can easily crush the cement concrete on the back of the hammer blade 4, so that the chisel point area is further enlarged on the premise of full chisel depth.

More specifically, in the roughening mechanism shown in fig. 1, an output shaft of a motor 1 is connected with a transmission shaft 7 through a quincunx elastic coupling 6, the transmission ratio of a driving gear 3a connected with the transmission shaft 7 to a driven gear 3b connected with the roughening roller 2 is larger than 1, and a flywheel 8 serving as an energy accumulator is further connected to the transmission shaft 7. On the surface, compared with the rigid direct connection, the quincunx elastic coupling 6 adopted in the drawing to connect the output shaft of the motor 1 with the transmission shaft 7 can cause partial transmission efficiency loss, but can greatly reduce the impact of chiseling vibration on the output shaft and the rotor of the motor 1, and better ensure the service life of the motor 1. It should be noted that, during the chiseling operation, the hammer blade 4 is intermittently contacted with the cement concrete, the intermittent impact load acts on the chiseling roller 2, which causes the resistance force received during the rotation of the chiseling roller 2 to periodically change, if the frequently changing resistance force is directly transmitted to the motor 1, the motor load will generate high-frequency variation, if the motor 1 can not rapidly adjust the output power according to the load change, the chiseling roller 2 will possibly generate the surge due to the power lag, meanwhile, the high-frequency varying load will bring adverse effect to the service life of the motor 1, the transmission ratio of the driving gear 3a and the driven gear 3b is designed to be larger than 1, the resistance force transmitted to the transmission shaft 7 through the driven gear 3b and the driving gear 3a when the hammer blade 4 chiseling the concrete can be reduced, the fluctuation range of the load is reduced, and simultaneously, by arranging the flywheel 8 on the transmission shaft 7, when the load increases, the kinetic energy stored by the flywheel 8 is released, so that the influence of load fluctuation on the motor 1 is further reduced, and the long-term stable operation of the chiseling mechanism is ensured.

Finally, the aforementioned embodiment in which at least one of the contact surfaces of the locking pin 5a and the recessed portion 5b1 is a slope surface can be implemented as shown in fig. 5, specifically, a spherical or conical leading head is provided at the front end of the locking pin 5a, and correspondingly, the recessed portion 5b1 is a circular hole into which the leading head is only partially inserted. Of course, it should be understood by those skilled in the art that the ramp surface is not limited to the illustrated spherical crown surface, but may be a gradually rising curved surface or a tapered surface.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.

Claims (5)

1. Roller type rotary chiseling mechanism comprises a motor (1) and a chiseling roller (2), and is characterized in that: the motor (1) and the roughening roller (2) are in gear transmission, a plurality of rows of U-shaped supports (2 a) are arranged on the outer peripheral surface of the roughening roller (2) at intervals, each row of U-shaped supports (2 a) are arranged along the axis direction of the roughening roller (2), each U-shaped support (2 a) comprises two lug plates (2 a 1) which are arranged in parallel at intervals, a hammer cutter (4) is arranged between the two lug plates (2 a 1) of each U-shaped support (2 a), the hammer cutter (4) is hinged with the lug plates (2 a 1) positioned on two sides of the hammer cutter through a pin shaft, the lug plates (2 a 1) further restrict the hammer cutter (4) through a locking and resetting mechanism, and the roughening roller (2) drives the hammer cutter (4) to rotate together when rotating and enables the front end of the hammer cutter (4) to chisel a concrete surface;

the locking and resetting mechanism comprises a locking pin (5 a) and an arc-shaped groove (5 b) matched with the locking pin (5 a), the locking pin (5 a) and the arc-shaped groove (5 b) are separately arranged on the side wall of the lug plate (2 a 1) and the side wall of the hammer blade (4), the bottom surface of the arc-shaped groove (5 b) is an inclined surface or an arc surface which is gradually lifted from front to back, so that the depth of the arc-shaped groove is shallower towards the back end of the arc-shaped groove (5 b), a concave part (5 b 1) is arranged at the bottom of the starting end of the arc-shaped groove (5 b), the rear end of the locking pin (5 a) abuts against an elastic member (5 c), the front end of the locking pin (5 a) is inserted into the recessed portion (5 b 1) to lock the hammer blade (4), the front end of the locking pin (5 a) is contacted with the side wall of the depressed part (5 b 1), and at least one contact surface of the two contact surfaces is a slope surface.

2. The roller rotary roughening mechanism according to claim 1, wherein: the output shaft of the motor (1) is connected with a transmission shaft (7) through a quincunx elastic coupling (6), the transmission ratio of a driving gear (3 a) connected with the transmission shaft (7) to a driven gear (3 b) connected with the hair-chiseling roller (2) is greater than 1, and the transmission shaft (7) is further connected with a flywheel (8) serving as an energy accumulator.

3. A roller rotary roughening mechanism according to claim 1 or 2, wherein: the side of the hammer cutter (4) is in a shape of an olecranon, a pin hole (4 a) is formed in the rear end of the hammer cutter (4), the pin shaft penetrates through the pin hole (4 a) and enables the hammer cutter (4) to be hinged with a lug (2 a 1), the thickness of the front end of the hammer cutter (4) is gradually reduced, a raised main cutting edge (4 b) is arranged on the front side of the hammer cutter (4), two inclined planes are arranged on two sides of the main cutting edge (4 b) respectively, the two inclined planes are intersected and form the main cutting edge (4 b) at the intersection position of the two inclined planes, a raised auxiliary cutting edge (4 c) is arranged on the back side of the hammer cutter (4), two inclined planes are arranged on two sides of the auxiliary cutting edge (4 c) respectively and are also intersected and form the auxiliary cutting edge (4 c) at the intersection position of the two inclined planes, and the main cutting edge (4 b) and the auxiliary cutting edge (4 c) extend backwards from the front end of the.

4. A roller rotary roughening mechanism according to claim 1 or 2, wherein: the side wall of the lug plate (2 a 1) is provided with a stepped hole, the side wall surface of the hammer knife (4) is provided with an arc-shaped groove (5 b), the stepped hole transversely penetrates through the lug plate (2 a 1), the rear end of the locking pin (5 a) is provided with an anti-falling step (5 a 1), the locking pin (5 a) is arranged in the stepped hole, the front end of the locking pin penetrates out of the small hole of the stepped hole and is inserted into the arc-shaped groove (5 b), the anti-falling step (5 a 1) is positioned in the big hole of the stepped hole and has a diameter smaller than the small hole of the stepped hole, the elastic component (5 c) is a spiral spring which is arranged in the large hole of the stepped hole, the front end of the spiral spring abuts against an anti-falling step (5 a 1) of the locking pin (5 a), the rear side of the spiral spring is provided with a jackscrew (5 d), the jackscrew (5 d) is in threaded connection with the large hole of the stepped hole, and the front end of the jackscrew props against the rear end of the spiral spring.

5. A roller rotary roughening mechanism according to claim 1 or 2, wherein: the front end of the locking pin (5 a) is provided with a spherical cap-shaped or conical leading-in head, the concave part (5 b 1) is a round hole, and the leading-in head is only partially inserted into the round hole.

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