CN108342971B - Portable cement road surface breaker - Google Patents

Abstract

The invention belongs to the field of highway maintenance and repair machinery, and particularly discloses a movable cement pavement crusher, which comprises a carrying vehicle body and a crushing device, wherein the crushing device comprises a shell, a weight block, a movable rod, a conveying chain and a driving gear set, wherein the weight block, the movable rod, the conveying chain and the driving gear set are arranged in the shell; the moving rod comprises an electromagnet segment and a permanent magnet segment, both of which are hinged on the conveying chain, a ring groove with the shape completely parallel to the conveying chain is arranged on the box-type shell, a conductive layer contacting the electromagnet segment is arranged in the ring groove, and an electric insulation layer is arranged in the ring groove at the falling side of the weight block. The invention combines the gravity and the vibration acting force of the weight blocks, enlarges the primary crushing area, realizes continuous circulation work, has better crushing effect and higher crushing efficiency.

Description

A mobile cement pavement crusher

technical field

The invention relates to the field of road maintenance and repair machinery, in particular to a mobile cement pavement crusher.

Background technique

Cement concrete refers to the general designation of engineering composite materials that are made of cement, sand, stone, etc. mixed with water. It has a wide range of uses, and paving roads with cement concrete is one of the main uses of hydraulic concrete. As the service life of the road paved with cement concrete increases, its bearing capacity and strength will be further weakened. That is to say, when the hydraulic concrete pavement can no longer bear the service function at the end of its service life, it needs to be processed to construct a new pavement structure. Now the crushing process is usually used, that is, the original old cement pavement is completely broken, and it is directly used as the base or sub-base. The crushing process does not need to remove the damaged cement panels, which not only saves roadbed materials and transportation costs, but also achieves the purpose of environmental protection, energy saving and consumption reduction, speeds up the construction progress, and greatly reduces the project cost.

In the patent whose authorization notification number is CN102337722B, a pressure wheel type cement pavement vibratory crusher is disclosed. The front of the machine body is provided with a pressure wheel arm, a pressure wheel frame, a vibration mechanism installed in the pressure wheel frame and an impact hammer head. One end of the pressure wheel arm is hinged to the front of the body, the other end is hinged to the pressure wheel frame, the middle part is hinged to the beam frame of the traveling mechanism to connect the lifting cylinder, and the top of the pressure wheel frame is installed with a The heavy base is equipped with a pressure wheel placed under the impact hammer head. This invention takes advantage of the fact that the tensile and flexural strength of concrete is far lower than the compressive strength. When crushing, it first applies pressure to the concrete pavement, so that the crushed part is subjected to a shear stress, and on this basis, high-frequency vibration is applied at the same time. Vibration and crushing can be carried out with less vibration force, so that better crushing effect can be achieved with less vibration force.

Although the above-mentioned patent has achieved a good crushing effect, it still has the following disadvantages: 1. In order to apply pressure, the pressure wheel needs to contact the road surface. During the movement, the pressure wheel rolls on the road surface, and there is insufficient gravity or pressure The disadvantage of excessive wheel mass and energy consumption is that the crushing effect is relatively poor; 2. The vibration force is transmitted through the pressure wheel, and the pressure and vibration force act on the same point. The primary crushing area is relatively small, and because of the volume and mass of the pressure wheel Larger results in more transmission loss, which affects the crushing efficiency.

Contents of the invention

The purpose of the present invention is to provide a mobile cement pavement crusher, which can make maximum use of the gravity of heavy objects to crush the pavement, has a high degree of automation, can realize a continuous cycle working state, has a good crushing effect, and can improve the crushing efficiency. efficiency.

In order to achieve the above object, the basic solution of the present invention is as follows: a mobile cement pavement crusher, comprising a vehicle body and a crushing device, the crushing device is placed on the vehicle body, characterized in that the crushing device includes a box type housing and the weight block, power supply box, motor, transmission chain, first elastic member, second elastic member and driving gear set including multiple gears located on the same plane, which are located inside the box-type housing. The gear set is driven by a motor to rotate; the drive gear sets are driven by a transmission chain; a set of transmission chains and a drive gear set are respectively arranged on a set of opposite sides of the box-type housing, and the transmission chains are equally spaced as a whole A plurality of moving rods are provided; the moving rods are connected to two opposite sets of transmission chains, and the positions where the moving rods are connected to the transmission chains are installed inside the transmission chains, and the top of the weight block is hinged with a hook through the first elastic member. When the first elastic member is in the initial state, the hook is in a horizontal state, and the number of the weight blocks is not greater than the number of moving bars;

The moving rod includes an electromagnet segment and a permanent magnet segment that are magnetically attracted to each other, and the electromagnet segment and the permanent magnet segment are all connected to the conveyor chain through a second elastic member. In the initial state, the electromagnet The segment and the permanent magnet segment are kept horizontal and connected, and the side wall of the box-type housing close to the electromagnet segment is provided with a ring groove with the same shape as the pattern surrounded by the conveyor chain. The electromagnet segment One end of the segment is in contact with the inner wall of the ring groove, and the ring groove is divided into an electric insulation layer segment and a conductive layer segment; the conductive layer is connected to the power supply box through a conductive wire.

The working principle of this basic scheme is: the motor drives the sprocket to rotate around the drive gear through the drive gear set, and the sprocket fixes the heavy object through the moving rod. Among them, the moving rod is divided into an electromagnet segment and a permanent magnet segment, and an annular groove in contact with the electromagnet segment is provided on the side wall of the box-type housing, and the annular groove is further divided into a conductive layer segment and an electrical insulating layer. part. When the electromagnet is located in the conductive layer segment, the electromagnet segment is electrified to generate magnetic force and attracts the permanent magnet segment to fix the heavy object segment. When the electromagnet segment is located in the electrical insulation layer segment, the electromagnet loses power and has no magnetic force, and does not attract the segment of the permanent magnet. At this time, the weight block overcomes the elastic force of the second elastic member and falls, and the gravity of the weight block Potential energy is converted into kinetic energy to crush the road surface. The electromagnet segment and the permanent magnet segment are again in a horizontal state under the action of the second elastic member, until the electromagnet segment moves to the conductive layer segment to generate magnetic force and is connected with the permanent magnet segment. When the moving rod moves with the sprocket, the hook will be hooked again and the heavy block will be lifted to facilitate the next crushing.

The beneficial effects of this basic scheme are as follows: 1. The present invention realizes the hammering on the road surface through the free-falling heavy block, utilizes the gravity of the heavy block to the greatest extent, and combines the potential energy to do work, so as to achieve the production of The purpose of greater punching force is beneficial to reduce energy loss and promote crushing effect; and the structure is reasonable and ingenious, easy to operate and easy to apply. 2. In this scheme, the moving rod is divided into electromagnet segment and permanent magnet segment, both of which are in the horizontal state in the original state through the second elastic member, so as to ensure that the electromagnet is divided even when the electromagnet is de-energized. The segment and the permanent magnet segment can also be offset so that the electromagnet segment and the permanent magnet segment can be connected when the electromagnet is energized. 3. In the present invention, the hook is connected to the heavy object through the first elastic member. In the original state, the hook is in a horizontal state, which is convenient for the moving rod to lift the heavy object through the hook. 4. In the crushing device of the present invention, the moving rod drives several heavy objects to move periodically along the transmission chain, and the transmission chain is driven by the driving gear set, that is, only need to control the rotation of the motor to drive the driving gear set to realize the crushing of the heavy objects. Continuous cycle operation, simple control, high degree of automation, easy to apply.

Further, the drive gear set includes a driving gear connected to the motor and two longitudinally aligned driven gears that cooperate with the driving gear to form a triangle. The transition gear, the driving gear, the driven gear and the transition gear are all located in the same vertical plane, and the transmission chain once bypasses the driving gear, the driven gear, the transition gear and the driven gear. The drive gear set consists of a driving gear and two driven gears in a triangle, and a transition gear between the driving gear and the driven gear is arranged between the two driven gears. The transmission chain starts from the driving gear and bypasses the upper driven gear first. , then bypass the transition gear, and finally bypass the lower passive gear and return to the driving gear. The transmission chain is provided with several moving rods at equal intervals as a whole, and the heavy block is provided with hooks that can be hung on the moving rods. When working, the heavy block is dropped from the moving rod at the upper driven gear, and is picked up again by the moving rod at the lower driven gear, so that the cycle operation of a single heavy block can be realized, and there are more than one heavy block in the whole device. The block can make when the heavy object falling to the ground is picked up at the lower passive gear, there is just one heavy object at the upper passive gear that starts to be released and falls, so as to realize continuous hammering on the road surface; in addition, the crushing device It is installed on the vehicle body, so the present invention can realize high-density continuous crushing work while moving, further improve the crushing effect, and further improve the crushing efficiency.

Further, a limited slideway is fixed in the middle of the inner wall of the box-type housing on the side where the driven gear is located, and there is a gap between the side of the limited slideway opposite to its connection with the box-type housing and the transmission chain on the driven gear. A pair of hydraulic pistons located in the horizontal plane are fixed in the limit slideway, stoppers are provided on both sides of the weight block corresponding to the positions of the hydraulic pistons, and a weight sensor is provided on the top of the hydraulic pistons; There is a port located directly below the limit slideway, the port extends from directly below the limit slideway to the side where the driving gear is located in the length direction, and the width of the port is not less than the width of the weight block. A vibration generator that can surround the periphery of the cross-section of the weight block is provided under the end of the port located directly below the limit slideway. The upper surface of the vibration generator is installed on the lower surface of the box-type housing through a hydraulic cylinder, and the vibration occurs The lower surface of the device is provided with several rollers, and the vibration generator is connected to the transformer through conductive wires. In the present invention, a limit slideway is provided along the way of the heavy object falling, which can ensure the vertical fall of the heavy object; a vibration generator which can surround the periphery of the cross-section of the heavy object is arranged directly below the limit slideway, and the upper surface of the vibration generator passes through the The hydraulic cylinder is installed on the lower surface of the box-type housing, and the lower surface of the vibration generator is provided with a number of rollers, which can avoid the abrasion of the vibration generator by the road. When working, the heavy object falls along the limit slideway and hits the road surface, and the hydraulic cylinder drives the vibration generator to get close to the road surface under the drive of the hydraulic cylinder, and transmits the vibration to the road surface, so that the road surface around the point where the heavy object acts Resonance promotes the crushing of the cement pavement, expands the area of the primary crushed pavement, promotes the crushing effect of the cement pavement, and improves the crushing efficiency.

Further, the vehicle body includes a front control room, a carrier plate and wheels, the wheels are located at the lower end of the carrier plate and are connected to the carrier plate in rotation, and the front control room is connected to the carrier plate; the carrier plate is provided with a A fixing groove, a supporting plate is fixed below the side of the fixing groove facing the front control room, the crushing device is placed on the supporting plate, a through hole is provided on the bottom surface of the supporting plate corresponding to the opening, The bottom surface of the supporting plate is higher than the bottom of the wheel. The center of gravity of the crushing device can be lowered, which is beneficial to ensure the stability of the moving vehicle body.

Further, both the driving gear and the transition gear are located on the center line of the line connecting the centers of the two driven gears. The driving gear and the two passive gears form an isosceles triangle, and the transition gear is flush with the driving gear, so that the structure is well-proportioned and the stability of the device is easily ensured.

Further, one end of the hook connected to the heavy object is provided with a straight rod, and the moving rod located within the range of the passive gear below the transition gear can hook the hook on the heavy object after landing in the process of moving to the driving gear. Once the hook on the weight block is separated from the moving rod, under the reset action of the first elastic member, the hook is in a horizontal state. During the falling process of the heavy object, there is no obstacle in a relatively large area, so a straight rod can be directly set up to connect the hook and the heavy object, so that the hook can be hooked by the moving rod within the range of the passive gear below purpose, thereby promoting circular operation.

Further, the limiting slideway includes two oppositely arranged splints, and the weight block passes between the two splints when falling. The two splints and the side wall of the box-type housing fixed by the splint cooperate with the falling heavy block from three sides, which can meet the guiding and limiting requirements of the heavy block. At the same time, the side opposite to the box-type housing is open, which is convenient The moving rod catches the hook and pulls the weight, which in turn facilitates the circulation.

Further, the length of the transmission chain part between the two driven gears is an integer multiple of the distance between two adjacent moving rods, and the multiple is at least one. At this time, when the heavy object falling to the ground is picked up at the lower driven gear, just one heavy object at the upper driven gear starts to be released and falls, thereby realizing continuous hammering on the road surface.

Description of drawings

Fig. 1 is a schematic diagram of the external outline structure of the present invention;

Fig. 2 is a top view schematic diagram of the vehicle body;

Fig. 3 is a schematic front view of the internal structure of the crushing device;

Fig. 4 is a schematic left view of the internal structure of the crushing device;

Fig. 5 is the structural representation of ring groove;

Fig. 6 is a schematic top view of the internal structure of the crushing device;

Fig. 7 is a top view of the installation position of the vibration generator.

Detailed ways

The present invention will be described in further detail below by means of specific embodiments:

The reference signs in the accompanying drawings of the specification include: front control room 1, carrier plate 2, wheel 3, fixed groove 4, supporting plate 5, straight rod 6, splint 7, driving car body 10, box-type casing 11, weight Block 12, moving rod 13, electromagnet segment 131, permanent magnet segment 132, transmission chain 14, motor 15, driving gear 16, driven gear 17, transition gear 18, first torsion spring 19, crushing device 20, hook 21. Second torsion spring 22, ring groove 23, electrical insulation layer 24, conductive layer 25, conductive wire 26, power supply box 27, transformer 28, limit slideway 29, hydraulic piston 30, block 31, weight sensor 32 , Port 33, vibration generator 34, hydraulic cylinder 35, roller 36.

The embodiment is basically shown in Figure 1 and Figure 2: a mobile cement pavement breaker, including a vehicle body 10 and a crushing device 20, the vehicle body 10 includes a front control room 1, a carrier plate 2 and wheels 3, the wheels 3 is located at the lower end of the carrier board 2 and is rotatably connected with the carrier board 2, and the front control room 1 is connected with the carrier board 2. As shown in Fig. 3, Fig. 4 and Fig. 6, the crushing device 20 is arranged on the carrier plate 2, and the crushing device 20 includes a box-type housing 11 and a weight block 12, a moving rod 13, Transmission chain 14 and driving gear set, driving gear set includes driving gear 16 connected to motor 15 and two longitudinally aligned driven gears 17 that are surrounded by a triangle with driving gear 16, and a drive gear located between the two driven gears 17 is arranged. 16 and the transition gear 18 between the driven gear 17, the driving gear, the driven gear and the transition gear of a drive gear set are located in the same vertical plane, and the transmission chain 14 starts from the driving gear 16 and walks around one of the driven gears 17 earlier. Then go around the transition gear 18, and finally go around another driven gear 17 and get back to the driving gear 16; a set of transmission chain 14 and a drive gear set are respectively established on a group of opposite sides of the box-type housing 11, and the moving rod 13 is connected. Two sets of transmission chains 14 are arranged oppositely, and the position where the moving rod 13 is connected to the transmission chain 14 is pierced and hinged inside the transmission chain 14. The transmission chain 14 is provided with 3 to 6 moving rods 13 at equal intervals on the whole (in this embodiment Among them, there are five moving rods 13), and the top of the weight block 12 is hinged with a hook 21 matching the section diameter of the moving rod 13 through the first torsion spring 19. When the first torsion spring 19 is in the initial state, the hook 21 is in the In a horizontal state, the number of heavy objects 12 is not greater than the number of moving rods 13 (in this embodiment, 4 heavy objects 12 are provided);

As shown in Figures 4 and 6, the moving bar 13 includes an electromagnet segment 131 and a permanent magnet segment 132 that magnetically attract each other. On the chain 14, when the second torsion spring 22 is in the initial state, the electromagnet segment 131 and the permanent magnet segment 132 remain horizontal and connected, and the corresponding electromagnet segment 131 of the box-type housing 11 faces away from the permanent magnet segment 132 The side wall of one end is provided with the ring groove 23 that shape is identical with the surrounding pattern of conveyer chain 14, as shown in Figure 5, the corresponding end of electromagnet segment 131 extends to contact ring groove 23 inner walls, and ring groove 23 corresponds to The two driven gears 17 and the part between them are provided with an electrical insulating layer 24, and the inner walls of other positions of the ring groove 23 are provided with a conductive layer 25, and the conductive layer 25 is connected to the inner bottom of the box-type housing 11 through a conductive wire 26. The power supply box 27; the bottom of the box-type housing 11 is also provided with a transformer 28 connected to the power supply box 27, and the motor 15 is connected to the transformer 28 through a conductive wire 26;

As shown in Figure 3, Figure 4 and Figure 6, the middle part of the inner wall of the box-type housing 11 on the side where the driven gear 17 is located is fixed with a limit slide 29, and the limit slide 29 is connected to the opposite side of the box-type housing 11 There is a gap between the transmission chain 14 and the driven gear 17, a pair of hydraulic pistons 30 located in the horizontal plane are fixed in the limit slideway 29, and stoppers are provided at the positions corresponding to the hydraulic pistons 30 on both sides of the weight block 12 31, the top of the hydraulic piston 30 is provided with a weight sensor 32; the bottom panel of the box-type housing 11 is provided with a port 33 located directly below the limit slide 29, and the port 33 is limited in the length direction Just below the slideway 29 extends to the side where the driving gear 16 is located. The width of the opening 33 is not less than the width of the weight block 12. As shown in FIG. The bottom is provided with a vibration generator 34 that can surround the periphery of the cross section of the weight block 12. The upper surface of the vibration generator 34 is installed on the lower surface of the box-type housing 11 through a hydraulic cylinder 35. The lower surface of the vibration generator 34 is provided with Several rollers 36, the vibration generator 34 is connected to the transformer 28 through the conductive wire 26.

In this embodiment, the carrier plate 2 is provided with a fixing groove 4 behind the rear wheel 3, and a support plate 5 is fixed under the fixing groove 4 facing the side of the front control room 1, and the crushing device 20 is placed on the supporting plate 5, and the position corresponding to the opening 33 on the bottom surface of the supporting plate 5 is also hollowed out, and the bottom surface of the supporting plate 5 is higher than the bottom of the wheel 3. The center of gravity of the crushing device 20 can be lowered, which is beneficial to ensure the stability of the moving vehicle body 10 .

In this embodiment, both the driving gear 16 and the transition gear 18 are located on the center line connecting the centers of the two driven gears 17 . The driving gear 16 and the two driven gears 17 form an isosceles triangle, and the transition gear 18 is flush with the driving gear 16, so that the structure is well-proportioned and the stability of the device is guaranteed.

In this embodiment, one end of the hook 21 connected to the weight block 12 is provided with a straight rod 6, and the length of the straight rod 6 satisfies: the moving rod 13 within the range of the passive gear 17 below the transition gear 18 is in the direction The hook 21 on the weight block 12 after the landing can just be caught in the process of the driving gear 16 moving. Once the hook 21 on the weight block 12 breaks away from the moving rod 13, under the reset action of the first torsion spring 19, the hook 21 is in a horizontal state. The distance between the rods is relatively large, and there is no obstacle in a relatively large area during the falling process of the weight block 12, so the straight rod 6 can be directly set to connect the hook 21 and the weight block 12, so that the hook 21 can be moved by the bottom. The moving rod 13 within the range where the passive gear 17 is located is hooked, thereby promoting the circulation operation.

In this embodiment, the limiting slideway 29 includes two oppositely arranged splints 7 , and the weight block 12 passes between the two splints 7 when falling. The two splints 7 cooperate with the side walls of the box-type housing 11 fixed by the splint 7 to surround the falling weight block 12 from three sides, which can meet the guide limit requirements for the weight block 12. The opposite side is open, which is convenient for the moving rod 13 to hook the hook 21 to pull up the heavy object 12, thereby promoting the circulation operation.

In this embodiment, the length of the part of the transmission chain 14 between the two driven gears 17 is an integer multiple of the distance between two adjacent moving rods 13, and the multiple is at least one (in this embodiment, the multiple for two). At this time, when the heavy object 12 dropped to the ground is picked up at the lower driven gear 17, just one heavy object 12 begins to be released and falls at the upper driven gear 17, thereby realizing continuous hammering on the road surface.

The specific application process of the above mobile cement pavement crusher is as follows:

(1) Drive the vehicle body 10 to the concrete road to be crushed, set the output speed of the motor 15 so that when the heavy object 12 falls to the ground, there is just a moving rod 13 located at the lower passive gear 17, through Drive and control the hydraulic cylinder 35 to adjust the roller 36 on the bottom surface of the vibration generator 34 to attach to the road surface, then start the motor 15 and the vibration generator 34, the drive gear set starts to rotate, the transmission chain 14 starts to transmit, and the moving rod 13 carries the weight block 12 to transmit The chain 14 advances (the second torsion spring 22 is in the initial state, the electromagnet segment 131 and the permanent magnet segment 132 remain horizontal and connected, and the electromagnet segment 131 and the permanent magnet segment 132 are tightly connected under the action of magnetic attraction together, so that the moving bar 13 is enough to bear the weight of the heavy object 12 and move with the heavy object 12);

(2) When the moving rod 13 moves to the electrical insulation layer 24, the electromagnet segment 131 is powered off, and the magnetic attraction force between the permanent magnet segment 132 disappears, and the moving rod 13 cannot bear the load only by the elastic force of the first torsion spring 19. The weight of the weight block 12, at this moment, the two subsections of the moving rod 13 are all rotated downwards to separate from each other, the weight block 12 falls, and the weight is blocked by the hydraulic piston 30 in the beginning when the weight block reaches the limit slideway 29. The stopper 31 on the block 12 presses the weight sensor 32, the weight sensor 32 triggers the signal, the hydraulic piston 30 starts to shrink, and the blocking effect on the weight block 12 is released, and the weight block 12 falls along the limit slideway 29 and passes through the box type. The opening 33 on the bottom panel of the casing 11 hammers the cement pavement; at the same time, the vibration generator 34 generates vibration and transmits it to the cement pavement, so that the cement pavement around the action point of the weight block 12 resonates and breaks;

(3) After the weight block 12 is separated from the moving rod 13, the two segments of the moving rod 13 can resume the connected state under the reset action of the first torsion spring 19, and the hook 21 on the top of the weight block 12 is connected to the first torsion spring Under the reset action of 19, it is in a horizontal state; the moving rod 13 located at the lower driven gear 17 contacts the conductive layer 25 again, and the electromagnet segment 131 is electrified, and restores the magnetic connection relationship with the permanent magnet segment 132 to ensure that the weight is driven block 12, the moving rod 13 hooks the hook 21 after falling to the ground, then continues to move forward with the conveyor chain 14, and smoothly hooks up the heavy object 12, and the heavy object 12 waits for the second time to be released and falls; While the aforementioned moving rod 13 is lifting the heavy object 12, there is just one moving rod 13 at the upper passive toothed gear that loses its magnetic attraction and releases another heavy object 12 (in this embodiment, it can be set at the weight block 12 Within the falling time, the transmission chain 14 moves just to move a distance between the moving rods 13), then continuous crushing is realized.

What is described above is only an embodiment of the present invention, and common knowledge such as specific structures and characteristics known in the scheme are not described here too much. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present invention, some modifications and improvements can also be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (6)

1. The movable cement pavement crusher comprises a carrying vehicle body and a crushing device, wherein the crushing device is arranged on the carrying vehicle body, and is characterized in that the crushing device comprises a box-type shell, a weight block arranged in the box-type shell, a power supply box, a motor, a conveying chain, a first elastic piece, a second elastic piece and a driving gear set which is positioned on the same plane and comprises a plurality of gears, and the driving gear set is driven to rotate by the motor; the driving gear sets realize transmission through a transmission chain; a set of conveying chains and driving gear sets are respectively arranged on a set of opposite side surfaces of the box-type shell, and a plurality of moving rods are arranged on the conveying chains at equal intervals on the whole; the movable rod is connected with two sets of conveying chains which are oppositely arranged, the position of the movable rod, which is connected with the conveying chains, is penetrated into the conveying chains, the top end of the weight block is hinged with a hook through a first elastic piece, when the first elastic piece is in an initial state, the hook is in a horizontal state, the number of the weight blocks is not more than that of the movable rods, the driving gear set comprises a driving gear connected with a motor and two driven gears which are longitudinally aligned and are matched with the driving gear to form a triangle, a transition gear between the driving gear and the driven gear is arranged between the two driven gears, the driving gear, the driven gear and the transition gear are all positioned in the same vertical plane, and the conveying chains bypass the driving gear, the driven gear, the transition gear and the driven gear once; a straight rod is arranged at one end of the hook connected with the weight, and a moving rod positioned in the range of the driven gear below the transition gear can hook the hook on the falling weight in the process of moving to the driving gear; the bottom panel of the box-type shell is provided with a through hole positioned under the limiting slide way, the through hole extends to the side where the driving gear is positioned from the right under the limiting slide way in the length direction, and the width of the through hole is not smaller than the width of the weight;

the moving rod comprises an electromagnet segment and a permanent magnet segment which are attracted by magnetism, the electromagnet segment and the permanent magnet segment are connected to a conveying chain through a second elastic piece, in an initial state, the electromagnet segment and the permanent magnet segment are kept horizontal and connected, a ring groove with the same shape as the pattern enclosed by the conveying chain is arranged on the side wall of the box-type shell, which is close to one side of the electromagnet segment, one end of the electromagnet segment is contacted with the inner wall of the ring groove, an electric insulation layer is arranged on the part, corresponding to the two driven gears and between the two driven gears, of the ring groove, and a conductive layer is arranged on the inner wall of the other positions of the ring groove; the conductive layer section is connected with a power supply box through a conductive wire.

2. A mobile cement road surface crusher according to claim 1, characterized in that: a limit slide way is fixed in the middle of the inner wall of the box-type shell on the side where the driven gear is located, a gap exists between the side, opposite to the side where the limit slide way is connected with the box-type shell, of the limit slide way and a conveying chain on the driven gear, a pair of hydraulic pistons positioned in a horizontal plane are fixed in the limit slide way, stop blocks are arranged on the two sides of the weight block corresponding to the positions of the hydraulic pistons, and a weight sensor is arranged on the top of the hydraulic pistons; the utility model discloses a vibrating generator that the opening is located the one end below spacing slide, is equipped with the vibration generator that can surround weight piece cross section periphery, vibration generator upper surface passes through the pneumatic cylinder and installs at box casing lower surface, vibration generator lower surface is equipped with a plurality of gyro wheels, vibration generator passes through the conductor connection transformer.

3. A mobile cement road surface crusher according to claim 2, characterized in that: the motor-carrying vehicle body comprises a vehicle head control chamber, a carrier plate and wheels, wherein the wheels are positioned at the lower end of the carrier plate and are rotationally connected with the carrier plate, and the vehicle head control chamber is connected with the carrier plate; the support plate is provided with a fixing groove positioned behind the rear wheel, a support plate is fixed below one side of the fixing groove facing the vehicle head control chamber, the crushing device is arranged on the support plate, a through hole is arranged on the bottom surface of the support plate at the position corresponding to the through hole, and the bottom surface of the support plate is higher than the bottom of the wheel.

4. A mobile cement road surface crusher according to claim 1 or 3, characterized in that: the driving gear and the transition gear are both positioned on the central line of the central connecting line of the two driven gears.

5. A mobile cement road surface crusher according to claim 3, characterized in that: the limiting slide way comprises two clamping plates which are oppositely arranged, and the weight block passes through the space between the two clamping plates when falling down.

6. A mobile cement road surface crusher according to claim 4, characterized in that: the length of the transmission chain part between the two driven gears is an integral multiple of the distance between the two adjacent movable rods, and the multiple is at least one.

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