rock breaking bar

Abstract

The utility model relates to a kind of rock breaking rods, it includes: including main body and hammer head, main body is covered with flexible layer outside, main body is equipped with movable cavity inside, movable cavity is arranged close to the bottom end of main body, several movable members are filled in movable cavity, and movable member can freely move in movable cavity. Hammer head is located below main body, and is connected with the bottom end of main body. Inertial motion of movable member can absorb and offset part of kinetic energy that bounces back to rock breaking rod, so as to significantly reduce rock breaking rod echo, improve rock breaking effect. Movable member shakes in movable cavity can significantly reduce the vibration of rock breaking rod and the intensity of high-frequency noise radiated outward, so as to be conducive to ecological environmental protection. Flexible layer covered outside main body buffers the vibration of main body, and reduces the noise propagated outward by main body. Therefore, the rock breaking rod can reduce the adverse effects of energy bouncing back to rock breaking rod.

Description

Technical Field

[0001] This utility model relates to the field of rock crushing tools, and more specifically, to a rock crushing rod. Background Technology

[0002] With the growing global awareness of environmental protection, traditional blasting methods are prohibited in ecologically sensitive areas or densely built-up waters, leading to the adoption of rock-breaking rods for underwater rock-breaking operations. Rock-breaking rods, as specialized tools for environmentally friendly underwater rock-breaking, function primarily to break rocks mechanically. However, when a rock-breaking rod strikes rock, some energy rebounds back onto the rod. This rebound energy causes the rod to vibrate, affecting the breaking effect. Furthermore, the energy is primarily dissipated through vibration, and the vibration and noise generated can interfere with the behavior of marine life, which is detrimental to ecological protection. Utility Model Content

[0003] The purpose of this invention is to provide a rock-breaking rod, which solves the technical problem of how to reduce the adverse effects of energy rebounding back into the rock-breaking rod.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] This utility model provides a rock crushing rod, comprising: a main body covered with a flexible layer, a movable cavity provided inside the main body, the movable cavity being arranged near the bottom end of the main body, a plurality of movable parts being filled in the movable cavity, and the movable parts being able to move freely within the movable cavity; and a hammer head located below the main body and connected to the bottom end of the main body.

[0006] In some embodiments of this application, the movable cavity is cylindrical extending from bottom to top, and the movable element is spherical.

[0007] In some embodiments of this application, the flexible layer is made of polyurea coating.

[0008] In some embodiments of this application, the hammer head is detachably connected to the bottom end of the body.

[0009] In some embodiments of this application, the rock-crushing rod further includes a connecting seat located between the body and the hammer head, and detachably connected to the bottom end of the body and the hammer head respectively, so that the hammer head is detachably connected to the bottom end of the body.

[0010] In some embodiments of this application, the bottom surface of the connecting seat and the top surface of the hammer head are respectively provided with mounting grooves and mounting posts. There are a plurality of mounting grooves, and the number of mounting posts is the same as the number of mounting grooves. Each mounting post is inserted and fixed in each mounting groove so that the connecting seat and the hammer head are detachably connected.

[0011] In some embodiments of this application, the mounting groove is disposed on the bottom surface of the connecting seat and includes a first mounting groove; a receiving groove communicating with the first mounting groove is formed on the top surface of the connecting seat; the rock-crushing rod also includes a nut, which is located in the receiving groove; the mounting post is disposed on the top surface of the hammer head and includes a first mounting post with external threads, which passes through the first mounting groove to extend into the receiving groove and forms a screw connection with the nut to be inserted and fixed in the first mounting groove.

[0012] In some embodiments of this application, the mounting groove further includes a second mounting groove, the depth of which is greater than the depth of the first mounting groove; the mounting post further includes a second mounting post, the height of which is greater than the height of the first mounting post, the second mounting post extending into the second mounting groove and forming an interference fit with the second mounting groove to be inserted and fixed in the second mounting groove; the second mounting groove of each mounting groove is centrally arranged on the bottom surface of the connecting seat, the first mounting groove of each mounting groove is spaced around the second mounting groove of each mounting groove, the second mounting post of each mounting post is centrally arranged on the top surface of the hammer, and the first mounting posts of each mounting post are spaced around the second mounting posts of each mounting post.

[0013] In some embodiments of this application, the top surface of the connecting seat and the bottom surface of the main body are respectively provided with connecting posts and connecting grooves. The connecting posts and connecting grooves are arranged in groups, and several groups are provided. The connecting posts in each group of connecting posts and connecting grooves are inserted and fixed in the connecting grooves so that the connecting seat is detachably connected to the bottom end of the main body. The connecting posts and connecting grooves in each group are arranged at intervals around the movable cavity.

[0014] In some embodiments of this application, there are a plurality of hammerheads, which are arranged horizontally side by side; the number of movable cavities is the same as the number of hammerheads, which are arranged horizontally side by side and respectively correspond to the upper and lower parts of each hammerhead.

[0015] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects:

[0016] In this embodiment of the rock-crushing rod, the rock-crushing rod falls under gravity and approaches the rock. At the moment the hammer impacts the rock, the main body decelerates instantly, while the moving parts within the active cavity continue to move under inertia. The inertial motion of the moving parts absorbs and offsets part of the kinetic energy rebounding back to the rock-crushing rod, thereby significantly reducing the rock-crushing rod's rebound and improving the rock-crushing effect. Subsequently, the moving parts sway within the active cavity. This swaying prolongs the duration of the rebound impact force, reducing the peak rebound force. Furthermore, collisions occur between the moving parts or between the moving parts and the cavity wall. These collisions disperse the originally concentrated high-frequency impact energy into multi-frequency energy and partially convert it into internal frictional heat, thereby significantly reducing the vibration of the rock-crushing rod and the intensity of outward-radiated high-frequency noise, which is beneficial to environmental protection. Further, the flexible layer covering the main body buffers the vibration of the main body and reduces the noise propagating outward from the main body. Therefore, this rock-crushing rod can reduce the adverse effects of energy rebounding back to the rock-crushing rod. Attached Figure Description

[0017] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0018] Figure 1 This is a front view of a rock-crushing rod according to an exemplary embodiment.

[0019] Figure 2 yes Figure 1 Side view.

[0020] Figure 3 yes Figure 1 A schematic diagram of its decomposed structure.

[0021] Figure 4 yes Figure 2 A schematic diagram of the decomposed structure in the image.

[0022] Figure 5 yes Figure 1 Top view of the main body.

[0023] Figure 6 yes Figure 1 The connecting seat in the middle is shown in a three-dimensional view from an upward angle.

[0024] Figure 7 yes Figure 6 Top view.

[0025] Figure 8 yes Figure 1 A 3D view of the hammerhead.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Main body; 11. Movable cavity; 12. Movable component; 13. Connecting groove;

[0028] 2. Hammer head; 21. Mounting post; 211. First mounting post; 212. Second mounting post;

[0029] 3. Connecting seat; 31. Mounting slot; 311. First mounting slot; 312. Second mounting slot; 32. Receiving slot; 33. Connecting post;

[0030] 4. Nuts. Detailed Implementation

[0031] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0032] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0033] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0034] Currently available rock-breaking tools have 20%-30% of their energy rebounding back to the equipment during operation, which can easily damage the mechanical structure. The peak impact sound pressure can reach 190-210dB, causing noise pollution. Moreover, only about 35%-50% of the impact energy is converted into effective crushing work, thus limiting energy efficiency.

[0035] Please see Figures 1 to 4 The rock-crushing rod provided in one embodiment of this utility model mainly includes a main body 1 and a hammer head 2. The main body 1 is covered with a flexible layer, and a movable cavity 11 is provided inside the main body 1. The movable cavity 11 is arranged near the bottom end of the main body 1, and a number of movable parts 12 are filled in the movable cavity 11, and the movable parts 12 can move freely within the movable cavity 11. The hammer head 2 is located below the main body 1 and is connected to the bottom end of the main body 1.

[0036] In this embodiment of the rock-crushing rod, the rock-crushing rod falls under gravity and approaches the rock. At the moment the hammer 2 impacts the rock, the main body 1 decelerates instantly, and the movable component 12 inside the movable cavity 11 continues to move under inertia. The inertial movement of the movable component 12 can absorb and offset part of the kinetic energy rebounding back to the rock-crushing rod, thereby significantly reducing the rock-crushing rod's rebound and improving the rock-crushing effect. Subsequently, the movable component 12 oscillates within the movable cavity 11. The oscillation of the movable component 12 can prolong the action time of the rebound impact force to reduce the peak rebound force. Furthermore, collisions occur between the movable components 12 or between the movable component 12 and the cavity wall of the movable cavity 11. These collisions disperse the originally concentrated high-frequency impact energy into multi-frequency energy and partially convert it into internal frictional heat, thereby significantly reducing the vibration of the rock-crushing rod and the intensity of the high-frequency noise radiated outward, which is beneficial to ecological and environmental protection. Furthermore, the flexible layer covering the main body 1 buffers the vibration of the main body 1 and reduces the noise propagated outward from the main body 1. Therefore, this rock-breaking rod can reduce the adverse effects of energy rebounding back to the rock-breaking rod.

[0037] It is conceivable that the flexible layer covering the main body 1 can also reduce the direct rigid collision between the main body 1 and the outside world, play a buffering role in protecting the main body 1, and improve the comfort of operation.

[0038] It is conceivable that by providing a movable cavity 11 within the main body 1, and setting a freely movable component 12 within the movable cavity 11, in addition to the aforementioned technical effects of improving rock crushing effect and being beneficial to ecological and environmental protection, it can also reduce damage to its own structure, thereby increasing its service life.

[0039] It should be noted that the movable part 12 can move freely within the movable cavity 11, indicating that the movable cavity 11 is not completely filled by the movable part 12. The filling rate can be 30% to 80%, and in the preferred embodiment, the filling rate is between 65% and 70%.

[0040] Please see Figure 3 and Figure 4 In a specific embodiment, the movable cavity 11 is cylindrical, extending from bottom to top, and the movable component 12 is spherical. The extending direction of the movable cavity 11 is consistent with the movement direction of the rock-crushing rod, ensuring that the path of the inertial motion of the movable component 12 is collinear with the direction of the rebound impact force, thus ensuring the absorption and cancellation effect. The spherical movable component 12 can roll or slide freely within the cylindrical movable cavity 11, ensuring the energy dispersion effect.

[0041] In this embodiment, the movable component 12 is a steel ball or a lead ball. Steel balls have advantages such as high wear resistance and high strength, while lead balls have the advantage of high plasticity. Preferably, the movable cavity 11 has a size of 250*2000mm, and the steel ball or lead ball has a size of 10-20mm.

[0042] In a specific embodiment, the flexible layer is made of polyurea coating.

[0043] On the one hand, polyurea coatings have high damping properties and high elasticity. When the rock crusher tipped and collided with the rock, the flexible layer could convert some of the mechanical vibration into heat energy through internal friction, reducing the structural vibration transmitted to the surrounding water and thus suppressing secondary underwater noise sources. The high elasticity of polyurea can also effectively absorb the high-frequency impact energy in rock crushing operations, reduce stress fatigue in the rock itself, and prevent crack propagation or fracture, thereby improving the overall impact resistance of the rock crusher.

[0044] On the other hand, polyurea coatings have excellent wear resistance and corrosion resistance. The wear resistance coefficient of polyurea coatings is 5 to 10 times that of carbon steel. It can resist repeated friction from seabed sand and rock fragments, reduce the risk of peeling, and can isolate the penetration of seawater, chloride ions and sulfides, avoiding electrochemical corrosion on rock fragments. It is especially suitable for high-salt and high-pressure deep-sea environments.

[0045] On the other hand, the rock crushing rod is made of metal substrate. The bonding strength between polyurea and metal substrate (such as high-strength steel and stainless steel) can reach more than 10MPa. Even if it is soaked for a long time, it can still maintain adhesion and is not easy to bubble or fall off.

[0046] Finally, the buffering effect of polyurea coating can reduce cavitation intensity, reduce local cavitation bubbles caused by violent collisions, and the flexible layer can buffer the rigid collisions at the moment of impact, making energy release more gradual and reducing high-frequency noise peaks.

[0047] In a specific embodiment, the hammer head 2 is detachably connected to the bottom end of the main body 1. As a vulnerable component in the rock-crushing rod, the hammer head 2 can be detached from the main body 1 for individual replacement as needed, which can effectively reduce maintenance costs.

[0048] Please see Figures 1 to 4 In a specific embodiment, the rock-crushing rod also includes a connecting seat 3, which is located between the main body 1 and the hammer head 2, and is detachably connected to the bottom end of the main body 1 and the hammer head 2 respectively, so that the hammer head 2 is detachably connected to the bottom end of the main body 1.

[0049] The connecting seat 3 serves as a connecting structure between the main body 1 and the hammer head 2, which can reduce the possibility of stress being directly transmitted from the hammer head 2 to the main body 1, causing both to be damaged at the same time. Furthermore, if the connection part is damaged, the connecting seat 3 itself can be directly replaced, thereby further reducing maintenance costs.

[0050] Please see Figures 3 to 8In a specific embodiment, the bottom surface of the connecting seat 3 and the top surface of the hammer head 2 are respectively provided with mounting grooves 31 and mounting posts 21. There are a number of mounting grooves 31, and the number of mounting posts 21 is the same as the number of mounting grooves 31. Each mounting post 21 is inserted and fixed in each mounting groove 31 so that the connecting seat 3 and the hammer head 2 can be detachably connected.

[0051] The direct cooperation of multiple mounting posts 21 and multiple mounting slots 31 achieves multi-point positioning connection, which can effectively disperse stress and avoid connection failure due to excessive force at a single connection point. This improves the connection stability and reliability between the connecting seat 3 and the hammer head 2. Furthermore, the connection between the connecting seat 3 and the hammer head 2 through the mounting posts 21 and mounting slots 31 also makes the overall structure more compact.

[0052] In a specific embodiment, the mounting groove 31 is provided on the bottom surface of the connecting seat 3 and includes a first mounting groove 311. A receiving groove 32 communicating with the first mounting groove 311 is provided on the top surface of the connecting seat 3. The rock-crushing rod also includes a nut 4, which is located within the receiving groove 32. The mounting post 21 is provided on the top surface of the hammer head 2 and includes a first mounting post 211 with external threads. The first mounting post 211 passes through the first mounting groove 311 to extend into the receiving groove 32 and forms a threaded engagement with the nut 4 to be inserted and fixed within the first mounting groove 311. The threaded connection has the advantages of reliable connection and ease of assembly and disassembly.

[0053] It is conceivable that the number of the first mounting slot 311, the first mounting post 211, the receiving slot 32, and the nut 4 are the same, and they are set in groups.

[0054] In a specific embodiment, the mounting groove 31 further includes a second mounting groove 312, the depth of which is greater than the depth of the first mounting groove 311. The mounting post 21 also includes a second mounting post 212, the height of which is greater than the height of the first mounting post 212. The second mounting post 212 extends into the second mounting groove 312 and is interference-fitted with the second mounting groove 312 for insertion and fixation within the second mounting groove 312. The second mounting groove 312 of each mounting groove 31 is centrally located on the bottom surface of the connecting seat 3, and the first mounting grooves 311 of each mounting groove 31 are spaced apart around the second mounting grooves 312 of each mounting groove 31. The second mounting post 212 of each mounting post 21 is centrally located on the top surface of the hammer head 2, and the first mounting posts 211 of each mounting post 21 are spaced apart around the second mounting posts 212 of each mounting post 21.

[0055] During assembly, first bring the hammer head 2 close to the connecting seat 3, align the first mounting post 211 with the first mounting groove 311, and the second mounting post 212 with the second mounting groove 312. Pushing the hammer head 2 towards the connecting seat 3 causes the first mounting post 211 to pass through the first mounting groove 311 and enter the receiving groove 32, while the second mounting post 212 extends into the second mounting groove 312. Through the interference fit between the second mounting post 212 and the second mounting groove 312, the initial positioning and stable connection of the central part are completed. Then, tighten the nut 4 on the portion of the first mounting post 211 located in the receiving groove 32. The nut 4 is used to prevent the first mounting post 211 from dislodging from the first mounting groove 311, further reinforcing the connection between the connecting seat 3 and the hammer head 2, thus ultimately achieving reliable fixing of the connecting seat 3 and the hammer head 2.

[0056] Please see Figure 3 and Figure 8 In this embodiment, the first mounting post 211 of each mounting post 21 is arranged on both sides of the second mounting post 212 of each mounting post 21.

[0057] It should be noted that in other embodiments, the depth relationship between the first mounting groove 311 and the second mounting groove 312 and the height relationship between the first mounting post 211 and the second mounting post 212 can be interchanged synchronously, and the positions of the first mounting groove 311 and the second mounting groove 312 and the first mounting post 211 and the second mounting post 212 can be interchanged synchronously. All the above interchange embodiments should be included in the protection scope of this application.

[0058] Please see Figures 3 to 7 In a specific embodiment, the top surface of the connecting seat 3 and the bottom surface of the main body 1 are respectively provided with connecting posts 33 and connecting grooves 13. The connecting posts 33 and connecting grooves 13 are arranged in groups, and there are several groups. The connecting posts 33 in each group of connecting posts 33 and connecting grooves 13 are inserted and fixed in the connecting grooves 13 so that the connecting seat 3 and the bottom end of the main body 1 can be detachably connected. The connecting posts 33 and connecting grooves 13 are arranged at intervals around the movable cavity 11.

[0059] On the one hand, the connecting columns 33 and mounting grooves 31 are arranged in groups, and several groups are provided, which can realize multi-point positioning connection to effectively disperse stress and avoid connection failure due to excessive force at a single connection point, thereby improving the connection stability and reliability between the connecting seat 3 and the hammer head 2. On the other hand, the arrangement of each group of connecting columns 33 and connecting grooves 13 around the movable cavity 11 can make full use of the space around the movable cavity 11, which not only makes the overall structure of the rock crusher more compact, but also allows the kinetic energy rebounding from the hammer head 2 to be evenly applied to the movable cavity 11 through the connecting seat 3, thereby ensuring that the fit between the movable cavity 11 and the movable part 12 can function stably and effectively.

[0060] Please see Figures 5 to 7 In this embodiment, the connecting posts 33 and connecting grooves 13 are distributed on both horizontal sides of the movable cavity 11. In a further embodiment, the connecting posts 33 and connecting grooves 13 distributed on both horizontal sides of the movable cavity 11 can be one, two, or more groups. When there is one group of connecting posts 33 and connecting grooves 13, the group of connecting posts 33 and connecting grooves 13 is located on the centerline of the movable cavity 11. When there are two groups, the two groups of connecting posts 33 and connecting grooves 13 are symmetrically distributed with the centerline of the movable cavity 11 as the axis. The same applies when there are multiple groups.

[0061] The top surface of the connecting seat 3 and the bottom surface of the main body 1 are respectively provided with a connecting post 33 and a connecting groove 13. The arrangement can be such that the connecting post 33 is provided on the top surface of the connecting seat 3 and the connecting groove 13 is provided on the bottom surface of the main body 1, or the connecting post 33 is provided on the bottom surface of the main body 1 and the connecting groove 13 is provided on the top surface of the connecting seat 3. In this embodiment, the former arrangement is used.

[0062] It should be noted that the connecting post 33 can be integrally formed with the connecting seat 3, or it can be detachably connected to the connecting seat 3. The connecting post 33 can be inserted and fixed in the connecting groove 13 by interference fit or by screw connection or other means.

[0063] Please see the figure and Figure 7 In this embodiment, the connecting post 33 on the top surface of the connecting seat 3 and the mounting groove 31 on the bottom surface of the connecting seat 3 are arranged in a staggered manner.

[0064] Please see Figure 1 and Figure 3 In a specific embodiment, there are several hammer heads 2, which are arranged horizontally side by side. The number of movable cavities 11 is the same as the number of hammer heads 2, and the movable cavities 11 are arranged horizontally side by side and are respectively arranged vertically to correspond to each hammer head 2.

[0065] When multiple hammers 2 impact horizontally side by side, multiple stress concentration zones can be formed on the rock surface, promoting the rapid expansion of the crack network and thus improving the rock breaking efficiency. Each movable cavity 11 is arranged vertically and vertically corresponding to each hammer 2. Each movable cavity 11 can directly offset and disperse the rebound impact force transmitted back from the corresponding hammer 2, making it more targeted and effective.

[0066] It should be noted that the horizontal arrangement of each hammerhead 2 and each movable cavity 11, the horizontal arrangement of each set of connecting posts 33 and connecting grooves 13 in the above embodiment on the horizontal sides of the movable cavity 11, and the horizontal arrangement of the first mounting post 211 of each mounting post 21 on the horizontal sides of the second mounting post 212 of each mounting post 21 in the above embodiment are all in the same horizontal direction.

[0067] Please see Figure 1 , Figure 3 as well as Figures 5 to 7 In this embodiment, there are three hammer heads 2 and three movable cavities 11. The first movable cavity 11 has a set of connecting posts 33 and connecting grooves 13 and two sets of connecting posts 33 and connecting grooves 13 on its horizontal sides respectively. The third movable cavity 11 has two sets of connecting posts 33 and connecting grooves 13 and a set of connecting posts 33 and connecting grooves 13 on its horizontal sides respectively. The middle movable cavity 11 has two sets of connecting posts 33 and connecting grooves 13 on its horizontal sides corresponding to the first movable cavity 11 and two sets of connecting posts 33 and connecting grooves 13 corresponding to the third movable cavity 11 respectively.

[0068] Please see Figure 1 and Figure 2 In the above embodiments, the main body 1 includes a first part, a second part, and a third part connected sequentially from top to bottom. The first part has a constant diameter structure. The second part, in a frontal view, has a cross-section that gradually narrows and then widens from top to bottom. The third part, in a side view, has a cross-section that is first constant diameter and then gradually narrows from top to bottom. Furthermore, the connecting seat 3 and the hammer head 2 are both arranged with constant diameters in their cross-sections in the frontal view and with gradually narrowing cross-sections in their side view. This arrangement ensures that the energy for breaking the rock is concentrated in the hammer head 2, while also ensuring that the rebound impact force is distributed throughout the entire structure, thereby improving the overall stability and reliability of the structure.

[0069] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A rock-crushing rod, characterized in that, include: The main body is covered with a flexible layer, and a movable cavity is provided inside the main body. The movable cavity is arranged near the bottom end of the main body, and a number of movable parts are filled in the movable cavity, and the movable parts can move freely within the movable cavity. The hammerhead is located below the main body and is connected to the bottom end of the main body.

2. The rock-crushing rod according to claim 1, characterized in that, The movable cavity is cylindrical, extending from bottom to top, and the movable component is spherical.

3. The rock-crushing rod according to claim 1, characterized in that, The flexible layer is made of polyurea coating.

4. The rock-crushing rod according to any one of claims 1-3, characterized in that, The hammer head is detachably connected to the bottom end of the main body.

5. The rock-crushing rod according to claim 2, characterized in that, It also includes a connecting seat located between the body and the hammer head, and detachably connected to the bottom end of the body and the hammer head respectively, so that the hammer head is detachably connected to the bottom end of the body.

6. The rock-crushing rod according to claim 5, characterized in that, The bottom surface of the connecting seat and the top surface of the hammer head are respectively provided with mounting grooves and mounting posts. There are a plurality of mounting grooves and the number of mounting posts is the same as the number of mounting grooves. Each mounting post is inserted and fixed in its respective mounting groove so that the connecting seat and the hammer head can be detachably connected.

7. The rock-crushing rod according to claim 6, characterized in that, The mounting groove is provided on the bottom surface of the connector and includes a first mounting groove; The top surface of the connector is provided with a receiving groove that communicates with the first mounting groove. The rock-breaking rod also includes a nut, which is located within the receiving groove; The mounting post is disposed on the top surface of the hammer head and includes a first mounting post with external threads. The first mounting post passes through the first mounting groove to extend into the receiving groove and forms a threaded engagement with the nut to be inserted and fixed in the first mounting groove.

8. The rock-crushing rod according to claim 7, characterized in that, The mounting slot also includes a second mounting slot, the depth of which is greater than the depth of the first mounting slot; The mounting post further includes a second mounting post, the height of which is greater than that of the first mounting post. The second mounting post extends into the second mounting groove and forms an interference fit with the second mounting groove to be inserted and fixed in the second mounting groove. The second mounting slot of each of the mounting slots is centrally located on the bottom surface of the connecting seat, and the first mounting slots of each of the mounting slots are spaced apart around the second mounting slots of each of the mounting slots. The second mounting post of each of the mounting posts is centrally located on the top surface of the hammer head, and the first mounting posts of each of the mounting posts are spaced apart around the second mounting posts of each of the mounting posts.

9. The rock-crushing rod according to claim 5, characterized in that, The top surface of the connecting seat and the bottom surface of the main body are respectively provided with connecting posts and connecting grooves. The connecting posts and connecting grooves are arranged in groups, and there are several groups. The connecting posts in each group of the connecting posts and connecting grooves are inserted and fixed in the connecting grooves so that the connecting seat is detachably connected to the bottom end of the main body. The connecting posts and connecting grooves in each group are arranged at intervals around the movable cavity.

10. The rock-crushing rod according to any one of claims 1-3, characterized in that, The hammerhead is provided in a plurality of manners, and each hammerhead is arranged horizontally side by side. The number of movable chambers is the same as the number of hammers. Each movable chamber is arranged horizontally side by side and corresponds to the hammers above and below.

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