A multifunctional drill rod for a breaking hammer

Abstract

This utility model relates to a multifunctional chisel rod for a hydraulic breaker, comprising a connecting rod and a blade plate. The connecting rod has a connecting groove and a connecting rod hole. The connecting groove mates with the main body of the hydraulic breaker, and the connecting rod hole mates with the connecting end of the blade plate. Both the connecting rod hole and the connecting end are frustum-shaped. The maximum diameter of the cross-section of the connecting rod hole is greater than the minimum diameter of the cross-section of the connecting end, but less than or equal to the maximum diameter of the cross-section of the connecting end. The depth of the connecting rod hole is greater than or equal to the height of the connecting end. This technical solution ensures the connection strength during use is not easily broken, and also allows for the expansion of its application range by assembling and disassembling a ramming plate.

Description

Technical Field

[0001] This utility model relates to the field of accessories for excavating equipment, and in particular to a multi-functional chisel for a hydraulic breaker. Background Technology

[0002] As an important working tool of excavators, hydraulic breakers were originally crushing equipment. They work by driving a piston to reciprocate. During the piston's stroke, the piston strikes a chisel at high speed, which crushes solids such as ore and concrete. They can more effectively clear loose rocks and soil from rock crevices during the excavation of buildings.

[0003] With the expansion of excavator applications, excavators are also used in road repair. To meet the cutting and compaction needs in road repair, existing technologies modify the chisel part of the hydraulic breaker. For example, Chinese utility model patent CN223047868U discloses an integrated device with sweeping and cutting functions, including a connecting seat, a chisel, a cutter plate fixing seat, and a cutter plate. The connecting seat is fixed on the connecting frame body, one end of the chisel is connected and fixed to the connecting seat, and the other end is equipped with the cutter plate fixing seat. The cutter plate is installed on the cutter plate fixing seat, the chisel transmits the cutting force, and the cutter plate cuts the road surface. Another example is Chinese utility model patent CN204001019U, which discloses an earthwork compaction structure used with an excavator. The working end of the scrapped hydraulic breaker is cut flat using gas cutting welding, and a steel plate is welded onto the hydraulic breaker. In both of the above technical solutions, whether adding a blade plate or a tamping plate, the working end of the original chisel is first cut flat, and then the blade plate or tamping plate is connected to the original chisel by pins or welding. In actual use, due to the large vibration and impact force, both pin and welded connections are prone to breakage. In addition, the functions of the blade plate and tamping plate cannot be completed by the same chisel, which increases the number of accessories required and the replacement time. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a multi-functional chisel for a hydraulic breaker, which can ensure the connection strength during use and is not easily broken, while also being able to expand the range of applications by disassembling and assembling a ramming plate.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: A multifunctional chisel for a hydraulic breaker includes a connecting rod and a blade. The connecting rod has a connecting groove and a connecting rod hole. The connecting groove mates with the main body of the hydraulic breaker, and the connecting rod hole mates with the connecting end of the blade. Both the connecting rod hole and the connecting end are frustum-shaped. The maximum diameter of the cross-section of the connecting rod hole is greater than the minimum diameter of the cross-section of the connecting end, but less than or equal to the maximum diameter of the cross-section of the connecting end. The depth of the connecting rod hole is greater than or equal to the height of the connecting end.

[0006] Setting the drill rod into two parts, a connecting rod and a cutting plate, has two main technical advantages. First, it allows the connecting rod and the cutting plate to be separated, enabling replacement of the cutting plate if it is damaged. Second, it saves on processing materials compared to a one-piece drill rod, as the connecting rod does not need to be made from a single piece of material the width of the cutting plate. To ensure the strength and separability of the connection, a wedge-shaped fastening method is used between the connecting rod and the cutting plate. This involves setting up a matching frustum-shaped connection structure, and the pressure transmitted to the cutting plate during use presses the connecting end into the connecting rod hole to achieve a fastening. The impact pressure during operation is well distributed around the connecting rod hole, preventing the connection from breaking under impact.

[0007] Furthermore, the taper of the connecting rod hole is in the range of 1:50 to 1:30, and the taper of the connecting end is in the range of 1:55 to 1:35.

[0008] Excessive taper will increase the force on the vertical component of the connection, making the connecting rod hole prone to damage. Insufficient taper will lead to instability in the connection. Using the above-mentioned range of connecting rod hole and connecting end taper can balance connection stability and the stress on the connecting rod hole, achieving long-term stability.

[0009] Preferably, the taper of the connecting rod hole is the same as that of the connecting end, and the maximum diameter of the cross-section of the connecting rod hole is smaller than the maximum diameter of the cross-section of the connecting end.

[0010] Having the same taper ensures a larger contact area between the connecting rod hole and the connecting end. At the same time, the maximum diameter of the connecting rod hole cross-section is smaller than the maximum diameter of the connecting end cross-section, which ensures the connection strength while also preventing the connecting end from being completely enclosed by the connecting rod hole, making separation easier.

[0011] Preferably, both the connecting rod hole and the connecting end are chamfered.

[0012] The chamfered design facilitates the connection and guidance between the connecting rod and the blade plate.

[0013] Furthermore, it also includes a tamping plate and a pin. The tamping plate is provided with two connecting plates, the blade is disposed between the two connecting plates, the blade is provided with a blade hole, the connecting plates are provided with connecting plate holes, and the pin passes through the blade hole and the connecting plate hole and is limited in position.

[0014] By setting up a rammer plate and a pin shaft, the chisel rod can be converted into a blade plate or a rammer plate and is easy to assemble and disassemble.

[0015] Preferably, the hole in the blade or the hole in the connecting plate is a strip-shaped hole.

[0016] To reduce the stress on the pin and prevent breakage when using the rammer plate, the hole in the cutter plate or the hole in the connecting plate is made into a strip shape. This ensures that the pin is only stressed when the rammer plate is lifted, while the pin is suspended in the air and not subjected to stress when the cutter plate applies an impact force to the rammer plate.

[0017] Preferably, the ramming plate is further provided with a reinforcing plate, which intersects with the connecting plate.

[0018] Because the blade plate vibrates during use and impacts the connecting plate, a reinforcing plate is installed to ensure that the connecting plate does not deform outward due to the impact during use.

[0019] Preferably, the ramming plate is further provided with reinforcing blocks, which are disposed between the connecting plates and cooperate with the blade plate.

[0020] The service life of the tamping plate is extended by setting up reinforcing blocks to work in conjunction with the blade.

[0021] Preferably, the two sides of the ramming plate are curved upwards.

[0022] The upward curves on both sides of the tamping plate prevent the compacted material from being thrown onto the plate due to vibration, and also serve as a guide when the tamping plate moves.

[0023] Preferably, the pin is positioned within the blade hole and the connecting plate hole by a cotter pin.

[0024] The device uses a cotter pin and a pivot pin for locking, allowing for quick disassembly via simple insertion and removal, and it will not loosen under high-frequency vibration.

[0025] Compared with the prior art, this utility model has the following advantages and effects: 1. The drill rod is configured into two parts: a connecting rod and a cutting plate, which facilitates separation and saves processing materials; 2. The frustum shape is matched to achieve wedge fastening, which ensures fastening while preventing breakage under impact; 3. The specific connection structure of the connecting rod and the blade plate further improves the connection strength and reduces the difficulty of connection and separation; 4. The tamping plate and pin shaft allow the chisel rod to be converted into a cutting plate or tamping plate and facilitate disassembly and assembly; 5. The slotted hole design prevents the impact force applied by the blade to the ramming plate from being transmitted to the pin. 6. The specific structure of the ramming plate ensures its structural strength and service life. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an assembly diagram of Example 1.

[0028] Figure 2 This is a schematic diagram of the connecting rod in Example 1.

[0029] Figure 3 This is a schematic diagram of the blade plate in Example 1.

[0030] Figure 4 This is a schematic diagram of the connecting rod and blade plate in Example 2.

[0031] Figure 5 This is a schematic diagram of the structure of the ramming plate in Example 2.

[0032] Figure 6 This is a schematic diagram of the structure of the connecting rod, blade, and tamping plate in Example 2.

[0033] Figure 7 This is a schematic diagram of the structure of the pin and cotter pin in Example 2.

[0034] Label Explanation: The components include: hammer body 1, chisel positioning pin 11, positioning pin fixing pin 12, connecting rod 2, connecting groove 21, connecting head 22, connecting rod hole 23, blade plate 3, connecting end 31, blade plate hole 32, ramming plate 4, connecting plate 41, connecting plate hole 42, reinforcing plate 43, reinforcing block 44, upturned part 45, pin shaft 5, pin shaft hole 51, and cotter pin 6. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0036] Example 1: like Figures 1 to 2 As shown, this embodiment is a multi-functional chisel for a hydraulic breaker, including a connecting rod 2 and a cutter plate 3. The connecting rod 2 is provided with a connecting groove 21, which is used to cooperate with the hydraulic breaker body 1. When the connecting rod 2 is installed to the hydraulic breaker body 1, the connecting rod 2 is first installed to a predetermined position, and then the chisel positioning pin 11 is inserted to cooperate with the connecting groove 21 to limit the connecting rod 2. Then, the positioning pin fixing pin 12 is inserted to fix the chisel positioning pin 11 to complete the installation. The cutter plate 3 is connected to the connector 22 at the front end of the connecting rod 2. During operation, the piston stroke in the hydraulic breaker body 1 strikes the connecting rod 2 and transmits the force to the cutter plate 3 to achieve cutting in road repair.

[0037] Combination Figure 3The blade plate 3 has an upwardly extending connecting end 31, and the connecting rod 2 has a downwardly extending connecting head 22. The connecting head 22 has a hollowed-out connecting rod hole 23. The connecting rod 2 and the blade plate 3 are connected by installing the connecting end 31 into the connecting rod hole 23. The connecting rod hole 23 and the connecting end 31 are fastened with a wedge shape. Specifically, both the connecting rod hole 23 and the connecting end 31 are frustum shapes with progressively increasing cross-sectional diameters from top to bottom. The frustum shape of the connecting rod hole 23 has a depth H1 = 70 mm and an additional chamfered portion with a radius of 5 mm. Therefore, the total depth of the connecting rod hole 23 is 75 mm. The minimum cross-sectional diameter L1 of the frustum shape of the connecting rod hole 23 is 45 mm, and the maximum cross-sectional diameter L2 is 47 mm. Excluding the chamfered portion, the taper of the connecting rod hole 23 is 1:35. The frustum shape of the connecting end 31 has a height H2=70mm and an additional chamfered portion with a radius of 3mm, so the total height of the connecting end 31 is 73mm. The minimum cross-sectional diameter of the frustum shape of the connecting end 31 is L3=45.5mm and the maximum cross-sectional diameter is L4=47.5mm. Excluding the chamfered portion, the taper of the connecting end 31 is 1:35. When the connecting rod 2 and the blade plate 3 are assembled, the connecting end 31 is first manually inserted into the connecting rod hole 23, and then the two are installed on the breaker body 1 and the blade plate 3 is pressed against a hard object such as the ground. The force is applied to the ground by the excavator's boom or the breaker body 1, and the connecting end 31 is pressed into the connecting rod hole 23 to achieve wedge-shaped fastening. Since the connecting end 31 and the connecting rod hole 23 have the same taper, a larger contact area can be obtained between the two.

[0038] In other embodiments, the connecting end and the connecting rod hole may have different tapers than in Embodiment 1 and the two are not equal. To further balance the connection stability and the stress on the connecting rod hole, the taper range of the connecting rod hole can be arbitrarily selected within 1:50 to 1:30, while the taper range of the connecting end can be arbitrarily selected within 1:55 to 1:35. For example, the maximum diameter of the connecting rod hole cross-section can be equal to the maximum diameter of the connecting end cross-section, the depth of the connecting rod hole can be equal to the height of the connecting end, and the taper of the connecting rod hole (e.g., 1:30) can be greater than the taper of the connecting end (e.g., 1:50).

[0039] Example 2: like Figure 4 and 5 As shown, the blade 3 in this embodiment has a blade hole 32 for connecting with the ramming plate 4. The blade hole 32 is a strip-shaped hole, thereby allowing the pin 5 (see...) Figure 6 and 7The blade plate 3 moves up and down within the blade hole 32. The ramming plate 4 has a flat bottom surface with upturned corners 45 on both sides. A reinforcing block 44 is welded above the bottom surface of the flat plate. Two connecting plates 41 are welded close to the reinforcing block 44. The gap between the two connecting plates 41 allows the blade plate 3 to enter and press against the reinforcing block 44. The two connecting plates 41 also have connecting plate holes 42. The connecting plate holes 42 are also strip-shaped holes and are aligned with the blade hole 32 when the blade plate 3 enters the gap. A reinforcing plate 43 that intersects with the two connecting plates 41 is also welded to the bottom surface of the flat plate.

[0040] Combination Figure 6 and 7 When the blade 3 enters the gap between the two connecting plates 41, the pin 5 passes through the aligned connecting plate hole 42 and blade hole 32 and is limited, thus connecting the blade 3 and the ramming plate 4. Specifically, after the pin 5 passes through the connecting plate hole 42 and blade hole 32, it is positioned by the cotter pin 6. The cotter pin 6 passes through the pin hole 51 on the pin 5 and is fixed on the pin 5. The cotter pin 6 presses against the connecting plate 41 to prevent the pin 5 from coming out of the connecting plate hole 42 and blade hole 32.

[0041] When the multi-functional chisel for the hydraulic breaker is installed with the tamping plate 4, the impact pressure of the piston stroke is transmitted through the pressing of the reinforcing block 44 by the blade plate 3. At this time, the pin 5 is located at the lower end of the strip hole or in a suspended position. The downward pressure applied to the tamping plate 4 will not be transmitted to the pin 5. When the blade plate 3 is lifted to drive the tamping plate 4, the pin 5 is located at the lower end of the blade hole 32 and the upper end of the connecting plate hole 42, thereby lifting the tamping plate 4.

[0042] Furthermore, it should be noted that the shapes and names of the parts and components described in the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A multi-functional chisel rod for a hydraulic breaker, characterized in that: The device includes a connecting rod and a blade plate. The connecting rod has a connecting groove and a connecting rod hole. The connecting groove mates with the main body of the breaker, and the connecting rod hole mates with the connecting end of the blade plate. Both the connecting rod hole and the connecting end are frustum-shaped. The maximum diameter of the cross-section of the connecting rod hole is greater than the minimum diameter of the cross-section of the connecting end, but less than or equal to the maximum diameter of the cross-section of the connecting end. The depth of the connecting rod hole is greater than or equal to the height of the connecting end.

2. The multi-functional chisel rod for a hydraulic breaker according to claim 1, characterized in that: The taper of the connecting rod hole is in the range of 1:50 to 1:30, and the taper of the connecting end is in the range of 1:55 to 1:

35.

3. The multi-functional chisel rod for a hydraulic breaker according to claim 2, characterized in that: The taper of the connecting rod hole is the same as that of the connecting end, and the maximum diameter of the cross-section of the connecting rod hole is smaller than the maximum diameter of the cross-section of the connecting end.

4. The multi-functional chisel rod for a hydraulic breaker according to claim 1, characterized in that: Both the connecting rod hole and the connecting end are chamfered.

5. The multi-functional chisel rod for a hydraulic breaker according to any one of claims 1 to 4, characterized in that: It also includes a tamping plate and a pin. The tamping plate is provided with two connecting plates, and the blade is provided between the two connecting plates. The blade is provided with a blade hole, and the connecting plates are provided with connecting plate holes. The pin passes through the blade hole and the connecting plate hole and is limited in position.

6. The multi-functional chisel rod for a hydraulic breaker according to claim 5, characterized in that: The hole in the blade or the hole in the connecting plate is a strip-shaped hole.

7. The multi-functional chisel rod for a hydraulic breaker according to claim 5, characterized in that: The ramming plate is also provided with a reinforcing plate, which intersects with the connecting plate.

8. The multi-functional chisel rod for a hydraulic breaker according to claim 5, characterized in that: The ramming plate is also provided with reinforcing blocks, which are arranged between the connecting plates and cooperate with the blade plate.

9. The multi-functional chisel rod for a hydraulic breaker according to claim 5, characterized in that: The two sides of the ramming plate are curved upwards.

10. The multi-functional chisel rod for a hydraulic breaker according to claim 5, characterized in that: The pin is positioned within the blade hole and the connecting plate hole by a cotter pin.

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