A break hammer drill rod facilitating quick switching

Abstract

The utility model provides a kind of to break hammer drill rod of quick switching with convenience, including drill rod body, striking head and positioning key, the one end of striking head is equipped with stepped boss close to drill rod body, stepped recess that is matched with stepped boss is equipped on drill rod body, and the inside of stepped recess is equipped with telescopic device for connecting stepped boss, positioning key is embedded between stepped boss and stepped recess, to prevent stepped boss and stepped recess from circumferential rotation. By drill rod body connection different striking head, not only can be applied to different application fields and work conditions, improve the application range of breaking hammer. Moreover, it avoids the problem of replacing whole drill rod due to striking head damage, greatly improves drill rod utilization.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic breaker technology, and in particular to a hydraulic breaker chisel that is easy to switch quickly. Background Technology

[0002] As a core attachment of hydraulic excavators, the hydraulic breaker has seen continuous market demand growth driven by the ongoing expansion of infrastructure projects and the rapid development of the excavator industry. This equipment is widely used in construction, municipal engineering, mining, metallurgy, and highway and railway construction. The breaker's chisel is the core component of the hydraulic breaker, used to transmit the high-frequency impact force generated by the piston to the material being broken, such as rock and concrete, to achieve the breaking operation.

[0003] Different types of chisels are often required for different applications and working conditions. However, existing hydraulic breaker chisels are generally one-piece structures, requiring complete disassembly for replacement. Frequent replacements of different types of chisels not only increase labor costs but also affect work efficiency and project progress. For large-sized chisels, their enormous weight makes manual operation extremely inconvenient, and the replacement process itself is cumbersome and complex, requiring a significant investment of manpower, resources, and time. Furthermore, hydraulic breakers rely on piston impacts to break materials at the chisel tip, causing the tip to endure enormous impact forces and wear, making it prone to breakage, chipping, chipping, or excessive wear. Since these problems are mostly concentrated at the tip, replacing the entire chisel results in serious cost waste. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a hydraulic breaker chisel that is easy to switch quickly, including a chisel body, a striking head, and a positioning key. The striking head has a stepped boss at one end near the chisel body. The chisel body has a stepped groove that matches the stepped boss, and the inner side of the stepped groove has a telescopic device for connecting the stepped boss. The positioning key is embedded between the stepped boss and the stepped groove to prevent the stepped boss and the stepped groove from rotating circumferentially.

[0005] Furthermore, the stepped boss includes an outer boss and a stepped boss located inside the outer boss, and the outer peripheral surface of the outer boss is provided with an annular positioning groove.

[0006] Furthermore, the stepped groove includes an outer stepped groove and a bottom recess located inside the outer stepped groove. The outer wall of the bottom recess is provided with a plurality of positioning through holes that are evenly distributed along its circumference to accommodate the telescopic device.

[0007] Furthermore, the telescopic device includes a plug, a spring, and a positioning ball. The plug is connected to the outside of the positioning through hole, the positioning ball is connected to the inside of the positioning through hole, and the spring is disposed in the positioning through hole and located between the plug and the positioning ball.

[0008] Furthermore, the plug is connected to the positioning through hole by a thread.

[0009] Furthermore, the inner wall of the external stepped groove has at least one keyway I extending to its opening end, and the outer peripheral surface of the striking head near the end of the drill rod body is provided with a keyway II extending to the stepped boss. One end of the positioning key is embedded in the keyway I, and the other end is embedded in the keyway II.

[0010] Furthermore, the positioning key is a stepped key, with the end connected to the keyway I being the small end and the end connected to the keyway II being the large end.

[0011] Furthermore, the end of the striking head furthest from the stepped protrusion is cone-shaped, flat-headed, straight-lined, or pyramidal.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The breaker's chisel rod of this utility model, which facilitates quick switching, adopts a split structure. The chisel rod body and the striking head are connected via a telescopic device and a positioning key, enabling rapid replacement of the striking head. By connecting different striking heads to the chisel rod body, it can be applied to different application fields and working conditions, thus improving the application range of the breaker.

[0013] 2. The breaker chisel rod of this utility model, which is easy to switch quickly, can separate the impact head, which is prone to problems, and make it a replaceable part, thus avoiding the problem of replacing the entire chisel rod due to damage to the impact head, and greatly improving the utilization rate of the chisel rod. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the hydraulic breaker chisel rod of this utility model, which facilitates quick switching. Figure 2 This is a schematic diagram of the structure of the striking head of this utility model; Figure 3 This is a schematic diagram of the structure of the drill rod body of this utility model; Figure 4 This is a cross-sectional view of the hydraulic breaker chisel rod of this utility model that facilitates quick switching (a is a vertical cross-sectional view, b is a horizontal cross-sectional view). Figure 5 This is a cross-sectional view of the drill rod body of this utility model (a is a partial enlarged view of b). Figure 6 This is a partial cross-sectional view of the drill rod body of this utility model; Figure 7 This is a schematic diagram of the flat-headed striking head of this utility model; Figure 8 This is a schematic diagram of the structure of the single-line striking head of this utility model; Figure 9 This is a schematic diagram of the structure of the square pyramid-shaped striking head of this utility model; In the picture: 1. Drill rod body; 101. Positioning through hole; 102. Plug; 103. Spring; 104. Positioning ball; 105. Bottom recess; 106. External stepped groove; 107. Keyway I; 2. Impact component; 201. External boss; 202. Annular positioning groove; 203. Stepped boss; 204. Keyway II; 3. Positioning key; 4. Flat-head impact head; 5. Straight-line impact head; 6. Four-sided pyramidal impact head. Detailed Implementation

[0015] To facilitate understanding of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] The present invention will now be described in detail. In the following paragraphs, different aspects of the embodiments are defined in more detail. These aspects may be combined with any other aspect or multiple aspects unless explicitly stated otherwise. In particular, any feature considered preferred or advantageous may be combined with one or more other features considered preferred or advantageous.

[0017] In the description of this utility model, it should be understood that the terms "inner", "outer", "upper", "lower", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0018] refer to Figure 1-3 As shown, this utility model discloses a breaker chisel that is easy to switch quickly, including a chisel body 1, a striking head 2 and a positioning key 3. The chisel body 1 is a cylindrical structure, with one end connected to the breaker and the other end connected to the striking head 2.

[0019] The striking head 2 has a stepped boss at one end near the drill rod body 1. The drill rod body 1 has a stepped groove that matches the stepped boss, and the inner side of the stepped groove has a telescopic device for connecting the stepped boss. The positioning key 3 is embedded between the stepped boss and the stepped groove to prevent the stepped boss and the stepped groove from rotating circumferentially.

[0020] In existing technologies, hydraulic breaker chisels are generally of a one-piece structure. Different types of chisels are often required for different applications and working conditions. Frequent replacement of different types of chisels not only increases labor costs but also affects work efficiency and project progress. Furthermore, when the chisel tip breaks, chips, or curls due to immense impact, or becomes excessively worn after prolonged use, the entire chisel must be replaced, resulting in significant cost waste.

[0021] In this embodiment, the hydraulic breaker's chisel adopts a split structure, and the chisel body 1 is connected to the striking head 2 via a telescopic device and a positioning key 3, enabling quick replacement of the striking head 2. By connecting different striking heads 2 to the chisel body 1, it can be applied to different application fields and working conditions, thus increasing the application range of the hydraulic breaker. Furthermore, separating the striking head 2, which is prone to problems, as a replaceable component avoids the need to replace the entire chisel due to damage to the striking head 2, greatly improving the utilization rate of the chisel.

[0022] In addition, the stepped assembly structure increases the load-bearing area, improves the connection rigidity and strength, and achieves precise positioning, ensuring overall assembly accuracy, simplifying assembly difficulty, and reducing the skill requirements for operators.

[0023] refer to Figure 4-6 As shown, in some embodiments, the stepped boss includes an outer boss 201 and a stepped boss 203 located inside the outer boss 201. The outer peripheral surface of the outer boss 201 is provided with an annular positioning groove 202. The stepped groove includes an outer stepped groove 106 and a bottom recess 105 located inside the outer stepped groove 101. The outer wall of the bottom recess 105 is provided with eight positioning through holes 101 evenly distributed along its circumference to accommodate the telescopic device. The telescopic device includes a plug 102, a spring 103, and a positioning ball 104. Preferably, the plug 102 and the positioning ball 104 are both made of metal. The plug 102 is connected to the outside of the positioning through hole 101, the positioning ball 104 is connected to the inside of the positioning through hole 101, and the spring 103 is disposed in the positioning through hole 101 and located between the plug 102 and the positioning ball 104.

[0024] In the above embodiments, there are several options for the specific connection method between the plug 102 and the positioning through hole 101, such as a threaded connection. The end of the positioning through hole 101 connected to the plug 102 is provided with an internal thread, and the plug 102 is provided with an external thread corresponding to the internal thread.

[0025] In some embodiments, at least one keyway I 107 extending to its opening end is provided on the inner wall of the outer stepped groove 106. Preferably, there are two keyways I 107, symmetrically distributed on the side wall of the outer stepped groove 106. The outer peripheral surface of the striking head 2 near the end of the drill rod body 1 is provided with a keyway II 204 extending to the stepped boss 203. One end of the positioning key 3 is embedded in the keyway I 107, and the other end is embedded in the keyway II 204. The drill rod body 1 and the striking head 2 are circumferentially fixedly connected by the positioning key 3, ensuring that the striking head 2 will not rotate during the striking operation, thus ensuring a reliable and stable connection.

[0026] In the above embodiments, the specific structural form of the positioning key 3 can be selected according to actual needs. For example, the positioning key 3 is a stepped key, with the end connected to the keyway I 107 being the small end and the end connected to the keyway II 204 being the large end.

[0027] During installation, the positioning key 3 is installed on one of the keyways I 107 and II 204. While the stepped boss on the striking head 2 is inserted into the stepped groove on the drill rod body 1, the positioning key 3 is aligned with the other of the keyways I 107 and II 204. External force is used to push the striking head 2 into the stepped groove on the drill rod body 1. The positioning ball 104 is compressed by the outer boss 201 on the striking head 2, compressing the spring 103 and retracting into the positioning through hole 101. When the annular positioning groove 202 on the outer boss 201 reaches the positioning ball 104, under the elastic force of the spring 103, the positioning ball 104 enters the annular positioning groove 202, thereby connecting the drill rod body 1 and the striking head 2 and preventing the striking head 2 from falling off the drill rod body 1.

[0028] During disassembly, an external force is used to drag the striking head 2 outward from the stepped groove on the drill rod body 1. The positioning ball 104 is squeezed by the outer protrusion 201 on the striking head 2, and the positioning ball 104 compresses the spring 103 and retracts into the positioning through hole 101. This separates the striking head 2 from the drill rod body 1.

[0029] refer to Figure 7-9 As shown, in some embodiments, the end of the impact head 2 furthest from the stepped boss is conical, flat, straight, or pyramidal. The conical impact head, with its conical slotted structure, is widely used in various demolition operations, roads, bridges, and civil engineering projects. The flat impact head 4 can be used for secondary crushing in mines, asphalt pavement repair, and site leveling. The straight impact head 5 is suitable for crushing medium-hardness layered rocks, asphalt pavement, and concrete structure demolition. The pyramidal impact head 6 is suitable for secondary crushing of soft and medium-hardness rocks and crushing high-hardness concrete or soft non-layered rocks. By quickly switching the impact head 2, different operational requirements can be met, greatly expanding the application range of the hydraulic breaker and reducing the labor intensity of workers.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A break hammer bit shaft for facilitating quick change, characterized in that, The device includes a drill rod body (1), a striking head (2), and a positioning key (3). The striking head (2) has a stepped boss at one end near the drill rod body (1). The drill rod body (1) has a stepped groove that matches the stepped boss. The stepped groove has a telescopic device for connecting the stepped boss inside. The positioning key (3) is embedded between the stepped boss and the stepped groove to prevent the stepped boss and the stepped groove from rotating circumferentially.

2. A break hammer tool shank for quick change over ease according to claim 1, characterized in that, The stepped boss includes an outer boss (201) and a stepped boss (203) located inside the outer boss (201). The outer peripheral surface of the outer boss (201) is provided with an annular positioning groove (202).

3. A break hammer tool shank for facilitating quick changeover in accordance with claim 2, characterized in that, The stepped groove includes an outer stepped groove (106) and a bottom recess (105) located inside the outer stepped groove (106). The outer wall of the bottom recess (105) is provided with a plurality of positioning through holes (101) evenly distributed along its circumference to accommodate the telescopic device.

4. A break hammer tool shank for facilitating quick changeover in accordance with claim 3, characterized in that, The telescopic device includes a plug (102), a spring (103), and a positioning ball (104). The plug (102) is connected to the outside of the positioning through hole (101), the positioning ball (104) is connected to the inside of the positioning through hole (101), and the spring (103) is disposed in the positioning through hole (101) and located between the plug (102) and the positioning ball (104).

5. A break hammer shank for expedited quick change over, according to claim 4, characterized in that, The plug (102) is connected to the positioning through hole (101) by a thread.

6. A break hammer shank for expedited quick change over, according to claim 3, wherein, At least one keyway I (107) extending to its opening end is on the inner wall of the external stepped groove (106). The outer peripheral surface of the striking head (2) near the end of the drill rod body (1) is provided with a keyway II (204) extending to the stepped boss (203). One end of the positioning key (3) is embedded in the keyway I (107) and the other end is embedded in the keyway II (204).

7. A break hammer tool shank for facilitating quick changeover in accordance with claim 6, characterized in that The positioning key (3) is a step key, with the end connected to the keyway I (107) being the small end and the end connected to the keyway II (204) being the large end.

8. The quick switchable breaking hammer rod of claim 1, wherein, The end of the striking head (2) away from the stepped protrusion is cone-shaped, flat-headed, straight-lined, or square-pyramid-shaped.

Images