Striking block for head of electric tool

Abstract

The utility model relates to a striking block for the head of an electric tool, which comprises a striking block main body and is characterized in that the striking block main body is formed by integrally connecting a first boss, a transition part, a fixing part and a second boss in sequence from front to right, and drill bit mounting part insertion holes are formed in the fixing part and the second boss. The first boss and the transition part are internally provided with through holes for the drill bit drill rod part to extend out, the through holes are communicated with the drill bit installation part insertion hole, the side wall of the fixing part on one side of the drill bit installation part insertion hole is provided with an extending hole, the extending hole penetrates through the side wall of the fixing part, and the extending hole is communicated with the drill bit installation part insertion hole. A lock hole is formed in the side wall of the other side of the drill bit installation part insertion hole, the lock hole right faces the stretching-in hole, and an elastic positioning mechanism is further arranged on the inner wall of the fixing part. The design has the advantages of being simple in structure, easy to manufacture, practical and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a striking block used for the head of an electric tool. Background Art

[0002] In the 1960s, advances in battery manufacturing technology led to the emergence of cordless, battery-powered power tools powered by nickel-cadmium batteries. However, due to their high price, their development was slow. By the mid-to-late 1970s, with falling battery prices and shortened charging times, these power tools were widely used in Europe, the United States, and Japan. Power tools initially used cast iron as casings, but later switched to aluminum alloys. In the 1960s, thermoplastic engineering plastics were used in power tools, achieving double insulation and ensuring their safety. Advances in electronics also led to the emergence of electronically controlled power tools in the 1960s. These tools utilize electronic circuits composed of components such as thyristors. The speed is adjusted by the depth of a switch, allowing the tool to select different speeds based on the workpiece being processed (e.g., material, hole diameter, etc.).

[0003] Power tools are mainly categorized into metal cutting power tools, grinding power tools, assembly power tools, and railway power tools. Common power tools include electric drills, electric grinders, electric wrenches and screwdrivers, electric hammers and impact drills, concrete vibrators, and electric planers.

[0004] The strike block is an important metal accessory in power tools (electric drills), which is mainly used to connect the drill bit. However, in the actual installation process of the drill bit, it is necessary to first insert the mounting part of the drill bit into the strike block, and manually make the fixing hole on the mounting part face the lock hole on the strike block, and then fix the mounting part of the drill bit in the strike block by means of a pin or the like. The installation of the drill bit is often a one-person operation. During the process of taking and inserting the pin, the mounting part and the strike block are prone to relative rotation. At this time, the operator needs to realign it, which is very troublesome. Therefore, in order to improve the installation efficiency, it is particularly important to design a strike block for the head of the power tool. Summary of the Invention

[0005] In order to solve the above problems, the utility model designs a striking block for the head of an electric tool. An elastic positioning mechanism is provided on the inner wall of the fixing part. The drill bit mounting part is positioned by the elastic positioning mechanism to prevent relative rotation between the mounting part and the striking block during the process of taking out and inserting the pin, thereby facilitating the installation of the drill bit and improving practical performance.

[0006] In order to solve the above-mentioned technical problems, the utility model provides a striking block for the head of an electric tool, including a striking block body, characterized in that: the striking block body is composed of a first boss, a transition part, a fixing part and a second boss connected together from the front right, a drill bit mounting part insertion hole is provided in the fixing part and the second boss, a through hole for the drill rod part to extend is provided in the first boss and the transition part, the through hole is connected with the drill bit mounting part insertion hole, an insertion hole is provided on the side wall of the fixing part on one side of the drill bit mounting part insertion hole, the insertion hole passes through the side wall of the fixing part, a locking hole is provided on the side wall on the other side of the drill bit mounting part insertion hole, the locking hole is opposite to the insertion hole, and an elastic positioning mechanism is also provided on the inner wall of the fixing part.

[0007] Further: the elastic positioning mechanism includes a connecting hole, a first spring and a spherical clamping head opened on the inner wall of the fixing part. The spherical clamping head is connected to the connecting hole through the first spring. A hemispherical clamping groove matching the spherical clamping head is opened on the side wall of the drill mounting part opposite to the connecting hole. The spherical clamping head is clamped into the hemispherical clamping groove under the action of the first spring.

[0008] Furthermore: a spring limiting contact portion is provided on the outer wall of one end where the fixing portion and the transition portion are connected. The spring limiting contact portion is wrapped around the outside of the fixing portion and there is a gap between the two ends. The width of the raised portion gradually narrows from one end to the other end.

[0009] Furthermore: an oil filling hole is provided on the first boss on one side of the through hole, and the oil filling hole passes through the first boss and the transition part and is connected to the insertion hole of the drill mounting part.

[0010] After adopting the above structure, the beneficial effects of the utility model are as follows:

[0011] 1. The utility model is provided with an elastic positioning mechanism on the inner wall of the fixing part, which is used to position the drill bit mounting part to prevent relative rotation between the mounting part and the striking block during the process of taking out and inserting the pin, thereby facilitating the installation of the drill bit and increasing practical performance.

[0012] 2. The utility model has an oil filling hole on the first boss, through which lubricating oil can be easily injected into the striking block without disassembly and addition, which facilitates later maintenance.

[0013] 3. This design has the advantages of simple structure, easy manufacturing, practicality and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a three-dimensional diagram of the present utility model.

[0016] Figure 2 This is the main structural diagram of the utility model.

[0017] Figure 3 It is a side view of the present utility model.

[0018] Figure 4 This is the internal structure diagram of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1 、 Figure 2 and Figure 4 The striking block for the head of an electric tool shown in FIG. 1 includes a striking block body, which is composed, from the front right, of a first boss 3, a transition portion 2, a fixing portion 1, and a second boss 4, each connected together. A drill bit mounting hole is defined within the fixing portion and the second boss. A through hole for extending the drill shank portion of the drill bit is defined within the first boss and the transition portion. The through hole is connected to the drill bit mounting hole. An insertion hole 1-1 is defined on the sidewall of the fixing portion on one side of the drill bit mounting hole. The insertion hole penetrates the sidewall of the fixing portion. A locking hole 1-2 is defined on the other side of the drill bit mounting hole. The locking hole faces the insertion hole. An elastic positioning mechanism is also provided on the inner wall of the fixing portion. The elastic positioning mechanism is provided on the inner wall of the fixing portion to position the drill bit mounting portion, preventing relative rotation between the mounting portion and the striking block during removal and insertion of a latch, thereby facilitating installation of the drill bit and enhancing practical performance.

[0020] like Figure 4 The elastic positioning mechanism shown includes a connecting hole opened on the inner wall of the fixing part, a first spring and a spherical clamp 6. The spherical clamp is connected to the connecting hole through the first spring. A hemispherical clamping groove matching the spherical clamp is opened on the side wall of the drill bit mounting part opposite to the connecting hole. The spherical clamp is clamped into the hemispherical clamping groove under the action of the first spring.

[0021] like Figure 1 and Figure 2 A spring limiting contact portion 5 is provided on the outer wall of one end where the fixing portion and the transition portion are connected. The spring limiting contact portion is wrapped around the outside of the fixing portion with a gap between the two ends. The width of the raised portion gradually narrows from one end to the other.

[0022] like Figure 3 and Figure 4An oil filling hole 3-1 is provided on the first boss on one side of the through hole. The oil filling hole extends through the first boss and the transition portion and communicates with the drill bit mounting portion insertion hole. The utility model provides an oil filling hole on the first boss, which facilitates the injection of lubricating oil into the striking block without requiring disassembly for refilling, thus facilitating subsequent maintenance.

[0023] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A striking block for a power tool head, comprising a striking block body, characterized in that: The striking block body is composed of a first boss (3), a transition part (2), a fixing part (1) and a second boss (4) connected together from the front right, a drill bit mounting part insertion hole is provided in the fixing part and the second boss, a through hole for the drill rod part of the drill bit is provided in the first boss and the transition part, and the through hole is connected with the drill bit mounting part insertion hole, an insertion hole (1-1) is provided on the side wall of the fixing part on one side of the drill bit mounting part insertion hole, the insertion hole passes through the side wall of the fixing part, a locking hole (1-2) is provided on the side wall on the other side of the drill bit mounting part insertion hole, the locking hole is opposite to the insertion hole, and an elastic positioning mechanism is also provided on the inner wall of the fixing part.

2. The striking block for the head of an electric tool according to claim 1, characterized in that: The elastic positioning mechanism comprises a connecting hole provided on the inner wall of the fixing portion, a first spring and a spherical clamp (6); the spherical clamp is connected to the connecting hole via the first spring; a hemispherical clamping groove matching the spherical clamp is provided on the side wall of the drill bit mounting portion at a position opposite to the connecting hole; the spherical clamp is clamped into the hemispherical clamping groove under the action of the first spring.

3. The striking block for the head of an electric tool according to claim 1, characterized in that: A spring limiting contact portion (5) is provided on the outer wall of one end where the fixing portion and the transition portion are connected. The spring limiting contact portion is wound around the outer side of the fixing portion with a gap between the two ends. The width of the raised portion gradually narrows from one end to the other end.

4. The striking block for a power tool head according to claim 1, characterized in that: An oil filling hole (3-1) is provided on the first boss on one side of the through hole. The oil filling hole passes through the first boss and the transition portion and is connected to the insertion hole of the drill bit mounting portion.

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