Connecting ring for electric hammer

Abstract

The utility model provides a connecting ring for electric hammer, including annular body and the multiple first connecting parts of annular body outside circumference, the multiple first connecting parts are interval distribution between, and the annular body inside rotation setting has a plurality of needle roller along the circumference, the utility model discloses can improve the connecting stability and reliability of electric hammer connecting ring structure, prevent the connecting ring from heating and slipping.

Description

Technical Field

[0001] This utility model relates to the field of electric hammers, and in particular to a connecting ring for electric hammers. Background Technology

[0002] An electric hammer drill is an electrically powered rotary hammer drill equipped with a pneumatic hammering mechanism and a safety clutch. It utilizes the principle of piston movement to compress gas and impact the drill bit to achieve the purpose of reciprocating impact.

[0003] Existing electric hammers all have a connecting ring structure installed on the head shell to fix the distance between the roller and the rotating sleeve inside the machine gearbox during rotation or up and down movement. However, the outer ring structure of the existing connecting ring is smooth. During the use of the electric hammer, if the connecting ring overheats, it is easy for slippage to occur between the connecting ring and the head shell of the electric hammer. At the same time, the above problem is also likely to occur at the connection between the roller and the connecting ring. Utility Model Content

[0004] The purpose of this invention is to provide a connecting ring for electric hammers that can improve the connection stability and reliability of the connecting ring structure and prevent the connecting ring from slipping due to heat.

[0005] To solve the above-mentioned technical problems, this utility model provides a connecting ring for an electric hammer, including an annular body and a plurality of first connecting parts disposed on the outer periphery of the annular body. The plurality of first connecting parts are distributed at intervals, and a plurality of needle rollers are rotatably disposed inside the annular body along the circumferential direction.

[0006] Furthermore, a positioning ring is provided on the inner side of one end of the annular body, and the needle roller is rotatably embedded in the positioning ring.

[0007] Furthermore, the positioning ring is integrally connected to the annular body.

[0008] Furthermore, a number of second connecting portions are arranged circumferentially on the inner side of the end of the annular body away from the positioning ring.

[0009] Furthermore, the first connecting portion extends along the axial direction of the annular body.

[0010] Furthermore, the second connecting portion extends along the axial direction of the annular body.

[0011] Furthermore, the inner side of the annular body has a convex ring, the inner side of the second connecting part is flush with the inner ring of the convex ring, and the positioning ring is connected to the inner ring of the convex ring.

[0012] Furthermore, the annular body is made of nylon plastic.

[0013] The beneficial effects of this utility model are as follows: by using the first connector to snap the electric hammer head shell position, the connection between the outer circumferential position of the annular body and the head shell is stable and slippage will not occur. At the same time, by directly setting the needle roller inside the annular body, the connection between the needle roller and the annular body is tighter, thereby avoiding the problem of slippage between the connecting ring and the head shell or needle roller when the connecting ring overheats. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Reference numerals: 1. Annular body; 2. First connecting part; 3. Needle roller; 4. Positioning ring; 5. Second connecting part; 6. Protruding ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0017] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0018] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0019] like Figure 1 The present invention provides a connecting ring for an electric hammer, comprising an annular body 1 and a plurality of first connecting parts 2 disposed on the outer periphery of the annular body 1. The plurality of first connecting parts 2 are distributed at intervals, and a plurality of needle rollers 3 are rotatably disposed inside the annular body 1 along the circumferential direction.

[0020] The first connector secures the hammer head shell, ensuring a stable connection between the outer circumference of the annular body and the head shell, preventing slippage. Simultaneously, by directly placing the needle roller inside the annular body, the connection between the needle roller and the annular body becomes tighter, thus avoiding slippage between the connecting ring and the head shell or needle roller when the connecting ring overheats.

[0021] In one embodiment of this solution, the annular body 1 is made of nylon plastic to give the annular body a certain high temperature resistance, so that the annular body is not prone to overheating during use.

[0022] Preferably, a positioning ring 4 is provided on the inner side of one end of the annular body 1, and the needle roller 3 is rotatably embedded in the positioning ring 4.

[0023] Specifically, by setting a positioning ring, the needle roller is directly embedded in the positioning ring during installation, and the positioning ring is connected to the annular body, so that the needle roller and the annular body are directly connected, thereby effectively improving the stability of the needle roller in the annular body and preventing the needle roller from shifting or falling off during high-speed operation.

[0024] Preferably, the positioning ring 4 is integrally connected to the annular body 1.

[0025] In one embodiment of this solution, the needle roller can be embedded in the positioning ring by means of an injection molding machine, and the positioning ring can be formed on the annular body by injection molding, so that the positioning ring and the annular body are integrally connected, and the needle roller is rotatably embedded in the positioning ring.

[0026] Preferably, a plurality of second connecting portions 5 are arranged circumferentially on the inner side of the end of the annular body 1 away from the positioning ring 4.

[0027] Specifically, the inner side of the annular body is reinforced by the second connecting part, so that during the assembly process, the inner side of the annular body can be engaged with other connecting structures through the second connecting part. In turn, the inner and outer sides of the annular body are simultaneously engaged and fixed by the first connecting part and the second connecting part, avoiding the possibility of slippage at any position inside or outside the annular body.

[0028] Preferably, the first connecting portion 2 extends along the axial direction of the annular body 1, and the second connecting portion 5 extends along the axial direction of the annular body 1.

[0029] Specifically, the first and second connecting parts, which are axially extended, enable the inner and outer sides of the annular body to achieve circumferential limiting and locking of structures at different positions, preventing the annular body or other structures from sliding circumferentially. When the first and second connecting parts are set synchronously, they can further limit the structure connected to the inner side of the annular body and the head shell connected to the outer side of the annular body synchronously. At this time, the connecting ring plays the role of intermediate limiting.

[0030] It is worth mentioning that, at the head shell of the electric hammer and the structure that needs to be connected to the inner side of the ring body, a corresponding snap-fit ​​structure that can engage with the first or second connecting part is required. For example, the structure is the same as the first or second connecting part but offset, so as to achieve circumferential positioning between the connecting ring and the head shell or other connecting structures.

[0031] Preferably, the inner side of the annular body 1 has a convex ring 6, the inner side of the second connecting part 5 is flush with the inner ring of the convex ring 6, and the positioning ring 4 is connected to the inner ring of the convex ring 6.

[0032] Specifically, by setting the convex ring, the positioning ring is positioned closer to the inner side of the annular body than the second connecting part, so that the needle roller will not be interfered with by the second connecting part, thereby ensuring the stable rotation of the needle roller.

[0033] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A connecting ring for an electric hammer, characterized in that: It includes an annular body (1) and a plurality of first connecting parts (2) disposed on the outer periphery of the annular body (1), the plurality of first connecting parts (2) being distributed at intervals, and a plurality of needle rollers (3) being rotatably disposed inside the annular body (1) along the circumferential direction.

2. The connecting ring for an electric hammer according to claim 1, characterized in that: A positioning ring (4) is provided on the inner side of one end of the annular body (1), and the needle roller (3) is rotatably embedded in the positioning ring (4).

3. The connecting ring for an electric hammer according to claim 2, characterized in that: The positioning ring (4) is integrally connected to the annular body (1).

4. The connecting ring for an electric hammer according to claim 2, characterized in that: The annular body (1) has several second connecting parts (5) arranged circumferentially on the inner side of the end away from the positioning ring (4).

5. The connecting ring for an electric hammer according to claim 1, characterized in that: The first connecting part (2) extends along the axial direction of the annular body (1).

6. The connecting ring for an electric hammer according to claim 4, characterized in that: The second connecting part (5) extends along the axial direction of the annular body (1).

7. The connecting ring for an electric hammer according to claim 4, characterized in that: The inner side of the annular body (1) has a convex ring (6), the inner side of the second connecting part (5) is flush with the inner ring of the convex ring (6), and the positioning ring (4) is connected to the inner ring of the convex ring (6).

8. The connecting ring for an electric hammer according to claim 1, characterized in that: The annular body (1) is made of nylon plastic.

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